Eld Theory
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Aperfeiçoamentos no código computacional RAIOS incluindo aurilização / RAIOS computer code improvements including auralization
In this work, the most important improvements implemented in the computer code of numeric simulation of room acoustics, called RAIOS, are presented. These improvements are divided in four groups: Data importation process from DXF les; implementation of new acoustic quality parameters and steady state sound pressure level calculation; modications in order to
Publicado em: 2010
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2. Algumas peculiaridades da radiação associada a uma eletrodinâmica que viola a simetria de Lorentz / Peculiarities in the radiation from a Lorentz-violating electrodynamics
Nós discutimos uma teoria de campos efetiva em (3+1) dimensões incorporando violações da simetria de Lorentz. O modelo considerado é o Modelo Padrão Estendido (MPE), que incorpora violações da simetria de Lorentz indepedentes do observador mais geral possível. Uma breve revisão sobre este modelo é apresentada com particular ênfase no setor de cal
Publicado em: 2009
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3. Codimensões, cocaracteres, identidades e polinômios centrais Z$_2$-graduados da álgebra de Grassmann
Let E be the in_nite-dimensional Grassmann algebra over a _eld F of characteristic zero and consider L the F-vector space spanned by all generators of E. Let l be an automorphism of E of order 2 such that L is an homogeneous subspace. In this work, we study the Z2-gradings (E; l) induced by the automorphisms l and we _nd their Z2-graded codimensions and coch
Publicado em: 2008
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4. Suscetibilidades de carga e spin para uma superfície de fermi chata bidimensional
In this work we investigate the charge and spin instabilities of a two-dimensional model (d=2) of strongly interacting electrons in the presence of a at Fermi surface (FS) by using the renormalization group theory (RG). Bearing in mind the strong electronic repulsions in the cuprates superconductors, we try to relate our model to the repulsive Hubbard model
Publicado em: 2006
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5. Magnetotransport and Hall ferromagnetism in magnetic semiconductor heterostructures / Magneto-transporte e ferromagnetismo Hall em heteroestruturas semicondutoras magnéticas
Digital magnetic heterostructures (DMHs) are semiconductor structures with magnetic impurities (Mn) restricted to some planar arrangements (monolayers) regularly spaced. In the presence of an external magnetic field, the sp-d exchange interaction between the localized magnetic moments and the itinerant carriers is responsible for a giant spin splitting, of t
Publicado em: 2004
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6. Especificação do tipo intervalar parametrizado em CASL
The interval datatype applications in several areas is important to construct a interval type reusable, i.e., a interval constructor can be applied to any datatype and get intervals this datatype. Since the interval is, of certain form, a set of elements limited for two bounds, left and right, with a order notions, then its reasonable that interval construct
Publicado em: 2003