General Relativity
Mostrando 13-24 de 93 artigos, teses e dissertações.
-
13. Líquidos nemáticos e relatividade geral
In the mean 80´s, it was proposed that the rheologic properties of liquidcrystal could be obtained through affine transformation, in which the interaction potential of aspheric molecule is deformed to assume the ellipsoidal shape of potential liquid crystal´smolecular interaction. When this procedure is done point to point, the usuals derivatives donot get
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2010
-
14. Natação em espaços curvos via teoria de calibre / A gauge theory approach to the swimming in curved spaces problem
No espaço euclidiano, deformações de corpos quase-rígidos podem gerar rotações globais líquidas que obedecem, em cada instante, a lei de conservação do momento angular (o problema do gato caindo é um exemplo). Em espaços curvos, um ciclo de deformações de um corpo pode gerar não só rotações, mas também translações globais. Este fenômeno
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/05/2010
-
15. Sobre algumas soluções das equações de Einstein com constante cosmológica
In this work, through appropriate coordinate transformations and using Einsteins equations of the general relativity, we show a method to get, from the Minkowski metric, the metric of Friedmann-Lemaıtre-Robertson-Walker, used in cosmology, with the energy-momentum tensor of a perfect isotropic fluid. We obtain also an apparently new solution to Einstein
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/03/2010
-
16. Pulsar binary systems in a nonsymmetric theory of gravitation II. Dipole radiation
This paper deals with the emission of gravitational radiation in the context of a previously studied metric nonsymmetric theory of gravitation. The part coming from the symmetric part of the metric coincides with the mass quadrupole moment result of general relativity. The one associated to the antisymmetric part of the metric involves the dipole moment of t
Brazilian Journal of Physics. Publicado em: 2010-12
-
17. Energy momentum complex
We show that the definition of the energy- momentum complex given by Møller using Weitzenböck space- time in the calculations of gravitational energy gives results which are different from those obtained from other definitions given in the framework of general relativity.
Brazilian Journal of Physics. Publicado em: 2010-09
-
18. Bianchi type I tilted cosmological model for barotropic perfect fluid distribution with heat conduction in general relativity
Bianchi Type I tilted cosmological model for barotropic perfect fluid distribution with heat conduction is investigated.To get the deterministic solution, we have assumed barotropic condition p = γ ∈ ,0 < γ < 1, p being isotropic pressure, ∈ the matter density and a supplementary condition between metric potentials A, B, C as A = (BC)n where n is the c
Brazilian Journal of Physics. Publicado em: 2010-09
-
19. Energy in an expanding universe in the teleparallel geometry
The main purpose of this paper is to explicitly verify the consistency of the energy-momentum and angular momentum tensor of the gravitational field established in the Hamiltonian structure of the Teleparallel Equivalent of General Relativity (TEGR). In order to reach these objectives, we obtained the total energy and angular momentum (matter plus gravitatio
Brazilian Journal of Physics. Publicado em: 2010-03
-
20. Violação de Lorentz e teoria de gravitação modificada
In this thesis we study the Lorentz and CPT symmetries breaking in a 4D fourfermions model at zero and at finite temperature. At zero temperature we find that these symmetries can be violated, but at finite temperature we show that there is a critical temperature at which the Lorentz and CPT symmetries are restored. We show that it is possible obtain the Fri
Publicado em: 2010
-
21. Ação rescisória por violação da norma jurídica / Rescission action for violation of rule of law
This work aims to study the main controversial aspects of rescission action on the basis of item V of art. 485 of the Civil Procedure Code or simply rescission action for violation of rule of law. To reach the central theme, I choose to analyze the assumptions of no place of rescission action: sentence and res judicata. Also examine, in general, the rescissi
Publicado em: 2010
-
22. RIGHT TO HEALTH IN BRAZIL: THE VERIFIED EXCESSES AND THE NECESSITY TO ESTABLISH LIMITS ON THE MATERIAL BENEFITS OF THE STATE / DIREITO À SAÚDE NO BRASIL: DOS EXCESSOS VERIFICADOS E DA NECESSIDADE DE ESTABELECIMENTO DE LIMITES ÀS PRESTAÇÕES MATERIAIS DO ESTADO
O clamor pela ampla realização material dos direitos sociais no Brasil atingiu elevados níveis neste início de século XXI. Uma vez reconhecidos formalmente pela Constituição Federal de 1988 como direitos fundamentais e, por isso mesmo, conformadores do núcleo base de nosso ordenamento jurídico, os direitos sociais ultrapassaram o nível da discussã
Publicado em: 2010
-
23. Direito quântico: revisitação e hipóteses de aplicação ao direito contemporâneo
After almost five centuries since the Scientific Revolution, the symptoms of a severe paradigmatic change are finally visible to the eyes of science. Until then, the mechanicist model that lead the scientific attitude was based on general laws os nature, which were able to determine the behaviour of beings in any given space and time. Its epistemological pre
Publicado em: 2010
-
24. Dark Energy and The Accelerating Universe: Conceptual Aspects and Observational Tests / Energia escura e aceleração do Universo: Aspectos conceituais e testes observacionais
In the last decade, the extraordinary progress of the astronomical observations (distances with supernovas, matter and cosmic background radiation (CBR) power spectrum, X-ray surface brightness of galaxy clusters, etc) associated with important theoretical developments turned Cosmology one of the most exciting frontiers of contemporary science. In this thesi
Publicado em: 2010