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Search Results: 1 - 10 of 407695 matches for " Jose M. Cerveró "
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Exact Propagator of a Two Dimensional Anisotropic Harmonic Oscillator in the Presence of a Magnetic Field  [PDF]
Jose M. Cerveró
Journal of Modern Physics (JMP) , 2017, DOI: 10.4236/jmp.2017.84032
Abstract: In this paper we solve exactly the problem of the spectrum and Feynman propagator of a charged particle submitted to both an anharmonic oscillator in the plane and a constant and homogeneous magnetic field of arbitrary strength aligned with the perpendicular direction to the plane. As we shall see in the beginning of the letter, the Hamiltonian, being a quadratic form, is easily diagonalizable and the Classical Action can be used to construct the exact Feynman Propagator using the Stationary Phase Approximation. The result is useful for the treatment of quasi two dimensional samples in the field of magnetic effects in nano-structures and quantum optics. The presented solution, after minor extensions, can also be used for motion in three dimensions, and in fact it has been used for years in such cases. Also it can be used as a good exercise of a Feynman Path Integral that can be calculated easily with just the help of the Classical Action.
A Note on the Lie Algebra of the Invariants in the CBS Nonlinear Equation  [PDF]
Jose M. Cerveró
Journal of Modern Physics (JMP) , 2018, DOI: 10.4236/jmp.2018.96078
Abstract: In this short note, a particular realization of the vector fields that form a Lie Algebra of symmetries for the Calogero-Bogoyavleskii-Schiff equation is found. The Lie Algebra is examined and the result is a semidirect product of two Lie Groups. The structure of the semidirect product is examined through the table of commutation rules. Two reductions are made with the help of two sets of generators and the final outcome for the solution is related to the elliptic Painlevé P(ξ)-function.
Proyecto ALIADO: Un código multidisciplinar de buena práctica para el control del dolor oncológico The ALIADO Project: A multidisciplinary good practice code for the management of cancer pain
F. Cerveró
Revista de la Sociedad Espa?ola del Dolor , 2011,
Abstract:
Estudi sobre la investigació doctoral: 10 anys de tesis a Ciències de L'Educació a la Universitat de Barcelona (1979-1989)
Virgínia Ferrer Cerveró,Júlia Parrilla,M. José Rubio,Joana M. Sancho
Temps d'Educació , 1992,
Abstract:
La formació del professorat universitari: sinopsi d'un informe
Virgínia Ferrer Cerveró
Temps d'Educació , 1992,
Abstract:
Las competencias y el uso de las Tecnologías de Información y Comunicación (TIC) por el profesorado: estructura dimensional
Almerich Cerveró, Gonzalo;Suárez Rodríguez, Jesús M.;Jornet Meliá, Jesús M.;Orellana Alonso, María Natividad;
Revista electrónica de investigación educativa , 2011,
Abstract: this article presents the results of a study on the competencies possessed by the faculty of elementary-school and junior-high-school teachers (of compulsory and post-compulsory education) in valencia (spain), as concerning the use of information and communication technologies (ict). we worked with a stratified random sample of 868 teachers, and analyzed their competencies in two areas: personal-professional use, and the use they make of ict in the classroom. although the study is based on various analyses, its contribution to categorical principal components analysis (catpca) should be emphasized for the dimensional analysis and determination of the relationship of these dimensions with other variables of interest. the paper contributes results of interest as regards planning the integration of ict into schools, as well as pertaining to teacher training for the pedagogical integration of ict.
Large Gravitational Wave Background Signals in Electroweak Baryogenesis Scenarios
Jose M. No
Physics , 2011, DOI: 10.1103/PhysRevD.84.124025
Abstract: The bubble wall velocity in an electroweak first order phase transition is a key quantity both for electroweak baryogenesis and for the production of a stochastic background of gravitational waves that may be probed in the future through gravitational wave experiments like LISA or BBO. We show that, contrary to the conclusion drawn from previous studies, it is actually possible to generate a potentially large gravitational wave signal while satisfying the requirements for viable electroweak baryogenesis, once the effects of the hydrodynamics of bubble growth are taken into account. Then, the observation of a large gravitational wave background from the electroweak phase transition would not necessarily rule out electroweak baryogenesis as the mechanism having generated the observed baryon asymmetry of the universe.
An SDRAM test education package that embeds the factory equipment into the e-learning server
Jose M. M. Ferreira
International Journal of Online Engineering (iJOE) , 2008,
Abstract: SDRAM (Synchronous Dynamic Random Access Memory) demand has grown exponentially since the 1980s, as a result of technological factors and new areas of application, particularly concerning communication and consumer electronics. The SDRAM market represented in 2007 c. 20% of the total semiconductor business and is seen as a strategic area, justifying private and public investment in the western and far-eastern economic communities. SDRAM test education is therefore an important subject, but very high purchase and maintenance costs keep test equipment beyond reach of most university test courses. This paper presents a pilot project addressing an SDRAM test education course developed jointly by Qimonda and the University of Porto (FEUP), where the company offers remote access to one if its Advantest SDRAM automatic test equipments. Access to this remote tester was embedded into the Moodle e-learning server that supports a new course entitled Electronic Systems Testing (TSEL), which is part of the Integrated Masters degree on Electrical and Computer Engineering at FEUP. The excellent feedback received from students encouraged us to extend this cooperation into an educational network, which is also introduced in this paper.
General Electric-Magnetic decomposition of fields, positivity and Rainich-like conditions
Jose M M Senovilla
Physics , 2000,
Abstract: We show how to generalize the classical electric-magnetic decomposition of the Maxwell or the Weyl tensors to arbitrary fields described by tensors of any rank in general $n$-dimensional spacetimes of Lorentzian signature. The properties and applications of this decomposition are reviewed. In particular, the definition of tensors quadratic in the original fields and with important positivity properties is given. These tensors are usually called "super-energy" (s-e) tensors, they include the traditional energy-momentum, Bel and Bel-Robinson tensors, and satisfy the so-called Dominant Property, which is a straightforward generalization of the classical dominant energy condition satisfied by well-behaved energy-momentum tensors. We prove that, in fact, any tensor satisfying the dominant property can be decomposed as a finite sum of the s-e tensors. Some remarks about the conservation laws derivable from s-e tensors, with some explicit examples, are presented. Finally, we will show how our results can be used to provide adequate generalizations of the Rainich conditions in general dimension and for any physical field.
Minimal violation of flavour and custodial symmetries in a vectophobic Two-Higgs-Doublet-Model
Elvira Cerveró,Jean-Marc Gérard
Physics , 2012, DOI: 10.1016/j.physletb.2012.05.010
Abstract: Tree-level accidental symmetries are known to play a fundamental role in the phenomenology of the Standard Model (SM) for electroweak interactions. So far, no significant deviations from the theory have been observed in precision, flavour and collider physics. Consequently, these global symmetries are expected to remain quite efficient in any attempt beyond the SM. Yet, they do not forbid rather unorthodox phenomena within the reach of current LHC experiments. This is illustrated with a vectophobic Two-Higgs-Doublet-Model (2HDM) where effects of a light, flavour-violating and custodian (pseudo)scalar might be observed in the $B_s\to\mu^+\mu^-$ decay rate and in the diphoton invariant mass spectrum at around 125 GeV.
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