191 research outputs found

    The Gothic villain and his role as hero or anti-hero in Gothic fiction

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    Después de situar la novela Gótica en su periodo histórico y artístico correspondiente, este ensayo pretende estudiar los conceptos del bien y el mal con el objetivo de tener un mayor entendimiento de la psique de los protagonistas de cuatro de las novelas góticas más populares a nivel universal. Dichos personajes son: Heathcliff (Wuthering Heights), Edward Rochester (Jane Eyre), Victor Frankenstein y su Monstruo (Frankenstein), y Dr Henry Jekyll/Mr Edward Hyde (The Strange Case of Dr Jekyll and Mr Hyde). A través del psicoanálisis de los personajes desde el punto de vista Freudiano, el estudio de arquetipos, y la teoría evolucionista o Darwiniana en la literatura – y más concretamente en el género Gótico – procederé a determinar si estos personajes son realmente villanos en sus propias historias. Como resultado, se podría decir que estos personajes, en casos concretos, se pueden considerar en ciertos modo víctimas de las tensiones de la represiva sociedad Victoriana, cuyos férreos valores están obligados a adoptar y ejercer, convirtiéndolos en rebeldes, e incluso monstruos

    Social based adaptation in multi-agent systems

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    This work presents a new agent model based in three main topics: emotional psychology (OCC list of emotions), sociology and cognitive psychology (KAI index) and the concept of "opinion" given by the agents. The new model is suitable for implementing adaptation in changing environments, as well as for static ones which are highly unpredictable.García-Pardo Giménez De Los Galanes, JÁ. (2010). Social based adaptation in multi-agent systems. http://hdl.handle.net/10251/13702Archivo delegad

    Compañeros y héroes. Adiestramiento, legislación y bienestar de los perros de trabajo

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    Treball presentat a l'assignatura de Deontologia i Veterinària Legal (21223

    Differences in Grand Slam competition statistics between professional and U-18 players according to the sex

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    The aim of the study was to determine the differences in competition statistics between professional and under-18 (U-18) players by sex. A total of 546 official matches of Grand Slam were selected (268 male and 278 female). The data was obtained from the official website of the tournaments. Different variables related to match time, serve, return and winners-unforced errors were analysed. Descriptive analysis and a Mann-Whitney U test to analyse the differences between professional players and U-18 players were performed. Likewise, to estimate which variables obtained the greatest significant differences was conducted a discriminant analysis. ATP players played longer sets and matches, had a better serve performance and hitting more winners than U-18 male players. Junior male players increased their return effectivity and hit fewer unforced errors than ATP players (p<0.001). WTA players hit less double faults, had a better percentage of first serve-in and hit more winners than U-18 female players. Junior female hit less unforced errors than WTA players (p< 0.001). Moreover, the key differences between professional and junior players both males and females were the number of winners and unforced errors per set. Further, the match time and aces hitting were key factors that differentiated ATP players from U-18 male players. These data would be help coaches to design junior’s trainings programs, improving their performance based on key professional stage factors

    On the consistent treatment of the quasi-hydrostatic layers in hot star atmospheres

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    Context. Spectroscopic analysis remains the most common method to derive masses of massive stars, the most fundamental stellar parameter. While binary orbits and stellar pulsations can provide much sharper constraints on the stellar mass, these methods are only rarely applicable to massive stars. Unfortunately, spectroscopic masses of massive stars heavily depend on the detailed physics of model atmospheres. Aims. We demonstrate the impact of a consistent treatment of the radiative pressure on inferred gravities and spectroscopic masses of massive stars. Specifically, we investigate the contribution of line and continuum transitions to the photospheric radiative pressure. We further explore the effect of model parameters, e.g., abundances, on the deduced spectroscopic mass. Lastly, we compare our results with the plane-parallel TLUSTY code, commonly used for the analysis of massive stars with photospheric spectra. Methods. We calculate a small set of O-star models with the Potsdam Wolf-Rayet (PoWR) code using different approaches for the quasi-hydrostatic part. These models allow us to quantify the effect of accounting for the radiative pressure consistently. We further use PoWR models to show how the Doppler widths of line profiles and abundances of elements such as iron affect the radiative pressure, and, as a consequence, the derived spectroscopic masses. Results. Our study implies that errors on the order of a factor of two in the inferred spectroscopic mass are to be expected when neglecting the contribution of line and continuum transitions to the radiative acceleration in the photosphere. Usage of implausible microturbulent velocities, or the neglect of important opacity sources such as Fe, may result in errors of approximately 50% in the spectroscopic mass. A comparison with TLUSTY model atmospheres reveals a very good agreement with PoWR at the limit of low mass-loss rates.The first author of this work (A.S.) is supported by the Deutsche Forschungsgemeinschaft (DFG) under grant HA 1455/22. T.S. is grateful for financial support from the Leibniz Graduate School for Quantitative Spectroscopy in Astrophysics, a joint project of the Leibniz Institute for Astrophysics Potsdam (AIP) and the Institute of Physics and Astronomy of the University of Potsdam. A.S. would like to thank the Aspen Center for Physics and the NSF Grant #1066293 for hospitality during the invention and writing of this paper

    Discussing the physical meaning of the absorption feature at 2.1 keV in 4U 1538–52

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    High resolution X-ray spectroscopy is a powerful tool for studying the nature of the matter surrounding the neutron star in X-ray binaries and its interaction between the stellar wind and the compact object. In particular, absorption features in their spectra could reveal the presence of atmospheres of the neutron star or their magnetic field strength. Here we present an investigation of the absorption feature at 2.1 keV in the X-ray spectrum of the high mass X-ray binary 4U 1538–52 based on our previous analysis of the XMM-Newton data. We study various possible origins and discuss the different physical scenarios in order to explain this feature. A likely interpretation is that the feature is associated with atomic transitions in an O/Ne neutron star atmosphere or of hydrogen and helium like Fe or Si ions formed in the stellar wind of the donor.This work was supported by the Spanish Ministry of Education and Science “De INTEGRAL a IXO: binarias de rayos X y estrellas activas”, project number AYA2010-15431, partially by GV2014/088 and MIF/14G04. JJRR acknowledges the support by the Spanish Ministerio de Educación y Ciencia under grant PR2009-0455 and by the Vicerectorat d’Investigació, Desenvolupament i Innovació de la Universitat d’Alacant under grant GRE12-35

    Orbital phase-resolved spectroscopy of 4U 1538−52 with MAXI

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    Context. 4U 1538−52, an absorbed high mass X-ray binary with an orbital period of ~3.73 days, shows moderate orbital intensity modulations with a low level of counts during the eclipse. Several models have been proposed to explain the accretion at different orbital phases by a spherically symmetric stellar wind from the companion. Aims. The aim of this work is to study both the light curve and orbital phase spectroscopy of this source in the long term. In particular, we study the folded light curve and the changes in the spectral parameters with orbital phase to analyse the stellar wind of QV Nor, the mass donor of this binary system. Methods. We used all the observations made from the Gas Slit Camera on board MAXI of 4U 1538−52 covering many orbits continuously. We obtained the good interval times for all orbital phase ranges, which were the input for extracting our data. We estimated the orbital period of the system and then folded the light curves, and we fitted the X-ray spectra with the same model for every orbital phase spectrum. We also extracted the averaged spectrum of all the MAXI data available. Results. The MAXI spectra in the 2–20 keV energy range were fitted with an absorbed Comptonisation of cool photons on hot electrons. We found a strong orbital dependence of the absorption column density but neither the fluorescence iron emission line nor low energy excess were needed to fit the MAXI spectra. The variation in the spectral parameters over the binary orbit were used to examine the mode of accretion onto the neutron star in 4U 1538−52. We deduce a best value of Ṁ/v∞ = 0.65 × 10-9M⊙ yr-1/ (km s-1) for QV Nor.Part of this work was supported by the Spanish Ministry of Economy and Competitiveness project numbers ESP2013-48637-C2-2P, and ESP2014-53672-C3-3-P, by the Vicerectorat d’Investigació, Desenvolupament i Innovació de la Universitat d’Alacant project number GRE12-35, and by the Generalitat Valenciana project number GV2014/088. This research made use of MAXI data provided by RIKEN, JAXA, and the MAXI team. J.J.R.R. acknowledges the support by the Matsumae International Foundation Research Fellowship No14G04, and also thanks the entire MAXI team for the collaboration and hospitality in RIKEN. The work of A.G.G. has been supported by the Spanish MICINN under FPI Fellowship BES-2011-050874 associated to the project AYA2010-15431. T.M. acknowledges the grant by the Vicerectorat d’Investigació, Desenvolupament i Innovació de la Universitat d’Alacant under visiting researcher programme INV14-11

    Análisis del golpeo de fondo en jóvenes jugadores de tenis en una competición modificada mediante sensores inteligentes

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    Use of smart devices to show the effect of modification rules and sports equipment on technical-tactical behavior in training stages, opens a new field of study to improve the teaching-learning processes. The objective of the study is to use the smart sensor “Zepp Tennis 2.2.1”, to know the impact of a modified competition (net height = 0.80m and field dimensions = 18.00x8.23m) in under-10 tennis players, according to the comprehensive approach criteria of optimization. The hits (n =7758) during 40 matches played by 20 players (average age = 9.46 ± 0.66 years) were the unit analysis. The study variables were as follows; a) number of strokes, b) percentage of hits impact in sweet spot racket; c) ball speed; and d) ball spin. The results show as follow: a) an increase in the use of flat strokes over topspin and slice; and b) scarce flat and slice play of the flat backhand appearance, nevertheless they show better values of linear and rotational speed than forehands. Decrease net height and court dimensions promote offensive behaviors in young tennis players. This offensive behavior coincides with the recommendations that encourage comprehensive approach to develop an optimal teaching-learning process.&nbsp;La utilización de dispositivos inteligentes para observar el efecto de la modificación de reglas y equipamientos deportivos sobre las conducta técnico-táctica en etapas de formación, abre un nuevo campo de estudio en la mejora de los procesos de enseñanza-aprendizaje. El objetivo de estudio es utilizar el sensor inteligente “Zepp Tennis 2.2.1”, para conocer el impacto de una competición modificada (altura de la red= 0,80m y dimensiones del campo= 18,00x8,23m) en jugadores de tenis sub-10, atendiendo a los criterios de optimización de las enseñanzas comprensivas. La unidad de análisis fueron los golpeos ejecutados (n=7758) en 40 partidos por 20 jugadores (edad media= 9.46±0.66 años). Las variables de estudio son: a) número de golpeos; b) porcentaje de golpes que impactan en el punto dulce de la raqueta; c) velocidad de bola; y d) revoluciones por minuto de la pelota. Los resultados más destacables son: a) un aumento del uso de golpeos planos sobre los de efecto liftado y cortado; y b) escasa aparición en juego del revés plano y cortado, aunque muestren mejores valores de velocidad lineal y rotacional que los golpeos de derecha. La reducción de la altura de la red y las dimensiones del campo inducen a los jóvenes jugadores a una conducta ofensiva de juego. Este comportamiento ofensivo, coincide con las recomendaciones que promueven las enseñanzas comprensivas sobre un proceso de enseñanza-aprendizaje óptimo.&nbsp

    Análisis del golpeo de fondo en jóvenes jugadores de tenis en una competición modificada mediante sensores inteligentes

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    La utilización de dispositivos inteligentes para observar el efecto de la modificación de reglas y equipamientos deportivos sobre las conducta técnico-táctica en etapas de formación, abre un nuevo campo de estudio en la mejora de los procesos de enseñanza-aprendizaje. El objetivo de estudio es utilizar el sensor inteligente “Zepp Tennis 2.2.1”, para conocer el impacto de una competición modificada (altura de la red= 0,80m y dimensiones del campo= 18,00x8,23m) en jugadores de tenis sub-10, atendiendo a los criterios de optimización de las enseñanzas comprensivas. La unidad de análisis fueron los golpeos ejecutados (n=7758) en 40 partidos por 20 jugadores (edad media= 9.46±0.66 años). Las variables de estudio son: a) número de golpeos; b) porcentaje de golpes que impactan en el punto dulce de la raqueta; c) velocidad de bola; y d) revoluciones por minuto de la pelota. Los resultados más destacables son: a) un aumento del uso de golpeos planos sobre los de efecto liftado y cortado; y b) escasa aparición en juego del revés plano y cortado, aunque muestren mejores valores de velocidad lineal y rotacional que los golpeos de derecha. La reducción de la altura de la red y las dimensiones del campo inducen a los jóvenes jugadores a una conducta ofensiva de juego. Este comportamiento ofensivo, coincide con las recomendaciones que promueven las enseñanzas comprensivas sobre un proceso de enseñanza-aprendizaje óptimo

    Searching for unknown counterparts in X-ray binary systems using Virtual Observatory tools

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    In the framework of an ongoing programme, we have developed strategies to discover and characterize optical/infrared unknown counterparts to X-ray binary systems using the standard tools of the Virtual Observatory. First, we have selected some potential candidates from different X-ray catalogues. Then we have used the Virtual Observatory tools to search for optical and infrared point data sources that were coincident with the position of the X-ray source. In this work we present some examples of our ongoing programme showing the potential of the Virtual Observatory as a discovery tool.Part of this work was supported by the Spanish Ministry of Education and Science project number AYA2010-15431, by the Vicerectorat d'Investigació, Desenvolupament i Innovació de la Universitat d'Alacant project number GRE12-35, and by the Generalitat Valenciana project number GV2014/088. JJRR acknowledges the support by the Matsumae International Foundation Research Fellowship program 2014, No14G04
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