Browsing by Author "Astudillo-Salinas, Darwin"

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Diseño de una aplicación móvil para monitorear la cobertura GSM en Cuenca
(Universidad de Cuenca, 2015) Gallardo A., Rafael; Jaramillo V., Juan C.; Astudillo-Salinas, Darwin; Palacio-Baus, Kenneth; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
This paper presents e-Cobertura, a mobile application developed for the Android Operating System for measuring GSM signal power, and presents a Web-hosted representative coverage map generated based on the taken measurements called coberturaWeb. e-Cobertura allows presenting parameters of the network and the mobile device used for measurement, as well as statistical representation of these data. coberturaWeb not only shows the measurements acquired by the application, but also allows the user to interact with it in order to obtain detailed information about specific areas of the city.
Diseño de una red de fibra hasta el hogar para la ciudad de Cuenca
(Universidad de Cuenca, 2016-11-16) Heredia Sandoval, Víctor; Astudillo-Salinas, Darwin
This article presents a Fiber To The Home (FTTH), for the city of Cuenca in the province of Azuay, Ecuador. The design goal is to bring to homes an unlimited volume of information, which will be accompanied by the need that telecommunication services every time require larger bandwidth. Foregoing means that a technology is needed that reaches most households with the lowest cost of implementation, and respecting the technical/esthetical standards for laying cables in the city.
Inicio network design for data transmission of weather sensors
(Universidad de Cuenca, 2015) Reyes-Coellar, Juan; Tene, Mauricio; Astudillo-Salinas, Darwin; Barros, Gabriel; Solano-Quinde, Lizandro; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
To acquire information from the environment in a large area of the south PROMAS1 has deployed weather sensors in a large area to acquire information from the environment, which must be collected from the remote locations and transferred to data center? Currently, the data collection is done manually, which means that PROMAS staff needs to go to the actual sensor location and download the data, which involves time invested and recurring costs for them. Therefore, in this work, a network design to automate the data collection and transfer is proposed. The goal is to get data with the lowest possible latency, so data is available as soon as information is generated. The proposed network transfers data using the standard IEEE 802.11 or IEEE 802.15.4, which involve the analysis of three fundamental parameters as distance, energy and deployment cost.
Sistema de anotación semiautomático de señales electrocardiográficas de esfuerzo
(Universidad de Cuenca, 2016-11-16) Fajardo-Reinoso, Juan; Astudillo-Salinas, Darwin; Solano-Quinde, Lizandro; Wong, Sara
Despite the availability of electrocardiographic (ECG) databases does the medical sector not yet possesses an annotated stress database. This paper introduces an annotation system using RR-time series obtained from an eight lead stress database (DICARDIA). First, the system proposes to the user a lead (reference channel) according to its statistical measures. The user then undergoes a visual inspection validating or denying the channel proposed by the system. Afterwards, the system proposes two options based on the quality of the RR-time series. If the series contains few artifacts the annotations are realized using the interval of annotations; in the case of noisy series the system allows annotations beat by beat. The preliminary results realized over 172025 beats (approximately 15% of DICARDIA database) give a sensibility and positive predictive value of 97.66% and 96.71% respectively. The system will permit the delineation of stress databases, which will be an important starting point for evaluating the performance of QRS detectors.