Lorentzian Geometry
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Estudo acústico de tubos de dimensões idênticas e materiais diferentes utilizando bocais de flauta doce e flauta transversal
Even though scientists have shown so far that the materials used in the construction of flutes has little interference in their respective sound characteristics, it seems that there is more to be discussed, because many musicians still insist that the material used in the construction of flutes influences significantly the sound produced. Thus, aiming to sea
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/08/2011
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2. Aspectos estruturais e dinâmicos da correspondência AdS/CFT: Uma abordagem rigorosa / Structural and Dynamical Aspects of the AdS/CFT Correspondence: a Rigorous Approach
Elaboramos um estudo detalhado de alguns aspectos d(e uma versão d)a correspondência AdS/CFT, conjeturada por Maldacena e Witten, entre teorias quânticas de campo num fundo gravitacional dado por um espaço-tempo assintoticamente anti-de Sitter (AAdS), e teorias quânticas de campos conformalmente covariantes no infinito conforme (no sentido de Penrose) d
Publicado em: 2007
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3. Characterization of Cs2NaAIF6:Cr3+ and Cs2NaGaF6:Fe3+ single crystals by electron paramagnetic resonance / Caracterização dos monocristais Cs2NaAIF6:Cr3+ e Cs2NaGaF6:Fe3+ por meio de ressonancia paramagnetica eletronica
The interest in materials with large bands of absorption and luminescence is due to the possibility of their applications as tunable solid state lasers. The crystals Cs2NaAlF6:Cr3+ and Cs2NaGaF6:Fe3+ present these properties and , naturally, some of their physical characteristics, such as the crystal field , are decisive for their optical activity and should
Publicado em: 2006
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4. Quantum cosmology: how to interpret and obtain results
We argue that the Copenhagen interpretation of quantum mechanics cannot be applied to quantum cosmology. Among the alternative interpretations, we choose to apply the Bohm-de Broglie interpretation of quantum mechanics to canonical quantum cosmology. For minisuperspace models, we show that there is no problem of time in this interpretation, and that quantum
Brazilian Journal of Physics. Publicado em: 2000-06
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5. The boundary value problem for maximal hypersurfaces
A spacelike hypersurface (condimension 1) in a Lorentzian manifold is called a maximal surface if it extremizes the hypervolume functional. Although maximal surfaces are superficially analogous to minimal hypersurfaces in Riemannian geometry, their properties can be dramatically different, as can be seen from the validity of Bernstein's theorem in all dimens