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Itens para a visualização no momento 11-20 of 21
Efeito hall extraordinário em multicamadas granulares de SiO2/Co/CoO com exchange bias
(Universidade Federal de Santa Maria, 2012-07-27)
Granular magnetic systems can be composed by magnetic particles or clusters with size of some
nanometers. These magnetic nanoparticles present different magnetic order phases, as superparamagnetic,
and they can be embedded ...
Algoritmo genético acoplado a um método multi-grid e a teoria dos grafos para determinação da estrutura de equilíbrio de aglomerados atômicos
(Universidade Federal de Santa Maria, 2012-12-14)
In this work we present a proposal to improve Genetic Algorithm method by coupling
it to the techniques of discretization of the configurational space via the multi-grid
methodology, and by employing a topological selection ...
Congelamento inverso em um modelo de vidro de spin fermiônico
(Universidade Federal de Santa Maria, 2012-10-03)
The present work studies the counterintuitive phenomenon of inverse transitions (IT). The
IT are a class of phase transitions (reversible) in which the ordered phase appears at higher
temperatures than the disordered ...
Descrição Booleana para eventos celulares: construção de redes, topologia e análise dinâmica
(Universidade Federal de Santa Maria, 2012-01-13)
This work presents a methodology to describe the dynamics
and topology of biological regulatory networks through the application of graph
theory. We model these networks using Boolean rules and simulations performed
with ...
Sazonalidade da concentração de CO2 atmosférico em uma área agrícola no RS
(Universidade Federal de Santa Maria, 2012-01-31)
In this work an agricultural area in Cruz Alta/RS was used to evaluate the seasonality of CO2
concentration with respect to meteorological variables of temperature, global radiation and
rainfall. The study period was ...
Indução de um eixo fácil de magnetização utilizando máscaras de sombreamento em filmes finos de CoFeB
(Universidade Federal de Santa Maria, 2012-01-30)
CoFeB thin films were produced using the technique of magnetronsputtering. Six
samples were produced magnetic thin films with two different thicknesses, using
different settings for shading masks. For each film were made ...
Balanço de água no ciclo da cultura de soja: representação no modelo de vegetação dinâmica Agro-IBIS
(Universidade Federal de Santa Maria, 2012-07-17)
Exchanges of water in the soil-plant-atmosphere are controlled by physical-hydric soils, which in turn are highly variable in space and very sensitive to the use and soil management, especially in an agroecosystem. ...
Propriedades eletrônicas e estruturais de nanoestruturas de carbono funcionalizadas para aplicação em sensores
(Universidade Federal de Santa Maria, 2012-01-12)
This work presents a study of properties of functionalized carbon nanotubes
and graphene nanoribbons. We studied, by first principles simulations, the structural
and electronic properties of functionalized nanotubes and ...
Estudo multibanda do conteúdo estelar de regiões HII do Hemisfério Sul
(Universidade Federal de Santa Maria, 2012-10-29)
We present a multi-wavelength study of the stellar content of 11 optical/infrared Southern
Galactic Hii regions with 10 h < α(J2000) < −17 h and −65° < δ(J2000) < −35°.
Nine optical objects with no published or uncertain ...
Propriedades estruturais e eletrônicas de partículas de 13 e 55 átomos de metais de transição
(Universidade Federal de Santa Maria, 2012-06-01)
In this thesis we performed a theoretical study of the structural, electronic, and magnetic properties of transition metal (TM) particles using two models, with 13 and 55 atoms to describe clusters, nanoparticles (NPs), ...