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Teoria de campo médio com clusters correlacionados aplicada ao modelo de Ising antiferromagnético
(Universidade Federal de Santa Maria, 2014-01-16)
The correlated cluster mean-field theory is an approximative method that has presented good accuracy and low computational cost results when applied to ferromagnetic systems. However, due to its recent publication, the ...
Aspectos dimensionais da massa do fóton na eletrodinâmica quântica
(Universidade Federal de Santa Maria, 2014-12-10)
The gauge invariance of Quantum Electrodynamics establishes a non massive character for the photon field. Nevertheless, corrections at one loop level for the self-energy of the photon can induce mass generation in some ...
Estudo da atividade solar no passado em função da radiação cósmica
(Universidade Federal de Santa Maria, 2014-03-20)
The study about cosmic radiation arriving the Earth represents an important register of its variations, as the physical phenomena who cause these variations. In the solar system the variation is strongly modulated by the ...
Modelo para turbulência na camada limite atmosférica noturna utilizando equações prognósticas para a energia cinética turbulenta e fluxo de energia na forma de calor sensível
(Universidade Federal de Santa Maria, 2014-01-16)
The determination of the turbulent fluxes in very stable conditions is done, generally, through parametrizations. In this work the turbulent fluxes are estimated, by using a simplified model, through prognostic equations ...
Magnetoimpedância em multicamadas de Ni81Fe19/Ir50Mn50
(Universidade Federal de Santa Maria, 2014-01-16)