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Itens para a visualização no momento 31-40 of 134
Avaliação dos procedimentos para determinação de teor de ligante e granulometria em concretos asfálticos de diferentes faixas granulométricas e origens mineralógicas
(Universidade Federal de Santa Maria, 2017-07-13)
The verification of binder content and granulometry of asphalt mixtures are of great importance in the
technological control of the construction process. These ensure a good performance of the pavement
in its useful life. ...
Conversor eletrônico de alto fator de potência para alimentação de leds aplicando a técnica input current shaper
(Universidade Federal de Santa Maria, 2017-07-31)
This work presents analysis, simulation, design and implementation of an integrated topology consisting of two static DC-DC converters to supply power LEDs, presenting high power factor. Power factor correction is essential ...
Planejamento da expansão de sistemas elétricos de distribuição considerando a tarifação da transmissão e aspectos de confiabilidade
(Universidade Federal de Santa Maria, 2017-05-26)
The main premise for the countries that have adopted the competition model to generation and
energy market is the decentralization of activities of the generation, transmission and distribution
of energy. In this structure, ...
Transesterificação de óleo de soja com carbonato de dimetila catalisada por metóxido de potássio
(Universidade Federal de Santa Maria, 2017-08-04)
World biodiesel production is growing up every year mainly due to government policies that
require its consumption. However, biodiesel self-cost still makes it uncompetitive compared
to petrodiesel, and one of the reasons ...
Avaliação do desempenho à estanqueidade à água de diferentes revestimentos para a recuperação de uma fachada degradada
(Universidade Federal de Santa Maria, 2017-12-13)
One of the main factors responsible for the degradation of façades is the humidity, causing the
appearance of pathological manifestations and shortening the useful life of the coating. In this
way, it becomes necessary ...
Avaliação reológica do período de consolidação de argamassas colantes
(Universidade Federal de Santa Maria, 2017-11-27)
This work has presented an analysis of the consolidation process of dry set mortars, using the oscillatory rheometry technique as a method of approach. The method was applied to a set of mortar mixtures, whose proportions ...
Substituição do aço inoxidável em uma coluna de destilação por material polimérico de menor custo
(Universidade Federal de Santa Maria, 2017-08-28)
The ethanol production in small scale, with maximum capacity of 5.000 l/day, deals with serious problems related to low process performance, due to the low extraction of raw material, inefficiency of ethanol separation ...
Otimização do armazenamento e geração de energia a biogás visando ao gerenciamento das redes de distribuição
(Universidade Federal de Santa Maria, 2017-08-18)
The increasing use of renewable sources of distributed generation (DG) and also the perspective
of the use of energy storage systems (ESS) in distribution systems, makes it imperative that
distributors adopt measures to ...
Monitoramento remoto e seguro do campo magnético em linhas de transmissão de alta tensão
(Universidade Federal de Santa Maria, 2017-04-17)
Magnetic and electric field levels monitoring in overhead transmission lines (TL) of power
plants and substations (SEs) has been established by Brazilian Resolution 616/2014. It was
observed in procedures to carry out ...
Metodologia para análise da estabilidade angular em sistemas de distribuição com geração distribuída
(Universidade Federal de Santa Maria, 2017-08-25)
The transient stability in distribution systems has received special interest due to the continuous increase of the distributed generation connected to the network. Besides the dynamic behavior of the generation system, ...