469 research outputs found

    Evolución diagenética de la plataforma carbonatada Aptiense Superior del sector Benicàssim-Oropesa, Cuenca del Maestrat, Cadena Ibérica

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    The upper Aptian carbonate platform of Benicàssim-Orpesa area contains reefal facies that are affected by a complex diagenetic evolution including: (1) Calcite 1, (2) Calcite 2, (3) Calcite 3, (4) Silica and dolomite, and (5) Dedolomite and Calcite 4. Cc1 with low Fe content indicates an early marine environment in which the replacement of the coral walls occurred together with precipitation of this cement in the primar y porosity. Cc2 with high Fe content and cross- cutting mosaic geometries are interpreted as indicative of a sea level drop resulting in the alteration of the corals in a meteoric-phreatic environment and the formation of dissolution cavities. Cc3 with low Fe and high Sr content indicates a new episode of marine influence probably related with a sea level rise and resulting in the precipitation of this cement in the secondary porosity. Silica precipitated contemporaneously to dolomite rhombohedra crystals. The later Cc4, with high Fe and low Sr content, also precipitated in a meteoric-phreatic environment, probably coetaneous to dedolomitization. Finally, saddle dolomite occurs with no obser ved relation with the other diagenetic products, and probably precipitated in a late and deep eventPeer ReviewedPostprint (published version

    Revistas europeas de Estudios Latinoamericanos. Informe preparado para el 8º Congreso CEISAL, Salamanca 2016

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    Partiendo de América Latina Portal Europeo, recurso producido por los centros miembros de REDIAL, este informe analiza una selección de revistas europeas de Estudios Latinoamericanos. El corpus examinado consta de los volúmenes publicados entre 2011 y 2015 en 74 revistas. Se excluyeron otras 215 publicaciones registradas en el portal por diferentes razones, 34% lo fueron por no haber editado números posteriores a 2013. Esto indica que la continuidad es un problema para bastantes revistas. Varias de ellas también han tenido un recorrido corto y nuestro análisis muestra que en su mayoría las revistas de Estudios Latinoamericanos son relativamente jóvenes.N

    Institutional and regulatory changes in the financial markets after the crisis emergence (2007-09)

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    In this paper we analyze the most likely and the most desirable developments in financial markets and in a broader sense, the most desirable regulation of the financial sector. The purpose of the essay is in fact to analyze the most important issues of financial regulation and to highlight that finding the most desirable solutions are particularly difficult. These difficulties come from purely technical reasons, the multi-dimensionality of the analyzed problems, but also some aspects of the methodology and philosophy under the current methodological approach for financial regulationEn este trabajo se analiza las novedades más probables y más deseables en los mercados financieros y en un sentido más amplio, la regulación más deseable del sector financiero. El objetivo del ensayo es de hecho la señalización de los temas más importantes de la regulación financiera y poner de relieve que la búsqueda de las soluciones más deseables es particularmente difícil. Estas dificultades provienen de razones puramente técnicas, la multidimensionalidad de los problemas analizados, pero también algunos aspectos de la metodología y la filosofía bajo el enfoque metodológico actual de la regulación financier

    Dynamic tuning of parallel programs

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    Performance of parallel programs is one of the reasons of their development. The process of designing and programming a parallel application is a very hard task that requires the necessary knowledge for the detection of performance bottlenecks, and the corresponding changes in the source code of the application to eliminate those bottlenecks. Current approaches to this analysis require a certain level of expertise from the developers part in locating and understanding the performance details of the application execution. For these reasons, we present an automatic performance analysis tool with the objective of alleviating the developers of this hard task: Kappa Pi. The most important limitation of KappaPi approach is the important amount of gathered information needed for the analysis. For this reason, we present a dynamic tuning system that takes measures of the execution on-line. This new design is focused to improve the performance of parallel programs during runtime.I Workshop de Procesamiento Distribuido y Paralelo (WPDP)Red de Universidades con Carreras en Informática (RedUNCI

    Process tracking for dynamic tuning applications on the grid

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    Los recursos computacionales requeridos por la comunidad científica para solucionar problemas son mayores que los ofrecidos por la infraestructura actual. La necesidad de mayores prestaciones se debe al constante progreso de la investigación, nuevos problemas o aumento del detalle en los problemas corrientes. Usuarios crean nuevos sistemas distribuidos en larga escala como sistemas Grid para lograr prestaciones deseadas. Sistemas Grid son generalmente construidos sobre los recursos computacionales disponibles como clusters, maquinas paralelas o dispositivos de almacenamiento distribuidos en diferentes organizaciones e interconectado por una red. Sintonizar aplicaciones en un sistema Grid no es fácil debido a las características de distribución de procesos en múltiples clusters controlados por diferentes sistemas de colas y heterogeneidad de la red de comunicaciones. Nosotros tenemos un entorno de monitorización, análisis y sintonización (MATE) que permite la sintonización dinámica de aplicaciones en entornos cluster. Debido a las muchas capas de software presente en sistemas Grid, dos ejecuciones de una misma aplicación pueden usar recursos distintos. Para sintonizar los procesos de la aplicación, nuestra herramienta debe localizar y seguir la ejecución de los procesos en el sistema. Nosotros llamamos eso como problema de localización de procesos. Este artículo presenta la integración de MATE con Gris y dos aproximaciones implementadas para solucionar el problema de localización de procesos dentro de sistemas Grid.The computational resources need by the scientific community to solve problems is beyond the current available infrastructure. Performance requirements are needed due constant research progress, new problems studies or detail increase of the current ones. Users create new wide distributed systems such as computational Grids to achieve desired performance goals. Grid systems are generally built on top of available computational resources as cluster, parallel machines or storage devices distributed within different organizations and those resources are interconnected by a network. Tune applications on Grid environment is a hard task due system characteristics like multi-cluster job distribution among different local schedulers and dynamic network bandwidth behavior. We had a Monitoring, Analysis and Tuning Environment (MATE) that allows dynamic performance tuning applications within a cluster. Due to the many software layers present on the grid, similar job submission may execute on different places. To tune application jobs, our tool needs to locate and follow the jobs execution within the system. We call this a process tracking problem. This paper presents MATE integration to the Grid and the two process tracking approaches implemented in order to solve the process tracking problem within Grid systemsVII Workshop de Procesamiento Distribuido y Paralelo (WPDP)Red de Universidades con Carreras en Informática (RedUNCI

    Institutional and regulatory changes in the financial markets after the crisis emergence (2007-09)

    Get PDF
    In this paper we analyze the most likely and the most desirable developments in financial markets and in a broader sense, the most desirable regulation of the financial sector. The purpose of the essay is in fact to analyze the most important issues of financial regulation and to highlight that finding the most desirable solutions are particularly difficult. These difficulties come from purely technical reasons, the multi-dimensionality of the analyzed problems, but also some aspects of the methodology and philosophy under the current methodological approach for financial regulationEn este trabajo se analiza las novedades más probables y más deseables en los mercados financieros y en un sentido más amplio, la regulación más deseable del sector financiero. El objetivo del ensayo es de hecho la señalización de los temas más importantes de la regulación financiera y poner de relieve que la búsqueda de las soluciones más deseables es particularmente difícil. Estas dificultades provienen de razones puramente técnicas, la multidimensionalidad de los problemas analizados, pero también algunos aspectos de la metodología y la filosofía bajo el enfoque metodológico actual de la regulación financier

    Process tracking for dynamic tuning applications on the grid

    Get PDF
    Los recursos computacionales requeridos por la comunidad científica para solucionar problemas son mayores que los ofrecidos por la infraestructura actual. La necesidad de mayores prestaciones se debe al constante progreso de la investigación, nuevos problemas o aumento del detalle en los problemas corrientes. Usuarios crean nuevos sistemas distribuidos en larga escala como sistemas Grid para lograr prestaciones deseadas. Sistemas Grid son generalmente construidos sobre los recursos computacionales disponibles como clusters, maquinas paralelas o dispositivos de almacenamiento distribuidos en diferentes organizaciones e interconectado por una red. Sintonizar aplicaciones en un sistema Grid no es fácil debido a las características de distribución de procesos en múltiples clusters controlados por diferentes sistemas de colas y heterogeneidad de la red de comunicaciones. Nosotros tenemos un entorno de monitorización, análisis y sintonización (MATE) que permite la sintonización dinámica de aplicaciones en entornos cluster. Debido a las muchas capas de software presente en sistemas Grid, dos ejecuciones de una misma aplicación pueden usar recursos distintos. Para sintonizar los procesos de la aplicación, nuestra herramienta debe localizar y seguir la ejecución de los procesos en el sistema. Nosotros llamamos eso como problema de localización de procesos. Este artículo presenta la integración de MATE con Gris y dos aproximaciones implementadas para solucionar el problema de localización de procesos dentro de sistemas Grid.The computational resources need by the scientific community to solve problems is beyond the current available infrastructure. Performance requirements are needed due constant research progress, new problems studies or detail increase of the current ones. Users create new wide distributed systems such as computational Grids to achieve desired performance goals. Grid systems are generally built on top of available computational resources as cluster, parallel machines or storage devices distributed within different organizations and those resources are interconnected by a network. Tune applications on Grid environment is a hard task due system characteristics like multi-cluster job distribution among different local schedulers and dynamic network bandwidth behavior. We had a Monitoring, Analysis and Tuning Environment (MATE) that allows dynamic performance tuning applications within a cluster. Due to the many software layers present on the grid, similar job submission may execute on different places. To tune application jobs, our tool needs to locate and follow the jobs execution within the system. We call this a process tracking problem. This paper presents MATE integration to the Grid and the two process tracking approaches implemented in order to solve the process tracking problem within Grid systemsVII Workshop de Procesamiento Distribuido y Paralelo (WPDP)Red de Universidades con Carreras en Informática (RedUNCI

    Time course differential gene expression in response to porcine circovirus type 2 subclinical infection

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    This study was aimed at characterizing the potential differences in gene expression in piglets inoculated with Porcine circovirus type 2 (PCV2), the essential causative agent of postweaning multisystemic wasting syndrome. Seven-day-old caesarean-derived, colostrum-deprived piglets were distributed into two groups: control (n = 8) and pigs inoculated with 105.2 TCID50 of the Burgos PCV2 isolate (n = 16). One control and three inoculated pigs were necropsied on days 1, 2, 5, and 8 post-infection (p.i.). The remaining pigs (four of each group) were sequentially bled on days 0, 7, 14, 21, and 29 p.i. (necropsy). Total RNA from the mediastinal lymph node (MLN) and lysed whole blood (LWB) samples were hybridized to Affymetrix Porcine GeneChip®. Forty-three probes were differentially expressed (DE) in MLN samples (FDR < 0.1, fold change > 2) and were distributed into three clusters: globally down-regulated genes, and up-regulated genes at early (first week p.i.) and late (day 29 p.i.) stages of infection. In LWB samples, maximal differences were observed at day 7 p.i., with 54 probes DE between control and inoculated pigs. Main Gene Ontology biological processes assigned to up-regulated genes were related to the immune response. Six common genes were found in both types of samples, all of which belonged to the interferon signaling antiviral effector pathway. Down-regulated genes were mainly related to cell adhesion and migration in MLN, and cellular organization and biogenesis in LWB. Microarray results were validated by quantitative real-time PCR. This study provides, for the first time, the characterization of the early and late molecular events taking place in response to a subclinical PCV2 infection
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