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Itens para a visualização no momento 11-20 of 45
Estudo de propriedades estruturais, eletrônicas e magnéticas de clusters de Rh13, Pd13 E Pt13
(Universidade Federal de Santa Maria, 2009-08-11)
This work shows a theoretical study of Rh13, Pd13, and Pt13 clusters, using first principles methods. We sought to understand aspects of stability and magnetic moment for these systems. The employed methodology was tested ...
Classificação espectral e determinação de distância de estrelas em dez regiões HII do hemisfério sul
(Universidade Federal de Santa Maria, 2009-03-11)
In order to determine distances of Southern Galactic HII regions, we carried out spectroscopic and photometric observations of the stellar content of a set of these objects. We have chosen objects only visible in the South ...
Estudo teórico do comportamento magnético do composto Y0.8Gd0.2Co3
(Universidade Federal de Santa Maria, 2004-06-08)
The itinerant ferromagnetic Y Co3, Tc = 301K, presents a crystalline structure with a hexagonal unit cell. It has thirty six atoms that are distributed in five different crystallographic sites, three for the Co and two for ...
Magnetostricção e ruído Barkhausen em aços elétricos de grão não-orientado
(Universidade Federal de Santa Maria, 2005-12-20)
Non-oriented electrical steels (NO) studied in this work are used in applications that demand isotropy of magnetic properties along the plane of the sheet, which the magnetic field is applied in different angles with respect ...
Magnetoimpedância em Filmes Finemet/Metal/Finemet
(Universidade Federal de Santa Maria, 2004-10-01)
The magnetoimpedance effect (MI) in sandwiched thin films of the FeCuNbSiB/Cu produced by Magnetron Sputtering is studied using HP4396B impedance analyzer in the
frequency range 100kHz-1,8GHz. The samples were produced ...
Diferentes técnicas de condicionamento em séries temporais turbulentas
(Universidade Federal de Santa Maria, 2005-12-09)
The dynamics process of the atmosphere near Earth ground is controled by two main forcings, termical and machanics. These process are reponsible for the atmospheric flow variability in this layer, and this variability ...
Magnetoimpedância como ferramenta para a caracterização magnética de microfios amorfos
(Universidade Federal de Santa Maria, 2006-09-22)
The possibility of exploring the magnetic properties of amorphous microwires in technological applications has attracted the attention of the scientific community in the last years. Beyond, the magnetoimpedance effect has ...
Comparação dos fluxos turbulentos em diferentes condições de estabilidade e topografia
(Universidade Federal de Santa Maria, 2004-05-04)
In this study sensible and latent heat fluxes as well as momentum flux were analysed in terms of similarity parameters. The intensity of the turbulence and the correlation functions are also studied. The data used in ...
Decaimento da turbulência na camada superficial
(Universidade Federal de Santa Maria, 2005-04-27)
This dissertation presents a study of the atmospheric turbulence decay on the surface layer during the evening transition. This is done through the analysis of the spectral densities temporal evolutions of the three wind ...
Caos na camada limite atmosférica noturna
(Universidade Federal de Santa Maria, 2009-04-08)
A three-equation model, based on prognostic expressions for the Richardson number, turbulent kinetic energy and wind shear is proposed to represent turbulent behavior in the nocturnal boundary layer (NBL). Integration ...