Search results for " física"
showing 10 items of 920 documents
Combined performance studies for electrons at the 2004 ATLAS combined test-beam
2010
In 2004 at the ATLAS (A Toroidal LHC ApparatuS) combined test beam, one slice of the ATLAS barrel detector (including an Inner Detector set-up and the Liquid Argon calorimeter) was exposed to particles from the H8 SPS beam line at CERN. It was the first occasion to test the combined electron performance of ATLAS. This paper presents results obtained for the momentum measurement p with the Inner Detector and for the performance of the electron measurement with the LAr calorimeter (energy E linearity and resolution) in the presence of a magnetic field in the Inner Detector for momenta ranging from 20 GeV/c to 100 GeV/c. Furthermore the particle identification capabilities of the Transition Ra…
Measurement of the production cross section of jets in association with a Z boson in pp collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
2013
Measurements of the production of jets of particles in association with a Z boson in pp collisions at s√ = 7 TeV are presented, using data corresponding to an integrated luminosity of 4.6 fb[superscript −1] collected by the ATLAS experiment at the Large Hadron Collider. Inclusive and differential jet cross sections in Z events, with Z decaying into electron or muon pairs, are measured for jets with transverse momentum p [subscript T] > 30 GeV and rapidity |y| < 4.4. The results are compared to next-to-leading-order perturbative QCD calculations, and to predictions from different Monte Carlo generators based on leading-order and next-to-leading-order matrix elements supplemented by parton sh…
Decision Making Impairment: A Shared Vulnerability in Obesity, Gambling Disorder and Substance Use Disorders?
2016
Introduction Addictions are associated with decision making impairments. The present study explores decision making in Substance use disorder (SUD), Gambling disorder (GD) and Obesity (OB) when assessed by Iowa Gambling Task (IGT) and compares them with healthy con- trols (HC). Methods For the aims of this study, 591 participants (194 HC, 178 GD, 113 OB, 106 SUD) were assessed according to DSM criteria, completed a sociodemographi c interview and con- ducted the IGT. Results SUD, GD and OB present impaired decision making when compared to the HC in the over- all task and task learning, however no differences are found for the overall performanc e inthe IGT among the clinical groups. Results…
Rovibrational structure of the Ar–CO complex based on a novel three-dimensional ab initio potential
2002
The first three-dimensional ab initio intermolecular potential energy surface of the Ar–CO van der Waals complex is calculated using the coupled cluster singles and doubles including connected triples model and the augmented correlation-consistent polarized valence quadruple zeta (aug-cc-pVQZ) basis set extended with a (3s3p2d1f1g) set of midbond functions. The three-dimensional surface is averaged over the three lowest vibrational states of CO. Rovibrational energies are calculated up to 50 cm−1 above the ground state, thus enabling comprehensive comparison between theory and available experimental data as well as providing detailed guidance for future spectroscopic investigations of highe…
Study of the benzene⋅N2 intermolecular potential-energy surface
2003
The intermolecular potential-energy surface pertaining to the interaction between benzene and N2 is investigated theoretically and experimentally. Accurate intermolecular interaction energies are evaluated for the benzene–N2 van der Waals complex using the coupled cluster singles and doubles including connected triples [CCSD(T)] method and the aug-cc-pVDZ basis set extended with a set of 3s3p2d1f1g midbond functions. After fitting the energies to an analytic function, the intermolecular Schrödinger equation is solved to yield energies, rotational constants, and Raman-scattering coefficients for the lowest intermolecular levels of several benzene–N2 isotopomers. Experimentally, intermolecula…
Computational and experimental investigation of intermolecular states and forces in the benzene-helium van der Waals complex
2003
A study of the intermolecular potential-energy surface (IPS) and the intermolecular states of the perprotonated and perdeuterated benzene–He complex is reported. From a fit to ab initio data computed within the coupled cluster singles and doubles including connected triples model for 280 interaction geometries, an analytic IPS including two- to four-body atom–atom terms is obtained. This IPS, and two other Lennard-Jones atom–atom surfaces from the literature, are each employed in dynamically exact (within the rigid-monomer approximation) calculations of J = 0 intermolecular states of the isotopomers. Rotational constants and Raman-scattering coefficients for intermolecular vibrational trans…
Multiconfigurational second-order perturbation study of the decomposition of the radical anion of nitromethane
2004
The doublet potential energy surfaces involved in the decomposition of the nitromethane radical anion (CH(3)NO(2) (-)) have been studied by using the multistate extension of the multiconfigurational second-order perturbation method (MS-CASPT2) in conjunction with large atomic natural orbital-type basis sets. A very low energy barrier is found for the decomposition reaction: CH(3)NO(2) (-)--[CH(3)NO(2)](-)--CH(3)+NO(2) (-). No evidence has been obtained on the existence of an isomerization channel leading to the initial formation of the methylnitrite anion (CH(3)ONO(-)) which, in a subsequent reaction, would yield nitric oxide (NO). In contrast, it is suggested that NO is formed through the …
The teacher of physical education in primary textbooks
2019
El objetivo del presente estudio es analizar cómo se representa a la maestra de educación física en los libros de texto de esta área, en la etapa de Educación Primaria. Se realiza un estudio cuantitativo que muestra un número elevado de maestras con respecto al maestro de educación física, principalmente en el primer ciclo de Primaria y otro cualitativo, a través del análisis de contenido, identificando un tratamiento estereotipado en cuanto a las características físicas de la docente, al representar a una maestra eminentemente joven, de raza blanca, delgada, con ropa deportiva y sin discapacidad. Pero a la vez, aparece un tratamiento más abierto y participativo en cuanto al rol representad…
¿Qué representan las portadas de los libros de texto de Educación Física en Primaria?
2018
Resumen. Este estudio analiza la imagen del cuerpo representado en las portadas de los libros de texto de Educación Física vinculado a un tipo de actividad física, para comprobar si se ajustan a las directrices que marca la legislación actual con respecto a los materiales curriculares. El estudio es de tipo empírico, descriptivo y comparativo entre los libros de texto analizados. La muestra estuvo constituida por 12 portadas de dos editoriales, publicadas bajo la Ley Orgánica 8/2013 para la Mejora de la Calidad Educativa (LOMCE). La técnica de investigación fue el análisis de contenido a través de la herramienta SAIMEF (Sistema de Análisis de Imágenes en Educación Física). Se realizó un aná…
Hidden curriculum and Physical Education: a systematic review
2016
El objetivo del presente estudio se centra en conocer y analizar los estudios sobre currículum oculto en Educación Física escolar a partir de una revisión sistemática de los artículos publicados en la base de datos Web of Science® (WoS). La investigación desarrollada tiene un enfoque cuantitativo, de carácter exploratorio y descriptivo, que incluye técnicas de investigación documental. Para la realización de la búsqueda se utilizaron los términos “Hidden Curriculum” y “Physical Education”. A partir de la búsqueda realizada se han encontrado 22 artículos que han sido analizados. Se presentan hallazgos sobre revistas más productivas respecto al tema objeto de estudio, autores e instituciones …