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Problemas inversos em física da atmosfera
(Universidade Federal de Santa Maria, 2005-04-08)
Techniques for estimating unknown terms - such as eddy diffusivity and counter-gradient - in atmospheric flow are presented in this study. The methos is also used to identify the source term in atmospheric pollution. The ...
Avaliação da função sócio-ambiental da Floresta Nacional de Canela (RS) como subsídio ao ecoturismo e educação ambiental
(Universidade Federal de Santa Maria, 2005-09-12)
A study was carried out in Canela, RS, including the application of instruments which evaluated the
characteristics of the receiving region, the tourist profile, Canela s National Forest evaluation by the
tourists the ...
Análise, projeto e desenvolvimento de sistemas multiníveis híbridos
(Universidade Federal de Santa Maria, 2005-03-21)
This Ph.D. Dissertation presents contributions to the study of hybrid multilevel systems, analyzing several issues that compose this system, such as: topological variations
of the output inverter stage and input rectifier ...
Desenvolvimento de métodos e algoritmos para avaliação e otimização da confiabilidade em redes de distribuição
(Universidade Federal de Santa Maria, 2005-06-17)
The distribution system is an extremely important part of the energy supply. At the same
time, distribution networks, most of them with radial configuration, are much more vulnerable
elements compared with transmission and ...
População de plantas e a ocorrência de moléstias no feijoeiro comum
(Universidade Federal de Santa Maria, 2005-01-26)
Tree experiments were conducted in Santa Maria end Constantina (State of Rio Grande do Sul- Brazil), objecting to determine the best plant population of type II e III of common bean grown in the season and latter season, ...
Técnicas para execução de experimentos sob ambiente protegido para a cultura da abobrinha italiana
(Universidade Federal de Santa Maria, 2005-07-01)
In order to determinate technicals to execution trials in protected environments for italian pumpkin was accomplished an experiment, from 18/08/2003 to 07/12/2003, in the area of the Department of Fitotecnia UFSM, in ...
Controladores discretos de tensão baseados no princípio do modelo interno aplicados a inversores trifásicos PWM
(Universidade Federal de Santa Maria, 2005-12-09)
This thesis contributes to the analysis, project and implementation of discrete-time controllers based on the Internal Model Principle, aiming to improve the performance of three-leg three-phase PWM inverters with insulating ...
Deterinação da biomassa e altura de amostragem para a quantificação de nutrientes em Acacia mearnsii De Wild
(Universidade Federal de Santa Maria, 2005-06-24)
The objective of this study was to quantify the biomass and to determine the optimal sampling point for nutrients quantification in four year old Acacia mearnsii trees. It was conducted in black wattle stand, located in ...
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 ...
Regime de irrigação e densidades de frutos na produção do melão hidropônico
(Universidade Federal de Santa Maria, 2005-02-03)
One of the factors that influence loss in productivity of melon crop is the inadequate irrigation system. Intervals between irrigations is one importante case determined,
especially in hidroponic systens. Two experiments ...