2024-03-29T00:47:33Z
https://revistas.javeriana.edu.co/index.php/iyu/oai
oai:ojs.revistas-javeriana.repositoriodigital.com:article/892
2020-11-02T05:38:59Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/892
2020-11-02T05:38:59Z
Pontificia Universidad Javeriana
Vol. 8 No. 1 (2004): January-June
Estudio de sismicidad regional para el análisis de la amenaza sísmica de Bogotá
Article
Caneva-Rincón, Alexander; Pontificia Universidad Javeriana
Salcedo-Hurtado, Elkin de Jesús; Universidad del valle
Van-Hissenhoven, René; Pontificia Universidad Javeriana
Alfaro-Castillo, Andrés José; Universitat Politecnica de Catalunya
2020-11-02
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/892
regional seismicity
representative magnitude
seismic sources
Bogotá
es_ES
In this paper the results of the seismic regional hazard analysis for Bogotá and their influence in the local seismic hazard for the Javeriana University Campus are presented. The research includes update of seismological data and the analysis of the state-of-the-art of the seismological database. This includes 34920 seismic records; after a depuration process, only 7539 events were useful, which were used to estimate the maximum probable magnitude and peak ground acceleration likely to occur in a 475 year interval. The results were obtained from the analysis of representative magnitude Mmin, from the database completeness, from regional b-value estimation, from seismic sources analysis and from the attenuation of peak ground acceleration.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/893
2020-11-02T05:48:33Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/893
2020-11-02T05:48:33Z
Pontificia Universidad Javeriana
Vol. 8 No. 1 (2004): January-June
Estudio de la vulnerabilidad sísmica estructural de una edificación tipo hospital
Article
Amézquita, Alfonso; Pontificia Universidad Javeriana
Muñoz-Díaz, Edgar Eduardo; Pontificia Universidad Javeriana
Quintero, José; Pontificia Universidad Javeriana
Forero, Miguel; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/893
Seismic hazard
vulnerability
Micro-Zonation
waffle construction
acceleration
rigidity
pushover
es_ES
Accordingly with Colombian seismic hazard studies, Bogotá D.C. is located in an intermediate hazard seismic zone. The law establishes the evaluation of the seismic structures vulnerability in buildings in which it use is classified as indispensable for public service facilities, built before 1998 and located in areas of high and intermediate seismic activity. On the other side, in the Micro-Zonation Study of Bogotá the hospital facility in study, is located in a zone with ground acceleration of 0.75g (Hazard seismic zone 2 of the Micro-Zonation). There are hospital’s structures that were designed and builded in the early 1950’s without considering detailed structural seismic resistance. For these reason it is probable that structural and not structural elements of this structures would not be able to withstand the solicitations induced by an earthquake of some importance. This paper resumes the methodology followed in the study of the seismic vulnerability of a hospitaly structures, following by the Federal Emergency Management Agency (FEMA-310). It is estimated the expected damagein the structural elements of this building’s type based on the local threat. It is very common to find in most of this buildings, structural systems as the waffle construction that is highly vulnerable.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/894
2020-11-08T07:15:52Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/894
2020-11-08T07:15:52Z
Pontificia Universidad Javeriana
Vol. 8 No. 1 (2004): January-June
Los web services como herramienta generadora de valor en las organizaciones
Article
Chaparro-López, Hilda Cristina; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/894
Web services
organizations
value chain
es_ES
Consulting technology companies have begun to understand the need to correctly identify the chains of value of the organization, with the purpose of redefine and harness these chains using information technologies. On the other hand, the e-business field is changing and new elements appear, that will be able to obtain in a near future a pure e-business; the key will be the integration of the organization’s extended value chains, not without making an integration of the internal ones. Web Services seem to be the possible solution for the integration of the value chains. This paper deals with the way in which this new technology can harness the business and generate competitive advantage in the organization. Two methodological guidelines are discussed: the first one in order to construct value chains and the second one in order to identify Web Services from these chains. The validation and conclusions of the proposed guidelines are also presented.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/895
2020-12-10T04:43:39Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/895
2020-12-10T04:43:39Z
Pontificia Universidad Javeriana
Vol. 8 No. 1 (2004): January-June
Análisis empírico del efecto del tamaño de la información de entrada en el desempeño de herramientas de compresión sin pérdida
Article
Torres-Moreno, Miguel Eduardo; Pontificia Universidad Javeriana
Flórez-Larrahondo, Germán; Mississippi State University
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/895
Data compression
lossless algorithms
algorithm’s performance
es_ES
This paper presents an empirical study of the effect that different input sizes have on the performance of lossless data compression algorithms. We analyzed three different performance measures and created a new dataset based on the Calgary and Canterbury corpus. This dataset also includes two new “complex” files as well. We demonstrated that for large files the compression ratio of the lossless algorithms stays fairly constant and only changes by a small factor every 10MB. Finally, we have shown that the execution time for compressing and Decompression data is a linear function based on the size of the input.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/896
2020-11-02T05:22:06Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/896
2020-11-02T05:22:06Z
Pontificia Universidad Javeriana
Vol. 8 No. 2 (2004): July-December
Análisis de la robustez en la estabilidad y el desempeño de un sistema de control lateral para automóviles
Article
Prieto-Martínez, Luis David; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/896
Control
multivariable control
industrial automation
es_ES
This paper presents a practical application of a modern methodology for analyzing the effects of parametric and unstructured uncertainty in the internal stability and performance of a Multivariable control system. The proposed approach is based on the complementary combination of two main mathematical concepts: first, the Linear Fractional Transformation (LFT) used as a matrix function that allows a unified representation of different types of model uncertainty. The second, the Structured Singular Value Function (SSV or m) that provides a necessary and sufficient condition for the robustness test with a moderate amount of computation complexity. The methodology is applied to a Vehicle Lateral Control System (VLCS) developed by a research team of the Automation Department of the Politecnico di Torino in partnership with Centro Ricerca FIAT (CRF) and experimentally tested in a Fiat Brava 1600 ELX in an Italian Highway.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/897
2020-11-02T05:21:07Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/897
2020-11-02T05:21:07Z
Pontificia Universidad Javeriana
Vol. 8 No. 2 (2004): July-December
Metodología marco de referencia para localización de instalaciones
Article
García-Cáeres, Rafael Orlando; Pontificia Universidad Javeriana
Caro-Gutiérrez, Martha Patricia; Pontificia Universidad Javeriana
Díaz-Gómez, Héctor Bernardo; Pontificia Universidad Javeriana
Sánchez-Dávila, Laura Leticia; Pontificia Universidad Javeriana
Carillo-Ramírez, Martha Helena; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/897
Decision making
Facilities Location
Integral Analysis Methodology
es_ES
In this article a theoretical and practical development of a secuential decisión making- methodology for choosing the optimal location of facilities is presented. The decisión making process is part of the so-called Integral Análisis Methodology (MAI) [García, Durand, Palacios, 2004], which is divided into two different steps. The first one, the project visualization consists of two different criteria corresponding to the project evaluation and the project sizing applied to the determination of the relevant aspects of the decision making process. The second step is the determination of the set of possible sites of a facility, which is analyzed under three different points of view: the macro, the micro and the nanolocation process. The results of the application of the methodology in a colombian coffee chain are also presented.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/898
2021-04-13T20:58:05Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/898
2021-04-13T20:58:05Z
Pontificia Universidad Javeriana
Vol. 9 No. 1 (2005): January-June
Función de transferencia para un rectificador con factor de potencia unitario, en configuración de medio puente, controlado por DSP
Article
Hay-Harb, Abdel Karim; Pontificia Universidad Javeriana
Perilla-Galindo , Gabriel; Pontificia Universidad Javeriana
Ruiz, Fredy Orlando; Pontificia Universidad Javeriana
Cotrin-Badillo, Carlos Eduardo; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/898
Rectifier
power factor
unity power factor
half bridge
DSP
Transfer function
equivalent circuit
es_ES
A small signal equivalent circuit for a single phase rectifier in half bridge configuration, with power factor close to one is developed. From this representation an equation for the input current is presented in terms of the line voltage and the duty cycle. The frequency response is obtained for both a continuous and a discrete controller of the proportional plus integral type. The values of the total harmonic distortion and the power factor obtained from the simulation of the discrete case are compared with the implementation of a circuit based on a DSP.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/899
2020-11-02T05:29:01Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/899
2020-11-02T05:29:01Z
Pontificia Universidad Javeriana
Vol. 8 No. 2 (2004): July-December
Hacia la integralidad de la enseñanza y la práctica profesional en geotecnia
Article
Rodríguez-Ordóñez, Jorge Alberto; Pontificia Universidad Javeriana
2020-11-02
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/899
Geotechnical practice
geotechnical teaching
Water balance (Hydrology)- Sabana de Bogotá (Colombia)
es_ES
The practice of today’s geotechnical engineering faces the challenge of providing practical solutions to problems with ever increasing technical difficulty, with every time more restricted financial resources. This requires better and effective engineering. The professionals have to be prepared for an international market, but the time for its basic formations is being reduced. Therefore there is a need for optimizing the resources applied to the formation of the new professionals. As an alternative to these challenges, an approach based on the integration of the disciplines of geotechnical engineering is presented. This approach is based on a sound mathematical formulation of the mechanics of the geotechnical problems to be solved by modern techniques. This is complemented by an increasingly profound and integrated knowledge of the earth materials in our country. Examples opportunities for the application of this approach in the geotechnical engineering practice in Bogotá are presented.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/900
2021-04-13T20:58:05Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/900
2021-04-13T20:58:05Z
Pontificia Universidad Javeriana
Vol. 9 No. 1 (2005): January-June
Diseño de un modelo de inventarios para la operación logística de una compañía farmacéutica
Article
Aguirre-Mayorga, Hugo Santiago; Pontificia Universidad Javeriana
Franco-Téllez, Carolina; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/900
inventory optimization
forecasting
logistics
pharmaceutical industry
es_ES
In this paper the problems encountered in the supply and demand planning process in a multinational pharmaceutical company in Bogotá, Colombia, are analyzed. It begins with a qualitative diagnosis of the key process logistics indicators in order to analyze and propose an inventory model as the result of the use of the heuristic proposed by Hopp, Spearman y Zhang [1997] with the intention to adapt it to the politics and conditions of an specific firm. Finally, the results of the application of the model to pilot data are presented showing an important reduction in inventories and increases in the service level.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/901
2021-04-13T20:58:05Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/901
2021-04-13T20:58:05Z
Pontificia Universidad Javeriana
Vol. 9 No. 1 (2005): January-June
Implantación y evolución de un humedal artificial de flujo subsuperficial en Cogua, Cundinamarca, Colombia
Article
Lara Borrero, Jaime Andrés; Pontificia Universidad Javeriana
Vera-Puerto, Ismael Leonardo; Universidad Francisco de Paula Santander Ocaña
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/901
constructed wetlands
wastewater nutrients
agricultural irrigation
es_ES
The subsurface flow constructed wetlands are considered an economic technology to treat domestic wastewater. They represent an interesting potential of application to the Colombian conditions. This article presents the functioning of this particular type of wetlands, during its initial stages, based on the experience obtained from one designed for the “Estación Experimental Javeriana”, located in Cogua, Cundinamarca. The designed wetland treats used water from houses and school facilities. The article presents a comparison between the results obtained experimentally and those pre-established by diverse design models. It is found that the Model from Reed et al, shows the best adjustment to the experimental results. This information will be the basis to the adaptation of this technology for the specific Colombian conditions.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/902
2021-04-13T20:58:05Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/902
2021-04-13T20:58:05Z
Pontificia Universidad Javeriana
Vol. 9 No. 1 (2005): January-June
Percepciones de los alumnos de ingeniería de una universidad mexicana del desarrollo de sus competencias y valores
Article
Solis-Carcaño, Rómel; Universidad Autónoma de Yucatán
Arcudia-Abad, Carlos Enrique ; Universidad Autónoma de Yucatán
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/902
engineering education
competencies
values
es_ES
In executing his duties an engineer must have intellectual, technical, and humanistic competencies. Within the humanistic competencies the ethical values play an important role. This work is a case study done in Mexico, its objective was to investigate the perception of the students about the development of their three types of competencies, and their values as well as their perceptions about the competencies and values of the engineers in service, either those that have been their professors, or those that practice the profession in other areas different of teaching. The study was exploratory and gathered the opinions of three types of students: those starting their studies of engineering, those ending their studies of engineering and those beginning a degree program. A questionnaire with scales was used, and the profiles of the perceptions of the competencies and the values were obtained. Accordingly to the results, the bachelor degree students seem not to have a clear perception that they are developing their competencies and values.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/903
2021-04-13T20:57:44Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/903
2021-04-13T20:57:44Z
Pontificia Universidad Javeriana
Vol. 9 No. 2 (2005): July-December
Interacción hombre-máquina usando gestos manuales en texto real
Article
Balsero, Nelson; Pontificia Universidad Javeriana
Botero, Diego; Pontificia Universidad Javeriana
Zuluaga, Juan; Pontificia Universidad Javeriana
Parra-Rodríguez, Carlos Alberto; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/903
recognition and interpretation of images
humanmachine interaction in real time
Blackfin 533 processor
es_ES
In this paper we present the development of an electronic system able to recognize, in real time, a set of twelve manual gestures carried out by a person with one of his hands in a controlled illumination and background scene. The implemented system shows rotational, translational and scale change robustness. The system is intended to evaluation platform ADSP Blackfin 533 Ez Kit Lite. As a final step, in the Blackfin’s platform, we propose a view option in a display of the associated letter to the recognized gesture. In the personal computer we present an illustration tool intended to show the results in different steps of the proposed algorithm. We obtained an efficient system for human machine interaction and future applications intended to enable the interaction of deaf and mute people with the population in general.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/904
2021-04-13T20:57:44Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/904
2021-04-13T20:57:44Z
Pontificia Universidad Javeriana
Vol. 9 No. 2 (2005): July-December
Sistemas tenségricos: nuevas alternativas para la robótica
Article
Vásquez, Rafael Esteban; Universidad Pontificia Bolivariana
Correa, Julio César; Universidad Pontificia Bolivariana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/904
Robotics
tensegrity systems
domotics
es_ES
In this article an introduction to the tensegrity systems is shown. It is also stated some definitions and the notation used for the elements of this kind of structures. The two morphologies more frequently used in the field of robotics and some applications used around the world are described: geodesic domes, tensegrity masts for space applications, tensegrity robot, sensors and actuators. The Automatic and Design research group (A+D), has accumulated important experience with this kind of systems. The group has developed projects, generated theories and proposed methodologies for the design and analysis of mobile applications based on tensegrity systems. The objective of these studies is to introduce this topic, which illustrates new alternatives for the robotics, in Colombia.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/905
2021-04-13T20:57:44Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/905
2021-04-13T20:57:44Z
Pontificia Universidad Javeriana
Vol. 9 No. 2 (2005): July-December
Sistema de visión por computadora para la medición de distancia e inclinación de obstáculos para robots móviles
Article
González-Vargas, Nestor Andrés; Universidad Autónoma de Occidente
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/905
Laser array
distance measurement
image processing
es_ES
This article shows the implementation process of a computer vision system for mobile Robots, which is based on a geometrical approximation of distance measurement and obstacle inclination. The system is mainly composed for a CCD camera, an image acquisition card, and a laser array, which projects two spot lights on to the obstacle.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/906
2021-04-13T20:57:44Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/906
2021-04-13T20:57:44Z
Pontificia Universidad Javeriana
Vol. 9 No. 2 (2005): July-December
Análisis de interacción suelo-estructura para refuerzo de suelos fisurados
Article
Rodríguez-Ordóñez, Jorge Alberto; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/906
Soil-Structure Interaction
Fissured soils
Finite Elements
es_ES
The paper presents results of soil-structure interaction analysis for foundations on soft fissured clay in the Bogotá Sabana. A foundation system based on soil-cement-lime columns used as soil reinforced was considered. An axisymmetric finite element model was used to represent the soil inclusions as well as the open cracks and fissures present in the soil due to desiccation. The effects of the soil inclusions on bearing capacity and deformations were studied. Soil data was obtained from a soils study carried out for a large electrical sub station located in Tenjo, Cundinamarca. The results are consistent with the observed behaviour of the fissured soils in the region. The methodology developed is suitable for analysis and design of efficient foundation alternatives on fissured soft soils.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/907
2021-04-13T20:57:44Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/907
2021-04-13T20:57:44Z
Pontificia Universidad Javeriana
Vol. 9 No. 2 (2005): July-December
Propuesta de estrategias pedagógicas y evaluativas adaptadas al sistema de créditos académicos para la asignatura de inferencia estadística
Article
Alvarado-Valencia, Jorge Andrés; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/907
academic credit system
self-learning
new teaching methodologies
mathematics teaching
es_ES
In 2004 the Pontificia Universidad Javeriana was gradually introducing academic credit system for their study programs. In order to be prepared for this challenge, it was tried a programme to adapt a statistical inference course –attended by industrial engineers– during the first term of 2004 under such credit system. The proposal was intended to promote student self-learning, and was based on the following methodology tools: the so-called teacher-made class notes, to replace notes taken by the student; self-learning guides to be used for homework; improved evaluation system which included: self-learning evaluation on fixed dates, knowledge evaluation on flexible dates including the chance of attending the exam more than once, and projectbased evaluation focused on Colombian problems and interdisciplinary dialogue. Results gave clues to make the following conjectures: using a text written by the teacher instead usual student notes reduce the necessary classroom time; using self-learning guides makes easy student homework; given their previous study habits, it’s difficult for students to adapt themselves to self-learning; flexible evaluation allows the student to take responsibility about evaluations decisions and study pace; although a single exam repetition seems to improve academic performance, it’s not clear the benefit of allowing repetitions more than once; project-based evaluation focused on Colombian problems and interdisciplinary dialogue as a learning tool is well-evaluated by students and teachers.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/908
2021-04-13T20:56:52Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/908
2021-04-13T20:56:52Z
Pontificia Universidad Javeriana
Vol. 10 No. 1 (2006): January-June
Efecto de la presión de contacto y la temperatura en el ahuellamiento de una mezcla asfáltica
Article
Reyes-Ortiz, Oscar Javier; Universidad Militar Nueva Granada
Reyes-Lizcano, Fredy Alberto; Pontificia Universidad Javeriana
Troncoso-Rivera, Juan Ricardo; Universidad Militar Nueva Granada
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/908
Marshall test
rutting
temperature effect
contact pressure
asphalt mixture
es_ES
The aim of the associated research was determining the effect of the contact pressure and the temperature in the rutting of a closed asphalt mixture, with gradation measured between 0-10 mm, with asphalt CA 60/70, compared with the standardized test at 0,9 Mpa and 60ºC. The research starts with the characterization of the granular material and the asphalt, followed by the determination of the optimal percentage of asphalt by means of the Marshall test and ended with the execution of rutting tests, varying the contact pressure from 0,18 Mpa to 0,9 Mpa, in increments of 0,18 Mpa and the temperature from 40ºC to 70ºC, in increments of 10ºC. The results indicate that there is an effect of the contact pressure and the temperature in the permanent deformation; the above mentioned effect is adjusted to an exponential function in both evaluated variables.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/910
2021-04-13T20:56:52Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/910
2021-04-13T20:56:52Z
Pontificia Universidad Javeriana
Vol. 10 No. 1 (2006): January-June
Comportamiento mecánico y dinámico de una mezcla asfáltica con adición de cenizas volantes
Article
Reyes Ortiz, Oscar Javier; Pontificia Universidad Javeriana
Troncoso Rivera, Juan Ricardo
Camacho Tauta, Javier Fernando
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/910
Asphalt mixture
flying ashes
stability-fluency relation
permanent deformation
es_ES
The main objective of the associated research was determining the effect on the permanent deformation and the mechanical properties of an asphalt mixture with gradation 0/10 and asphalt 60/70 when the mineral filler is replaced by flying ashes. Characterization of granular, asphalt and flying ashes was initially performed. The design of the asphalt mixture follows the methodology proposed by Marshall; the samples for the mechanical tests and rutting with replacement of mineral filler for flying ash were constructed with the value determined with that method. The percentages used as replacement of mineral filler for flying ash vary between 15% and 100 %. The results show a positive effect of the replacement of the mineral filler for flying ashes. The resistance increases in 19% on average with a percentage of replacement of 20%. The permanent deformation, decreases in 10% and 38% for the replacement of 20 % and 45%, respectively. In addition, Marshall Stiffness and deformation velocity were evaluated; as a result, a positive percentage addition of flying ash of 25% with respect of the mineral filler weight was reached.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/911
2021-04-13T20:56:52Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/911
2021-04-13T20:56:52Z
Pontificia Universidad Javeriana
Vol. 10 No. 1 (2006): January-June
Evaluación por confiabilidad estructural de puentes en acero apoyada en monitoreo e instrumentación
Article
Muñoz-Díaz, Edgar Eduardo; Pontificia Universidad Javeriana
Núñez, Federico; Pontificia Universidad Javeriana
Rodríguez-Calderón, Wilson; Pontificia Universidad Javeriana
Otálora-Sánchez, Camilo; Pontificia Universidad Javeriana
Ruiz-Valencia, Daniel Mauricio; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/911
Reliability
monitoring
simulation
bridges
es_ES
This paper shows a reliability analysis evaluation of the main frames of one of the most important Colombian bridges. The evaluation was carried out by employing the following techniques: geometrical detailing, mechanical tests, traffic counting, load deformation tests, structural calibration of the bridge model, instrumentation, electrical monitoring and numerical simulation. The monitoring procedure was implemented by a series of electronic sensors connected to the main frame bridge structure in multiple locations to measure and record data from the strain gages sensors. The purpose for employing the monitoring procedure described above was to compile real-time data to compare them with the design load (C-40-95) established by the Colombian Seismic Code of Bridges Design. Overloads were found in some of the monitored frames. This fact compromises the bridge’s safety and stability and must be controlled immediately. Additionally, probability failure calculations were carried out and the results were that the structure safety ranges that assure stability and a lower risk condition were not found.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/912
2021-04-13T20:56:52Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/912
2021-04-13T20:56:52Z
Pontificia Universidad Javeriana
Vol. 10 No. 1 (2006): January-June
Redes de petri y algoritmos genéticos, una propuesta para la programación de sistemas de manufactura flexible
Article
Caballero-Villalobos, Juan Pablo; Pontificia Universidad Javeriana
Mejía, Gonzalo; Universidad De Los Andes
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/912
Petri Networks
production programming
genetic algorithms
lexible manufacturing systems
active schedules
weighted tardiness
es_ES
This paper uses the Petri networks and genetic algorithms strengths for modelling and solving manufacturing systems and combinatorial problems, respectively. This article generates active schedules for flexible manufacturing systems that minimize weighted tardiness. The algorithm works for problems involving aspects such as: setups dependent on the operations sequences, stations with non identical parallel machines and stations buffers with finite capacity. Some of the obtained computational results make as believe it could be considered as a promise field for future works.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/913
2021-04-13T20:56:52Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/913
2021-04-13T20:56:52Z
Pontificia Universidad Javeriana
Vol. 10 No. 1 (2006): January-June
Procedimiento jerárquico basado en optimización y simulación para la gestión de vehículos en sistemas automatizados de manufactura
Article
Montoya-Torres, Jairo Rafael; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/913
Automated transport
vehicle management
optimization
simulation
semiconductor manufacturing
es_ES
This paper focuses on the analysis of transport strategies in Automated Material Handling Systems (AMHS) for automated manufacturing systems. The problem studied is inspired from an application found in the semiconductor industry. A difference against previous work is that our approach takes into account the unified nature load transport moves that, in the past, have limited the practical usefulness of the results provided. In a unified AMHS, vehicles can travel along the whole network path to deliver loads directly from one machine to another machine (tool-to-tool delivery) without passing by intermediate storage. Since the number of vehicles is limited, an intelligent strategy has to be implemented in order to distribute them so as to optimally satisfy transport requests during the production horizon. The problem is addressed by means of a hierarchical tactical planning-operational control approach using simulation-optimization. At the tactical, vehicles are distributed on the network path by integer linear programming. The tactical solution is then implemented on a detailed simulation model of the factory in order to analyze factory dynamics. Experimental results show the improvement of performance indexes that can be achieved by implementing the proponed procedure.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/914
2021-04-13T20:56:52Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/914
2021-04-13T20:56:52Z
Pontificia Universidad Javeriana
Vol. 10 No. 1 (2006): January-June
Herramientas de aprendizaje activo en las asignaturas de ingeniería estructural
Article
Ruiz-Valencia, Daniel Mauricio; Pontificia Universidad Javeriana
Magallón-Gudiño, José; Pontificia Universidad Javeriana
Muñoz-Díaz, Edgar Eduardo; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/914
Active learning tools
structural engineering
structural models
engineering education
es_ES
The educational methods that promote active learning are based on the constructivist theory on learning. According to this theory the students are the core and the protagonists of the educational process, and they decide when and how to learn. In this process the professor is only a guide who motivates and gives feedback to the students. With this purpose in the Structural Engineering courses offered to the students of the civil engineering and architecture undergraduate programs at the Javeriana University, tools of active learning have been implemented. These tools have been related, in some cases, with examples of applied research of the research group Estructuras. In small workgroups students experiment with existing structural models of the structural lab and with models designed and constructed by themselves. As a consequence of these activities, the motivation and enthusiasm of the students have increased as well as the class attendance. Additionally, during the execution of the experiments a constant interest is observed and the students participate actively and formulate questions related to the behavior of the structural systems modeled.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/915
2020-11-02T00:14:49Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/915
2020-11-02T00:14:49Z
Pontificia Universidad Javeriana
Vol. 10 No. 2 (2006): July-December
Análisis espectral de propagación de ondas para análisis de pruebas de integridad de pilotes
Article
Rodríguez-Ordóñez, Jorge Alberto; Pontificia Universidad Javeriana
Restrepo-Botero, Víctor Hugo; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/915
wave propagation
spectral analysis
pile integrity test
es_ES
An analytical solution is obtained for the problem of wave propagation along a concrete pile. The problem consider a longitudinal element with a piece wise varying section, friction forces along the element and a reaction force at the tip, with a transient stress pulse applied at the top. This problem is representative of low strain pile integrity tests. Different alternatives for the solution of the problem were considered, and the spectral analysis method was chosen and implemented using Matlab. The test was modeled for several cases, comparing the results with actual PIT measurements. The parameters for the analytical model were obtained from numerical models of soil-pile interaction.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/916
2020-11-02T00:28:17Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/916
2020-11-02T00:28:17Z
Pontificia Universidad Javeriana
Vol. 10 No. 2 (2006): July-December
Estudio de algoritmos dinámicos para el problema de secuenciación de trabajos en una máquina simple
Article
Montoya-Torres, Jairo Rafael; Pontificia Universidad Javeriana
Rodríguez-Verján, Gloria; Pontificia Universidad Javeriana
Merchá- Alba, Liliana; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/916
On line scheduling
dynamic algorithms
competitiveness of scheduling rules
es_ES
Classical scheduling theory has traditionally considered the study and evaluation of scheduling algorithms based on the hypothesis of perfect advanced knowledge of the information needed to used in an off-line context. Recently, a great interest has been dedicated to the study of on-line scheduling algorithms, which make sequencing decision on real-time, knowing only the information about jobs already arrived at the decision time. This paper considers the problem of scheduling on-line jobs on a single machine environment, and studies the well-known SPT (Shortest Processing Time) and FIFO (First In, First Out) scheduling rules in an on-line context. The study of these two rules is first presented from the theoretic stand point by analyzing their worst-case competitiveness. Afterwards, the algorithms are compared from the practical point of view by a complete set of simulation experiments.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/917
2020-11-02T00:36:23Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/917
2020-11-02T00:36:23Z
Pontificia Universidad Javeriana
Vol. 10 No. 2 (2006): July-December
Enfoques teóricos para definir el caudal ambiental
Article
Castro-Heredia, Lina M.; Universidad del Cauca
Carvajal-Escobar, Yesid; Universidad del Valle
Monsalve-Durango, Elkin A.; Universidad del Valle
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/917
water resources
environmental flow
environmental flow regime
es_ES
The economic development of the nations has evolved around the use of water resources. This situation has caused alterations in the natural course of rivers and changes in the fluvial ecosystems as a result of the huge pressure put on them. Another consequence is the serious limitations in the capacity of the ecosystems to provide goods. The growing awareness about the damages causes to the freshwater systems has led to the development of the methodologies for determining the water level that should remain in the river for keeping the harmony of the environment. The aim of this paper is to review the methodologies that are frequently more used for measuring the environmental flow and the environmental flow regime. The methodologies are revised from different perspectives: hydrological, hydraulic, hydraulic of habitat simulation or holistic. Within every presented perspective, the former approaches involve from simply hydrological procedures to complex technological tools, with hydrological, hydraulic and biological information, and also takes into account the economic and social components. The purpose is to obtain a regime flow with a holistic and integral vision. A brief explanation of each one of the methods and its more outstanding characteristics are made and some conclusions and recommendations are given.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/918
2020-11-08T05:41:43Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/918
2020-11-08T05:41:43Z
Pontificia Universidad Javeriana
Vol. 10 No. 2 (2006): July-December
Servicio de interacción con voz para correos electrónicos a través de redes móviles
Article
Castellanos, Germán Darío; Escuela Colombiana de Ingeniería
Licero, José Fernando; Escuela Colombiana de Ingeniería
Teuta, Guillermo; Escuela Colombiana de Ingeniería
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/918
telecommunications
value added services
phone networks
electronic mail
es_ES
The article deals about the design of a new service for the e-mail administration through voice, for any kind of mobile or fixed phone, and the discussion of the results obtained on the industrial prototype. This service is very innovative for Colombia and for the Latin American region, focused on marketing sectors like: high mobility executives, blind people, handicapped or one handed people and commercial services drivers.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/919
2020-11-02T02:29:03Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/919
2020-11-02T02:29:03Z
Pontificia Universidad Javeriana
Vol. 10 No. 2 (2006): July-December
Seguridad y salud en la construcción masiva de vivienda en México: caso de estudio
Article
Solís-Carcaño, Rómel; Universidad Autónoma de Yucatán
Arcudia-Abad, Carlos Enrique ; Universidad Autónoma de Yucatán
Campos-Castro, Carlos; Universidad Autónoma de Yucatán
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/919
Construction projects
industrial safety
occupational health
es_ES
This paper presents the results of a study about the safety and health conditions that were observed in the construction site of an important housing development located in Southeast Mexico. The methodology was based on the observation of constructive processes and site general conditions, in order to identify possible unsafe construction practices and not healthy working conditions. The results showed the presence of a varied frequent risk factors. The legal frame was also analyzed, and according to the data, the firm was making many omissions in providing safety and health conditions to workers.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/920
2020-11-02T02:49:18Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/920
2020-11-02T02:49:18Z
Pontificia Universidad Javeriana
Vol. 10 No. 2 (2006): July-December
Diseño e implementación de una red domótica para un laboratorio de ingeniería electrónica
Article
Paz-Penagos, Hernán; Escuela Colombiana de Ingeniería Julio Garavito
Castellanos, Germán Darío; Escuela Colombiana de Ingeniería Julio Garavito
Alarcón-Ballesteros, Ronald Ferney; Escuela Colombiana de Ingeniería Julio Garavito
Weiss-Velandia, Viviana Lucía; Escuela Colombiana de Ingeniería Julio Garavito
Laverde-Cañón, Ángela Rocío; Escuela Colombiana de Ingeniería Julio Garavito
Rodríguez-Calderón, Juan Carlos; Escuela Colombiana de Ingeniería Julio Garavito
Rincón-Fonseca, Leonel Andrés; Escuela Colombiana de Ingeniería Julio Garavito
2020-11-01
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/920
Electric net
data transmission
domotics
es_ES
The increase of users –students and teachers– in the laboratories of the Escuela Colombiana de Ingeniería Julio Garavito in the last time, has congested the access to those laboratories. The proposal formulated by the research group Ecitrónica seeks to take advantage of a electric distribution net in the campus in order to create a domotic net that offers access facilities, control of the equipments of the laboratory, saving of energy and improvement of the quality of service for the students. The research group applied the Power Line Communications technology (PLC) and explored better alternatives of digital modulation, codification and detection of mistakes, connect, protocols of transmission of information and new applications; all that was based on the estimation of the channel (spread electric) like conduit. This project facilitates the development of research skills of teachers and students. The research meant an advance in the application of new technologies of communications for the solution of a need of the program of Electronics Engineering of the ECI. In this paper we present the concepts and basic beginning of the system of transmission of information across the electrical net of low tension of the laboratory of electronics in the campus.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/921
2020-11-01T22:23:29Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/921
2020-11-01T22:23:29Z
Pontificia Universidad Javeriana
Vol. 11 No. 1 (2007): January-June
About spatial filtering responses of the bouguer gravity anomalies map of the North of Morocco
Article
Bakkali, Saad; Mohammadia School of Engineers
Amrani, Mahacine; Mohammadia School of Engineers
Bahi, Lahcen; Mohammadia School of Engineers
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/921
Gravity anomalies — Morroco
spatial filtering
Fourier series
es_ES
This paper reports the results and interpretations of gravity signatures of the transformed map of Bouguer gravity anomalies of the Tangier-Tetuan area according with the data provided by aerial and terrestrial gravimetric surveys carried out in that area. Filtering analysis based on classic signal process was applied. Operators signal process like vertical gradient, horizontal gradient and downward continuation were used. This study also brings the possibility to define other adequate methods under consideration for the analysis of the gravity of the Tangier-Tetuan area.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/922
2020-11-01T22:29:57Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/922
2020-11-01T22:29:57Z
Pontificia Universidad Javeriana
Vol. 11 No. 1 (2007): January-June
Reed-solomon digital encoder/decoder for reconfigurable hardware
Article
Sandova- Ruiz, Cecilia ; Universidad de Carabobo
Fedón, Antonio; Universidad de Carabobo
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/922
Reconfigurable hardware
Reed-Solomon codes
digital communication
es_ES
In this paper we present theory bases for Reed-Solomon Coders/Decoders building blocks, and a methodology to the basicoriented design of Field Programmable Gate Arrays (FPGA). Initially, the design of the Coder at the software level is presented, later the architecture and captures using VHDL, with Xilinx ISE 6.1 are showed. Finally, the simulations using ModelSim 5.7 are carried out. The operations in finite or Galois fields, GF(2m), are the fundamentals for several algorithms in the fields of error-correction codes and digital signal processing. Nevertheless, the calculations involved are time-consuming, especially when they are performed by software. Due to performance and security reasons, it is rather convenient to implement algorithms by hardware.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/923
2020-11-01T22:38:33Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/923
2020-11-01T22:38:33Z
Pontificia Universidad Javeriana
Vol. 11 No. 1 (2007): January-June
Quality control station via artificial vision for a computer integrated manufacturing center (CIM)
Article
Zambrano-Rey, Gabriel Mauricio; Pontificia Universidad Javeriana
Parra-Rodríguez, Carlos Alberto; Pontificia Universidad Javeriana
Manrique-Torres, Martha Ruth; Pontificia Universidad Javeriana
Bustacara-Medina, César Julio; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/923
Digital image processing
metrology
quality control
flexible manufacturing systems
es_ES
In this paper, the development, implementation, construction and validation of a quality control station targeted to the inspection and verification of fabrication qualities of machined parts, based on artificial vision and coupled to a computer integrated manufacturing system is presented. The system analyses the parts based on a template configured previously with a pattern. The template is applied later to each one of the images taken from the batch to be inspected. By taking into account the importance of metrology and quality control in manufacturing processes the main objective of this work was to provide the Laboratory of Industrial Automation with a measurement tool that allows inspection tasks to be executed during a process plan in a Computer Integrated Manufacturing System.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/924
2020-11-01T22:45:06Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/924
2020-11-01T22:45:06Z
Pontificia Universidad Javeriana
Vol. 11 No. 1 (2007): January-June
Migrating from flexible manufacturing system (FMS) to computer integrated manufacturing center (CIM)
Article
Fúquene-Retamoso, Carlos Eduardo; Pontificia Universidad Javeriana
Aguirre-Mayorga, Hugo Santiago; Pontificia Universidad Javeriana
Córdoba-Pinzón, Nazly Bibiana; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/924
Enterprise Resource Planning
Computer Integrated Manufacturing Systems
Production Management
Flexible Manufacturing Systems
es_ES
The development of machines tools, elements for process control, robots, computers and communications networks have transformed existing ways of manufacturing into integrated and versatile manufacturing systems. Those industries that need to maintain their position in a competitive level, at the currently information and trade globalization era, are being forced to introduce advanced production technologies achieving flexible manufacturing systems capable of managing transversals company’s processes. This paper shapes the evolution of a Flexible Manufacturing System (FMS) towards a Computer Integrated Manufacturing System (CIM) trough the integration process of two systems, a FMS and an Enterprise Resource Planning (ERP), using a middle tear interface with the purpose of automating the process of sending and receiving production information, to guarantee transparency of data and achieve processes improvement.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/925
2020-11-01T23:16:43Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/925
2020-11-01T23:16:43Z
Pontificia Universidad Javeriana
Vol. 11 No. 1 (2007): January-June
Computer simulation model for the construction process of prefab flagstone L-18
Article
Sosa-Canto, Jorge Alejandro; Universidad Autónoma de Yucatán
Baeza-Pereyra, Julio Rodrigo; Universidad Autónoma de Yucatán
Arcudia-Abad, Carlos Enrique ; Universidad Autónoma de Yucatán
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/925
industrialized building
computer simulation
digital computer simulation
constructive process
es_ES
The constant development in the construction industry demands the continuous study of new constructive alternatives to allow the most efficient and effective use of the resources. The present work is aimed to elaborating graphical models for operation processes in manufacturing of the L-18 precast slab system. The activities of this construction system were observed and analyzed and grouped in individual processes, which were the basis to elaborate a simulation model. The activities registered for the creation of this model were solely based on the assembly operations. The characteristics of the observed project that used this system are described and taken into account for the simulation of the construction system.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/926
2020-11-01T23:25:00Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/926
2020-11-01T23:25:00Z
Pontificia Universidad Javeriana
Vol. 11 No. 1 (2007): January-June
Parallel compression resistance of bamboo fiber angustifolia and determination of the elasticity module
Article
Takeuchi-Tam, Caori Patricia; Universidad Nacional de Colombia
González, César Emilio; Investigador Independiente - Colombia
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/926
bamboo construction
strength of materials
compression testing
es_ES
The chapter E-7 of the Colombian Seismic Design and Construction Code contemplates the construction of one or two floors houses using guadua or wood covered by cement mortar. However, the guadua is used as construction material in elements of trusses and frames for structures of roofs, bridges and buildings and there is not a design code that contemplates the guadua as structural material. In order to have design values in this matter, the research group GIES of the Universidad Nacional de Colombia, has carried out studies about shear strength parallel to the fiber and tension strength perpendicular to the fiber. As continuation of those studies in the year 2006 those mechanical properties were determined conducting a wide number of tests with Guadua angustifolia from the Colombian departments of Quindío and Caldas. In this paper the results obtained in those test referred to the compression strength parallel to the fiber, the allowable value for compression strength under different load combinations and the elasticity module for the Guadua angustifolia are presented.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/927
2020-12-10T04:42:47Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/927
2020-12-10T04:42:47Z
Pontificia Universidad Javeriana
Vol. 11 No. 2 (2007): July-December
Seismic vulnerability rate in masonry buildings based on experts’ opinion
Article
Maldonado-Rondón, Esperanza; Universidad Industrial de Santander
Chio-Cho, Gustavo; Universidad Industrial de Santander
Gómez-Araujo, Iván; Universidad Industrial de Santander
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/927
Seismic vulnerability
fuzzy set
masonry
es_ES
The aim of this paper is to develop a simple model to assess seismic vulnerability of masonry buildings to regional scale. This model was especially made for areas where current reposts of seismic damages of masonry buildings do not exist. The method is based on the identification of the most influential characteristics associated with the damage in a masonry building under the action of an earthquake. The evaluation of these characteristics was carried out by means of the determination of eleven parameters. A vulnerability degree and an importance value based on the opinion of experts was assigned to each of the 11 parameters. Due to the imprecision and subjectivity of the opinions, these data were processed by using fuzzy techniques. Once each one of the parameters was qualified, the qualifications of the parameters were related to their value of importance by means of a fuzzy weight average. The result of this relationship, according to techniques based on fuzzy set, is the masonry building vulnerability index.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/928
2020-10-31T06:21:06Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/928
2020-10-31T06:21:06Z
Pontificia Universidad Javeriana
Vol. 11 No. 2 (2007): July-December
Analysis of the seismic resistance of a low-weight prefabricated structural system for home building
Article
Ruiz-Valencia, Daniel Mauricio; Pontificia Universidad Javeriana
Ochoa-Sánchez, Ángela María; Metecno de Colombia
Castillo-Castillo, Germán Daniel; Pontificia Universidad Javeriana
Robles-Romero, Andrés Leonardo; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/928
Construction prefabriquee
earthquakes and building
earthquake resistant structures
light weight structures
es_ES
Near of the 75% of the attributed deaths to earthquakes in Colombia, were caused by the collapse of heavy constructions. That’s why it is necessary to study new technological alternatives in structural systems for houses of one story, that are able to support the seismic forces. These new structural systems must be resistant, durable, light and with low costs. A Colombian enterprise has developed a prefabricated system conformed by self-supporting panels (foam and coworkers-laminae of steel) that has been used for non-structural elements. Nevertheless the low weight of the panels and the high resistance of its the coworkers-laminae of steel, have suggested that this system could be the structural system of one story houses. For the previous reasons, a research program was developed in Colombian universities to evaluate the seismic behavior of the prefabricated system. The experimental program included standard test for evaluate the strength and ductility of the system and its components. Additionally, a three dimensional finite element model of one story house was developed to study the stresses and displacements caused by the seismic loads established in the Colombian code for earthquake design and construction. This stresses and forces were compared with the ones determined experimentally. In agreement with the results, the structural system would have an excellent behavior to seismic loads due to his low weight and high resistance.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/929
2020-11-08T05:22:43Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/929
2020-11-08T05:22:43Z
Pontificia Universidad Javeriana
Vol. 11 No. 2 (2007): July-December
Using rainwater for irrigation, hard furface & façade cleaning at Pontificia Universidad Javeriana’s campus (Bogota)
Article
Lara-Borrero, Jaime Andrés; Pontificia Universidad Javeriana
Torres-Abello, Andrés Eduardo; Pontificia Universidad Javeriana
Campos-Pinilla, María Claudia; Pontificia Universidad Javeriana
Duarte-Castro, Leonardo; Pontificia Universidad Javeriana
Echeverri-Robayo, Jairo Iván; Pontificia Universidad Javeriana
Villegas-González, Paula Andrea; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/929
Water-supply rain
water supply systems
sprinkler systems (irrigation)
es_ES
Rainwater collection for domestic uses represents an interesting practice from the economical and environmental point of view. However, this solution is adopted due to the threat of the scarcity of water resources; it is not neutral from a sanitary perspective. This paper presents an analysis of the economical and technical viability of the its use as an alternative for irrigation purposes, as well as cleaning of facades and hard areas in the campus of the Pontificia Universidad Javeriana (Bogota, Colombia). Three main aspects are developed in the paper: (i) estimation of the available rainwater volumes and the possible collection points; (ii) preliminary quality analysis of the collected rainwater; (iii) estimation of the construction costs for the basic infrastructure required to collect rainwater and estimation of the monetary savings obtained with the proposed solution. The results suggest that the use of rainwater is economically and technically viable, and that it may contribute with a sustainable management and development of the University’s campus.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/930
2020-11-01T21:07:10Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/930
2020-11-01T21:07:10Z
Pontificia Universidad Javeriana
Vol. 11 No. 2 (2007): July-December
Production programming in manufacturing systems (workshop type) with a combined mobile bottleneck and taboo search algorithm
Article
Britto-Agudelo, Rodrigo Alberto; Universidad De Los Andes
Mejía-Delgadillo, Gonzalo; Universidad De Los Andes
Caballero-Villalobos, Juan Pablo; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/930
Flexible manufacturing systems
production scheduling
algorithms
es_ES
Job Shop Scheduling has many applications in real production systems such as metal machining, printing, and textiles, among others. Commonly, in these manufacturing systems the main objective is the delivery of the jobs on time. In this research we present a hybrid approach that uses the Shifting Bottleneck (SB) and Tabu Search (TS) heuristics with the purpose of minimizing the Total Weighted Tardiness. The Shifting Bottleneck algorithm provides a feasible initial solution which is iteratively improved by the TS method. Additionally, several improvements were performed on the classical algorithms SB and TS such as new criteria for the selection of the critical machines and a number of innovative strategies of diversification and intensification. The performance of the proposed heuristic algorithm denominated CBBT was evaluated with 17 classical problems found in the literature. The implemented heuristic algorithm shows very competitive results compared with other approaches found in literature both in quality of the solutions and computational time.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/931
2020-11-08T05:26:48Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/931
2020-11-08T05:26:48Z
Pontificia Universidad Javeriana
Vol. 11 No. 2 (2007): July-December
The use of multi-criteria methods to improve the management of power switch maintenance
Article
Gondres-Torné, Israel; Universidad de Camagüey
Lajes-Choy, Santiago; Universidad de Camagüey
Hidalgo-Hidalgo, Héctor; Universidad de Camagüey
Del Castillo-Serpa, Alfredo; Instituto Superior Politécnico José Antonio Echeverría
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/931
High voltage circuit breakers —maintenance and repair
electric power distribution
quality control
finite difference method
es_ES
This paper is about the use of multi-criterial methods with the objective of improving the electric power supply by means of the selection of the best high voltage breaker maintenance variant. These different variants are analyzed based on the diagnostic maintenance system and they can be valued bearing in mind the criteria use by the manufactures, the experts, historical data of accumulated currents, the costs of partial or capital repairs, etc., with the objective of having high voltage breaker with minimum failure averages and increase their dependability, that which would bear a better quality in the electric power supply.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/932
2020-11-01T21:59:38Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/932
2020-11-01T21:59:38Z
Pontificia Universidad Javeriana
Vol. 11 No. 2 (2007): July-December
Analysis of a wireless communication system in a shopping mall through discrete event simulation
Article
Páez-Rueda, Carlos Iván; Pontificia Universidad Javeriana
2010-10-26
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/932
Discrete-time systems —mathematical models
wireless communication system
system analysis
es_ES
In the present paper the analysis of wireless communications systems in a shopping mall is presented. By means of the discrete events simulation technique, a model of the system is proposed; it is implemented and the design parameters are obtained. The results allow to determine the blocking probability and the dropping probability, in function of traffic offered by cell, the mobility of subscribers, the model of radio frequency channel and other typical parameters.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/934
2020-11-08T04:55:50Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/934
2020-11-08T04:55:50Z
Pontificia Universidad Javeriana
Vol. 12 No. 1 (2008): January-June
A greedy procedure for vehicle positioning in complex automated transportation systems used in manufacturing
Article
Montoya-Torres, Jairo Rafael; Universidad De La Sabana
2008-04-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/934
Automated Material Handling Systems
semiconductors
heuristic methods
es_ES
This paper discusses the problem of vehicle location or positioning for material handling in automated manufacturing systems. The problem is inspired by a real-life application in semiconductor manufacturing. The main difference between this paper and previous works is the consideration of the unified nature of the transport system in which vehicles can travel from one machine to another without passing through intermediate storage. Since a vehicle fleet size is limited, it is necessary to implement intelligent strategies to satisfy transportation requests. Previous Works have focused on hierarchical mathematical programming and simulation approaches. This paper studies the tactical decision level, in which, based on static demand estimates, the objective is to determine the best distribution of vehicles within the factory so as to minimize the time required to service a transport request. A greedy heuristic procedure is proposed. Experimental tests have been conducted using previous data from the literature based on a real-life automated factory. An improvement in both production metrics and computation time has been obtained.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/935
2020-10-31T04:40:35Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/935
2020-10-31T04:40:35Z
Pontificia Universidad Javeriana
Vol. 12 No. 1 (2008): January-June
Analysis of a communication system affected by flat and slow rayleigh fading
Article
Torres-Zambrano, Camilo; Pontificia Universidad Javeriana
Páez-Rueda, Carlos Iván; Pontificia Universidad Javeriana
2008-04-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/935
Light modulation
telecommunication systems
Monte Carlo methods
omputer simulation
es_ES
In this paper, we present the performance of a digital communication system made up by a modulation M-ary AQM and a channel with a flat, slow multipath fading type Rayleigh with AWGN noise limited in the band. The results found are compared with some theoretical error probabilities for this type of channel. The curves presented allowed us to find a new approach for this kind of system, which is valuable for simplified measurements of radio links.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/936
2020-10-31T04:52:37Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/936
2020-10-31T04:52:37Z
Pontificia Universidad Javeriana
Vol. 12 No. 1 (2008): January-June
Designing a proctology couch / table
Article
Manrique-Torres, Martha Ruth; Pontificia Universidad Javeriana
Lombana-Amaya , Luis Jorge; Pontificia Universidad Javeriana
Pérez-Rodríguez, Guillermo Andrés; Pontificia Universidad Javeriana
Rincón-Becerra, Ovidio; Pontificia Universidad Javeriana
2008-04-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/936
Design pulls proctológica
surgical instruments and apparatus
medical instruments and apparatus
es_ES
One of the fields of biomechanics is the construction of instruments through which we can set up the instrumentation for surgical interventions. This not only meets the concerns of surgeons, but also provides a reason for research and development in other areas such as industrial design and engineering. Accordingly, this paper presents the process of designing a table for diagnosis and surgical practice in the area of proctology, which is the result of a research project developed by three departments at Javeriana University: Productive Processes in the School of Engineering; Design in the School of Architecture and Design; and Surgery in the School of Medicine. The formal and ergonomic aspects of the design leading to the final proposal are described.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/937
2020-10-31T05:01:07Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/937
2020-10-31T05:01:07Z
Pontificia Universidad Javeriana
Vol. 12 No. 1 (2008): January-June
Simulation model for the production of traditional roof slabs in southeastern Mexico
Article
Baeza-Pereyra, Julio Rodrigo; Universidad Autónoma de Yucatán
2008-04-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/937
Trusses
slabs
computer simulation
building materials
es_ES
This article presents the process for making a mathematical model for the production of traditional roof slabs, as used in southeastern Mexico. This type of slab is the one most frequently used in large-scale affordable housing construction in this region; thus, the study of the process involved in its production is of great interest and importance, in case it should be compared with other types of construction methods. The job sampling technique was used to identify the stages of the process and their durations. A comparative table of durations was obtained and an analysis of factors under different probability distributions was performed. For each operation in the production process, the probability distribution most adequate for the population was chosen. Finally, a graphical model of operations was made using EzStrobe©. It was concluded that the large number of activities involved in this method makes its representation difficult. However, a representation of the process can be formulated for simulation purposes.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/938
2020-11-08T05:04:06Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/938
2020-11-08T05:04:06Z
Pontificia Universidad Javeriana
Vol. 12 No. 1 (2008): January-June
A Model for measuring and evaluating the usability of web sites in Colombian virtual banking services
Article
Pulido-Granados, Elkin René; Universidad Distrital Francisco José de Caldas
Medina-García, Víctor Hugo; Universidad Distrital Francisco José de Caldas
2008-04-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/938
Computer simulation
web sites
heuristic methods
ncial institutions – technological innovations
es_ES
The work here presented is the development of a model for the measurement and evaluation of the usability of web sites of the Colombian virtual bank; the methodology used was that of a heuristic evaluation by experts, which takes into account the inherent objectives of the domain and the necessities of the navigators, in addition to their profile. There are several methodologies to evaluate the usability of web sites, such as: iterative revision, ClickStream, on-line questionnaire, heuristic evaluation by experts, users’ test, cognitive walkthrough, pluralistic walkthrough, interviews with users, thinking aloud, card sorting, scientific method, ethnographic study, SUMI - QUIS, ESPRIT MUSIC, evaluation of the intercultural usability, evaluation of the accessibility, studies of documentation, and predictive system performance models. The heuristic evaluation by experts was selected due to several reasons: it is based on the evaluators’ expertise on the subject; it is an informal, easy-toapply methodology; it has low cost and concrete results; it is accurate and reliable in terms of web site usability. Evaluation results can be used to make a report that allows banks to know what is happening to users who make transactions through their Internet pages, whether the web sites efficiently satisfy their needs and objectives, and also if each site provides them with accessibility, trustworthiness and functionality.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/939
2020-10-31T02:25:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/939
2020-10-31T02:25:31Z
Pontificia Universidad Javeriana
Vol. 12 No. 2 (2008): July-December
Characterizing the admission flow in a spark ignition engine
Article
Fygueroa-Salgado, Simón; Universidad de Pamplona
Serrano, Juan carlos ; Universidad de Pamplona
Garrido, Carlos; Universidad de Pamplona
2008-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/939
Swirl hot wire anemometer
internal combustion engines
vortex flow
es_ES
The goal of this work is to characterize the gas exchange process in a spark ignition (MECH) CFR (cooperative fuels research) engine, by determining the gases’ discharge (CD) and swirl (CT) coefficients, and measuring the admitted air speed components in a simulated cylinder installed in a stationary flow bench. In order to characterize the flow macrostructure, the AVL method of Internal Combustion Engine Institute was used, and to obtain the speeds, a hot wire anemometer was employed. Utilizing the anemometer, some measurements at different points from several crosssectional planes and angular cylinder sections were made.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/941
2020-10-31T02:35:14Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/941
2020-10-31T02:35:14Z
Pontificia Universidad Javeriana
Vol. 12 No. 2 (2008): July-December
Designing a process for separating leftover metoplastic materials in the production of engine gaskets at FRACO S.A.
Article
Buitrago-Suescún, Óscar; Universidad Central
Zambrano-Gómez, Víctor; Fábrica Colombia de Repuestos Automotores (FRACO S. A.)
Zambrano-Arroyo, Daniel; Universidad de Boyacá
2008-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/941
Metoplastic materials
gaskets
metoplastic materials
es_ES
This article shows the results of the first stage of the project Contingent Recovery under a University-Company-State Cooperation framework, sponsored by Colciencias and carried out by the University of Boyacá and the Colombian Factory for Auto Parts (FRACO S.A). This project seeks alternatives for re-usage of leftover metoplastic materials from the process of producing gaskets for engines. This phase of research deals with the manner of separating the components that form these materials, with reference to two of the products called FracoPlay and FracoPack. Extensive lab work was involved, guided by a well-planned statistical design in which the separation agents were tested at different conditions of concentration and temperature. The results obtained are satisfactory and allow the beginning of the development stage of new materials from the separated ones.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/942
2020-11-08T04:49:05Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/942
2020-11-08T04:49:05Z
Pontificia Universidad Javeriana
Vol. 12 No. 2 (2008): July-December
A Grid portal model for a Grid computing lab
Article
Montañez-Torres, Sandra Neyid; Universidad Distrital Francisco José de Caldas
Pérez-Castillo, José Nelson; Universidad Distrital Francisco José de Caldas
2008-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/942
Computational laboratories
computational grids (computer systems)
Web sites
es_ES
In order to achieve significant progress in computer science, new and powerful solutions in the field of information technology are required; some of the current processes would not be possible without access to powerful computing resources. This investigation focused on creating a system for harnessing these resources in a distributed environment called a grid. The grid is based on the sharing of distributed computing resources for multiple purposes in a computational process. Currently, researchers are required to understand some advanced concepts in order to incorporate all the advantages of grid architecture. The idea throughout this project was to create a portal oriented to researchers who wish to execute tasks using distributed resources, without their having to delve into the technical details of grid technologies. The first part of this article describes the basics for grid portals and the proposed model; the article subsequently emphasizes the components of the prototype including all relevant elements for modeling the portal, such as middleware, frameworks, web server, and portlets. Following is a brief description of the results achieved throughout the project, including the satisfactory performance of the portal, with the conclusion that the execution of tasks using distributed resources through the portal takes considerably less time than with other methods, in addition to being more user-friendly. Finally some significant recommendations for future work are identified.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/943
2020-10-31T03:04:41Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/943
2020-10-31T03:04:41Z
Pontificia Universidad Javeriana
Vol. 12 No. 2 (2008): July-December
Analysis of a cellular network’s capacity by using the CDMA method in fixed wireless environments
Article
López-González, Luis Javier; Pontificia Universidad Javeriana
Páez-Rueda, Carlos Iván; Pontificia Universidad Javeriana
2008-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/943
Cellular telephone systems
code division multiple Access
discrete event systems
es_ES
The following article presents the analysis of a wireless cellular network’s capacity, typically from a fixed Wireless application environment, in which through a simulation model with discrete events, the capacity of the network is determined under nonideal conditions, represented by the power control error model and the human voice activity factor model.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/944
2020-10-31T03:14:49Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/944
2020-10-31T03:14:49Z
Pontificia Universidad Javeriana
Vol. 12 No. 2 (2008): July-December
Assessing business process maturity in medium-sized Colombian companies
Article
Aguirre-Mayorga, Hugo Santiago; Pontificia Universidad Javeriana
Córdoba-Pinzón, Nazly Bibiana; Pontificia Universidad Javeriana
2008-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/944
Process improvement
small business – Colombi
business process
es_ES
This paper presents the results of the research project conducted to obtain a diagnostic study of a group of medium-sized businesses concerning their business process maturity according to the CMM model, in order to establish their status in terms of standardization, business process improvement and the use of methodologies, tools and means for this purpose. A survey was designed with questions focused on establishing the business process maturity level, degree of standardization and business process tools implementation. This survey was answered by the general managers or directors of 61 medium-sized businesses in Bogotá, Medellín, Cali, Barranquilla and Cartagena. Low process maturity level in the group of companies analyzed was observed; therefore there is lowprocess standardization and lack of application of tools for business process improvement. This situation does not create an environment for continuous improvement and process innovation. The question is how to increase the process maturity level in the Colombian small and medium-sized businesses to improve their efficiency and productivity.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/945
2020-10-31T03:23:15Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/945
2020-10-31T03:23:15Z
Pontificia Universidad Javeriana
Vol. 12 No. 2 (2008): July-December
Implementing a scheduling procedure based on evolutionary algorithms for the production of hot-stamped labels
Article
Vargas-Nieto, Fabián; Universidad del Norte
Montoya-Torres, Jairo Rafael; Universidad De La Sabana
2008-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/945
Manufacturing industries-Automation
production scheduling
Evolutionary algorithms
es_ES
This paper considers the problem of production scheduling in a real-life manufacturing plant belonging to the apparel industry. The problem is modeled as a two-stage flexible flow shop, with minimization of both makespan and number of tardy jobs. For this new scheduling problem, we propose a bi-objective evolutionary algorithm. A set of experiments is performed using real data from the company’s database. Experimental results show the relevance of the proposed procedure in terms of performance metrics, as opposed to the current manual scheduling procedure as well as against available commercial schedulers. The procedure was actually implemented as the scheduler procedure at the company. Such results also illustrate the improvement in key performance metrics of the production line.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/946
2020-10-31T03:33:35Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/946
2020-10-31T03:33:35Z
Pontificia Universidad Javeriana
Vol. 12 No. 2 (2008): July-December
Multidimensional ecohydraulic evaluation of aquatic habitats in the preservation of fluvial hydrosystems
Article
Díez-Hernández, Juan Manuel; Universidad de Valladolid
Obregón-Neira, Nelson; Pontificia Universidad Javeriana
2008-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/946
Ecohydraulics
aquatic hábitat
es_ES
This paper highlights the ability of ecohydraulics to improve the understanding of the fluvial ecosystem dynamics and the assessment of the aquatic habitat in the context of the conservation and restoration of lotic hydrosystems. The high-resolution analytical framework used in ecohydraulics to describe the conditions of the fluvial microhabitat, and its complementarity with ecohydrological techniques, suggests the justifiable recommendations that will be more completely scrutinized in the river restoration projects. The paper summarizes the procedure for the ecohydraulic evaluation of the fluvial microhábitat using temporal and spatial scales, whose results are interpreted in studies of instream flows, fluvial hábitat enhancement, and river restoration. The described protocol for the multidimensional fluvial characterization permits the detailed modeling of the micro-hydraulic environment that is perceived by aquatic organisms and conditions heir behavior. This work summarizes the valuable potential of the scientific tools that ecohydraulics offers for the advanced analysis of the fluvial ecosystem and the design of measures for the conservation and rehabilitation of Colombian rivers. The ecohydraulic index that assesses the global quality of the aquatic microhabitat can efficiently incorporate the ecological considerations in water resource management and in the design of intervention in the rivers. The new interdisciplinary frontier of fluvial hydraulics that is constituted by ecohydraulics provides new challenges for hydro-scientific research, as the convenient incorporation of biological criteria and the resulting interpretation in streams with high biodiversity.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/947
2020-11-08T03:41:46Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/947
2020-11-08T03:41:46Z
Pontificia Universidad Javeriana
Vol. 13 No. 1 (2009): January-June
Modification of the zeolite-matrix ratio in FCC catalysts and its impact on yields and quality of middle distillates
Article
Chanagá-Quiroz, Tania; Instituto Colombiano del Petróleo
Giraldo-Duarte, Sonia; Universidad Industrial de Santander
Almanza-Pubiano, Luis; Instituto Colombiano del Petróleo
2009-03-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/947
Zeolites
catalysts
light cycle oil
es_ES
The specific effects of varying the zeolite/matrix ratio in the fluid catalytic cracking (FCC) and the catalyst effects on activity and selectivity for light cycle oil (LCO) yield from the cracking of feedstocks of different physicochemical characteristics , were studied using a microactivity test (MAT) and two feedstocks, aliphatic and naphthenic. With a naphthenic feedstock, highest conversions, gasoline, LCO, dry gas and LPG yields are obtained by increasing zeolite/matrix ratio. Diminishment in slurry yield and in the quality of LCO due to the content of aromatics in LCO are also obtained. With aliphatic feedstock conversions, dry gas, LPG, gasoline and coke yields are improved; LCO and slurry yields are decreased with the increased use of zeolite in the catalyst. The quality of LCO is improved with aliphatic feedstocks; however, zeolite produced a negative effect on this quality.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/948
2020-11-08T03:51:09Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/948
2020-11-08T03:51:09Z
Pontificia Universidad Javeriana
Vol. 13 No. 1 (2009): January-June
Evaluation of the corrosion-erosion rate on API 5L grade 65 steel in a brine-CO2-SiO2-mineral oil system, by electrochemical techniques
Article
Muñoz-Fernández, Héctor Luis; Universidad Industrial de Santander
González-Mendoza, Luis Ángel; Universidad Industrial de Santander
Peña-Ballesteros, Darío Yesid; Universidad Industrial de Santander
2009-03-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/948
Electrochemical corrosión
steel scrap
es_ES
In the production and transportation of oil and gas there are many common problems of erosion-corrosion. The velocity of the flow and the drag of solid particles within the oil transported by pipelines are critical factors in the process of deterioration of low-carbon steels in the presence of CO2. In this research, tests of erosioncorrosion were performed in a cell with a dynamic system of rotating cylinder electrodes at speeds between 1 and 3 m / s, particle sizes between 300μm and 50μm at concentrations between 1 and 9% by weight. Techniques of direct current and alternating current were used to determine the corrosión rate under the conditions evaluated and determine the influence of the particles of sand and the speed of rotation on the corrosion rate of steel. A mathematical relation between the corrosion and system variables was calculated.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/949
2020-11-08T04:28:09Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/949
2020-11-08T04:28:09Z
Pontificia Universidad Javeriana
Vol. 13 No. 1 (2009): January-June
Physicochemical and micromorphological evaluation of asphalt modified with recycled materials
Article
Figueroa-Infante, Ana Sofía; Universidad de La Salle
Fonseca-Santanilla, Elsa Beatriz; Universidad de La Salle
Reyes-Lizcano, Fredy Alberto; Pontificia Universidad Javeriana
2009-03-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/949
Asphalt
polystyrene
pavements
materials-fatigue
es_ES
For more than 30 years, modified asphalt obtained by adding elastomer and plastomer type polymers has been used in flexible pavements. However, the high cost of modifiers has prevented their use from becoming popular; meanwhile no one has found a satisfactory method of final disposal for large volumes of waste polymer that has been generated by the indiscriminate use of disposable products. This work will study the possibility of obtaining an asphalt-polymer mix (using tire crumbs and icopor from disposable cups as modifiers), which would be stable, less expensive and have better physical and chemical properties than conventional CIB asphalt from the industrial complex in Barrancabermeja (Colombia). The modification of asphalt was conducted using the asphalt disperser of the pavements laboratory at the University of La Salle. Physicochemical analysis was conducted in accordance with regulations and included penetration, ductility, softening point, flash point, point of combustion, aging, reological curve, solubility and stability in storage. To establish the composition and compatibility of the polymerasphalt mixtures, the separation was performed in four fractions of asphalt according to the specifications of the SARA method, while the morphological and micromorphological analysis of asphalt and asphalt binders was performed using stereoscopic sweep electronic microscope. The results indicated that a stable and homogeneous asphalt – polymer mix was possible; one which preserved the original asphalt maltenes – asphaltenes relationship and the physicochemical characteristics which would predict an adequate performance when used in asphalt paving mixtures.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/950
2020-10-30T22:44:21Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/950
2020-10-30T22:44:21Z
Pontificia Universidad Javeriana
Vol. 13 No. 1 (2009): January-June
Modelling of a rectifier with unity power factor in half bridge configuration
Article
Fajardo-Jaimes, Arturo; Pontificia Universidad Javeriana
Ojeda-Ruiz, Fernando; Pontificia Universidad Javeriana
Hay-Harb, Abdel Karim; Pontificia Universidad Javeriana
Perilla-Galindo, Gabriel; Pontificia Universidad Javeriana
2009-03-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/950
Electric current rectifiers
power electronics
electronic circuits
es_ES
This paper presents a modelling of a rectifier with unity power factor (PFC) in half bridge configuration. The proposed approach is based on the movable average technique and quasi-static process analysis. This methodology is applied to find the transfer functions that describe the dynamics of the PFC, under a cascade control structure of internal and external loops. This control requires a larger bandwidth for the internal loop. Finally, some experimental results with a digital control implemented in a digital signal processor (DSP) are presented.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/951
2020-10-31T01:28:41Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/951
2020-10-31T01:28:41Z
Pontificia Universidad Javeriana
Vol. 13 No. 1 (2009): January-June
Evaluation of environmental impact diminution when recycled material is used for threaded unions
Article
Fúquene-Retamoso, Carlos Eduardo; Pontificia Universidad Javeriana
Córdoba-Pinzón, Nazly Bibiana; Pontificia Universidad Javeriana
Lara-Borrero, Jaime Andrés; Pontificia Universidad Javeriana
Méndez-Fajardo, Sandra; Pontificia Universidad Javeriana
2009-03-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/951
Environmental impact analysis
waste utilization
joints (engineering)
es_ES
This research performs life cycle analysis of threaded unions manufactured in PVC. The analysis proposes two scenarios according to the amount of recycled material used in the process. One of the scenarios is based on 45% of recycled material and the other one is based on 100% of raw virgin material usage. The analysis was made by means of the software tool Simapro® version 7.0, establishing the environmental impact rating by the Ecoindicator 99 methodology. Data were collected from databases, observation and measurement of an industrial process, specific prototype development under laboratory conditions and interviews with experts. When a composition of 100% of virgin raw material was used for the product, significant effects observed during the product´s life cycle were related to fossil fuel consumption and the generation of inorganic materials in suspension. For a product composition with 45% of recycled material, the most significant effects were related to the generation of inorganic materials in suspension and climate change. Environmental impact diminution was observed in the fossil fuel consumption, acidification / eutrophication, inorganic materials in suspension and climate change categories. Using recycled material in this product lowers the contribution of fossil fuels to the environmental impact from 56% to 5%, compared to the contribution of the other impact categories.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/952
2020-11-08T04:36:08Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/952
2020-11-08T04:36:08Z
Pontificia Universidad Javeriana
Vol. 13 No. 1 (2009): January-June
Academic performance and learning styles in engineering students
Article
Vazquez, Stella Maris; Investigador - Argentina
2009-04-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/952
Academic achievement
educational performance
engineering – study and teaching
es_ES
The paper seeks to identify the learning styles of a group of first-year engineering students, focusing on learning-style differences attributable to demographic variables and the possible relations between learning-style and academic performance. Vermunt’s Inventory of Learning Styles (ILS) has been administered to a sample of 420 first-year engineering students of an Argentine technological university. Demographic data have been gathered, as well as students’ examination marks for the subjects making up the elementary courses. Factor analysis determined the validity of ILS scales, with modifications to the self-regulation and learning orientation ones were proved. The reliability test yielded satisfactory results. Second-order factor analysis confirmed the existence of four learning styles, in keeping with Vermunt’s findings, except with respect to the reproduction-directed style. Multiple regression bore out the central role of self-regulation in the relations between style components. A distinctive profile of engineering students emerged, with learningstyle differences according to age, sex and secondary school. Academic performance differences were found, although ILS is acknowledged to be a weak predictor in this regard. Failure to complete the course in normal time related significantly to surface style, lack of deep processing strategies and low intrinsic motivation.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/953
2020-11-08T04:41:10Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/953
2020-11-08T04:41:10Z
Pontificia Universidad Javeriana
Vol. 13 No. 1 (2009): January-June
Searching for true information with spatial data mining
Article
Dueñas-Reyes, María Ximena; Universidad Distrital Francisco José de Caldas
2009-03-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/953
Data mining
business intelligence
OLAP technology
es_ES
Information is a key element of organizational processes. In recent years, the technology has had an accelerated growth, in line with the increase of what are regarded as useful and necessary tools to facilitate and expedite those processes giving an added value to productivity. Business intelligence has been defined as the transforming of data into knowledge, providing decision-making support at the strategic and tactical level where and when appropriate, providing a competitive advantage and increasing the effectiveness. One of the tools that has become useful for the exploration of data is On-line Analytical Processing (OLAP), which allows to obtain outstanding data among quantities of information, but it is faulty for the analysis of geographical data, for which SOLAP has arisen, which offers methods of special treatment for space data. Data mining has been adapted within companies, with the purpose of carrying out exploration and analysis of data focused on the discovery of knowledge. Because of the important place that space information is occupying nowadays, the spatial data mining has arisen. This process allows us to discover useful and unexpected patterns inside the data. The techniques of spatial data mining are applied to extract knowledge, starting from large volumes of data, which can be of space and non-space types. Among them are generalization, grouping, and space association.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/954
2020-11-08T04:44:25Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/954
2020-11-08T04:44:25Z
Pontificia Universidad Javeriana
Vol. 13 No. 1 (2009): January-June
Billing and payment platform in ubiquitous environments
Article
Solarte-Astaíza, Zeida María; Universidad Autónoma de Occidente
Caicedo-Rendón, Óscar Mauricio; Universidad del Cauca
Imbuz, Javier; Universidad del Cauca
Ausecha, Milton; Universidad del Cauca
2009-03-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/954
Ubiquitous Computing
payment –technological innovations
payment– safety measures
es_ES
Computing has gone through two stages: the centralized computers with high processing power and personal computers. In the short term, we can see a new stage named as ubiquitous computing, which allows services and applications located within fixed or mobile devices to auto-run according to the context of the user, and that those devices have the ability and intelligence to manage the processing and exchange of information according to the needs of the user. This makes the ubiquitous technologies and services that obviously are implemented on them, include new challenges relating to the security (privacy, authentication, authorization, non-repudiation), that needs to be increased on the payment mechanisms that will decide if the services ubiquitous can be commercially safe and viable. The ubiquitous services are emerging with great force. Therefore, it is considered of great importance to begin the study, design, development, implementation and deploy of these services in our country, and then to try to avoid the technological gap in this field. In order to implement and deploy these services in Colombia, this project provides a platform for billing and payment services in ubiquitous mobile environments, that enable the study of the main technological and safety aspects associated with online payment systems in this kind of computing and how it should work in the Colombian business environment.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/955
2020-10-21T22:09:28Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/955
2020-10-21T22:09:28Z
Pontificia Universidad Javeriana
Vol. 13 No. 2 (2009): July-December
AC model for the combined dispatch of bilateral contracts and energy pool considering security constraints
Article
López-Lezama, Jesús María; Universidad de Antioquia
Granada-Echeverri, Mauricio; Universidad Tecnológica de Pereira
Gallego-Pareja, Luis Alfonso; Universida de Estadual Paulista Julio de Mesquita Filho
2009-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/955
Electric power systems-protection
energy markets
es_ES
Reliability is a key aspect in power system design and planning. Maintaining a reliable power system is a very important issue for their design and operation. Under the new competitive framework of the electricity sector, power systems find ever more and more strained to operate near their limits. Under this new scenario, it is crucial for the system operator to use tools that facilitate an energy dispatch that minimizes possible power cuts. This paper presents a mathematical model to calculate an energy dispatch that considers security constraints (single contingencies in transmission lines and transformers). The model involves pool markets and fixed bilateral contracts. Traditional methodologies that include security constraints are usually based in multistage dispatch processes. In this case, we propose a single-stage model that avoids the economic inefficiencies which result when conventional multi-stage dispatch approaches are applied. The proposed model includes an AC representation of the transport system and allows calculating the cost overruns incurred in due to reliability restrictions. We found that complying with fixed bilateral contracts, when they go above certain levels, might lead to congestion problems in transmission lines.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/956
2020-11-08T02:59:26Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/956
2020-11-08T02:59:26Z
Pontificia Universidad Javeriana
Vol. 13 No. 2 (2009): July-December
Industrial waste combustion performance in a b ubbling fluidized bed reactor
Article
Moreno-Contreras, Gonzalo Guillermo; Universidad de Pamplona
Serrano-Rico, Juan Carlos; Universidad de Pamplona
Palacios-Restrepo, Jhon Alexander; Universidad de Pamplona
2009-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/956
Fluidized bed combustion
factory and trade waste
biomass
es_ES
This study presents the results obtained after measuring the performance of biomass combustion (coffee husks and rice husks) in a bubbling fluidized bed reactor. By analyzing the percentages of CO2, O2 and CO obtained from its emissions, it is possible to define the variables that affect the burning of such biomass as well as the optimum operation and combustion points of the reactor. Since the particular characteristics of this type of raw materials hinder its potential benefits, this study suggests alternatives for its better use and exploitation.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/957
2020-10-21T22:48:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/957
2020-10-21T22:48:31Z
Pontificia Universidad Javeriana
Vol. 13 No. 2 (2009): July-December
Solving a two-sided assembly line balancing problem using memetic algorithms
Article
Rubiano-Ovalle, Óscar; Universidad del Valle
Arroyo-Almanza, Alonso; Pontificia Universidad Javeriana
2009-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/957
MATLAB (computer program)
assembly- line methods
assembly-line balancing
algorithms
es_ES
This research explores a characterization of the Two-Sided Assembly Line Problem (TALBP). There is a growing interest among researchers and assembly line practitioners in the solution to this problem, because it is more related to real-life situations than the Simple Assembly Line Balancing Problem (SALBP). Since the complexity of the TALBP is superior to that of the SALBP, this research emphasizes both the construction and the use of metaheuristics as memetic algorithms for finding a very good solution. Memetic algorithms are supported by genetic algorithms. The solution proposed was implemented in Matlab for a motorcycle assembly line at a local firm. Compared to other recognized heuristics and optimization methods, a most suitable solution was obtained in a shorter time through the use of the constructed algorithm. With this, all the restrictions and complexities inherent to the problem were overcome.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/958
2020-10-21T23:06:15Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/958
2020-10-21T23:06:15Z
Pontificia Universidad Javeriana
Vol. 13 No. 2 (2009): July-December
Image synthesis from real scene images by means of a partially autonomous algorithm
Article
Fajardo-Jaimes, Arturo; Pontificia Universidad Javeriana
Vizcaya-Guarín, Pedro Raúl; Pontificia Universidad Javeriana
2009-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/958
Algorithms
image processing
digital cameras
es_ES
This paper presents an image synthesis algorithm for rendering views of a real scene taken with a virtual camera which is located between two real cameras. Specifically, this paper presents how, under certain conditions, a pair of views is enough to obtain a full set of possible views by following the line that joins their optical centers (baseline) without reconstructing explicit 3D models. Test results show the viability of the proposed algorithm for simple scenes (an object with a simple geometry, which is opaque, and does not present any occlusions).
oai:ojs.revistas-javeriana.repositoriodigital.com:article/959
2020-10-21T23:31:19Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/959
2020-10-21T23:31:19Z
Pontificia Universidad Javeriana
Vol. 13 No. 2 (2009): July-December
Influence of temperature, granulation, and water in the cohesion of asphalt mixtures
Article
Reyes-Ortiz, Oscar Javier; Universidad Militar Nueva Granada
Millán-Montejo, Sebastián; Universidad Militar Nueva Granada
2009-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/959
Asphalt mixtures-effect of temperature
granulometry
cohesion
es_ES
This research studies the influence of temperature, water, and granulometry in the cohesion of asphalt mixtures. The study was carried out by subjecting dry and wet samples to the UCL test. The research started by characterizing the granular material and three asphalts with different behaviour (60/70, 85/100 and modified with polymer SBS). The grain size curves used correspond to the so established as md10 and md12 by the Instituto de Desarrollo Urbano (IDU). The asphalt optimal percentage was determined via the Marshall apparatus in simples without filler, following UCL test procedures. Several samples were built with the optimal percentage and tested by means of an Angeles Machine at different typical Colombian temperaturas in dry and wet state. The results obtained show that the modified asphalt presents a higher cohesion rate than conventional asphalts; that water diminishes the cohesion between the asphalt and the particles irrespective of the granule used, and that the md12 granulometry yield higher losses tan the md10 grain size.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/960
2020-11-08T03:13:06Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/960
2020-11-08T03:13:06Z
Pontificia Universidad Javeriana
Vol. 13 No. 2 (2009): July-December
Design of a proprietary RFID protocol for a specific application
Article
Bateman, Javier; Escuela Colombiana de Ingeniería
Cortés, Cristian; Escuela Colombiana de Ingeniería
Cruz, Pablo; Escuela Colombiana de Ingeniería
Paz-Penagos, Hernán; Escuela Colombiana de Ingeniería
2009-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/960
Radio frecuency identification systems
wireless communication systems
identification (control systems)
es_ES
This article displays the development of a research project on the design of a proprietary RFID protocol for access control of personnel, visitors, and assets for any public, managerial, commercial or industrial installation. The technology RFID across the ISO standards 15693 (smart cards), ISO/IEC 14443 (proximity cards), ETSI TS 102.190, ISO/IEC 18092 and ECMA 340-V2 attempt to guarantee access safety without resorting to sophisticated devices or complex methods and at a relatively low implementation cost.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/961
2020-10-21T23:55:46Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/961
2020-10-21T23:55:46Z
Pontificia Universidad Javeriana
Vol. 13 No. 2 (2009): July-December
Modeling the effect of cover scenarios on nutrient migration (N, P2O5) in the upper Magdalena river Basin (Huila, Colombia)
Article
Burbano-Girón, Jaime; Pontificia Universidad Javeriana
Domínguez, Efraín Antonio; Pontificia Universidad Javeriana
Etter, Andrés; Pontificia Universidad Javeriana
2009-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/961
Geographic information systems
water quality
hydrologic cycle
es_ES
The combination of deforestation due to agricultural frontier expansion and the increased use of fertilizers due to agricultural intensification has lead to an increase in the load of sediments and pollutants that negatively affect water quality in rural areas. This problem is particularly serious in the Colombian Andean region. This study applies a hydrological simulation model to compare the effect of four vegetable coverage management scenarios on nutrient migration from agricultural practices in the Upper Magdalena river basin. The simulation of water movement over hillsides and channels, which was run using the MIKE SHE and MIKE 11 models, showed an acceptable performance (S/ σΔ =0.84, R=0.82, R2=0.67). However, pollutant migration showed a very low sensitivity to vegetable coverage in the configuration of the different model simulations (p > 0.05), with reductions in pollutant loads ranging only between 2 and 4%. Such reductions have to do with the intrinsic properties of vegetation (which act like a barrier to sediment flow,) with its ability to increase soil infiltration (therefore reducing runoff,) and with nutrient absorption by plants.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/962
2020-10-22T00:06:21Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/962
2020-10-22T00:06:21Z
Pontificia Universidad Javeriana
Vol. 13 No. 2 (2009): July-December
Extension of Gauthier’s method for multivariable realizations by incorporating coprime fractions
Article
Pineda-Torres, Franklin; Universidad Autónoma de Colombia
Hurtado-Cortés, Luini Leonardo; Universidad Distrital Francisco José de Caldas
Chica-Leal, Alonso de Jesús; Universidad Autónoma de Colombia
2009-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/962
Algorithms
matrix
multivariate analysis
es_ES
This paper presents an extension of Gauthier’s algorithm, which solves the problem of searching for the multivariable minimal realization starting from square transference matrices. Previously, the algorithm incorporates the coprime fractions developed with Silvester matrices and qr factorization. Since the coprime fractions have a special relation with matrices in polynomial fraction, they show their differences by analyzing them independently. The general features are set out, and the developed functions named, in order to emphasize the different search paths and their representation in state space (neither of which are not unique) for the coprime fraction. For demonstration we used a multivariable dynamic system, where the efficiency and limitations of the developed algorithm are checked based on the functions performed with the Matlab® Control Toolbox
oai:ojs.revistas-javeriana.repositoriodigital.com:article/963
2020-10-22T00:16:12Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/963
2020-10-22T00:16:12Z
Pontificia Universidad Javeriana
Vol. 13 No. 2 (2009): July-December
About a numeric solution of the wave equation
Article
Piñeros-Cañas, Juan Carlos; Universidad Nacional de Colombia
Garzón-Alvarado, Diego Alexander; Universidad Nacional de Colombia
2009-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/963
Wave equations
differential equations
telecommunication
es_ES
The numerical solution of partial differential equations that evolve over time is a research field in constant development. In this paper on the computational solution to the wave equation, two algorithms of time integration are used: the Newmark method and the finite difference method (FDM). The Newmark method has a high precision and excellent convergence rate compared to the FDM. The FDM can be easily implemented. In an effort to compare these two methods, two typical problems using FORTRAN were implemented: first, a square membrane completely fixed at its edges with an initial velocity in the center, and second, a simply supported beam with an initial velocity at one of its ends. These test problems are discretized in the space domain through the finite element method, and in the time domain through the Newmark method and the FDM. The results show that the Newmark method allows using time steps that are greater than those of the FDM, but present a higher numerical oscillation. These results are expected to be the source of initial data for a subsequent comparison with other methods.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/964
2020-10-22T00:23:30Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/964
2020-10-22T00:23:30Z
Pontificia Universidad Javeriana
Vol. 13 No. 2 (2009): July-December
Design and implementation of a sensor network to gather variables for the structural surveillance of bridges
Article
Flórez-Rubio, David Magín; Lemov
Otálora-Sánchez, Camilo; Pontificia Universidad Javeriana
Páez-Rueda, Carlos Iván; Pontificia Universidad Javeriana
2009-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/964
Sensor networks
electronic instrumentation
structural optimization
es_ES
This article details the design and implementation of a sensor network for structural surveillance of bridges. Such network was piloted at the César Gaviria Trujillo Viaduct in the department of Risaralda, Colombia. Results were successful in terms of solution and reliability of the network.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/965
2020-10-22T00:32:12Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/965
2020-10-22T00:32:12Z
Pontificia Universidad Javeriana
Vol. 13 No. 2 (2009): July-December
Electric feed systems for subway-like massive public transportation systems
Article
Moreno-Chuquén, Ricardo; Universidad de los Andes
Ríos-Mesías, Mario Alberto; Universidad de los Andes
Ramos-López, Gustavo Andrés; Universidad de los Andes
Quintero-Restrepo, Eduardo; Universidad de los Andes
2009-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/965
Electric power systems-planning
electric driving
public transport
es_ES
Electric mass rapid transit systems have been developed simultaneously with electric distribution systems in different cities around the world. However, it is not the case of Colombia, particularly in urban cities such as Bogotá, where the electric distribution system is focused on the current traditional clients. Thus, the question that rises is what electric traction system requirements will be expected from the electricity network operator. This work presents a general approach to state-of-the-art electrified distribution systems for rapid transit systems such as subways and commuter railroads, which have high topical relevance for Bogotá. Electrified systems depend on characteristics such as: voltage level, configuration of the electric network, type of feeding conductor, and power rating of the traction substations. This article presents the general characteristics of the feeding system.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/966
2020-12-11T22:29:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/966
2020-12-11T22:29:31Z
Pontificia Universidad Javeriana
Vol. 14 No. 1 (2010): January-June
Validation of glycerin refining obtained as a by-product of biodiesel production
Article
Posada-Duque, John Alexander; Universidad Nacional de Colombia
Cardona-Alzate, Carlos Ariel; Universidad Nacional de Colombia
2010-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/966
Quality of glycerin
glycerin market
diesel fuels
es_ES
This work discusses a number of aspects related to glycerin-related production, market, and application in commercial products. Three main qualities of commercial glycerin are evaluated: raw glycerin (80-88 wt %), technical grade glycerin (98 wt %), and refined glycerin (USP or FCC, 99.7 wt %). Purification schemes for each glycerin quality are simulated. This study shows that, after purification process, it is possible to obtain methanol at 99 wt %, which can be recycled for biodiesel production. Simulation results show that the purifying glycerin to obtain different levels of purity can be economically feasible, and that market quality specifications can be reached as well.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/967
2020-12-11T22:29:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/967
2020-12-11T22:29:31Z
Pontificia Universidad Javeriana
Vol. 14 No. 1 (2010): January-June
Calculation of elastic deformations in optimal two-dimensional structures for a number of assembly cases
Article
Camacho-López, Carlos Julio; Universidad Nacional de Colombia
Garzón-Alvarado, Diego Alexander; Universidad Nacional de Colombia
2010-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/967
Couplings
flexible
structural optimization
structural design
es_ES
This paper presents a method to analyze elastic deformations and stiffness in two-dimensional structures with different assembly configurations among their elements. Initially, the optimal structure is obtained through topology optimization, and then a method to analyze different types of connections (hinge, flexible and rigid connections) in structural components is developed. Next, two widely documented examples are developed and validated. The versatility of the method and its functionality during both the design process and the selection of the best assembly option are determined. This work contributes to analyzing structures with different interconnection setups among their elements. Existing work is complemented through both the integration of topological design and the choice of the best setup features for a number of cases where assembly and design requirements are related.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/968
2020-12-11T22:29:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/968
2020-12-11T22:29:31Z
Pontificia Universidad Javeriana
Vol. 14 No. 1 (2010): January-June
Massive data storage resource management in a virtual research environment
Article
Duarte-López, Indira Rocío; Universidad Distrital Francisco José de Caldas
Pérez-Castillo, José Nelson; Universidad Distrital Francisco José de Caldas
2010-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/968
Computational grids (computer systems)
computer networks – management
shared virtual environments
es_ES
Managing massive data storage repositories is one of the most important problems to solve in virtual research environments, where the complexity of handling large volumes of data involves providing a high degree of control to ensure that data are located properly and are permanently available for processing. This paper discusses the innovative creation of a massive storage system at a highperformance computer center, which uses the advantages of hierarchical storage for an efficient management of information and a proper utilization of available storage resources. Research results seek to meet the needs of researchers who need to store files resulting from tasks performed on distributed resources, without a concern about technical details of the storage technologies used.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/969
2020-12-11T22:29:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/969
2020-12-11T22:29:31Z
Pontificia Universidad Javeriana
Vol. 14 No. 1 (2010): January-June
Combined Use of GRASP and Path-Relinking during Production Scheduling in order to Minimize Total Weighted Tardiness in a Machine
Article
Vega-Mejía, Carlos Alberto; Pontificia Universidad Javeriana
Caballero-Villalobos, Juan Pablo; Pontificia Universidad Javeriana
2010-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/969
Production scheduling
GRASP (computer file)
times and movements
es_ES
This paper shows the results of integrating two meta-heuristic techniques, GRASP and Path-Relinking, which have not been widely used to solve production-scheduling problems despite of their proved efficiency. These techniques were used to solve the problem of minimizing total weighted tardiness problem in a machine, 1 || Σ WjTj, and good results in short time were obtained. Experiment outcomes show that the use of Path-Relinking as a final step for GRASP can result in qualitysequence improvements. In order to use GRASP in the solution to this problem, a dynamic utility function for the jobs to process, bearing in mind its descriptive parameters, is proposed. Additionally, this work offers a clear implementation proposal for ventures of different sizes, so they are able to overcome this problem by using MS Excel, instead of specialized scheduling software.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/970
2020-12-11T22:29:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/970
2020-12-11T22:29:31Z
Pontificia Universidad Javeriana
Vol. 14 No. 1 (2010): January-June
Implementation of ludic activities as a complementary methodological tool in the teaching of the traditional and the TOC production methods for multitask environments management
Article
Marín-González, Yeraldin; Universidad de Córdoba
Montes de la Barrera, José Orlando; Universidad de Córdoba
Hernández-Riaño, Helman Enrique; Universidad de Córdoba
López-Pereira, Jorge Mario; Universidad de Córdoba
2010-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/970
Engineering – Methodology
Production methods – Education, secondary
academic achievement
es_ES
The purpose of this study is to design and implement a play activity which simulates a multi-project production system through both the traditional and the TOC production methods in order to manage multitasking environments in the Industrial Engineering Program at Cordoba University. The study also intends to determine the impact of play activity tools on students’ academic performance concerning the topic stated above. A quasi-experimental design with pretest, post-test and control group was used. The most important conclusion is that the tools mentioned have a positive effect on academic performance, since the experiment group performed better than the control group.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/971
2020-12-11T22:29:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/971
2020-12-11T22:29:31Z
Pontificia Universidad Javeriana
Vol. 14 No. 1 (2010): January-June
Application for statistic control of online processes as part of a flexible manufacturing system
Article
Zambrano-Rey, Gabriel Mauricio; Pontificia Universidad Javeriana
Fúquene-Retamoso, Carlos Eduardo; Pontificia Universidad Javeriana
Aguirre-Mayorga, Hugo Santiago; Pontificia Universidad Javeriana
2010-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/971
ndustrial process control – statistics
flexible manufacturing systems
linear control systems
es_ES
This work proposes a new procedure for enhancing the monitoring of industrial processes in organizations with highly integrated systems. Manufacturing Execution Systems (MES) permit an effective integration between Enterprise Resource Planning software and Flexible Manufacturing Systems at the shop floor. Based on a previously-developed integration between these two systems, a MES layer-based procedure for Statistical Process Control (SPC) is developed. This piece of software solves problems such as connectivity, data acquisition and alarm-based data analysis based on both control specifications and limits and cause-analysis through decision trees. This work can be part of any process and does not require any additional MES software, which reduces costs and maintenance. This software was tested through an artificial-vision-based quality control station with mechanic parts automated through an FMS system.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/972
2020-12-11T22:29:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/972
2020-12-11T22:29:31Z
Pontificia Universidad Javeriana
Vol. 14 No. 1 (2010): January-June
PID and fuzzy controller design for DC motor positioning
Article
Rairán-Antolines, José Danilo; Universidad Distrital Francisco José de Caldas
Guerrero-Cifuentes, Cindy Estéfany; Universidad Distrital Francisco José de Caldas
Mateus-Pineda, Jaime Alfredo; Universidad Distrital Francisco José de Caldas
2010-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/972
PID controllers
intelligent control
servomechanisms
es_ES
The performance of PID and fuzzy controllers is compared in a commercial device normally used in model airplanes: the S3004 Futaba Servo. The controller circuit, the power amplifier and the sensor are modified, and then the motor is observed. Next, a root-locus method is used to tune a PID for angular position control. Simulations and control are made in Matlab’s Simulink, and also a data acquisition card (PCI 6024E) is used. Results are analyzed at the end of the document: although the PID controller works better, the fuzzy controller shows a similar performance.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/973
2020-12-11T22:29:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/973
2020-12-11T22:29:31Z
Pontificia Universidad Javeriana
Vol. 14 No. 1 (2010): January-June
Methodology for the assessment of external costs of accidents in transportation projects
Article
Márquez-Díaz, Luis Gabriel; Universidad Pedagógica y Tecnológica de Colombia
2010-10-27
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/973
Forecasting – Methodology
traffic accidents – costs
traffic accidents–statistics
es_ES
This article deals with the development of a methodology for improving the assessment of external costs of traffic accidents in the economic assessment of transportation projects. It reviews the causes, variables and determining actions in traffic accidents; it also outlines some forecasting techniques and proposes an approach for the calculation of total and marginal costs of accidents. It is intended to assess external costs of accidents based on the analysis of accident statistics, and on the identification of relevant causes and variables depending on the type of transportation project to be evaluated. The methodology used helps improving the assessment of external costs of accidents, and proposes a basis for research on market-based instruments that permit an adequate internalization of external costs of accidents. In order to properly apply the methodology proposed, there must be an improvement in both national statistic records and the processes for identifying the causes of accidents. Finally, it is recommended that welfare losses caused by the risk of dying in a traffic accident, as well as the social and moral costs caused by traffic accident casualties, are included in the analysis.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1123
2020-10-18T00:31:01Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1123
2020-10-18T00:31:01Z
Pontificia Universidad Javeriana
Vol. 14 No. 2 (2010): July-December; 223
Design and construction of the robotic hand prosthesis UC-1
Article
Quinayás-Burgos, César Augusto; Universidad del Cauca
Muñoz-Añasco, Mariela; Universidad del Cauca
Vivas-Albán, Óscar Andrés; Universidad del Cauca
Gaviria-López, Carlos Alberto; Universidad del Cauca
2011-03-15
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1123
Prosthetic hand
robotic hand
anthropomorphic finger
es_ES
This article shows the steps followed in the design and construction of the prosthetic right hand UC-1. This device was designed based on a tree structure: three fingers with a range of three degrees for each finger. The operation and control of the prosthesis was tested in simulation, and then a prototype of a multi-articulated finger was designed and built. It was small and compact, and could be easily integrated into a palm structure in order to make a polymorphic hand. After the validated finger was completed, three finger prostheses were built. Analog Hall and force sensors were added to provide sensitivity to the hand, as well as a DSP control system which was managed through Labview®. The goal is to obtain a first prototype that can offer a functional solution to hand amputees, offering a number of grasping movements, as well as cylindrical, spherical, lateral and hook grasping.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1124
2020-10-18T00:42:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1124
2020-10-18T00:42:31Z
Pontificia Universidad Javeriana
Vol. 14 No. 2 (2010): July-December; 239
Numerical essays on the development of Turing patterns under the effect of incompressible convective fields: An approach from the cavity problem
Article
Garzón-Alvarado, Diego Alexander; Universidad Nacional de Colombia
Galeano-Urueña, Carlos Humberto; Universidad Nacional de Colombia
Mantilla-González, Juan Miguel; Universidad Nacional de Colombia
2011-03-15
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1124
Reaction-advection-diffusion
Turing instabilities
cavity problema
es_ES
This work presents a number of numerical examples of reaction-difussion equations in Turing space, modified by convective fields in incompressible flows, using a Schnakenberg reaction mechanism. Examples were made in 2D using quad elements, which have an imposed advective field derived from the cavity problem solution. The developed model consists of an uncoupled system of equations including the reaction-advection-diffusion equations and the Navier-Stokes equations for incompressible flow. This system is solved simultaneously using the finite element method. Results illustrate that complex patterns are formed, mixing dots and stripes which reach a stable state. Changes in pattern concentration in both space and time are also shown due to the effect of the advective field. Numerical examples confirm that pattern formation is independent of initial conditions and mesh.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1125
2020-10-18T00:49:02Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1125
2020-10-18T00:49:02Z
Pontificia Universidad Javeriana
Vol. 14 No. 2 (2010): July-December; 261
Environmental impact assessment of brass-threaded unions through product life cycle assessment (LCA)
Article
Fúquene Retamoso, Carlos Eduardo; Pontificia Universidad Javeriana
Lara-Borrero, Jaime Andrés; Pontificia Universidad Javeriana
Méndez-Fajardo, Sandra; Pontificia Universidad Javeriana
2011-03-15
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1125
Environmental impact assessment
LCA
brass
recycling
es_ES
This paper establishes an environmental impact assessment applied to brass threaded unions. Two different scenarios were analyzed based on the amount of material used in the process: i) 100% virgin raw material usage and ii) 92.3% of recycled material usage. For the analysis and environmental impact evaluation, this study made use of the life cycle assessment methodology (LCA). It also used Ecoindicator 99 for grading impact, as well as the computer tool Simapro® for calculations. When a composition of 100% virgin raw material was used, significant impacts were identified on mineral extraction and air suspended inorganic material categories. For 92.3% of recycled material, major effects were related to air suspended organic material and impact category related to acidification/ eutrophication. The comparison of both scenarios made it posible to detect an impact attenuation in mineral extraction and air suspended inorganic material categories. As a consequence of using recycled material in the product, a significant global impact reduction of 231% in terms of Pt was noticed.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1126
2020-10-18T02:31:25Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1126
2020-10-18T02:31:25Z
Pontificia Universidad Javeriana
Vol. 14 No. 2 (2010): July-December; 275
Greedy randomized adaptive search procedure (GRASP): A valuable alternative for minimizing machine total weighted tardiness
Article
Caballero-Villalobos, Juan Pablo; Pontificia Universidad Javeriana
Alvarado-Valencia, Jorge Andrés; Pontificia Universidad Javeriana
2011-03-15
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1126
Production programming
metaheuristics
weighted tardiness problema
GRASP
es_ES
A GRASP algorithm was implemented in a common spreadsheet for single machine scheduling total weighted tardiness problem, and was tested with OR-Library instances. Results were compared with optimum or best known schedules for each instance, yielding less than 1% of difference in 93% of the cases, which results in an excellent tradeoff among results quality, computational effort and implementation easiness. Local search was performed on the post-optimization phase, based on dominancy rules, which yielded even better results with little implementation effort.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1127
2020-10-18T02:40:48Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1127
2020-10-18T02:40:48Z
Pontificia Universidad Javeriana
Vol. 14 No. 2 (2010): July-December; 297
Influence of water on asphalt mixture stripping: A study on asphalt binders
Article
Rondón-Quintana, Hugo Alexander; Universidad Católica de Colombia
Moreno-Anselmi, Luis Ángel; Universidad Militar Nueva Granada
2011-03-15
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1127
Stripping
asphalt mixture
water effect
asphalt cement
es_ES
A mayor distress on asphalt mixtures occur due to the physical separation of asphalt cement and the aggregate produced by adhesion failure. This phenomenon is called stripping. The causes that produce stripping are not yet fully understood. This paper describes the influence of asphalt cement on stripping which is due only to wáter effect. Indirect strength tensile tests were performed on two hot asphalt mixtures with two different asphalt cements (AC 80-100 and AC 60-70). There is a change of consistency in asphalt cement when it is saturated with water, and this change affects asphalt cement-granular aggregate connection.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1128
2020-10-18T02:47:00Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1128
2020-10-18T02:47:00Z
Pontificia Universidad Javeriana
Vol. 14 No. 2 (2010): July-December; 313
Impact of leachate incorporation on an anaerobic reactor startup in domestic sewage treatment
Article
Torres-Lozada, Patricia; Universidad del Valle
2011-03-15
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1128
Leachate
domestic sewage
anaerobic combined treatment
es_ES
When the content of biodegradable organic-material in leachates is high, biological treatment is viable. However, high levels of nitrogen and other refractory compounds may be inhibitory or toxic. A leachate management strategy has been the leachate mixture with domestic sewage (DS) to anaerobic treatment for its simplicity and lower operating costs. The preliminary evaluation of the UASB reactor in bench scale, treating DS (R1), compared with two reactors with pH-adjustment and treating mixtures of leachate and DS in volumetric proportions of 5% (R2) and 10% (R3), showed that R1 and R2 operating with 8 hours of hydraulic retention time – HRT, achieved average removal efficiencies of 66% and 73% to COD and 90% and 84% to TSS respectively. In R3, the optimal HRT was higher (10 hours) and COD and TSS removal efficiencies were lower (61%). The results confirm the combined-treatment feasibility with DS and leachate in rates up to 10%. However, the 10% increase in leachate proportion affected mostly the performance of the reactor treating DS exclusively
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1129
2020-10-18T02:54:24Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1129
2020-10-18T02:54:24Z
Pontificia Universidad Javeriana
Vol. 14 No. 2 (2010): July-December; 327
Unconstrained two-dimensional knapsack problem
Article
Álvarez-Martínez, David; Universidad Tecnológica de Pereira
Toro-Ocampo, Eliana Mirledy; Universidad Tecnológica de Pereira
Gallego-Rendón, Ramón Alfonso; Universidad Tecnológica de Pereira
2011-03-15
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1129
Unconstrained two-dimensional knapsack problema
particle swarm optimization
simulated annealing
es_ES
Cutting and packing problems are common in operations research, due to their big spectrum of application in the industry and its highly mathematical and computational complexity for the academy. In this study we present the unconstrained twodimensional cutting stock problem of rectangular items, with and without weights associated to the items, bearing in mind the possibility to rotate items at 90°, and with guillotine cuts (also known as unconstrained two-dimensional guillotineable single knapsack problem). For this problem, we describe the mathematical model recognized by the academic community. We develop an appropriate encoding of the problem so it is possible to work on it using metaheuristic hybrid algorithm particle swarm optimization and simulated annealing. To check the efficiency of this methodology, case studies were taken from specialized literature, where the presented solution method could be analyzed and compared with current problems. The results obtained had an excellent quality and had never been reported.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1130
2020-10-17T23:18:49Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1130
2020-10-17T23:18:49Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 77 - 90
Effects of metakaolin percentages in the final properties of blended concrete
Article
Torres-Agredo, Janneth; Universidad Nacional de Colombia
Mejía de Gutiérrez, Ruby; Universidad del Valle
Delvasto-Arjona, Silvio; Universidad del Valle
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1130
Strength of materials
concrete-testing
pozzuolanas-testing
metakaolintesting
es_ES
The present paper is part of a research project whose main objective was to obtain metakaolin (MK) from raw materials obtained in Colombia. MK is to be used as a pozzolan in Portland cement manufacturing. In previous studies, the performance shown by concrete blended with MK, in terms of mechanical strengths and durability, proved to be adequate. As a result, the effect of the percentage of added MK on the properties of concrete was studied. For purposes of comparison, MK was substituted with silica fume (SF). Compressive strength and durability tests, such as total absorption, capillary absorption, and chloride permeability, were used. For compressive strength, concrete showed better performance when mixed up with a 20% MK. Higher MK percentages generated a decrease in resistance. Additionally, when compared to concrete mixed with SF, compressive strength was slightly lower for MK-mixed concrete. Nevertheless, MK proved to be better in terms of durability with respect to the pattern sample and the one added with SF.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1131
2020-10-18T00:09:12Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1131
2020-10-18T00:09:12Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 219 - 243
Reflections on the adoption of model-based approaches for software-development
Article
Quintero, Juan Bernardo; Universidad de Antioquia
Duitama-Muñoz, Jhon Freddy; Universidad de Antioquia
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1131
Application software – development
model-driven software architecture
software engineering
es_ES
Reusing models is one of the most widely accepted strategies among recent methodological approaches to software development. It is so much so that these approaches have extensively included various models with the suggestion that, in order to develop a software application, it is just necessary to build models and to transform them semi-automatically with the support of an information system. However, there are still considerable challenges in the adoption of modelfocused approaches, such as a variety of techniques, languages, and tolos available for model transformation. This variety of resources complicates the standard selection of strategies for transforming models which are appropriate for a particular project or company. This paper analyzes the different model engineering approaches, as well as previous studies in model transformation, in order to serve as a guide in the selection process of model-focused approaches for software development.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1132
2020-10-18T23:36:47Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1132
2020-10-18T23:36:47Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 47 - 60
Comparison between interval analysis and particle swarm optimization techniques for functions with restrictions
Article
Vanegas-Ardila, Diego; Universidad Industrial de Santander
Barragán-Niño, Karol Sebastián; Universidad Industrial de Santander
Correa-Cely, Rodrigo; Universidad Industrial de Santander
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1132
es_ES
This paper shows the comparison made between the particle swarm optimization (PSO) algorithm and the interval analysis optimization method for solving nonlinear-function optimization with equality and/or inequality constraints. The Interval analysis optimization method (IAO) was based on the one initially proposed by Ichida (1996). It was used to find the global optimum of a multimodal function with up to three variables, which is subject to equality and inequality constraints. It was found that the PSO algorithm was significantly faster for all functions, although its precision was limited. On the other hand, the IAO method was accurate in all cases, but took a considerably longer computational time.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1133
2020-10-17T23:34:27Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1133
2020-10-17T23:34:27Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 105 - 124
Influence of parking costs on the use of cars in Bogota
Article
Márquez-Díaz, Luis Gabriel; Universidad Pedagógica y Tecnológica de Colombia
Gallo-González, Lyda Astrid; Universidad Pedagógica y Tecnológica de Colombia
Chacón-Pérez, Carlos Andrés; Universidad Pedagógica y Tecnológica de Colombia
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1133
Automobile parking - cost effectiveness
parking lots - prices – Bogota (Colombia)
automobiles - use studies
es_ES
This paper describes the use of the stated-preference technique in a discrete choice experiment carried out to examine the behavior of car users concerning changes in parking costs in the central business district of Bogotá. The research seeks to determine the level of elasticity between parking costs and car use for work trips. First, the area of interest is selected, bearing in mind compatibility with other studies. Then, the experiment is designed taking into account variables such as costs, commuting time, parking time and walking distance from the parking lot to the workplace. A multinomial logit model is used in order to determine elasticity between the parking cost and the use of the car, and to experiment with the variables included in the model. The model shows that the elasticity between parking costs and car use is -0.13496, which is considered low when compared to international standards. However, the model indicates high sensitivity on the part of car users with respect to walking distances. This work contributes to improving parking pricing policies to discourage the use of cars in urban areas.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1134
2020-10-17T22:58:38Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1134
2020-10-17T22:58:38Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 29 - 46
Step-by-step flash method for calculating absorption columns
Article
Sánchez-Correa, Cesar; Fundación Universidad de América
Calvache, Jaime Arturo; Fundación Universidad de América
Álvarez-Aguilar, Esteban; Fundación Universidad de América
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1134
Absorption columna
algorithms
Flash (computer file)
es_ES
This work presents a step-by step calculation strategy to solve the equilibrium model applied to an absorption column. The algorithm used manipulates the equations of the column by grouping them into sets for each stage. Each group is treated separately through a flash calculation. This is a generalization of the algorithm for extraction cascades, which now covers two more cases: a) recirculation between stages and, b) the possibility of several feeding modes. Three case studies with specific settings are presented: a) A columna with a partial reboiler and specified heat flow; b) a column with several feeding modes; and c) a column with recirculation between stages
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1135
2020-10-17T23:13:31Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1135
2020-10-17T23:13:31Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 61 - 76
Monte Carlo optimization using beta distribution
Article
Velásquez-Henao, Juan David; Universidad Nacional de Colombia
Pulgarín-Agudelo, Yeiny; Universidad Nacional de Colombia
Castaño-Arias, Eliana; Universidad Nacional de Colombia
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1135
Monte Carlo method
heuristics
combinatorial optimization
es_ES
This paper presents an innovating Monte Carlo method for exploring n-dimensional non-linear functions defined in a compact domain which is transformed to the hypercube [0;1]n. This approach uses the beta distribution for generating random samples. Te distribution parameters, named Alpha and beta, are dynamically adjusted so that, in the first iterations, the beta distribution looks like the uniform distribution. ; in the last iterations, the beta distribution is centered in the known minimum and the variance is near zero, so that only the neighborhood around the optimum is sampled. The method proposed is tested through four well known benchmark functions.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1136
2020-10-17T23:56:53Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1136
2020-10-17T23:56:53Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 171 - 195
Review of photocatalytic materials for hydrogen production from h2S
Article
Corredor-Rojas, Laura Milena; Universidad Industrial de Santander
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1136
Photocatalysis
hydrogen sulfide
hydrogen
es_ES
Based on the work carried out by Fujishima and Honda (1972), who accomplished the electrochemical photolysis of water on a TiO2 electrode, numerous researchers have extensively studied water and sulfide hydrogen splitting by using semiconductor photo-electrodes and photocatalysts for producing hydrogen. Current research is focused on the development of a stable material with visible-light response. Both the catalytic activity of the semiconductor and the design of the reactor influence the possibility of applying photocatalytic reactions to industrial processes. Different types of reactors have been tried but, so far, a successful laboratory photocatalysis setup has not been scaled up to an industrially relevant scale. This paper presents a review of heterogeneous photocatalyst materials for hydrogen production based on direct and indirect conversion of hydrogen sulfide. Additionally, this study proposes a number of schemes for integrating photo-assisted reactions with industrial processes for H2S treatment.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1137
2020-10-17T23:50:13Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1137
2020-10-17T23:50:13Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 145 - 169
Recharge estimation in aquifers of the Bogota Savannah
Article
Antonio-Fragala, Federico; Pontificia Universidad Javeriana
Obregón-Neira, Nelson; Pontificia Universidad Javeriana
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1137
Aquifers - Sabana de Bogotá (Colombia)
Water balance (Hydrology)- Sabana de Bogotá (Colombia)
Groundwater - Sabana de Bogotá (Colombia)
es_ES
Recharge is a key factor for the sustainability of aquifers. In the Bogota Savannah there is an increasing interest in groundwater resources because of both the increase in water demand and climate change. Even though recharge studies in this region have traditionally focused on soil wáter balance approaches based on the use the FAO methodology for determining actual evapotranspiration levels, this work applies a frugal monthly water balance model and calibrates its lumped parameters through minimization of the error function between observed and simulated discharges in each hydrological basin. Model results indicate that recharge depends on the basin analyzed, and that the average model recharge in the Bogota Savannah is 112 mm yr-1, which is compared to the range of 8-81 mm yr-1 found in previous studies. This study suggests that caution should be used when decisions on the sustainability of groundwater resources in the Bogotá plain are based on a recharge estimate obtained from a single methodology, and that a multiple technique approach is recommended.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1138
2020-10-18T00:23:34Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1138
2020-10-18T00:23:34Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 245 - 268
Performance assessment of organic coatings through accelerated tests and electrochemical impedance spectroscop
Article
Bedoya-Lora, Franky; Universidad de Antioquia
Calderón-Gutiérrez, Jorge; Universidad de Antioquia
Bermúdez-Castañeda, Ángela; Universidad de Antioquia
Castaño-Gonzalez, Juan; Universidad de Antioquia
Echeverría-Echeverría, Félix; Universidad de Antioquia
Maya-Montoya, Juan; Interconexión Eléctrica S. A. ESP
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1138
Impedance spectroscopy
galvanized steel
protective converings
es_ES
Accelerated tests together with electrochemical impedance spectroscopy (EIS) analysis, are powerful tools to follow up the degradation process of organic coatings under controlled conditions in relatively short periods of time. This work presents a review of the most common accelerated methods, coupled with EIS measurements and applied to organic coatings on galvanized steel under simulated atmospheric environments.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1140
2020-10-17T23:43:49Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1140
2020-10-17T23:43:49Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 125 - 144
Prioritized interventions in solid-waste management plants through structural analysis
Article
Oviedo-Ocaña, Edgar Ricardo; Universidad del Valle
Marmolejo-Rebellón, Luís Fernando; Universidad del Valle
Torres-Lozada, Patricia; Universidad del Valle
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1140
Waste utilization
theory of structures
waste treatment plants
es_ES
In Colombia, materials recovery in municipal solid wastes (MSW) and their reincorporation into the productive cycle have been carried out in productive units known as material recovery facilities (MRFs), which have been implemented especially on small municipalities. The effectiveness of MRFs has been questioned. In order for them to be sustainable, it is important to identify the aspects that influence the raw materials, processes and products of these productive units. As a reference, this work takes five MRFs in Valle del Cauca, Colombia, where 18 variables related to the system performance were identified. The structural analysis allowed the identification of factors external to the MRFs, such as the generation of MSW, as well as a number of practices such as classification, storage, and waste presentation. They have an impact on the quality and quantity of raw materials. Work on these key elements will make it possible to improve the design of facilities, will optimize process operation, will increase the quality of the products and will reduce rejections. Prioritized interventions to improve performance in MRFs include the formulation and adaptation of methodologies to characterize the MSW, the promotion of solid waste segregation at the source for the users, the implementation of technologies adapted to the local context, and the training of operators and professionals involved in the selection, design, operation and monitoring of technologies.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1141
2020-10-17T22:47:32Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1141
2020-10-17T22:47:32Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 9 -28
Numerical simulation of combustion furnaces equipped with radiant wall burners
Article
Arrieta-Burgos, Andrés; Universidad de Antioquia
Cadavid-Sierra, Francisco; Universidad de Antioquia
Amell-Arrieta, Andrés; Universidad de Antioquia
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1141
Furnaces-simulation methods
heattransmission
mathematical models
es_ES
Simulations of combustion furnaces equipped with radiant burners are usually done assuming the presence of fully developed burning gases in the burners’ outlet. This assumption minimizes the computational cost of simulating hundreds of burners. However, it involves simulating a furnace where the development of combustion reactions is not taken into account, and the interaction of the geometry of the burners with the flow and temperature profiles inside the firebox is not considered. This work seeks to support the above simplification by comparing its impact to a methodology that gets closer to the actual operation of a furnace with hundreds of burners and makes it posible to model the combustion process. Results show that the simulations differ in wall temperatures, the power that reaches the load and the efficiency of firebox in: 1 K, 0.07 MW, and 0.3%.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1142
2020-10-17T23:29:40Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1142
2020-10-17T23:29:40Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 91 - 104
Characteristics of a tram-based massive electric transportation system
Article
Ríos-Mesías, Mario; Universidad de los Andes
Ramos-López, Gustavo; Universidad de los Andes
García-Mora, Gabriel; Universidad de los Andes
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1142
Electric substations
electric power distribution
electric driving
streetrailroads
es_ES
This paper presents the typical characteristics in a massive electric traction transportation system using trams, such as size, weight and passenger capacity. It also describes the characteristics of the electric supply, like AC or DC, and the connection means to the medium voltage electric power distribution system like, for example, rectifier substations. Finally, it presents a number of examples of cities where this transportation system is used.
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1143
2020-10-18T00:02:52Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1143
2020-10-18T00:02:52Z
Pontificia Universidad Javeriana
Vol. 15 No. 1 (2011): January-June; 197 - 218
Operation variables in the animal-fat transesterification process: a review
Article
Rojas-González, Andrés Felipe; Universidad Nacional de Colombia
Girón-Gallego, Erika; Empresa Manuelita
2011-03-16
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1143
Diesel fuels
transesterification
oils and fats
es_ES
This work presents a review of the literature about the influence of parameters such as temperature and time reaction, alcohol type, alcohol: fat molar ratio, catalyst type and concentration, mixed intensity, as well as free fatty acid and moisture concentration, on biodiesel production yield in chemical and biological transesterification of animal fats. It was found that the alcohol: fat molar ratio required by animal fat transesterification depends on the fat and the type of catalysis that are used in the process. It was also found that, under atmospheric pressure, the temperature must be below 50 °C in biocatalysis, 80 °C in homogeneous catalysis, and 250 °C in heterogeneous catalysis. Additionally, lipase from P. cepacia bacteria is the most widely used in biocatalysis of animal fats. It was also found that yield for beef tallow is between 50-95% (reaction time: 0.75-3 h); in the case of chicken fat, between 33-99% (0.5-1.5h); for fish oil, between 76-98% (0.17-1.5 h); for duck tallow, between 75-97% (3 h); for sheep tallow, between 90-98% (24 h), and, for pork tallow, 97% (0.3 h).
oai:ojs.revistas-javeriana.repositoriodigital.com:article/1287
2020-12-11T22:30:30Z
iyu:Art
driver
v2
https://revistas.javeriana.edu.co/index.php/iyu/article/view/1287
2020-12-11T22:30:30Z
Pontificia Universidad Javeriana
Vol. 16 No. 2 (2012): July-December; 363
Using Simulations for Risk Assessment in Electricity Markets
Article
Navas, Diego Fernando; Universidad del Valle
Lozano-Moncada, Carlos Arturo; Universidad del Valle
Manotas-Duque, Diego Fernando; Universidad del Valle
2012-10-30
This journal is registered under a Creative Commons Attribution 4.0 International Public License. Thus, this work may be reproduced, distributed, and publicly shared in digital format, as long as the names of the authors and Pontificia Universidad Javeriana are acknowledged. Others are allowed to quote, adapt, transform, auto-archive, republish, and create based on this material, for any purpose (even commercial ones), provided the authorship is duly acknowledged, a link to the original work is provided, and it is specified if changes have been made. Pontificia Universidad Javeriana does not hold the rights of published works and the authors are solely responsible for the contents of their works; they keep the moral, intellectual, privacy, and publicity rights.Approving the intervention of the work (review, copy-editing, translation, layout) and the following outreach, are granted through an use license and not through an assignment of rights. This means the journal and Pontificia Universidad Javeriana cannot be held responsible for any ethical malpractice by the authors. As a consequence of the protection granted by the use license, the journal is not required to publish recantations or modify information already published, unless the errata stems from the editorial management process. Publishing contents in this journal does not generate royalties for contributors.
url:https://revistas.javeriana.edu.co/index.php/iyu/article/view/1287
Electricity markets
risk management
simulation
Monte Carlo
es_ES
In this work, based on the results of acomputational tool designed and developedon a free use spreadsheet, riskmanagement techniques are applied toidentify, assess and control the financialrisks associated with participationin an electricity market such as theColombian one. This project takesplace in two stages. In the first stage,the simulation model was defined(using Monte Carlo simulation) fortwo of the actors in the market (generatorsand traders); using their profitmargins as the objective function. Inthe second stage, a computational toolimplemented in a spreadsheet wasused to simulate the marginal benefitof these agents. The results showthat the simulation tool can be usedto estimate losses or benefits (profitmargins) of agents according to theirdegree of risk aversion.
a33b11a720911fd5e1d88ef323f3cb65