Using the Xeon Phi platform to run speculatively-parallelized codes

Producción CientíficaIntel Xeon Phi accelerators are one of the newest devices used in the field of parallel computing. However, there are comparatively few studies concerning their performance when using most of the existing parallelization techniques. One of them is thread-level speculation, a technique that optimistically tries to extract parallelism of loops without the need of a compile-time analysis that guarantees that the loop can be executed in parallel. In this article we evaluate the performance delivered by an Intel Xeon Phi coprocessor when using a software, state-of-the-art thread-level speculative parallelization library in the execution of well-known benchmarks. We describe both the internal characteristics of the Xeon Phi platform and the particularities of the thread-level speculation library being used as benchmark. Our results show that, although the Xeon Phi delivers a relatively good speedup in comparison with a shared-memory architecture in terms of scalability, the relatively low computing power of its computational units when specific vectorization and SIMD instructions are not fully exploited makes this first generation of Xeon Phi architectures not competitive (in terms of absolute performance) with respect to conventional multicore systems for the execution of speculatively parallelized code.2018-04-01Castilla-Leon Regional Government (VA172A12-2); MICINN (Spain) and the European Union FEDER (MOGECOPP project TIN2011-25639, HomProg-HetSys project TIN2014-58876-P, CAPAP-H5 network TIN2014-53522-REDT)

Impulsiveness and aggression in students of second cycle of E.S.O Palencia Maristas school in relation to gender and sport of parents and students

El objetivo es estudiar la impulsividad y la agresividad de alumnos de 2º ciclo ESO. De igual forma conocer dicha agresividad e impulsividad en relación al género y práctica deportiva de padres y alumnos. Para ello se lleva a cabo un diseño descriptivo, de tipo transversal bajo un enfoque cuantitativo. El instrumento utilizado fue la revisión del cuestionario de Buss y Perry (1992) revisado por López, Sánchez, Rodríguez y Fernández (2009). Se estructura en 29 ítems valorado en escala likert 1-5 y se añadieron 4 ítems, uno dicotómico y tres restantes para saber actividad física de alumnos y padres.The aim to study overall impulsivity and aggressiveness of students in 2nd ESO cycle. Similarly know that aggression and impulsivity in relation to gender and sport of parents and students. This is carried out a design descriptive, cross under a quantitative approach. The instrument used was the review of the questionnaire by Buss and Perry (1992) reviewed by Lopez, Sanchez, Rodriguez and Fernandez (2009). The questionnaire is divided into 29 items valued at 1-5 Likert scale and also added 4 items one dichotomous and the remaining three to know physical activity of students and parent

Analysis and measures to attack the sedentarismo in the E.S.O. by means of the physical activity. Study in 3 º E.S.O. students in the Santa Rita School of Palencia

El objetivo es estudiar y analizar desde un marco teórico los problemas y antecedentes relacionados con el sedentarismo, en la etapa de secundaria (12-16 años), y mediante el instrumento de un cuestionario de actividad física y salud de Álvarez del Palacio, E. y Robles Tascón, J.A. (2003), obtener datos concretos en alumnos de 3º E.S.O. del Colegio Santa Rita de Palencia. El cuestionario se divide en 10 bloques, obteniendo unos resultados de cada uno de ellos. La muestra final fué de 52 alumnos.The objective is to study and analyze from a theoretical framework the problems and antecedents related to the physical inactivity, in the secondary stage (12-16 years), and through of the instrument of a questionnaire of physical activity and health by Álvarez del Palacio, E. And Robles Tascón, JA (2003), to obtain concrete data in students of 3rd E.S.O. Of the Colegio Santa Rita de Palencia. The questionnaire is divided into 10 items, obtaining results from each of them. The final sample was 52 students