500 research outputs found
Arquitectura híbrida para el estándar de compresión de vídeo H.265/HEVC
No full textTesis de la Universidad Complutense de Madrid, Facultad de Informática, leída el 14/11/2019En las últimas décadas las aplicaciones multimedia han evolucionado enormemente. Los estándares de compresión de vídeo han contribuido notablemente a este avance convirtiéndose en esenciales para la transmisión de datos multimedia. Desde 1980, los estándares de compresión de vídeo han enfocado sus principales esfuerzos a reducir la tasa de datos generada y proporcionar un alto nivel de calidad visual. Debido a la creciente demanda de contenido digital, hoy en día resulta de vital importancia optimizar el ancho de banda utilizado para la transmisión de vídeo digital, buscando obtener grandes tasas de compresión de datos sin pérdidas apreciables en la calidad del servicio. Veinte años atrás se consideraba a la compresión de vídeo como algo novedoso, actualmente es algo ubicuo. La mayoría de dispositivos que constituyen la electrónica de consumo hacen uso de una manera u otra de la compresión de vídeo. Aunque la mayoría de usuarios asume que estas mejoras son el resultado de los avances generales que se han producido en la electrónica de consumo, lo cierto es que son principalmente debidas a la compresión de vídeo...In the last few decades, multimedia applications have made a considerable amount of progress. Video coding standards have noticeably contributed to this advance by becoming essential during data transmission. Since 1980, video standards have focused on reducing the size of the resulting bitstream. Besides this objective, the maintenance of a high level of visual quality has been the second factor to consider when trying to optimize video transmission. Due to the increasing demand for digital content, nowadays it is vital to optimize the available bandwidth for transmission and reception of video data, targeting high compression data rates without a significant quality loss. Around 20 years ago video compression was something of a novelty, today it is ubiquitous. From TVs to cell phones and camcorders to PCs, most consumer electronic devices rely on video compression. While most users assume that these improvements are a result of general-purpose advances in consumer technology, they are actually all driven by video compression...Fac. de InformáticaTRUEunpu
OSWALD: OpenCL Smith-Waterman on Altera’s FPGA for Large Protein Databases
No full textThe well-known Smith–Waterman algorithm is a high-sensitivity method for local sequence alignment. Unfortunately, the Smith–Waterman algorithm has quadratic time complexity, which makes it computationally demanding for large protein databases. In this paper, we present OSWALD, a portable, fully functional and general implementation to accelerate Smith–Waterman database searches in heterogeneous platforms based on Altera’s FPGA. OSWALD exploits OpenMP multithreading and SIMD computing through SSE and AVX2 extensions on the host while taking advantage of pipeline and vectorial parallelism by way of OpenCL on the FPGAs. Performance evaluations on two different heterogeneous architectures with real amino acid datasets show that OSWALD is competitive in comparison with other top-performing Smith–Waterman implementations, attaining up to 442 GCUPS peak with the best GCUPS/watts ratio.Fil: Rucci, Enzo. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Garcia, Carlos. Universidad Complutense de Madrid; EspañaFil: Botella, Guillermo. Universidad Complutense de Madrid; EspañaFil: de Giusti, Armando Eduardo. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Naiouf, Ricardo Marcelo. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; ArgentinaFil: Prieto Matias, Manuel. Universidad Complutense de Madrid; Españ
An energy-aware performance analysis of SWIMM: Smith-Waterman implementation on Intel's Multicore and Manycore architectures
No full textSummary Alignment is essential in many areas such as biological, chemical and criminal forensics. The well-known Smith-Waterman (SW) algorithm is able to retrieve the optimal local alignment with quadratic time and space complexity. There are several implementations that take advantage of computing parallelization, such as manycores, FPGAS or GPUS, in order to reduce the alignment effort. In this research, we adapt, develop and tune the SW algorithm named SWIMM on a heterogeneous platform based on Intel's Xeon and Xeon Phi coprocessor. SWIMM is a free tool available in a public git repository https://github.com/enzorucci/SWIMM. We efficiently exploit data and thread-level parallelism, reaching up to 380 GCUPS on heterogeneous architecture, 350 GCUPS for the isolated Xeon and 50 GCUPS on Xeon Phi. Despite the heterogeneous implementation obtaining the best performance, it is also the most energy-demanding. In fact, we also present a trade-off analysis between performance and power consumption. The greenest configuration is based on an isolated multicore system that exploits AVX2 instruction set architecture reaching 1.5 GCUPS/Watts.Fil: Rucci, Enzo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; ArgentinaFil: García, Carlos. Universidad Complutense de Madrid; EspañaFil: Botella, Guillermo. Universidad Complutense de Madrid; EspañaFil: de Giusti, Armando Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; ArgentinaFil: Naiouf, Ricardo Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; ArgentinaFil: Prieto Matías, Manuel. Universidad Complutense de Madrid; Españ
SWIFOLD: Smith-Waterman Implementation on FPGA with OpenCL for long DNA sequences
No full textBackground: The Smith-Waterman (SW) algorithm is the best choice for searching similar regions between two DNA or protein sequences. However, it may become impracticable in some contexts due to its high computational demands. Consequently, the computer science community has focused on the use of modern parallel architectures such as graphics processing units (GPUs), Xeon Phi accelerators and field programmable gate arrays (FPGAs) to speed up large-scale workloads. Results: This paper presents and evaluates SWIFOLD: a Smith-Waterman parallel Implementation on FPGA with OpenCL for Long DNA sequences. First, we evaluate its performance and resource usage for different kernel configurations. Next, we carry out a performance comparison between our tool and other state-of-the-art implementations considering three different datasets. SWIFOLD offers the best average performance for small and medium test sets, achieving a performance that is independent of input size and sequence similarity. In addition, SWIFOLD provides competitive performance rates in comparison with GPU-based implementations on the latest GPU generation for the large dataset. Conclusions: The results suggest that SWIFOLD can be a serious contender for accelerating the SW alignment of DNA sequences of unrestricted size in an affordable way reaching on average 125 GCUPS and almost a peak of 270 GCUPS.Fil: Rucci, Enzo. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaFil: García Sanchez, Carlos. Universidad Complutense de Madrid; EspañaFil: Botella, Guillermo Juan. Universidad Complutense de Madrid; EspañaFil: de Giusti, Armando Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; ArgentinaFil: Naiouf, Ricardo Marcelo. Universidad Nacional de la Plata. Facultad de Informatica. Instituto de Investigación En Informatica Lidi; ArgentinaFil: Prieto Matías, Manuel. Universidad Complutense de Madrid; Españ
How might we help someone to gain perspective on school dropouts: Research compiled using design thinking and liberatory design
No full textSpain school dropout rate is bad, but... really how bad? why is it happening? and how we're
going to help our audience become more culturally responsive teachers. (Author abstract)Botella, B.L., Bowie, E., Cummings, K., Sacanell, G., and Petrillo, M. (2021). How might we help someone to gain perspective on school dropouts: Research compiled using design thinking and liberatory design. Retrieved from http://academicarchive.snhu.ed
Aplicaciones de enseñanza para el aprendizaje del idioma a través de los deportes: tecnología y deportes en inglés y español como aula L2/FL
No full textAutor/s
Carla Mª Botella TejeraMª Mar Galindo MerinoUniversity of Alicante, Spain
ABSTRACT
This paper presents a selection of teaching apps for the teaching and learning of both English and Spanish through sports. In the frame of a funded research project on Applied Linguistics to the teaching of modern languages through sports (Galindo Merino, 2016a), one of our aims is to apply ICT to this teaching approach (Botella Tejera et al., 2016; Sellés et al., 2016). Thus, 17 apps related to the teaching of languages through sports are explored. Specifically, we have selected different kinds of apps: language-based apps, language learning apps, three specific English through sports apps, and sport journals and TV channels apps. After presenting and analyzing them, we provide a wide range of activities to include them in the language classroom, in line with recent developments in task-based language teaching with technology..Author/s
Carla Mª Botella TejeraMª Mar Galindo MerinoUniversity of Alicante, Spain
ABSTRACT
This paper presents a selection of teaching apps for the teaching and learning of both English and Spanish through sports. In the frame of a funded research project on Applied Linguistics to the teaching of modern languages through sports (Galindo Merino, 2016a), one of our aims is to apply ICT to this teaching approach (Botella Tejera et al., 2016; Sellés et al., 2016). Thus, 17 apps related to the teaching of languages through sports are explored. Specifically, we have selected different kinds of apps: language-based apps, language learning apps, three specific English through sports apps, and sport journals and TV channels apps. After presenting and analyzing them, we provide a wide range of activities to include them in the language classroom, in line with recent developments in task-based language teaching with technology..Autor/es
Carla Mª Botella TejeraMª Mar Galindo MerinoUniversity of Alicante, Spain
ABSTRACT
This paper presents a selection of teaching apps for the teaching and learning of both English and Spanish through sports. In the frame of a funded research project on Applied Linguistics to the teaching of modern languages through sports (Galindo Merino, 2016a), one of our aims is to apply ICT to this teaching approach (Botella Tejera et al., 2016; Sellés et al., 2016). Thus, 17 apps related to the teaching of languages through sports are explored. Specifically, we have selected different kinds of apps: language-based apps, language learning apps, three specific English through sports apps, and sport journals and TV channels apps. After presenting and analyzing them, we provide a wide range of activities to include them in the language classroom, in line with recent developments in task-based language teaching with technology.
Efecto de las condiciones de freído sobre la pérdida de humedad y ganancia de aceite en trozos de ñame (Dioscorea alata)
No full textThe effect of frying conditions on immersion on moisture loss and oil content were studied at different times in two yam varieties:
Diamante 22 and Pico Botella. The experimental data adjusted itself to the first order exponential model for humidity transfer (r >
0.9) for both cultivars. The humidity diffusion coefficient for the two varieties of yam fried at 140°, 160° and 180°C for 1 to 9 minutes
were 8.11±0.76, 8.2±0.81, and 8.62 ±0.71*10-9 m2/s for the Diamante 22 variety, respectively, and 8.32±0.82,
8.38±0.78, 8.54±0.84*10-9 m2/s for the Pico de Botella variety. Activation energy was 24.43 kJ/mol for the Diamante 22
variety and 21.27 kJ/mol for the Pico de Botella variety. The results showed that there was higher oil absorption after 180 s and
at 140°C while taking into account 0.377 kg water / kg solid moisture loss for Diamond 22 and 0.410 kg water / kg solid Pico
de Botella at 180°C for 540 s.Las condiciones del efecto de freído sobre la humedad y el contenido de aceite a distintos tiempos fueron estudiadas en dos variedades
de ñame: Diamante 22 y Pico de Botella. Los datos experimentales se ajustan a un modelo exponencial de primer orden
para la transferencia de humedad (r > 0,9) en ambos cultivares. El coeficiente de difusión de la humedad de las dos variedades
de ñame, freídos a temperaturas de 140, 160 y 180 °C en tiempos de 1 a 9 minutos fueron de 8,11 ± 0,76, 8,21 ±
0,81 y 8,62 ± 0,71*10-9 m2/s, para la variedad Diamante 22, y 8,32 ± 0,82, 8,38 ± 0,78, 8,54 ± 0,84*10-9 m2/s para la
variedad Pico de Botella, y la energía de activación fue de 24,43 kJ/mol para la variedad Diamante 22 y 21,27 kJ/mol para la
variedad Pico de Botella. En los resultados obtenidos se observa que a 180 s y temperatura de 140 °C hay mayor absorción de
aceite, teniendo en cuenta simultáneamente la pérdida de humedad en el orden de 0,377 kg de agua/kg de sólidos para Diamante
22 y 0,410 kg de agua/kg de sólido para pico de botella a 180 °C durante 540
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