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Comparação de métodos via solo e via demanda evaporativa para manejo de irrigação da cultura da soja safrinha
(Universidade Federal de Santa Maria, 2014-08-25)
Irrigation must function adequately meet the water demands of crops so that they express their full productive potential. However, there are variations with the soil-plant-atmosphere relationship, interfering to determine ...
Estimativa dos parâmetros da resistência do solo ao cisalhamento através de pedotransferência
(Universidade Federal de Santa Maria, 2014-07-11)
The growing world population requires a higher demand for food and one of the
techniques to meet this demand is irrigation. One of the best alternatives for the
storage of water for use in irrigation are earth dams. The ...
Desempenho de mecanismos sulcadores de semeadora-adubadora sobre os atributos físicos do solo em várzea no comportamento da cultura da soja (Glycine Max L).
(Universidade Federal de Santa Maria, 2014-08-15)
Soybeans are very beneficial in rotation to rice in lowland areas, but one of the limiting factors on the crop in lowland areas is the soil compaction. The objective of this study was to evaluate the effect of furrow ...
Ciclagem biogeoquímica de nutrientes em Eucalyptus dunnii Maiden em uma microbacia hidrográfica experimental do bioma Pampa
(Universidade Federal de Santa Maria, 2014-09-04)
The planting of large areas with exotic species is a consequence of the evolution of an
entire industrial structure; it aims to meet the demand for forest products. The use of
these species requires knowledge on the ...
Arquitetura e alometria de espécies arbóreas em uma floresta estacional subtropical
(Universidade Federal de Santa Maria, 2014-01-22)
The aim of this study was to describe some architectural models and study their behavior in
vegetation structure, allometric patterns and their growth dynamics to support management
activities and conservation of tree ...
Materiais e técnicas para nanoestruturas magnetoelétricas compósitas
(Universidade Federal de Santa Maria, 2014-12-19)
Hybrid nanostructures which integrate two or more technologically interesting physical properties are
fundamental for developing new generations of electronic devices. Exhibiting at least two coupled ferroic orders,
multiferroics ...
Estudo de primeiros princípios da estabilidade e funcionalização da superfície e nanofitas de carbeto de silício
(Universidade Federal de Santa Maria, 2014-10-24)
We use first principles calculations based upon the density functional theory to
investigate the stability, geometry, electronic and magnetic properties of cibic silicon
carbide (SiC) surfaces aligned along the (001) ...
Estudo da anisotropia unidirecional e da histerese rotacional em sistemas com exchange bias
(Universidade Federal de Santa Maria, 2014-08-18)
The exchange bias (EB) phenomen occurs due to the coupling between ferromagnetic and
antiferromagnetic material and the main characteristics are the rise of unidirectional anisotropy
and the rotational hysteresis in torque ...
Simulação ab initio de nanotubos de carbono funcionalizados via adsorção e deformação estrutural
(Universidade Federal de Santa Maria, 2014-08-29)
In this thesis the behavior of functionalized carbon nanotubes via chemical and physical
adsorption and estrural deformation is studied through ab initio calculations based
on the DFT formalism, using the SIESTA program. ...
Cálculos de primeiros princípios em isolantes topológicos: HgTe/CdTe
(Universidade Federal de Santa Maria, 2014-12-15)
The observation of the quantum spin Hall effect in the HgTe/CdTe heterostructure triggered
the study of materials exhibiting a spin polarized electronic current at their surfaces/
interfaces. These states are topologically ...