Search results for "Físicas"
showing 10 items of 251 documents
Enseñanza de los conceptos de cantidad de sustancia y de mol basada en un modelo de aprendizaje como investigación orientada
2007
This study deals with the design and implementation of a research on the concepts of «amount of substance» and «mol». This work is grounded on a constructivistic conception of the learning of Sciences, more particularly on the model known as teaching-learning as oriented research. In accordance with this theoretical basis we have developed an empirical research framed within the teaching of Chemistry in High School. The developed designs have enabled us to assess the learning achieved by the students from a conceptual, procedural and attitudinal stance. According to our fi ndings we could say that the materials developed and the way we have worked with them have contributed to a more signif…
Didáctica de las ciencias experimentales y sociales
2003
Resumen basado en la publicación Este artículo trata sobre el científico británico Robert Boyle. En la primera parte del escrito se habla sobre que los historiadores de la ciencia, analizando los propios documentos de Boyle, han puesto de manifiesto como precedentes los trabajos de otros científicos, entre ellos: Evangelista Torricelli, Edmé Mariotte, Blaise Pascal, Henry Power, Richard Townley y William Croonelli, que contribuyeron, e incluso predijeron, la formulación de la conocida ley de Boyle. Sin embargo, ninguno de ellos fue capaz de anticiparse a la publicación de la misma, menos aún con la precisión, meticulosidad experimental, detalle y exactitud que la conseguida por Boyle, quien…
Restricciones físicas en mayores institucionalizados. Prevalencia, factores asociados e impacto sobre la funcionalidad del anciano
2017
Antecedentes: Hay una gran variabilidad de datos sobre la prevalencia y los factores que se asocian al uso de restricciones físicas en el medio institucional. Estos dispositivos son utilizados habitualmente para garantizar la seguridad de los ancianos o la integridad física de residentes y trabajadores. A pesar de su supuesta finalidad protectora, su aplicación puede originar consecuencias negativas tanto a nivel físico como psicológico, aumentando el riesgo de lesiones graves e incluso la muerte. Objetivos: Describir la prevalencia de restricciones físicas en los ancianos institucionalizados en 5 residencias de la provincia de Valencia, los factores asociados al uso de restricciones y el i…
Predicted gamma-ray image of SN 1006 due to inverse Compton emission
2009
We propose a method to synthesize the inverse Compton (IC) gamma-ray image of a supernova remnant starting from the radio (or hard X-ray) map and using results of the spatially resolved X-ray spectral analysis. The method is successfully applied to SN 1006. We found that synthesized IC gamma-ray images of SN 1006 show morphology in nice agreement with that reported by the H.E.S.S. collaboration. The good correlation found between the observed very-high energy gamma-ray and X-ray/radio appearance can be considered as an evidence that the gamma-ray emission of SN 1006 observed by H.E.S.S. is leptonic in origin, though the hadronic origin may not be excluded.
Measurement of the top quark charge in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
2013
A measurement of the top quark electric charge is carried out in the ATLAS experiment at the Large Hadron Collider using 2.05 fb[superscript −1] of data at a centre-of-mass energy of 7 TeV. In units of the elementary electric charge, the top quark charge is determined to be 0.64 ± 0.02 (stat.) ± 0.08 (syst.) from the charges of the top quark decay products in single lepton t[¯ over t] candidate events. This excludes models that propose a heavy quark of electric charge −4/3, instead of the Standard Model top quark, with a significance of more than 8σ.
Search for photonic signatures of gauge-mediated supersymmetry in 8TeV pp collisions with the ATLAS detector
2015
A search is presented for photonic signatures motivated by generalized models of gauge-mediated supersymmetry breaking. This search makes use of 20.3 fb[superscript −1] of proton-proton collision data at √s = 8 TeV recorded by the ATLAS detector at the LHC, and explores models dominated by both strong and electroweak production of supersymmetric partner states. Four experimental signatures incorporating an isolated photon and significant missing transverse momentum are explored. These signatures include events with an additional photon, lepton, b-quark jet, or jet activity not associated with any specific underlying quark flavor. No significant excess of events is observed above the Stand…
Ultra-High Energy Neutrinos at the Pierre Auger Observatory
2013
The observation of ultrahigh energy neutrinos (UHE nu s) has become a priority in experimental astroparticle physics. UHE nu s can be detected with a variety of techniques. In particular, neutrinos can interact in the atmosphere (downward-going nu) or in the Earth crust (Earth-skimming nu), producing air showers that can be observed with arrays of detectors at the ground. With the surface detector array of the Pierre Auger Observatory we can detect these types of cascades. The distinguishing signature for neutrino events is the presence of very inclined showers produced close to the ground (i.e., after having traversed a large amount of atmosphere). In this work we review the procedure and …
Normas de evaluación para la mejora de la aptitud física en los estudiantes del I.T.C.R.
2013
La medición y evaluación de la aptitud física han sido prácticas habituales en los cursos de actividad deportiva del ITCR. Sus resultados al compararlos con normas de referencia de otros contextos (España y Estados Unidos principalmente) han orientado juicios que por lo general otorgan una calificación baja a los estudiantes. La Actividad Física debe ser parte de la formación integral del profesional por la importancia que tiene para mejorar la calidad de vida y alcanzar un estado saludable tanto en el cuerpo como en la mente, el objetivo de la práctica física es buscar el esparcimiento para el relajamiento del estrés generado en la actividad académica. La medición y evaluación de la Condic…
Search for scalar leptoquarks in pp collisions at $\sqrt{s}$=13 TeV with the ATLAS experiment
2016
An inclusive search for a new-physics signature of lepton-jet resonances has been performed by the ATLAS experiment. Scalar leptoquarks, pair-produced in pp collisions at s √s = 13 TeV at the large hadron collider, have been considered. An integrated luminosity of 3.2 fb-1, corresponding to the full 2015 dataset was used. First (second) generation leptoquarks were sought in events with two electrons (muons) and two or more jets. The observed event yield in each channel is consistent with Standard Model background expectations. The observed (expected) lower limits on the leptoquark mass at 95% confidence level are 1100 and 1050 GeV (1160 and 1040 GeV) for first and second generation leptoqua…
Search for the Decay of the Higgs Boson to Charm Quarks with the ATLAS Experiment
2018
A direct search for the standard model Higgs boson decaying to a pair of charm quarks is presented. Associated production of the Higgs and Z bosons, in the decay mode ZH→ℓ+ℓ−c¯c is studied. A data set with an integrated luminosity of 36.1 fb−1 of pp collisions at √s=13TeV recorded by the ATLAS experiment at the LHC is used. The H→c¯c signature is identified using charm-tagging algorithms. The observed (expected) upper limit on σ(pp→ZH)×B(H→c¯c) is 2.7 (3.9+2.1−1.1) pb at the 95% confidence level for a Higgs boson mass of 125 GeV, while the standard model value is 26 fb.