6 research outputs found

    Procedimientos de obtención de lípidos portadores como sistemas de liberación de ingredientes alimentarios bioactivos

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    Tesis doctoral inédita. Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Química Física Aplicada. Fecha de lectura: 10-04-201

    Wavelet transform for large scale image processing on modern microprocessors

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    In this paper we discuss several issues relevant to the vectorization of a 2-D Discrete Wavelet Transform on current microprocessors. Our research is based on previous studies about the efficient exploitation of the memory hierarchy, due to its tremendous impact on performance. We have extended this work with a more detailed analysis based on hardware performance counters and a study of vectorization, in particular, we have used the Intel Pentium SSE instruction set. Most of our optimizations are performed at source code level to allow automatic vectorization, though some compiler intrinsic functions have been introduced to enhance performance. Taking into account the abstraction at which the optimizations are performed, the results obtained on an Intel Pentium III microprocessor are quite satisfactory, even though further improvement can be obtained by a more extensive use of compiler intrinsics

    2-D wavelet transform enhancement on general-purpose microprocessors: memory hierarchy and SIMD parallelism exploitation

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    This paper addresses the implementation of a 2-D Discrete Wavelet Transform on general-purpose microprocessors, focusing on both memory hierarchy and SIMD parallelization issues. Both topics are somewhat related, since SIMD extensions are only useful if the memory hierarchy is efficiently exploited. In this work, locality has been significantly improved by means of a novel approach called pipelined computation, which complements previous techniques based on loop tiling and non-linear layouts. As experimental platforms we have employed a Pentium-III (P-III) and a Pentium-4 (P-4) microprocessor. However, our SIMD-oriented tuning has been exclusively performed at source code level. Basically, we have reordered some loops and introduced some modifications that allow automatic vectorization. Taking into account the abstraction level at which the optimizations are carried out, the speedups obtained on the investigated platforms are quite satisfactory, even though further improvement can be obtained by dropping the level of abstraction (compiler intrinsics or assembly code)

    Funcionamiento de la herramienta OpenIRS-UCM y sus sinergias con Moodle

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    Los sistemas de respuesta interactiva han ido ganando aceptación dentro de la comunidad educativa en los últimos años y una prueba clara de ello es el número creciente de los sistemas comerciales disponibles hoy en el mercado. Sin embargo, la mayoría de las soluciones se basan en sistemas que están cerrados, son rígidos y dependientes del software instalado en el computador del profesor. Presentamos en este trabajo una nueva herramienta gratuita que hemos denominado OpenIRS-UCM que incorpora la mayoría de las funcionalidades de las aplicaciones comerciales con la ventaja de integrar varios tipos de mandos comerciales con otros dispositivos como smartphones, PDAs, portátiles, etc. Además, permite interactuar con la plataforma del campus virtual de Moodle incrementando exponencialmente sus posibilidades de uso

    Herramientas para el diseño y gestión de Guías Docentes digitales

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    El objetivo de este proyecto es elaborar una herramienta web que permita a los profesores actualizar las fichas docentes de su asignatura de forma online mediante un formulario web, almacenando la información de las guías en una base de datos, de modo que el sistema señale los cambios realizados, gestione el acceso y permisos de los usuarios, y permita exportar y generar las fichas de las asignaturas en diversos formatos respetando los apartados y condiciones de la Memoria de Verificación (VERIFICA)
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