Isotropy
Mostrando 1-12 de 23 artigos, teses e dissertações.
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1. Processing of large offset data: experimental seismic line from Tenerife Field, Colombia
ABSTRACT: Exploration seismology provides the main source of information about the Earth’s subsurface, which in many cases can be presented as a simple model of horizontal or near-horizontal layers. After the seismic acquisition step, conventional seismic processing of reflection data provides an image of the subsurface by using information about the refle
Braz. J. Geol.. Publicado em: 08/03/2018
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2. Einstein’s physical chronogeometry
ABSTRACT In Einstein’s physical geometry, the geometry of space and the uniformity of time are taken to be non-conventional. However, due to the stipulation of the isotropy of the one-way speed of light in the synchronization of clocks (or definition of simultaneity), as it stands, Einstein’s views do not seem to apply to the whole of the Minkowski space
Manuscrito. Publicado em: 2017-03
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3. Guias de onda com um ambiente para testes de uma eletrodinâmica com violação das simetrias de Lorentz e CPT / Waveguides as a way of testing an electrodynamics with broken Lorentz and CPT symmetries
We study a CPT- and Lorentz-odd electrodynamics in (3+1) dimensions, obtained by adding a Chern-Simons-like term to the usual Maxwell model, as described by the radiation sector of the Standard Model Extension. Once this term is proportional to a constant background "4-vector", (kAF), wich selects a preferred direction in the spacetime (breaking its isotropy
Publicado em: 2010
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4. Análise morfométrica 2D e 3D de amostras de osso trabecular utilizando microtomografia tridimensional por raio-X / 2D and 3D morphometric analysis of trabecular bone using X-ray tridimensional microtomography (müCT)
Trebecular bones have a porous microstructure and can be modeled as a linear elastic solid, heterogenous and anisotropic. The x-ray tridimensional microtomography (müCT) has been worldwide used for the assessment of trabecular bone in investigations related to bone quality and aimed to the diagnostic of bone metabolic diseases such as osteoporosis. In the l
Publicado em: 2009
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5. Teoria inflacionária em universos anisotrópicos / Inflationary theory in anisotropic universes
In this work we generalize the standard theory of cosmological perturbations to the case of homogeneous and anisotropic universes described by a Bianchi I spacetime metric. As an application of this theory we investigate the predictions of an inflationary anisotropic phase, both at the classical and quantum level. After discussing the evolution of the backgr
Publicado em: 2008
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6. Desenvolvimento, caracterizaÃÃo e estudo de permeaÃÃo cutÃnea de diclofenaco de dietilamÃnio em sistemas tÃpicos nanoemulsionados
The nanoemulsions (NE) are transparent, isotropic and thermodynamically stable systems, formed spontaneously under a specific set of experimental conditions from mixtures of water and oil phases stabilized by a surfactant or a mixture of surfactant and cosufactant. Because of their properties, especially the ability to carry lipophilic and hydrophilic drugs
Publicado em: 2008
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7. Refinamento de malhas isotrópicas e anisotrópicas e simplificação de malhas isotrópicas / Isotropic and anisotropic mesh refinement and isotropic mesh simplification
Em muitos problemas de simulação de fenômenos físicos ou fenômenos de engenharia, o uso das malhas é um componente muito importante. Uma malha é uma aproximação de uma dada geometria por um conjunto de elementos mais simples, tais como triângulos e quadriláteros (caso bidimensional) ou tetraedros, prismas, pirâmides e hexaedros (caso tridimension
Publicado em: 2007
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8. Space isotropy and weak equivalence principle in a scalar theory of gravity
We consider a preferred-frame bimetric theory in which the scalar gravitational field both influences the metric and has direct dynamical effects. A modified version ("v2") is built, by assuming now a locally-isotropic dilation of physically measured distances, as compared with distances evaluated with the Euclidean space metric. The dynamical equations stay
Brazilian Journal of Physics. Publicado em: 2006-03
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9. LOCAL ISOTROPY ASSUMPTION AND THE UNIVERSALITY OF THE KOLMOGOROV CONSTANT / A HIPÓTESE DE TURBULÊNCIA LOCALMENTE ISOTRÓPICA E A UNIVERSALIDADE DA CONSTANTE DE KOLMOGOROV
According to the Kolmogorov s fully developed turbulence theory established in 1941, there is an equilibrium range in which phenomenological quantities associated to the turbulence flow are described by laws of universal character. The main objection to this theory was given by Landau, who critized the universality of these laws arguing that an universal sta
Publicado em: 2006
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10. MAGNETOSTRICÇÃO E RUÍDO BARKHAUSEN EM AÇOS ELÉTRICOS DE GRÃO NÃO-ORIENTADO
Non-oriented electrical steels (NO) studied in this work are used in applications that demand isotropy of magnetic properties along the plane of the sheet, which the magnetic field is applied in different angles with respect to the rolling direction (RD). In magnetic materials as the steels, magnetic losses can be separated in two components: low induction l
Publicado em: 2005
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11. Análise dos Modos Ressonantes em Antenas de Microfita sobre Substratos Iso/Anisotrópicos por Técnicas da Ressonância Transversa
Neste trabalho, são utilizadas a Técnica da Ressonância Transversa (TRT) e a Técnica da Ressonância Transversa Modificada (MTRT), para a determinação das freqüências dos modos ressonantes de antenas de microfita com patch quadrado, retangular e circular e com substratos isotrópicos e anisotrópicos. Para isso, é proposto um modelo da cavidade equi
Publicado em: 2005
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12. Esqueletos 8-isotrópicos / x
Neste trabalho, dois novos algoritmos de esqueletização são apresentados. Um é seqüencial e o outro paralelo, ambos constituindo o mesmo processo de esqueletização que possui todas as propriedades desejáveis, inclusive a 8-isotropia. A isotropia é baseada em algumas propriedades originais dos subconjuntos abertos que são resultados de uma expansão
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2002