Browsing by Author "Solano-Quinde, Lizandro D."

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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.
Infraestructura basada en Globus Toolkit para dar soporte a repositorios distribuidos de imágenes médicas
(Universidad de Cuenca, 2015) Guillermo, Juan-Carlos; Gualán, Ronald; Solano-Quinde, Lizandro D.; Collaguazo-Montalván, Diana; Ramírez-Montalván, Whasintong; La Cruz, Alexandra; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
Grid computing is a recent and innovative technology; recently it has been used for designing teleradiology systems. Grid computing enables the integration and collaborative use of high performance computers, networks and databases, suitable for developing a teleradiology system. In this work we present a solution based on grid computing for a teleradiology system. This infrastructure allows accessing and exchanging of medical images stored physically located in different repositories like; hospitals and diagnostic imaging centers. Globus Toolkit (v6.0) is used as an intermediate communication program in this grid infrastructure. Images are stored in local repositories managed and handled by servers PACS (Picture Archiving and Communication System), usually used in workstations of the medical imaging centers. The main contribution in this paper is the design of a grid infrastructure for searching purposes either semantic or visual content, with greater emphasis on the integration of data security, user authentication while maintaining patient confidentiality.
OpenMP implementation of the horizontal diffusion method of the weather research and forecasting (WRF) model
(Universidad de Cuenca, 2015) Gualán-Saavedra, Ronald M.; Solano-Quinde, Lizandro D.; Bode, Brett M.; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
This article analyzes and implements the Horizontal Diffusion method of the Weather Research and Forecast (WRF) model, using the OpenMP API to exploit the multi-core power of an Intel Xeon computer. The main scope of the study is to assess well established concepts related to scalability and cache efficiency by mean of three experiments where the use of appropriate profilers shows to be of great utility to understand computing behavior and consequently to choose some optimization approaches.