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

Browse

Now showing 1 - 18 of 18

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; DIUC
The 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.
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; DIUC
This 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.
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, Edison
The 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.
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; DIUC
The 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.
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; DIUC
Web 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.
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; DIUC
In 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.
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; DIUC
In 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.
Metodología de análisis forense orientada a incidentes en dispositivos móviles
(Universidad de Cuenca, 2014) Pinto, Diego; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
The article addresses issues related to forensic analysis applied to mobile devices, as well as a proposal and test of a methodology that effectively support these activities. We describe the objectives of the study, and the search for evidence stored on mobile devices under a scenario in which a crime has been committed. Emphasis is on the evolution and multiplicity of uses currently on devices, and finally addresses the need for standards to ensure the integrity of the found evidence, describing the methodology developed which enables the complete forensic process on mobile devices. The presented approach could establish itself as a standard for this type of research.
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; DIUC
This 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.
Modelo origen destino para estimar el flujo de tráfico usando algoritmos genéticos
(Universidad de Cuenca, 2014) Aldás S., Milton R.; Flores C., Marco J.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
A new method, based on Artificial Intelligence for solving the Origin-Destination problem (O-D), was developed and applied to the vehicular traffic network of the city of Ambato. The method, based on genetic algorithms (GA), solves the minimization problem associated with the O-D problem. To validate the technique, it has been used the Mercado Modelo network from the Ambato city, which is an area of high vehicular traffic congestion.
Multi-class sentiment analysis using a hierarchical logistic model tree approach
(Universidad de Cuenca, 2014) Homsi, Masun Nabhan; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
This paper proposes a new hybrid system for multi-class sentiment analysis based on General Inquirer (GI) dictionary and a hierarchical Logistic Model Tree (LMT) approach. This new system consists of three layers, the Bipolar Layer (BL) is of one LMT (LMT-1) for classifying sentiment polarity, while the Intensity Layer (IL) comprises two LTMs (LMT-2 and LMT3) for detecting separately three positive and three negative sentiment intensities. Only in construction phase, the Grouping Layer (GL) is used to cluster positive and negative instances by employing 2 k-means respectively. In Pre-processing phase, the raw text data is subjected to a tokenizer, a tagger, a stemmer and finally to GI dictionary to count and label only verbs, nouns, adjectives and adverbs with 24 markers that are used later to compute feature vectors. In Sentiments Classification phase, feature vectors are first introduced to LMT-1, then they are grouped in GL according to class label, afterward these groups of instances are labeled manually, and finally positive instances are introduced to LMT-2 and negative instances to LMT-3. The three trees are trained and tested on Movie Review and SenTube datasets utilizing 10-folds stratified cross validation. LMT-1 yields a tree of 48 leaves and 95 of size with 90.88% of accuracy, while both LMT-2 and LMT-3 provide two trees of 1 leaf and 1 of size with 99.28% and 99.37% of accuracy respectively. Experiments show that the proposed hierarchical classification methodology gives a better performance compared to other prevailing approaches.
Necesidades percibidas por los clientes de un sistema CRM en empresas de compra online
(Universidad de Cuenca, 2014) Peña E., Alejandro; Mejia O., Juan P.; Valencia A., Jhoany A.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
The CRM is a tool that supports the management of solid and lasting relationships with customers so that the products and services that the company offers effectively fulfill the expectations of its customers and thus continuity is assured sales in a competitive environment like the present. The aim of this paper is to present the results of the market research that seeks to identify the main characteristics required from the point of view of the customer for a CRM system for the company ‘Antojos Saludables’, so that it will present a characterization of the clients or potential clients of the company and the expectations and perceptions of technological infrastructure issues such as security of online transactions, favorite means of payment for online purchasing, most used applications on platforms of online purchasing. To finally show some suggestions about suitable strategies for designing the information system that shall support the CRM of ‘Antojos Saludables’.
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; DIUC
This 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.
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; DIUC
The 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.
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; DIUC
Active 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.
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; DIUC
This 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.
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; DIUC
In 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.
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; DIUC
This 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.

Browse

Browsing Volumen 5 No. especial (2014) - TIC.EC: Congreso Ecuatoriano de Tecnologías de la Información y Comunicaciones by Author "DIUC"