Volumen 5 No. especial (2014) - TIC.EC: Congreso Ecuatoriano de Tecnologías de la Información y Comunicaciones
Permanent URI for this collectionhttps://dspace-test.ucuenca.edu.ec/handle/123456789/21329
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Item Servidor de comunicaciones unificadas con Raspberry Pi y Micro-Elastix(Universidad de Cuenca, 2014) Peláez, David; Tipantuña, Christian; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCThis paper shows the configuration and implementation of a unified communications server using a Raspberry Pi as the hardware platform and the Elastix distribution as software platform, specifically micro-Elastix which has been developed to work on ARM architectures.Item On the implementation of a Laboratory of Digital Television according to the ISDB-Tb standard(Universidad de Cuenca, 2014) Medina, J.; Villa, C.; Saquicela Galarza, Víctor Hugo; Espinoza Mejía, Jorge Mauricio; Astudillo, D.; Albán, H.; Palacio Baus, Kenneth Samuel; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCThis paper summarizes the implementation process of the Digital Television (DTV) Laboratory of the University of Cuenca according to the open television broadcasting ISDB-Tb standard, adopted by Ecuador in 2010. The Laboratory arises as a research and testing environment for Digital Television DTV signal transmission and interactive applications. The goal of this article is to document the aspects that have been considered to simulate a real DTV scenario where: a Transport Stream (TS) is first generated, then transmitted through the communication channel and finally, received in televisions using an ISDB-Tb receiver. The TS is formed by combining DTV audiovisual content and interactive applications. Therefore, it facilitates the development and testing of new services and allows taking full advantage of the characteristics of the new DTV adopted format.Item Sistema de conmutación y control de llamadas basado en OpenBTS y Asterisk(Universidad de Cuenca, 2014) Quiñones, Manuel; Tene, Juan Pablo; Rohoden, Katty; Carrión, Carlos; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCIn the present research, some open source tools of hardware and software are used in order to build a free cellular base station BTS, of low cost and easy implementation, starting with an investigation of the technical concepts about the mobile systems, and the voice over IP VoIP technology. Then the installation of a system called OpenBTS is performed. This system uses the USRP hardware; a radio SDR defined software deploying a free GSM network, providing the communication with any phone that supports this standard. The system enables to switch it as a user agent of the session Initiation protocol SIP from Asterisk computer program. The latter software is installed as a VoIP PBX system with several modules to integrate a switching system where telephone calls are executed between registered users.Item Despliegue de escenarios de entrenamiento en seguridad utilizando técnicas de virtualización con clonado rápido(Universidad de Cuenca, 2014) Pérez E., Ernesto; Bernal B., Paul F.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCThe training and constant preparation of the IT personnel is one of the most effective strategies to improve the quality, stability and security of networks and associated services. In this line, CEDIA has been implementing training courses and workshops for its members and within the CSIRT-CEDIA it has been considered the optimization possibility of the associated processes with the necessary infrastructure deployment to provide participants of these trainings, with appropriate personalized material in information security area. Thus we decided to use virtualization techniques to exploit the available resources, but even if by itself it isn't a new trend, the use of a complete copy of the virtual disk for each participant, is not only impractical in terms of time, but also in terms of the consumption of required storage. This work is aimed precisely to the consumption and time optimization associated with replication processes of the same machine and virtual disk for particular use of several participants.Item Diseño e implementación de un sistema de soporte de decisiones para el Centro de Documentación Regional “Juan Bautista Vázquez”(Universidad de Cuenca, 2014) Haro Valle, Valeria Alexandra; Pérez Rocano, Wilson Rodrigo; Sigüenza Guzmán, Lorena Catalina; Cattrysse, Dirk; Saquicela Galarza, Víctor Hugo; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCIn recent years, volume of library-related data has increased tremendously, as well as complexity of data sources and formats have been escalating. This information explosion has created a big challenge for data managing, archiving and accessing, especially in support of library decision-making. Knowing that a good library management involves integrating a number of strategic indicators, the implementation of a Data Warehouse (DW), that properly manages such amount of information and the complex mix of data sources, becomes an interesting alternative to be considered. This article describes the design and implementation of a decision support system based on a DW approach for the Regional Documentation Centre “Juan Bautista Vazquez”. To assure that all relevant data sources are included during the data analysis, the study utilizes a holistic methodology, previously proposed by Siguenza-Guzman et al. (2014) for an integrated library evaluation. This methodology assesses the library collection and services by incorporating important elements for library management, such as service performance analysis, service quality control, collection usage analysis, and information retrieval quality. Based on this data analysis, the study proposes a DW architecture to integrate, process and store the relevant data. These stored data are finally analyzed and visualized by the so-called online analytical processing (OLAP) tools. Initial tests of the implemented decision support system confirm the feasibility and effectiveness of the DW based approach, by successfully integrating multiple and heterogeneous sources, formats and varieties of information, permitting library managers to generate personalized reports, and even allowing to debug the day-to-day transactional processes.Item Propuesta de un modelo de evaluación bidimensional en Moodle(Universidad de Cuenca, 2014) Layedra L., Natalia P.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCThe two-dimension evaluation model (TEM) for higher education, proposed in this research work measures student’s knowledge versus their certainty. The analysis for these two dimensions allows teachers to emphasize certain areas with the students. This investigation was descriptive and correlational, besides, scientist and inductive methods were applied. Questionnaires and statistical analysis were used in the research. The technical resources used in this research work were: learning management system Moodle, mathematical analysis software MATLAB, EXCEL, labs in ESPOCH campus. TEM proposes the application of multiple selection questionnaires with CBM (Certainty based marking), on a virtual classroom created on Moodle. CBM measures on each question the two dimensions: knowledge and certainty.Item Aplicación de la metodología BPM: RAD en una institución de educación superior(Universidad de Cuenca, 2014) Calle, Xavier; Mayorga, Franklin; Flores, Ana; Lavín, José M.Organizations have to improve continuously their structures and processes. Business Process Management (BPM) is one of the most used instruments to achieve this. The introduction of this methodology ensures rationality and correct organizational behavior. The methodology is based on techniques, tools and standards implementable through ICTs, a fundamental tool in the new conception of public and private companies.Item WebQuest: Incidencia en el aprendizaje significativo para la educación superior(Universidad de Cuenca, 2014) Pomboza F., Cristina A.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCThis paper explores the use of the WebQuest Collaborative Project Based methodology on training students of the Mechanical Engineering School of the Polytechnic of Chimborazo (ESPOCH). For this purpose the WebQuest was applied to students between 18 and 22 years in the programming course. The research was cognitive-constructivist, descriptive, field, cross, applied basic science and under the scientific paradigm, policies and guidelines framed under the National Plan for Good Living 2013-2017. Using collaborative tools and Google Drive and Google Sites, the CHAEA test for learning styles, office tools and specialized software were applied to determine their impact on the learning capability of a sample of 54 students. Two techniques were applied: the t-Student to compare the academic performance and styles of learning behavior. With a 5% error and a tow-tailed critical point of 2,055, the following values were respectively obtained 4,382, 2,434 and 3,701. The Chi-square technique was applied to test the skills of the 21st century, with a critical point of 40,1, a calculated value of 119,84 was generated. Taking as reference the obtained results, it is concluded that the WebQuest methodology favors the generation of meaningful learning inside and outside the classroom.Item Buscando la excelencia educativa: gestión de procesos académicos y administrativos en instituciones públicas de educación mediante BPM(Universidad de Cuenca, 2014) Flores, Ana; Lavín, José M.; Calle, Xavier; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC; Alvarez, EdisonThe need to improve the efficiency of organizations has forced to adopt new management policies. This need has also come to public institutions, including universities. One possibility for improvement is the application of the Business Process Management (BPM) to public management. ICT provides the opportunity to implement this approach through a tool like a Business Process Management Suite (BPMS), which increases the benefits of the new management providing process automation, redesign and a continuous improvement. The case study is the implementation of a BPMS in a public educational institution in Ecuador to see how management is improved, achieving higher levels of quality and reduced processing times.Item Response toolkit to provide an active response against intrusions using Ontology-Based IRS(Universidad de Cuenca, 2014) Guamán, Danny S.; Caiza, Julio C.; Mateos, Verónica; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCActive response systems are intended to run an automatic response against an intrusion. However, running an automatic response is not a trivial task because the execution cost could cause a greater negative effect than the intrusion itself. Also, the system should have a broad set of responses and an algorithm to select the optimal response. This paper proposes a response toolkit that is integrated into an ontology-based IRS to allow automatic execution of the best response against a detected intrusion. A set of host-based and network-based responses that can be performed by an IRS is presented. The response execution is performed by several plugin-based agents that have been distributed over the network. The verification of this proposal is made in a defacement attack case with satisfactory results.Item Diseño y evaluación de una red de sensores para analizar entornos acuáticos(Universidad de Cuenca, 2014) Romero M., Gabriela A.; Chávez, Patricia; Ochoa, Daniel; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCIn aquaculture, shrimp growth and health are affected by changes in environmental and water quality parameters. Currently, parameter data is colleced manually. This paper proposes a wireless sensor network to collect automatically water parameter related data in shrimp farms. A mesh topology was used in the network implementation. This topology increases data transmission reliability. To reduce power consumption off-the-shelf hardware modules with energy saving mode were used. Nodes were placed on floating platforms to collect and transmit water temperature data at various rates. The sensor network was tested in lab and field environments (tanks and farms). The results obtained so far are encouraging and demonstrate the possibilities of exploiting low-cost electronic hardware for smart aquaculture applications.Item Plataforma Cloud para monitoreo remoto de sistemas fotovoltaicos aislados en el Ecuador(Universidad de Cuenca, 2014) Manzano, Santiago; Peña-Ortiz, Raúl; Guevara, David; Ríos, Alberto; Universidad de Cuenca; Dirección de Investigación de la Universidad de CuencaPhotovoltaic systems are typical renewable energy sources that generate electricity from solar radiation. Monitoring isolated PV systems is necessary to provide information that allows their holders to maintain, operate and control these systems, reducing installations costs and avoiding unwanted electric power disruptions in isolated areas. This paper propose a development of cloud-based platform for monitoring the isolated PV systems in Ecuador with the aim of develop an extreme scalable solution based on open source software, low consumption wireless sensors, and ‘Software as a Service’ (SaaS) paradigm to process, manage and publish the information for a Ecuadorian solar control center.Item Análisis de rendimiento y profiling del modelo WRF en un clúster HPC(Universidad de Cuenca, 2014) Gualán S., Ronald M.; Solano-Quinde, Lizandro D.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCThe Weather Research and Forecast (WRF) model is a fully functional modeling system that supports atmospheric research and weather prediction. WRF was developed with emphasis on efficiency, portability, maintainability, scalability and productivity, allowing it to be successfully implemented in a wide variety of HPC equipment. Therefore, the size of the problems supported by WRF has increased, so the understanding of the WRF’s dependence on the various elements of the cluster, such as CPU, networking and libraries are crucial to enable efficient forecasting and high productivity. In this context, this manuscript examines WRF scalability in HPC equipment, taking into account three parameters: number of CPUs and nodes, communications and libraries. Two benchmarks carried out on a cluster of high performance provided with a GigaEthernet network, allow to establish the relationship between scalability and the three parameters studied, particularly WRF demonstrates sensitivity to inter-node communication. This factor is essential for maintaining the scalability and increasing productivity by adding nodes to the cluster.Item Mejorando la visibilidad de sitios web usando tecnología semántica(Universidad de Cuenca, 2014) Montenegro, Lenin; Ochoa, Verónica; Espinoza Mejía, Jorge Mauricio; Universidad de Cuenca; Dirección de Investigación de la Universidad de CuencaThe visibility of a website involves the process of improving the position of the site in the results returned by search engines such as Google. There are many companies competing aggressively for the top position in popular search engines. As a general rule, the sites that appear higher on the search results tend to get more traffic in Web pages, and thus potentially more business. This article describes the main models to enrich the search results with information such as dates or locations; key-value type information that allows the user to interact with the contents of a Web page directly from the search results. The main contribution of this paper is to show the usefulness of different markup formats to enrich fragments of a Web page in order to help companies that are planning to deploy semantic enrichment methods on the structuring of their websites.Item Sistema de recomendación de contenidos audiovisuales: Algoritmo de inferencia semántica(Universidad de Cuenca, 2014) Avila, J.; Riofrío, X.; Palacio Baus, Kenneth Samuel; Espinoza Mejía, Jorge Mauricio; Saquicela Galarza, Víctor Hugo; Universidad de Cuenca; Dirección de Investigación de la Universidad de CuencaThis article presents the analysis of a Semantic Inference Algorithm used in an Audiovisual Content Recommender System in the domain of Digital Television. The obtained results show that the inclusion of distinct semantic properties and their combinations lead to a considerable reduction of the Mean Absolute Error (MAE) obtained for user rating prediction computation and that the semantic property Actor has the major influence over recommendation estimation.Item Una aproximación basada en Linked Data para la detección de potenciales redes de colaboración científica a partir de la anotación semántica de producción científica: Piloto aplicado con producción científica de investigadores ecuatorianos(Universidad de Cuenca, 2014) Piedra, Nelson; Chicaiza, Janneth; Cadme, Elizabeth; Guaya, Richar; Universidad de Cuenca; Dirección de Investigación de la Universidad de CuencaIn this paper, a framework based on semantic Web technologies is presented to detect potential collaboration networks. The collaborators are identified through a semantic enrichment of scientific articles produced by researchers who publish with Ecuadorian affiliations. The scope of this work includes the papers, which have at least one author with Ecuadorian membership. Detected collaborative networks are an important basis to promote the efforts of the Ecuadorian government and higher education institutions, in order to prioritize the efforts and the resources invested in research and determine the relevance and coherence of the research programs.Item Una aproximación para la descripción semántica de requisitos para categorización docentes de investigadores Ecuatorianos(Universidad de Cuenca, 2014) Cadme, Elizabeth; Piedra, Nelson; Universidad de Cuenca; Dirección de Investigación de la Universidad de CuencaThe new generation of the Web, the Semantic Web, poses potential opportunities to give meaning to web content. In this paper a framework is presented for ontology network to represent concepts, attributes, operations and restrictions related to curricular items used in national categorization processes of Ecuadorian university teachers. The first part of the paper describes the domain context and related work, the following the abstraction of the model is described, and finally ontology is presented. The domain ontology provides the concepts meaning and their relationships within the domain of curricular items produced by academics, which are requirements of university teaching categorization process in Ecuador.Item Detección automatizada de desfiguraciones en un sitio web mediante una solución basada en Software Libre(Universidad de Cuenca, 2014) Bernal B., Paul F.; Chafla A., Gustavo X.; Pérez E., Ernesto; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCWeb site defacements are one of the most popular attacks nowadays and rely on making a change in a web site's HTML code, which is presented as a visual change on the site. In this paper it is proposed to develop a system for detecting and/or reporting such changes in an early and automated way. Free Libre Open Source Software (FLOSS) offers the ability to create solutions and is the framework on which a solution is proposed.Item Aplicación de SPEA2 al cálculo de esquemas de dosificación para el tratamiento quimioterapéutico del cáncer(Universidad de Cuenca, 2014) Jordán Villamar, Carlos; Valderrama Saltos, Ismael; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCThis paper presents the application of SPEA2 to calculate optimal dosage schemes for the chemotherapeutic treatments of tumors, where such schemes consists in the specification of several cytotoxic agents, its frequencies and doses to be administered. In this optimization problem, the calculated schedules should optimize more than one objective at the same time: not only tumor size but also the toxicity that remains after the treatment, cost, etc. SPEA2 is a genetic algorithm that applies the Pareto optimality criterion to calculate an approximation to the Pareto frontier, from which the user can choose the "best" or more appropriate solution. In this work a software tool was developed: SoT-Q. It has two main modules: an optimizer that calculates optimal dosage schemes and a simulator that applies these schedules to a simulated patient with a tumor; the functioning of the simulator is based on a pharmacodynamic model to represent the tumor. In the future, once SoT-Q is extensively tested and debugged, this computer program could assist oncologists in decision making about chemotherapy treatments; it could also serve as a teaching aid in training new health professionals. Results obtained using this tool were very good; in all test cases, both tumor size and residual toxicity at the end of treatment were reduced significantly; even more, in some examples the reduction was of three orders of magnitude.Item Un modelo de predicción de tráfico en la ciudad de Ambato(Universidad de Cuenca, 2014) Pilamunga P., Marcelo; Ríos Insua, David; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUCThis paper reports the results of an initial study about a traffic prediction model, which attempts to complement city decisions by providing a good road planning. The prediction of traffic flows and the identification of intersections with major problems within the road network might enable identifying timely solutions. A support tool in decision-making regarding traffic will reduce costs in time, fuel, pollution, etc. The study uses linear dynamic models to forecast the traffic flow in the city and points where traffic saturation is likely to occur, so that timely actions can be taken to reduce traffic pressure before jams occur.