Medellin, Colombia

Esumer University Institute

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Medellin, Colombia
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Sanchez-Alzate J.-A.,Esumer University Institute | Sanchez Torres J.A.,University of Barcelona
CISCI 2016 - Decima Quinta Conferencia Iberoamericana en Sistemas, Cibernetica e Informatica, Decimo Tercer Simposium Iberoamericano en Educacion, Cibernetica e Informatica, SIECI 2016 - Memorias | Year: 2016

Many purchasing decisions is associated with a level of risk caused for the uncertainty to the buyer faces and the possible negative consequences that may occur. Through an empirical study, and through statistical analysis, the relationship between customer orientation, social influence, reputation, privacy and its effect on the risk perceived by online shopping is explored; this in order to enable companies to develop more effective strategies to mitigate this barrier and thus, increased purchases electronically. © 2016, International Institute of Informatics and Systemics, IIIS. All rights reserved.


Gonzalez-Ruiz J.D.,Esumer University Institute | Gonzalez-Ruiz J.D.,National University of Colombia | Arboleda C.A.,University of Los Andes, Colombia | Botero S.,University of Los Andes, Colombia | And 2 more authors.
Advances in Transportation Studies | Year: 2017

In Colombia, Public-Private Partnerships have emerged as a tool for increasing the development of infrastructure projects for highways. These projects have focused on economic highways and have set aside the social ones. This article proposes a conceptual framework based on shadow toll schemes, cash flows, and the three bands proposed by the World Bank, which are used in this article as mechanisms for funding rural highway projects. Strategic financial indicators were considered in designing the proposal. Thus, it is appropriate to encourage both private investment and financial mechanisms to promote projects which will have a social impact. In addition, this article introduces new policies to be implemented by the Colombian government with the aim of encouraging private investors to invest in social highways. As a result, it is expected that this work will contribute to enhancing the financing process in Colombia. It is concluded that to increase the development of rural highways, the creation of a debt fund with an investment focus on social projects is mandatory. Future research opportunities on this topic are identified. © 2017, Aracne Ed. All rights reserved.


Sanchez-Alzate J.A.,Esumer University Institute | Sanchez-Alzate J.A.,National University of Colombia | Sanchez-Torres J.A.,University of Barcelona
DYNA (Colombia) | Year: 2017

Many purchasing decisions have an associated level of risk deriving from the uncertain environment facing the buyer and the possible negative consequences of an online purchase. Through an empirical study, using a regression analysis of latent variables and the ordinary Partial Least Squares (PLS) optimization technique, a model that represents the relationship between customer orientation, social influence, reputation, privacy and how they affect the perceived risk, is proposed. The purpose of this is to enable companies to develop more effective methods of reducing this barrier and create strategies to increase purchases through e-commerce. © The author; licensee Universidad Nacional de Colombia.


Cortes J.A.Z.,Esumer University Institute | Serna M.D.A.,National University of Colombia | Martinez S.P.M.,Corporacion de Ciencia y Tecnologia para la Industria Naval
DYNA (Colombia) | Year: 2012

This article shows the application of the decision support system (DSS) Expertchoice© for pick-up truck selection in a colombian shipyard company. The article begins with a description of such decision support systems, followed by a market availability analysis of such systems, and finally presents the application of the DSS Expertchoice © for pick-up truck selection in the company studied.


Cortes J.A.Z.,Esumer University Institute | Serna M.D.A.,National University of Colombia | Gomez R.A.,Polytechnic Jaime Isaza Cadavid
DYNA (Colombia) | Year: 2013

Transport is one of the most relevant elements for the competitiveness of companies and cities. An inadequate transportation system generates high costs and low customer service levels, which ultimately produces a negative economic impact for both. This article presents an overview of the technology tools that are part of the Intelligent Transportation Systems (ITS) used to improve the performance and safety of transport, not only of cargo but also of passengers, in different modes such as air, maritime, rail and road. This article begins with a description of ITS, followed by the presentations of their benefits and, finally, it presents a review of the different tools for ITS.


Best practices methodologies have been used by different companies as competitive growing tools in a globalized market. In Colombia, particularly in the Medellín Metropolitan Area (MMA) and Antioquia's eastern region,; it can be noticed that total productive management (TPM) has been adopted as a competitive support tool. This article evaluates the TPM implementation impact on different competitiveness variables for the companies that are working on it at the AMVA and near easterly regions, finding that there is not a clear relationship between the improvements reached and the main returns, efficiency and even in the results obtained in key business indicators such as overall equipment effectiveness (OEE), failures (breakdowns) and throughput.


Zapata Cortes J.A.,Esumer University Institute | Arango Serna M.D.,National University of Colombia | Adarme Jaimes W.,National University of Colombia
Ingenieria e Investigacion | Year: 2012

This paper shows fuzzy extended analytical hierarchy (FEAHP) applied to a warehouse management system (WMS) in a Colombian shipyard regarding selecting pertinent logistics software. The FEAHP method has been widely used for resolving decisionmaking problems where many quantitative and qualitative factors and variables are required. However the most important criticism of this method concerns the impossibility of including value judgments not on a continuous scale but rather on a discrete one which can be solved by fuzzy logic. This problem was resolved by using the fuzzy logic extension of the AHP method proposed by Chang in 1996 which was adapted for a specific context regarding a Colombian shipyard.


Duque E.,Esumer University Institute | Patino J.,National University of Colombia | Velez L.,National University of Colombia
International Journal of Renewable Energy Research | Year: 2016

Worldwide, power generation from fossil fuels is currently in jeopardy due to carbon dioxide emissions that directly influence the greenhouse effect and thus, climate change. This has led to seek or encourage the use of other sources of power generation, such as hydropower. Small Hydroelectric Plants (SHP) represent a suitable alternative for electric power generation in Colombia due to favorable conditions in its operation and the low environmental impact compared with other available energy sources in the country. SHPs, within the Clean Development Mechanism, are considered a source of clean energy with minimal impacts on the environment. This article presents a review of the existing methodologies for assessing greenhouse gas emissions and the implementation of the ACM0002 methodology in a SHP in Colombia, calculating an updated emission factor in the country. The results of this study show the potential for developing SHP projects thanks to the numerous mighty rivers which generate electrical power and contribute to sustainable rural development in Colombia.


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