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Itens para a visualização no momento 231-240 of 304
Adsorventes compostos de ferro, alumínio e lantânio: síntese, caracterização e aplicação na remoção de fluoretos
(Universidade Federal de Santa Maria, 2022-11-11)
The use of groundwater to obtain water for human consumption is an alternative for places where there is no nearby surface spring available, or where there is no water treated by concessionaires being distributed to ...
Produção de biodiesel a partir de matéria-prima com alto teor de acidez: modelagem cinética e termodinâmica, simulação e otimização
(Universidade Federal de Santa Maria, 2022-08-25)
This work proposes to investigate the methyl esters production through the transesterification reaction of oleic acid with methyl acetate catalyzed by niobium phosphate. For the autogenous batch reaction system, at high ...
Análise do necropercolado em diferentes meios hidrogeológicos ocupados por cemitérios
(Universidade Federal de Santa Maria, 2022-10-26)
Even after death, human beings continue to generate contaminants in the form of necroleachate,
which may contain heavy metals and a series of other contaminants, altering the natural
characteristics of water and soil. ...
Influência da irregularidade longitudinal de pavimentos na perda de carga no transporte de soja e nos demais custos operacionais
(Universidade Federal de Santa Maria, 2022-12-19)
Brazil is one of the world's largest producers of grains, but its main producing regions
are far from ports and consumer centers. This generates a high demand for
transportation, supplied mostly by the use of commercial ...
Princípio de integração de circuitos de auxílio à comutação: o estudo do caso ZVT
(Universidade Federal de Santa Maria, 2007-12-10)
The main contribution of this Thesis is the proposition of the integration concept of auxiliary commutation circuits applied to systems with several power conversion stages. Trough this concept, the reactive energy resulting ...
Algoritmos heurísticos de otimização da proteção e manobra em redes de distribuição de energia
(Universidade Federal de Santa Maria, 2008-07-29)
The new regulations of the electricity sector have requested from the power utilities great performance
efficiency on their distribution systems, requiring more rigorous quality and continuity energy levels. In Brazil,
the ...
Desenvolvimento de uma família de reatores eletrônicos para lâmpadas de multivapor metálico empregando a técnica de conexão diferencial de conversores CC/CC
(Universidade Federal de Santa Maria, 2009-02-25)
This work presents and analyzes a new family of electronic ballasts to supply metal halide lamps applied to interior lighting systems. These lamps present the best light quality among the high intensity discharge lamps, ...
Modelos de aprendizado de máquina interpretáveis aplicados na predição da separação e purificação de frutooligosacarídeos
(Universidade Federal de Santa Maria, 2023-02-16)
Fructooligosaccharides separation and purification are crucial for industrial applications where such methods are critically needed. However, some specific characteristics of the process can affect the selectivity of the ...
Desenvolvimento de materiais carbonáceos a partir de subprodutos do processamento de butiá (Butia spp.) e aplicação como adsorventes de fenol e CO2
(Universidade Federal de Santa Maria, 2023-03-09)
Waste generation and environmental pollution contention are challenges to modern society.
Liquid effluents pollute water sources and gaseous can aggravate the greenhouse effect.
Adsorption highlights among the technologies ...
Contribuição ao controle de máquinas de vibração eletrodinâmicas
(Universidade Federal de Santa Maria, 2009-03-20)
This work presents contributions to the sinusoidal acceleration control of electrodynamic shakers applied in vibration testing. Considering the importance of sine tests to identify critical frequencies of operation and to ...