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Hunedoara, Romania

The West University of Timișoara is a university located in Timișoara, Romania. Established in 1962, it is organized in 11 Faculties.In the 2012 QS World University Rankings it was included in Top 700 universities of the world. Another three Romanian universities have entered the prestigious top. Wikipedia.

Cotaescu I.I.,West University of Timisoara
General Relativity and Gravitation | Year: 2011

We study the Lie algebras of the covariant representations transforming the matter fields under the de Sitter isometries. We point out that the Casimir operators of these representations can be written in closed forms and we deduce how their eigenvalues depend on the field's rest energy and spin. For the scalar, vector and Dirac fields, which have well-defined field equations, we express these eigenvalues in terms of mass and spin obtaining thus the principal invariants of the theory of free fields on the de Sitter spacetime. We show that in the flat limit we recover the corresponding invariants of the Wigner irreducible representations of the Poincaré group. © 2011 Springer Science+Business Media, LLC. Source

Petcu D.,West University of Timisoara
MultiCloud 2013 - Proceedings of the International Workshop on Multi-Cloud Applications and Federated Clouds | Year: 2013

Using resources and services from multiple Clouds is a natural evolution from consuming the ones from in-silo Clouds. Technological and administrative barriers are however slowing the process. Fortunately the recent years are marked by the appearance of several solutions that are partially overpassing them. However, the approaches are quite various and not adopted at large scale. This paper intends to offer a snapshot of the current state-of-the-art and to identify the future steps in building Multi-Clouds. A list of basic requirements for a Multi-Cloud is proposed. Copyright 2013 ACM. Source

Blaga R.,West University of Timisoara
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2015

We study the one-photon scalar pair production QED process on the expanding de Sitter spacetime. Using perturbation theory, we obtain the transition probability and study its properties as a function of the expansion parameter ω. On flat space the process is forbidden by energy-momentum conservation. It is expected that for a dynamical background there is an energy exchange correlate to the strength of the gravitational field. We use momentum space plots and compute the mean production angle to illustrate this. We show that the mean angle grows with ω, but also find that in the flat limit the fall-off is unexpectedly slow. To investigate this further we obtain the probability around different angular configuration, at leading order in m/ω, and find that the ω dependence at small angles is very weak. We comment on the possible astrophysical implications. © 2015 American Physical Society. Source

Petcu D.,West University of Timisoara
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2011

The greatest challenge beyond trust and security for the long-term adoption of cloud computing is the interoperability between clouds. In the context of world-wide tremendous activities against the vendor lock-in and lack of integration of cloud computing services, keeping track of the new concepts and approaches is also a challenge. We considered useful to provide in this paper a snapshot of these concepts and approaches followed by a proposal of their classification. A new approach in providing cloud portability is also revealed. © 2011 Springer-Verlag. Source

Bica I.,West University of Timisoara
Journal of Industrial and Engineering Chemistry | Year: 2012

This paper deals with the process of achievement of anisotropic magnetorheological elastomers (MREs), based on silicone rubber and iron nanoparticles. Plane capacitors are manufactured with MREs. The capacity C of the plane capacitors is measured as function of the intensity H of the magnetic field. By using the approximation of the dipolar magnetic moment and the ideal elastic body model, respectively, the tensions and deformations field and respectively the elasticity module of MREs function of H have been determined, for magnetic field values of up to 1000. kA/m. The obtained results are presented and discussed. © 2012 The Korean Society of Industrial and Engineering Chemistry. Source

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