https://repositorio.uisek.edu.ec:443/handle/123456789/2760 Tue, 07 Apr 2026 19:26:59 GMT 2026-04-07T19:26:59Z https://repositorio.uisek.edu.ec:443/handle/123456789/5745 Título : La evaluación como motor de innovación en la gestión de seguridad y salud en el trabajo Autor : Guzmán Galarza, Franz Wed, 01 Oct 2025 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/5745 2025-10-01T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/5590 Título : Perfil de la seguridad y salud en el trabajo: República del Ecuador Autor : Gómez Garcia, Antonio Ramón; Silva-Peñaherrera, Michael; Merino Salazar, Pamela Alexandra; Benavides, Fernando G Resumen : Este Perfil de Seguridad y Salud en el Trabajo (SST) sigue la Recomendación 197 (R197) de la Organización Internacional del Trabajo (OIT), en relación con el Convenio sobre el marco promocional para la seguridad y salud en el trabajo de 2006, y su objetivo principal es examinar el sistema de SST de la República del Ecuador con la finalidad de hacer un diagnóstico lo más completo que sea posible con la información disponible, y proponer recomendaciones que puedan ser de utilidad para mejorar y proteger la salud de las personas que trabajan en Ecuador. Wed, 01 Jan 2025 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/5590 2025-01-01T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/5424 Título : Medium temperature phase change materials thermal characterization by the t-history method and differential scanning calorimetry Autor : Gaona, David; Urresta, E.; Martínez Gómez, Javier; Guerrón, Gonzalo Resumen : This paper presents a thermal characterization of salt mixtures applying the T-History Method and the Differential Scanning Calorimetry (DSC) techniques. By using water as a standard substance, the original T-History method was developed to analyze materials with melting points under 100°C. This is the first research that proposes to replace water by glycerin to characterize medium melting temperature PCMs (140-220°C). Moreover, the DSC technique was used to validate and compare the results obtained with the T-history method for each mixture. For instance, the system compound of 40% KNO3 – 60% NaNO3 was studied, and the enthalpy of fusion determined by THM and DSC differs by 2.1% between each method. The results given by the two methods for all mixtures showed that both techniques are complementary and present satisfactory agreement with the specialized literature. Sun, 01 Jan 2017 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/5424 2017-01-01T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/5423 Título : Analysis of LPG, electric and induction cookers during cooking typical Ecuadorian dishes into the national efficient cooking program Autor : Martínez-Gómez, Javier; Ibarra, D.; Villacis, S.; Cuji, P.; Cruz, P.R. Resumen : This research aims to analyze cooking parameters in liquefied petroleum gas (LPG), electric resistance and induction stoves for eight dishes of the Ecuadorian cuisine. During tests, it has been monitored the temperature, time, electrical grid parameters, concentrations of CO and CO2. In addition it has been studied the microbiological and physiochemical changes produced by the thermal treatment in food and a discriminative triangular test for determining the differences in the consumers perception between samples made with induction and LPG based stoves. The results showed which even with an exhaust hood working, there was still a significant value of concentration of CO and CO2 during cooking with a LPG stoves. As a result of these analyses the induction stove shows a better response during the heating process and energy efficiency which have influence in temperatures, taste, vitamin preservation, cooking times, energy consumption and cost to the user. Mon, 01 Feb 2016 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/5423 2016-02-01T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/5422 Título : Thermal natural convection analysis of olive oil In different cookware materials for induction stoves Autor : Kastillo, J. P.; Martínez-Gómez, Javier; Villacis, S. P.; Riofrio, A. J. Resumen : This manuscript describes the analysis of temperature and the distribution of natural convection flow of three different cookware materials composed of stainless steel, aluminum and enameled iron, when heating olive oil. A Computational Fluid Dynamic (CFD) software, called COMSOL Multiphysics©, has been used to analyze the heat transfer process for this study. In addition, a thermographic camera and a particle tracer were employed to compare the measurements of temperature, heat transfer and flow velocity, obtained from the CFD analysis. The results demonstrated that the enameled iron was the best choice of cookware material for induction stoves, as with the increment of oil temperature, this material had the biggest contrails and oil velocity convection flow in the center of the cookware. Thu, 09 Feb 2017 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/5422 2017-02-09T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/4203 Título : Material selection, simulation and validation for cop coils high voltage spark plug boots insulators Autor : Martínez Gómez, Javier; Portilla, Eduardo; Espinosa Aguilar, Juan Gabriel; Moreno, Gustavo Resumen : The following research presents the study and selection of an alternative composite material to manufacture electrical insulation devices for the high voltage circuit of Otto cycle internal combustion engines, better known as gasoline engines. High voltage insulators are generally made of materials such as rubber or silicone, whose material, when subjected to high temperatures, suffers technical degradation, causing electric power leaks and engine power losses. The purpose of this study is to suggest a composite material, with which only these insulating bodies can be manufactured. To do this, multicriteria selection techniques are used while the results are validated by virtual simulation of thermal character and normed experimental tests. Sun, 22 Nov 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/4203 2020-11-22T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/4202 Título : Clustering analysis of electricity consumption of municipalities in the province of Pichincha-Ecuador using the k-means algorithm Autor : Llanes Cedeño, Edilberto Antonio; Núñez Barrionuevo, Oscar F.; Martínez Gómez, Javier; Guachimboza Dávalos, Jorge I.; López Villada, Jesús Resumen : This work shows an analysis of electricity consumption by parishes in the province of Pichincha to define consumption affinities between them. To do this, categorical variables are encoded to be used AQ1 with the unsupervised machine learning algorithm k-means. As relevant results, four types of consumption are established and they are analyzed in relation to population density while algorithm represents 100% of the variability of the data, and municipalities with different consumption trends are identified. Wed, 11 Nov 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/4202 2020-11-11T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/4201 Título : Prediction of monthly electricity consumption by cantons in Ecuador through neural networks: a case study Autor : Llanes Cedeño, Edilberto Antonio; Guachimboza Davalos, Jorge I.; Rubio Aguiar, Rodolfo J.; Peralta Zurita, Diana Belén; Núñez Barrionuevo, Oscar F. Resumen : Abstract. The present work shows a multivariate regression through deep learning related to energy consumption in the province of Pichincha- Ecuador in relation to its cantons. This is done to establish consumption habits in relation to the existing population. For this, a data preprocess- ing stage was implemented and later an artificial neural network of a hidden layer and 15 neurons. As a result, a mathematical model with an absolute error of 2.2 % is obtained. Wed, 11 Nov 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/4201 2020-11-11T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/4200 Título : La salud ocupacional en Ecuador: una comparación con las encuestas sobre condiciones de trabajo en América Latina Autor : Merino Salazar, Pamela Alexandra; Silva Peñaherrera, Michael; Benavides, Fernando G.; López Ruiz, María; Gómez García, Antonio Ramón Resumen : Introduction: Ecuador has recently implemented its First Working Conditions Survey. Objective: to describe working and employment conditions and workers’ health status in Ecuador in a sample that allows comparison with previous Latin American surveys. Methods: a sample of 1,713 workers was drawn from the First Working Conditions Survey in Ecuador. Prevalence and a 95% confidence Interval (95%CI) were calculated and compared with previous Latin American surveys in Colombia, Argentina, Chile, Central America, and Uruguay. Results: men were more often exposed to hazardous working conditions, with noise (81% of men and 69% of women), and repetitive movements (56% and 48%, respectively) being the most frequently reported. About 31% of men and 19% of women worked more than 40 hours per week. Almost 11% of both women and men reported poor self-perceived health status. The prevalence of occupational injury was the highest in the region: 15% for men and 8.4% for women. Conclusions: this is a first approach to the working and employment conditions and workers’ health status in Ecuador. To harmonize and improve Working Conditions Surveys in Latin America should be a priority goal for enhancing regional occupational health surveillance. Descripción : Introducción: Ecuador ha realizado recientemente su primera encuesta sobre las condiciones de trabajo. Objetivo: describir las condiciones de trabajo y empleo y el estado de salud de los trabajadores en Ecuador en una muestra que permita la comparación con encuestas anteriores en América Latina. Métodos: se seleccionó una muestra de 1.713 trabajadores de la Primera Encuesta de Condiciones de Trabajo en el Ecuador. Se calculó la prevalencia y el intervalo de confianza del 95% (IC95%) y se comparó con las encuestas anteriores realizadas en América Latina – Colombia, Argentina, Chile, América Central y Uruguay. Resultados: hombres se exponen con mayor frecuencia a condiciones de trabajo peligrosas, siendo las más frecuentes el ruido (81% de los hombres y 69% de las mujeres) y los movimientos repetitivos (56% y 48%, respectivamente). Alrededor del 31% de los hombres y el 19% de las mujeres trabajan más de 40 horas por semana. Casi el 11% de las mujeres y de los hombres reportaron mala salud autopercibida. La prevalencia de lesiones ocupacionales fue la más alta de la región: el 15% para los hombres y el 8,4% para las mujeres. Conclusiones: este es un primer acercamiento a las condiciones de trabajo y empleo y al estado de salud de los trabajadores en el Ecuador. Armonizar y mejorar las Encuestas de Condiciones de Trabajo en América Latina debería ser un objetivo prioritario para mejorar la vigilancia de la salud ocupacional en esta región. Tue, 11 Aug 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/4200 2020-08-11T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3996 Título : Evaluación de la conducción eficiente en un motor de encendido provocado, a 2810 msnm Autor : Leguísamo-Milla, Julio César; Llanes-Cedeño, Edilberto Antonio; Celi-Ortega, Santiado F.; Rocha-Hoyos, Juan Carlos Resumen : In the present work, is characterized the application of efficient driving with respect to normal driving for the evaluation of polluting emissions and the fuel economy of internal ignition combustion engine at 2810 masl, as case study used a 1498 cm3 cylinder vehicle with indirect gasoline injection. The tests were performed on a chassis dynamometer applying the cycle Japanese Mode 10-15; through experimentation, the specific fuel consumption and the concentrations of CO, HC and NOx were obtained, with these emission data the factors of each polluting gas were calculated. The results obtained reveal that the fuel consumption and the emission factor of nitrous oxides (NOx) are reduced by 19.8% and by 10% respectively when applying efficient driving in relation to normal driving. In the case of the carbon monoxide emission factor CO and HC, the differences are not significant. Descripción : En el presente trabajo, se caracteriza la aplicación de la conducción eficiente con respecto a la conducción normal para la evaluación de las emisiones contaminantes y de la economía de combustible de un motor de combustión interna de encendido provocado, a 2810 msnm. Como estudio de caso se utilizó un vehículo de cilindraje 1498 cm3 de inyección indirecta a gasolina. Se realizaron las pruebas en un dinamómetro de chasis aplicando el ciclo Japonés Modo 10-15. Mediante la experimentación se obtuvo el consumo específico de combustible y las concentraciones de CO, HC y NOx. Con estos datos de emisión se calcularon los factores de cada gas contaminante. Los resultados obtenidos revelan que el consumo de combustible y el factor de emisión de óxidos nitrosos (NOx) se reducen en un 19.8 % y en un 10 % respectivamente al aplicar una conducción eficiente en relación a una conducción normal. Para el caso del factor de emisión de monóxido de carbono CO y HC las diferencias no son significativas. Sat, 01 Feb 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3996 2020-02-01T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3995 Título : Parámetros del múltiple de escape para su diseño computacional: una revisión Autor : Llanes-Cedeño, Edilberto Antonio; Guamán, Edwin R.; Celi-Ortega, Santiago F.; Rocha-Hoyos, Juan Carlos Resumen : The objective of this article was to analyze the working variables of an exhaust manifold, from a review of the different techniques applied to modeling and validation, to determine the essential parameters in the operation of the exhaust manifold. The defined process was applied based on methods, design variables, performance and the current trend in computational fluid dynamics. The utility of the model was evaluated for the application of optimization based on the objective component, thermal calculations, boundary conditions, materials for structural analysis and fatigue, in an integral manner. Therefore, a tubular design has better characteristics of gas evacuation compared to conventional collectors. This works represents a contribution for improving the performance of the vehicle. Additionally, a proposal for the rapid and efficient design of the multiple exhaust was generated. Descripción : El objetivo de este artículo fue analizar las variables de trabajo del múltiple de escape, a partir de una revisión de las distintas técnicas aplicadas a la modelación y validación, para determinarse los parámetros esenciales en la operación del múltiple de escape. El proceso definido se aplicó en función de métodos, variables de diseño, prestaciones y la tendencia actual en la dinámica de fluidos computacional. La utilidad del modelo se evaluó para la aplicación de optimización en función del componente objetivo, cálculos térmicos, condiciones de contorno, materiales para su análisis estructural y a fatiga, de forma integral. Por tanto, un diseño tubular posee mejores características de evacuación de los gases comparado con los colectores convencionales. El trabajo representa un aporte integral para mejorar el desempeño del vehículo. Además, se generó una propuesta para el diseño rápido y eficiente del múltiple escape. Sun, 01 Dec 2019 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3995 2019-12-01T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3994 Título : Caracterización del diseño de la suspensión inclinable para vehículos de movilidad personal Autor : Llanes-Cedeño, Edilberto Antonio; Maldonado-Páez, Fernando E.; Guerrón-López, Gonzalo E.; Rocha-Hoyos, Juan Carlos Resumen : This article studies the process of design and implementation of tiltable suspensions in narrow cars. Narrow cars are a new type of vehicle that could solve the problems of congestion, environmental pollution, and lack of parking spaces in cities. However, the size of narrow cars does not only bring benefits, but it also carries challenges on the implementation of tiltable suspensions. To study the implementation of tiltable suspensions on narrow cars, is performed an exploratory investigation using data from previews studies on the subject and is applied the PRISMA Declaration. Our analysis compared previously built and proposed tiltable suspension models, including their respective mechanism designs control systems. We established a design, an implementation, and a control and simulation process for tiltable suspensions. Comparison between traditional methods and simulation software showed that simulation software can assist on testing the mathematical model. Descripción : El presente artículo estudia el proceso de diseño e implementación de las suspensiones inclinables en coches angostos. Los coches angostos son un nuevo tipo de automóvil que podría llegar a solucionar los problemas de congestión, la contaminación ambiental y falta de espacios de estacionamiento en las urbes. Sin embargo, sus dimensiones no solo acarrean beneficios, ya que presentan inconvenientes en la implementación de suspensiones activas inclinables. Para estudiar la implementación de las suspensiones activas inclinables se realiza una investigación exploratoria, empleando estudios acerca del tema y aplicando la Declaración PRISMA. Se realizó un análisis explicativo entre varios modelos construidos y propuesto de suspensión, con respecto al diseño del mecanismo y su sistema de control, estableciéndose un proceso de diseño, implementación, control y simulación. Al evaluar los métodos tradicionales y programas de simulación se concluye que estos últimos ayudan a realizar la comprobación del modelo matemático. Mon, 01 Jun 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3994 2020-06-01T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3993 Título : Development of a light-tracking and -redirecting system actuated by hand-gesture recognition Autor : Liu Cheng, Alexander; Llorca Vega, Néstor Andrés; Latorre, Galoget; Coba, Daniel Resumen : This paper presents a context-aware light- tracking and -redirecting system guided by hand-gesture recognition. It is conceived as yet another mechanism within an ongoing development of a more intuitive and technically sophisticated Ambient Intelligence / Active and Assisted Living ecosystem. The detailed system consists of individual nodes that are strategically installed across regions of a building- envelope, which enables this latter to draw or deflect direct natural light into or away from specific locations within the built-environment as requested by the user(s) via recognized hand-gestures. Each node is capable of sending and receiving sensed-data continuously via ZigBee with one another as well as with microcontrollers embedded within the interior built- environment. Said microcontrollers are equipped with cameras via which four hand-gestures may be recognized. The first or initializing hand-gesture engages the system and enables it to recognize any of the remaining hand-gestures. The second redirects light towards the position of the detected hand-gesture, while the third redirects it away from said position. Finally, the fourth gesture turns the light-tracking and -redirecting system off. Thu, 18 Apr 2019 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3993 2019-04-18T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3992 Título : Development of a smart sleeve control mechanism for active assisted living Autor : Liu Cheng, Alexander; Santos, Caio; Santos, Pedro; Llorca Vega, Néstor Andrés Resumen : This paper describes the development of a Smart Sleeve control mechanism for Active Assisted Living. The Smart Sleeve is a physically worn sleeve that extends the user’s control capability within his/her intelligent built-environment by enabling (1) direct actuation and/or (2) teleoperation via a virtual interface. With respect to the first, the user may point his/her sleeve-wearing arm towards a door or a window and actuate an opening or a shutting; or towards a light and effect its turning on and off as well as regulating its intensity; or even towards a particular region to initiate ventilation of it. With respect to the second, the user may engage actuations in systems beyond his/her field of vision by interacting with a virtual representation of the intelligent built-environment projected on any screen or surface. For example, the user is able to shut the kitchen’s door from his/her bedroom by extending the Smart Sleeve towards the door of a virtual representation of the kitchen projected (via a standard projector and/or television monitor) on the bedroom’s wall. In both cases, the Smart Sleeve recognizes the object which the user wishes to engage with— whether in the real or the virtual worlds—(a) by detecting the orientation of the extended arm via an Accelerometer / Gyroscope / Magnetometer sensor; and (b) by detecting a specific forearm muscle contraction via Electromyography caused by the closing and opening of the fist, which serves to select the object. Once the object is identified and selected with said muscle contraction, subsequent arm gestures effect a variety of possible actuations for a given object (e.g., a window may be opened / shut or dragged to differing degrees or aperture; a light’s intensity may be increased or decreased, etc.). In cases of ambiguous selections, the user my use voice- commands to explicitly identify the desired object of selection. Furthermore, due to this voice-based recognition mechanism, which recognizes both spoken commands as well the identity of the speakers, different rights to actuation may be assigned to different users. The Smart Sleeve is yet another mechanism integrated into an on-going development of a highly intuitive Active and Assisted Living implementation and its features, ones explicitly designed to enhance user-experience as well as to promote user well-being via intuitive interactions between human and non-human agents within the intelligent built- environment. Thu, 18 Apr 2019 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3992 2019-04-18T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3991 Título : Development of an adaptive rainwater-harvesting system for intelligent selective redistribution Autor : Liu Cheng, Alexander; Morán Silva, Luis; Real Buenaño, Martín; Llorca Vega, Néstor Andrés Resumen : This paper presents an adaptive rainwater- harvesting (RWH) system based on a rainwater-collecting unit that (1) ascertains baseline water-quality in its collected rainwater via Ph- and turbidity sensors, and (2) redistributes it to designated toilet-tanks and/or irrigation points. Each unit is integrated with an XBee S2B antenna to enable cost-effective and energy-efficient mesh capabilities for inter-unit communication when two or more units conform the system. Moreover, each unit is also an Internet-of-Things (IoT) device that transmits water-tank levels and sensor-data to a local supervising microcontroller (MCU) via Open Sound Control (OSC). This MCU is, in turn, capable of communication with a cloud-based data plotting / storing and remote-control platform—viz., Adafruit IO—via Message Queueing Telemetry Transport (MQTT). The interface with Adafruit IO enables a remote administrator (a) to monitor water-tank levels and sensor readings, and (b) to execute manual overrides in the system—for example, any or all of the units may be shut-down remotely. When only one unit conforms the system, its water- tank services the toilet-tanks and/or irrigation points connected to the unit. When two or more units conform the system, their water-tank outputs are physically linked, enabling any unit to contribute to the servicing of a variety of connected toilet-tanks and/or irrigation points. In both single or multi-unit configurations, water redistribution is impartial to any end- point at initialization, yet over time the system identifies which end-point(s) require(s) water with a higher frequency and selectively prioritizes servicing to it/them to guarantee prompt refill / supply. The present work is part of ongoing developments of features and services that attempt to imbue the built- environment with intelligence via Information and Communication Technologies (ICTs). Tue, 01 Jan 2019 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3991 2019-01-01T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3990 Título : Regression Models Comparison for Efficiency in Electricity Consumption in Ecuadorian Schools: A Case of Study Autor : Rubio-Aguilar, Jefferson; Toapanta-Lema, Alejandro; Gallegos, Walberto; Llanes-Cedeño, Edilberto; Carrascal-García, Jorge; García-López, Letty; Rosero-Montalvo, Paul D. Resumen : Consumption forecast models with their proper billing allow establishing strategies to avoid overloads in systems and penalties for high consumption. This paper presents a comparison of multivariate data prediction models that allow detecting the final monthly cost of electricity consumption in relation to the different billing parameters. As relevant results, it was obtained that the models based on decision support machines have a better sensitivity when compared with different metrics that evaluate the prediction error with training set improved by backward elimination criteria. Tue, 03 Mar 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3990 2020-03-03T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3989 Título : Análisis de las variables que afectan la operación del catamarán solar en las Islas Galápagos Autor : Martínez-Gómez, Javier; Moya, Marcelo; Narváez, Ricardo; Guerrón, Gonzalo Resumen : The Galapagos Islands ecosystem has a great biodiversity and endemism, which is greatly affected by different human activities present in the islands. Maritime passenger transport on the Itabaca Canal is based on vessels with combustion engines, consuming an annual average of 4200 gallons of fuel that produce about 38 tons of CO2 per year. In this sense, the operation of the INER 1 solar-powered electric catamaran is a sustainable and renewable model for maritime passenger transport within the Galapagos Islands. This transport system is influenced by different variables of the social, environmental - seasonal and energy type that need to be evaluated to analyze which of them is the one that most influences its operation and why its importance. To this end, it has been proposed to use the attribute selection method to handle the data in an adequate manner and to predict efficiently the effects of each of them on the vessel. Based on the aforementioned it is proposed to carry out a bibliographic review on the variables that most influence or in the operation of the solar catamaran “INER 1” in the Galapagos Islands. Descripción : El ecosistema de las Islas Galápagos posee una gran biodiversidad y endemismo, lo cual se ve afectado en gran medida por diferentes actividades humanas presentes en las islas. El transporte marítimo de pasajeros en el canal de Itabaca se basa en embarcaciones con motores de combustión, consume un promedio anual de 4200 galones de combustible que producen alrededor de 38 toneladas de CO2 por año. En este sentido, la operación del catamarán solar INER 1 de propulsión eléctrica es un modelo sustentable y renovable para el transporte marítimo de pasajeros dentro de las Islas Galápagos. Dicho sistema de transporte se ve influenciado por diferentes variables del tipo social, ambiental - estacional y energético que requieren ser evaluadas para analizar cuál de ellas es la que más influye en su funcionamiento y el porqué de su importancia. Para ello se ha planteado utilizar el método de selección de atributos para manejar los datos de forma adecuada y predecir de manera eficiente los efectos de cada una de ellas sobre la embarcación. En base a lo mencionado se propone realizar una revisión bibliográfica sobre las variables que más influencian o en la operación del catamarán solar “INER 1” en las Islas Galápagos. Fri, 01 Mar 2019 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3989 2019-03-01T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3988 Título : Estudio bibliométrico de los artículos publicados en revistas ecuatorianas indexadas en latindex sobre seguridad y salud en el trabajo Autor : Ferrer Villalobos, Michelle; Ruíz, Sonia; Gómez García, Antonio Ramón; Vilaret Serpa, Aimeé; Freire, Luis Resumen : This study is a bibliographic review whose purpose is to highlight the scant work and research in the different disciplines of occupational safety and health at the local level. OBJECTIVE. Contribute to the scientific activity in occupational safety and health and knowledge about the evolution and trends, as well as the topics of greatest interest published in the Ecuadorian journals indexed in the Latindex Catalog. MATERIAL AND METHODS. We identified and selected those current and on-line journals, a total of 41 original scientific articles have been recovered from 18 indexed Ecuadorian journals. We excluded those theoretical articles, reflection, opinion, debate, editorial and letter to the editor. RESULTS. There is a growing trend (R2 = 0.522), especially in 2017, of which the disciplines of greatest interest are Psychosociology, Occupational Safety and Occupational Medicine, with the least interesting research being Ergonomics and Industrial Hygiene. DISCUSSION AND CONCLUSIONS. The scientific production in health and safety at work in Ecuador is scarce. A research culture should be fostered from the first years of training with solid foundations that allow the production of scientific material relevant to health and safety at work that is published in Ecuadorian journals and thus reliable data that allows us to make public policies. Descripción : Este estudio es una revisión bibliográfica cuyo propósito es evidenciar los escasos trabajos e investigaciones en las diferentes disciplinas de la seguridad y salud ocupacional a nivel local. OBJETIVO. Contribuir a la actividad científica en seguridad y salud en el trabajo y conocimiento sobre la evolución y tendencia, así como, las temáticas de mayor interés publicadas en las revistas ecuatorianas indexadas en Catálogo Latindex. MATERIAL Y MÉTODOS. Se identificaron y seleccionaron aquellas revistas vigentes y on-line, se han recuperado un total de 41 artículos científicos originales de 18 revistas ecuatorianas indexadas. Se excluyeron aquellos artículos teóricos, de reflexión, opinión, debate, editorial y carta al editor. RESULTADOS. Se observa una tendencia creciente (R2=0,522), sobre todo en el año 2017, de los cuales las disciplinas de mayor interés son Psicosociología, Seguridad en el trabajo y Medicina del Trabajo, siendo las de menor interés investigativo Ergonomía e Higiene Industrial. DISCUSIÓN Y CONCLUSIONES. La producción científica en seguridad y salud en el trabajo en Ecuador es escasa. Se debe fomentar una cultura investigativa desde los primeros años de formación con bases sólidas que permitan la producción de material científico relevante para la seguridad y salud en el trabajo que esto se publique en revistas ecuatorianas y así existan datos fiables que nos permitan realizar políticas públicas. Wed, 29 May 2019 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3988 2019-05-29T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3987 Título : SPATIAL - TEMPORAL ANALYSIS OF LUTZOMYIA TRAPIDOI AND LTZOMYIA REBURRA (DIPTERA: PHLEBOTOMINAE), IN RURAL TOURIST LOCATIONS , BIOSPHERE RESERVE AND LEISHMANIASIS ENDEMIC AREA, ECUADOR Autor : Navarro Castro, Juan Carlos; Duque, Paul L.; Arrivillaga-Henríquez, Jazzmín; Enríquez, Sandra; Ron-Garrido, Lenin; Benítez, Washington Resumen : This research represents the first attempt to assess the spatial and temporal distribution based on micro- meso scales on two species with different host preference habits (anthropophilic vs zoophilic), in the major Leishmaniasis endemic area in Ecuador, tourist locations, and Biosphere reserve. Phlebotomine species, Lutzomyia trapidoi (Fairchild) and Lutzomyia reburra (Fairchild and Hertig), were analyzed by trap/habitat/ month/locality/altitude, through the Poisson generalized regression model. Our data reveal a bimodal pattern for both species related with low precipitations and preference for forest habitat. Altitude, proximity to the forest, and the river were the variables that determine the hypervolume of the spatial distribution of relative abundance, where the overlap of these two species increases the risk of translocation and circulation of the etiological agent of leishmaniasis in sylvatic environments to rural–tourist–biosphere reserve areas and vice versa. The ecological characteristics of these two phlebotomines could explain the permanence of the major active and endemic focus of cutaneous leishmaniasis in the North-Western Ecuador a key aspect in tourism health-security in alternative tourism. Mon, 11 May 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3987 2020-05-11T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3986 Título : Conflicto empleo-familia y autopercepción de la salud desde una perspectiva de género Autor : Merino Salazar, Pamela Alexandra; Cadena-Baqueroa, María Emilia; Burgaleta Pérez, Elena; Andrade Andrade, Shirley; Lopez-Ruiz, María; Gómez García, Antonio Ramón Resumen : The objective of this study is to analyze gender inequalities in the relationship between employment-family conflict (EFC) and health status in the working population of Quito and Guayaquil. This is a cross-sectional study of non-agricultural employees, aged 18 or older and covered by social security, who were interviewed between 2016- 2017 in the First Survey of Safety Conditions and Health at Work of Quito and Guayaquil (n = 1729). Poisson regression models with robust variance separated by sex were used to calculate adjusted prevalence ratios for six health indicators. In both sexes, EFC was associated with poor self-perceived health, poor mental health, and head or back pain or discomfort, although the magnitude of the association was greater in women. Furthermore, EFC was associated with digestive problems only in women (aPR=1.65; 95% CI: 1.17-2.34). In neither sex was there an association between EFC and occupational accidents. The results of this study show that EFC is associated with poor health conditions in the working population, particularly among women. Public policies and workplace interventions aimed at achieving a balance between employment and family life from a gender perspective could help reduce impairments to health and gender inequalities in health. Descripción : El objetivo de este estudio es analizar las desigualdades de género en la relación del conflicto empleo familia (CEF) con el estado de salud de la población trabajadora de Quito y Guayaquil. Se trata de un estudio transversal de una muestra representativa de la población trabajadora no agrícola, con edad igual o mayor a 18 años y afiliada a la seguridad social, que fue entrevistada entre 2016-2017 en la I Encuesta sobre Condiciones de Seguridad y Salud en el Trabajo de Quito y Guayaquil (n=1729). Se emplearon modelos de regresión de Poisson con varianza robusta, separados por sexo, para calcular las razones de prevalencia ajustadas de seis indicadores de salud. En ambos sexos, el CEF se asoció con mala salud autopercibida, mala salud mental, dolor o molestias de cabeza y de espalda, aunque la magnitud de asociación fue mayor en las mujeres. Además, en las mujeres el CEF se asoció con problemas digestivos (RPa=1,65; IC 95%: 1,17-2,34). En ninguno de los dos sexos se observó asociación entre el CEF y los accidentes de trabajo. Los resultados del presente estudio muestran que el CEF se asocia con malas condiciones de salud en la población trabajadora, particularmente en las mujeres. Las políticas públicas e intervenciones en los centros de trabajo dirigidas a alcanzar un equilibrio entre el empleo y la vida familiar desde una perspectiva de género podrían resultar en una reducción en los daños a la salud y en las desigualdades de género en salud. Wed, 01 Jan 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3986 2020-01-01T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3985 Título : High-fat diet overfeeding promotes nondetrimental liver steatosis in female mice Autor : Arisqueta Herranz, Lino; Navarro-Imaz, Hiart; Labiano, Ibone; Rueda, Yuri; Fresnedo, Olatz Resumen : High-fat diet overfeeding promotes nondetrimental liver steatosis in female mice. Am J Physiol Gastrointest Liver Physiol 315: G772– G780, 2018. First published August 10, 2018; doi:10.1152/ajpgi. 00022.2018.—High-fat diet (HFD) feeding or leptin-deficient mice are extensively used as models resembling features of human nonal- coholic fatty liver disease (NAFLD). The concurrence of experimental factors as fat content and source or total caloric intake leads to prominent differences in the development of the hepatic steatosis and related disturbances. In this work, we characterized the hepatic lipid accumulation induced by HFD in wild-type (WT) and ob/ob mice with the purpose of differentiating adaptations to HFD from those specific of increased overfeeding due to leptin deficiency-associated hyperphagia. Given that most published works have been done in male models, we used female mice with the aim of increasing the body of evidence regarding NAFLD in female subjects. HFD pro- moted liver lipid accumulation only in the hyperphagic strain. Nev- ertheless, a decrease of lipid droplet-associated cholesteryl ester (CE) in both WT and obese animals was observed. These changes were accompanied by an improvement in the profile of lipoproteins that transport cholesterol and liver function markers in plasma from ob/ob mice and a lower hepatic index. Using primary hepatocytes from female mice, overaccumulation of CE induced by 0.4 mM oleic acid reversed in the presence of a specific Takeda G protein-coupled bile acid receptor agonist. Nevertheless, hepatocytes from male mice were not responsive. This study suggests that enterohepatic circulation of bile acids might be one of the factors that can affect sex dimorphism in NAFLD development, which underlines the importance of includ- ing female models in the NAFLD research field. Sun, 05 Aug 2018 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3985 2018-08-05T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3984 Título : Análisis estructural de un bus por el método de elementos finitos Autor : Llanes-Cedeño, Edilberto Antonio; Moreno-Zulca, Pedro Andrés; Guaña-Fernández, William Vinicio; Jima-Matailo, Juan Carlos Resumen : Urban-type buses are used to transport people over short and medium distances inside the city. It was relevant to visualize their design for safety reasons. The present study focused on the definition of the process of simulation of finite elements and as a result, the most relevant factors were identified when processing the characteristics of this. With the compilation of the theoretical scientific information that contributes as an aid to the analysis of the structure subjected to variable loads in order to capture the structural behavior showing that the simulation is sufficient for its construction and also it is necessary to resort to several methods that guarantee the safety of the passengers, as well as the applied model guarantee it for its construction. . Descripción : Los buses de tipo urbano sirven para el transporte de personas en distancias cortas y medianas en el interior de la ciudad es relevante visualizar su diseño por motivos de seguridad. El presente estudio se centró en la definición del proceso de simulación de elementos finitos y como resultado se identificaron los factores más relevantes a la hora de procesar las particularidades de esté. Con la recopilación de la información teórica científica que aporta como ayuda al análisis de la estructura sometido a cargas variables con el fin de plasmarse el comportamiento estructural mostrando que la simulación es suficiente para su construcción y además se debe acudir a varios métodos que avalen la seguridad de los pasajeros, como también el modelo aplicado garantizarlo para su construcción. Fri, 17 Jan 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3984 2020-01-17T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3933 Título : Development of an acoustically adaptive modular system for near real-time clarity-enhancement Autor : Liu Cheng, Alexander; Cruz, Patricio; Llorca Vega, Néstor Andrés; Mena, Andrés Resumen : This paper details the development of an acoustically adaptive modular system capable of enhancing Speech Clarity (C50 Clarity Index) in specific locations within a space in near real-time. The mechanical component of the system consists of quadrilateral, truncated pyramidal modules that extend or retract perpendicularly to their base. This enables said modules (1) to change in the steepness of the sides of their frustum, which changes the way incoming sound waves are deflected/reflected/diffused by the surfaces of the pyramid; and (2) to reveal or to hide the absorbent material under each module, which enables a portion of incoming sound waves to be absorbed/dissipated in a controlled manner. The present setup considers a fragmentary implementation of six modules. The behavior of these modules is determined by two steps in the computational component of the system. First, the initial position of the modules is set via a model previously generated by an evolutionary solver, which identifies the optimal extension/retraction extent of each of the six modules to select for individual configurations that collectively ascertain the highest clarity in said specific locations. Second, a simulated receiver at the location in question measures the actual clarity attained and updates the model’s database with respect to the configuration’s corresponding clarity-value. Since the nature of acoustics is not exact, if the attained measurement is lower than the model’s prediction for said location under the best module-configuration, but higher than the second-best configuration for the same location, the modules remain at the initial configuration. However, if the attained values are lower, this step reconfigures the modules to instantiate the second—or third-, fourth-, etc.—best configuration and updates the model’s database with respect to the new optimal module-configuration value. These steps repeat each time the user moves to another specific location. The objective of the system is to contribute to the intelligent and intuitive Speech Clarity regulation of an inhabited space. This contributes to its Interior Environmental Quality, which promotes well-being and quality of life. Fri, 15 Nov 2019 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3933 2019-11-15T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3932 Título : Multicriteria method for the evaluation of learning in the subject Mathematical Foundations of the Information Technology degree Autor : Llanes-Cedeño, Edilberto Antonio; Rodríguez-Rodríguez, Alberto; Pino-Tarragó, Julio C. Julio.C.; Quimis Sánchez, Omar A.; Vigoa-Escobedo, Yisell Resumen : The overall student performance can be modeled from the behavior of a set of indicators through a multicriteria approach. The objective of this research was to evaluate the learning of the Mathematical Fundamentals of the Information Technology degree course through the application of the multicriteria method, for decision making in the teaching-learning process. A multi-expert multicriteria approach is applied where evaluation indicators are identified consisting of four activities that make up the evaluation process. It is obtained that 80% of the students evaluated obtain a grade between good and excellent, concluding that the method applied is valid to measure the teaching and learning process. Descripción : El rendimiento global del estudiante puede ser modelado a partir del comportamiento de un conjunto de indicadores mediante un enfoque multicriterio. La presente investigación tuvo como objetivo evaluar el aprendizaje de la asignatura Fundamentos Matemáticos de la carrera Tecnologías de la Información mediante la aplicación del método multicriterio, para la toma de decisión en el proceso enseñanza-aprendizaje. Se aplica un enfoque multicriterio multiexperto donde se identifican indicadores evaluativos formado por cuatro actividades que conforman el proceso de evaluación. Se obtiene que el 80% de los estudiantes evaluados alcanzan una calificación entre bien y excelente, concluyéndose que el método aplicado es válido para medir el proceso de enseñanza y aprendizaje. Thu, 02 Apr 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3932 2020-04-02T00:00:00Z https://repositorio.uisek.edu.ec:443/handle/123456789/3931 Título : Characterization of the mocora leaf for mechanical purposes Autor : Martínez-Gómez, Javier; Nicolalde, Juan Francisco; Maiguashca, Javier Resumen : Some of Ecuador’s flora hasn’t been characterized, this paper searches the determine the mechanical, thermal and moisture absorption features of the leaf of the mocora palm, by means of tensile tests, scanning electron microscopy SEM, thermos-gravimetrical TGA analysis, water and resin absorption tests. The mocora presented 28Mpa strength as a single strap and as a braid an elongation 23.43%, thermally showed a resistance to degradation near de 300®C, relate with SEM observation the leaf of mocora have a cover and for this reason the water take some time to be absorbed. Descripción : Parte de la flora ecuatoriana no se ha caracterizado, esta investigación busca determinar las propiedades mecánicas, térmicas y absorción de humedad de la hoja de la palma mocora, mediante pruebas de tracción, microscopía electrónica de barrido MEB, análisis termogravimétrico ATG, pruebas de absorción de líquidos. La mocora presentó una resistencia de 28Mpa como una tira y trenzada una elongación del 23.43%, resistencia a la degradación térmica cerca de 300 ° C, en base a la observación por MEB la hoja de mocora presenta una cobertura, y es por esta razón que el agua tarda en ser absorbida. Thu, 12 Mar 2020 00:00:00 GMT https://repositorio.uisek.edu.ec:443/handle/123456789/3931 2020-03-12T00:00:00Z