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Itens para a visualização no momento 21-30 of 126
Transicões inversas em modelos fermiônicos de vidro de spin
(Universidade Federal de Santa Maria, 2010-08-26)
The present work studies inverse transitions by using two spin glass models: the infinite-range fermionic Ising spin glass (FISG) in the presence of a transverse magnetic field
¡ and Hopfield fermionic Ising spin glass ...
Espectros de turbulência em terreno complexo
(Universidade Federal de Santa Maria, 2008-08-20)
Throughout this paper a spectral analysis is conducted on the superficial limit layer in complex terrains. The data used were collected in the central part of the state of Rio Grande
do Sul, in the Valley of Jacuí River. ...
Características estatísticas turbulentas associadas ao fenômeno do vento norte no sul do Brasil: aplicação ao problema da difusão de contaminantes
(Universidade Federal de Santa Maria, 2008-04-18)
A parameterization for the transport processes in a shear driven planetary boundary layer (PBL) has been established, employing turbulent statistical quantities measured during the north wind phenomenon in southern Brazil. ...
Modelo espectral de heisenberg aplicado ao decaímento da turbulência na camada residual
(Universidade Federal de Santa Maria, 2005-10-22)
In the study of the dispersion of contaminants in the atmosphere by computational simulations, the Eulerian approach, based in the diffusionadvection equation, is largely employed. In these simulations, concentration values ...
Transporte térmico em nanofitas de grafeno dopadas com N, B e SI
(Universidade Federal de Santa Maria, 2017-08-28)
The recent progress of the research on carbon nanostructures and the issue of
thermal management have established a great demand in relation to the scientific understanding
of thermal transport in these nanomaterials. ...
Exchange bias em bicamadas de NiFe/FeMn: um estudo em função da espessura da camada antiferromagnética
(Universidade Federal de Santa Maria, 2018-12-04)
The exchange bias (EB) arises, generally, from the interfacial coupling between a ferromagnetic
layer (FM) and an antiferromagnetic layer (AFM). The most well-known manifestations
of this phenomenon, in samples with a ...
Utilização de algoritmo genético para a determinação da estabilidade de aglomerados atômicos e as aplicações destes com grafeno
(Universidade Federal de Santa Maria, 2017-01-31)
In this thesis we propose a improvement of the Genetic Algorithm (GA) method that is used to
search the stability of geometry of atomic clusters. The proposed improvements consist by introducing
two new operators: the ...
Estudo de populações estelares em galáxias ativas a partir de cubos de dados no infravermelho próximo
(Universidade Federal de Santa Maria, 2017-08-30)
The correct characterization of the spectral energy distribution (SED) components in Active Galactic
Nuclei (AGN) is the key for their understanding and their role in the evolution of the host
galaxies. In the near-infrared ...
A emissão do gás da região de linhas estreitas em galáxias Seyfert próximas
(Universidade Federal de Santa Maria, 2017-12-21)
The Active Galactic Nuclei (AGNs) show high luminosities ( 109 L ) and emit energy from
the accretion disk around the central Supermassive Black Hole (SMBH). The Narrow Line
Region (NLR) is the only AGN structure spatially ...
Estudo computacional da eletroporação de membranas lipídicas
(Universidade Federal de Santa Maria, 2016-08-03)
In this work we present a computational study of the electroporation process of lipid
membranes in the presence of water. First, we developed an investigation of the
formation of pores through simulations based on classical ...