Maxwell Model
Mostrando 13-24 de 65 artigos, teses e dissertações.
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13. Modeling of electromagnetic waves propagation in four-level two-electron atomic systems governed by Pauli Exclusion Principle using the TLM method
This paper presents a computational model of electrons dynamics and gain in four-level two-electron atomic systems. These systems, submitted to an electromagnetic wave, are governed by Pauli Exclusion Principle and they are modeled using the Time-Domain Transmission Line Matrix (TLM) method with the symmetrical condensed node (SCN) with novel voltage sources
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2012-06
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14. Dynamic and steady: shear rheological properties of xanthan and guar gums dispersed in yellow passion fruit pulp (Passiflora edulis f. flavicarpa)
Yellow passion fruit pulp is unstable, presenting phase separation that can be avoided by the addition of hydrocolloids. For this purpose, xanthan and guar gum [0.3, 0.7 and 1.0% (w/w)] were added to yellow passion fruit pulp and the changes in the dynamic and steady - shear rheological behavior evaluated. Xanthan dispersions showed a more pronounced pseudop
Brazilian Journal of Chemical Engineering. Publicado em: 2011-09
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15. Estudo das ressonâncias de plasmon em filmes silicatos com nanopartículas de Ag interagentes
In this work, the behavior of surface plasmon resonance from layers of silver nanoparticles embedded in silicon dioxide or on surfaces of silicon dioxide was studied. Structural properties of the produced films were characterized by transmission electron microscopy, while the optical properties were studied with a spectrophotometer. Results showed average na
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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16. Algumas contribuições ao estudo do modelo padrão estendido: radiação CPT-Par confinada a guias de ondas / Some contributions to standard model extended: CPT-Even electrodynamics in waveguides
A escala de Planck, um regime de altíssimas energias, constitui-se um domínio ainda muito distante da tecnologia nos dias de hoje. Uma questão de interesse é saber se a simetria de Lorentz continua válida nesta escala de energia. Tal investigação pode ajudar na construção de novas teorias que buscam unificar Gravitação (Relatividade Geral) e Mecâ
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/02/2010
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17. 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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18. Espalhamento de Férmions sob Influencia da Violação de Lorentz no Setor Fotônico / Scattering of Fermions under Influence of Violation Lorentz Sector Photonic
The standard model extension is a theoretical framework which includes the possibility of Lorentz symmetry violation in the Standard Model of elementary interactions. In electrodynamics, this possibility is represented by the term, KμFμF, that violates Lorentz symmetry without jeopardizing CPT symmetry, and the term "μvAμ@A, which violate
Publicado em: 2010
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19. Propagação não linear de pulsos em estruturas 1D com band gap fotonico / Nonlinear pulse propagation in one-dimensional photonic band gap structures
The interaction of ultrashort optical pulses with photonic band gap materials has been studied by considering light propagation through one-dimensional photonic band gap structures, composed of a periodic multilayer stack of dielectric materials whose unitary cell consists of a pair of layers with different refractive indices n1and n2, respectively. One of t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2009
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20. Classic aspects of Maxwell electrodynamics supplemented by the CPT-par sector of the Standard Model gauge Extended / Aspectos Clássicos da eletrodinâmica de Maxwell suplementada pelo termo CPT-par do setor de gauge do Modelo Padrão Estendido
A possibilidade de violação espontanea da simetria de Lorentz no contexto da teoria das cordas surgiu nos anos 90 como um elemento capaz de direcionar novos caminhos para a fısica na escala de Planck. Possıveis violações da invariãncia de Lorentz são vistas como uma caracterıstica da fısica além do Modelo Padrão usual, que proíbe
Publicado em: 2009
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21. Thermodynamic properties of the field electromagnetic field in the CPT-odd standard extended / Propriedades termodinâmicas do campo eletromagnético no setor CPT-ımpar do modelo padrão estendido
In this work we study the effects of the spontaneous breaking of Lorentz symmetry on black body radiation phenomenon in the context of the Maxwell-Caroll-Field-Jackiw (MCFJ) model. The MCFJ model is the electromagnetic CPT-odd sector of the standard model extension and, it presents for a purely space-like background a positive-definite hamiltonian. Firstly,
Publicado em: 2009
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22. Simulation of dense colloids
We present in this proceeding recent large scale simulations of dense colloids. On one hand we simulate model clay consisting of nanometric aluminum oxyde spheres in water using realistic effective electrostatic interactions and Van der Waals attractions, known as DLVO potentials and a combination of molecular dynamics (MD) and stochastic rotation dynamics (
Brazilian Journal of Physics. Publicado em: 2008-03
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23. Estudo da consistência e soluções clássicas da eletrodinâmica de Maxwell-Carroll-Field- Jackiw-Proca / Study of the consistency and classic solutions of the electrodynamics of Maxwell-Carroll-Field- Jackiw-Proca
Neste trabalho, objetiva-se investigar signi cativos aspectos da eletrodinâmica de Maxwell-Carroll-Field-Jackiw-Proca (MCFJP). Esta eletrodinâmica é construída via a implementação de campos de fundo (backgrounds), responsáveis pela violação da invar- iância de Lorentz, no setor de gauge puro do Modelo Padrão usual. Primeiramente, averigua-se
Publicado em: 2008
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24. Equations LORENZ IN CROSS-FERROHIDRODINÂMICA / EQUAÇÕES DE LORENZ-CROSS NA FERROHIDRODINÂMICA
In this work we investigated the problem of Rayleigh-Bénard for a magnetic binary fluid, i.e., a magnetic fluid, which consist of magnetic nanopartilces stably dispersed in a liquid carrier. The theoretical calculations were performed based on a Lorenz-like model, which transforms a system of partial differential equations into ordinary differential ones. T
Publicado em: 2008