Polarization Anisotropy
Mostrando 1-12 de 50 artigos, teses e dissertações.
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1. Properties of NGO 3% Silicon Steel Asymmetrically Cold Rolled
The effects of asymmetric and conventional deformations and annealing on the microstructure of non-grain-oriented (NGO) 3 wt% silicon steel were analyzed by x-ray diffraction, optical microscopy and magnetometry. The results suggest that pure asymmetric rolling tends to lessen magnetic losses. However, intermediate annealing resulted in lower planar anisotro
Mat. Res.. Publicado em: 23/10/2015
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2. Aplicação da técnica de elipsometria de emissão para caracterização de materiais luminescentes
In this work we demonstrated the potential of the emission ellipsometry in the scope of the Stokes theory for electromagnetic field to the photophysics study of luminescent materials, in addition we introduce a new methodology using an achromatic quarter-wave plate. Moreover, the use of linearly polarized light allowed "selectively" the study of various phot
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/02/2012
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3. 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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4. Frações da matéria orgânica e composição molecular de substâncias húmicas de solos sob cultivo de eucalipto em biomas distintos / Organic matter fractions and humic substance molecular composition from soils under eucalypt cultivation in distinct biomes
O eucalipto é uma essência florestal de rápido crescimento que durante o ciclo e após a colheita aporta ao solo grande massa de resíduos, os quais podem contribuir para a formação da matéria orgânica do solo (MOS). A presente tese teve como objetivos gerais: i) avaliar o impacto do cultivo do eucalipto nas frações da MOS em solos de texturas disti
Publicado em: 2009
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5. Multicamadas magnéticas de telureto de európio e semicondutores iv-vi crescidas por epitaxia de feixe molecular / Magnetic multilayers of europium telluride and IV-VI semiconductors grown by molecular beam epitaxy
In this work, thin EuTe films and EuTe/PbTe(SnTe) superlattices were grown, and their structural and magnetic properties were characterized. The molecular beam epitaxial growth parameters of the samples were optimized, particularly those of the EuTe/SnTe SLs. To this goal, the growth modes of EuTe on SnTe and vice versa were investigated, and the influence o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/10/2008
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6. Microwave study of trap and precipitation of electrons in solar burst / Estudo em microondas do aprisionamento e precipitação de elétrons em explosões solares
We have studied the process of particle number density evolution during solar flares from the microwave emission point of view. In order to do this, we have used the database of Nobeyama Radio Observatory (NRO), with approximately 100 events that occurred between 1998 and 2000 that were observed in seven frequencies (1, 2, 3.8, 9.4, 17, 35, and 80 GHz), in t
Publicado em: 2003
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7. Kinetics and molecular dynamics of the dispersion process in two-dimensional systems, flow injection (FI): construction and validation of an experimental apparatus. / Cinética e dinâmica molecular do processo de dispersão bidimensional em sistemas de injeção em fluxo (FI):construção e validação de um aparato experimental.
Este trabalho é constituído de três etapas, a saber: planejamento e construção de um aparato experimental para medidas de fluorescência total (LIF) e depolarização fluorescente (PLF) em sistema de injeção em fluxo (FI); testes operacionais visando otimizar parâmetros experimentais; avaliação fotoquímica/fotofísica da cinética e dinâmica mole
Publicado em: 2002
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8. Propriedades Ópticas de Semicondutores Orgânicos à Base de Polímeros Emissores de Luz / Optical proprieties of organic semiconductors based on light emitting polymers.
In this work, we studied the optical proprieties of absorption and emission of luminescent conjugated polymers based on poly(p-phenylene vinylene) (PPV). This material was processed in thin films by casting, spin-coating, self-assembled (SA) e Langmuir-Blodgett (LB) techniques, available in the Grupo de Polímeros Bernhard Gross, where the samples were chara
Publicado em: 2001
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9. Estudo sísmico no açude Tucunduba, Senador Sá, CE
The Tucunduba Dam, is west of Fortaleza, Ceará State. The seismic monitoring of the area, with an analogical station and seven digital stations, had beginning on June 11, 1997. The digital stations, operated from June to November 1997. The data collected in the period of digital monitoring was analyzed for determination of hypocenters, focal mechanisms, and
Publicado em: 1999
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10. Crescimento e caracterização de pontos quânticos naturais de InAs e In0.5Ga0.5As sobre diferentes orientações cristalográficas do substrato de GaAs. / Characterization of InAs and In0.5Ga0.5As self-assembled quantum dots grown on different crystallographic orientations of GaAs substrate.
Self-assembled or self-organized quantum dots (QDs) of InAs and In0.5Ga0.5As were produced on different crystallographic oriented GaAs substrates using Molecular Beam Epitaxy. During the growth process the dots were characterized in situ by means of Reflection High-Energy Electron Diffraction (RHEED). The features of RHEED pattern allowed the determination o
Publicado em: 1998
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11. Fração histonica nuclear rica em histona H5 : isolamento, caracterização, orientação macromolecular e interação com DNA
This thesis deals with structural aspects of an H IND. 5 histone rich fraction ( H IND. 5 RF), as well as its importance in the chromatin structure. H IND. 5 RF was extracted from chicken erythrocyte nuclei. Some intrinsic characteristics of H IND. 5 RF a few differenciating qualities in relation to the H IND. 1 histone of the calf thymus were determined by
Publicado em: 1983
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12. Theory of light quenching: effects of fluorescence polarization, intensity, and anisotropy decays.
Experimental studies have recently demonstrated that fluorescence emission can be quenched by laser light pulses from modern high repetition rate lasers, a phenomenon we call "light quenching." We now describe the theory of light quenching and some of its effects on the steady-state and time-resolved intensity and anisotropy decays of fluorophores. Light que