High Efficience
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Produção de vídeos caseiros pelos próprios alunos como estratégia para melhorar a aprendizagem dos conceitos abordados nas aulas regulares de Física no Ensino Médio e com ênfase no registro das atividades propostas
This work presents the results of a study about the efficience of home video productions by own students to get a better learning in Physics by the understanding of some important teachers assignments at Senior High School. The students were taught to elaborate the scripts, making off and other basic filming techniques, but the most important thing was to en
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/03/2012
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2. Tratamento de água para consumo humano de reservatório eutrofizado através de pré e interoxidação, adsorção em carvão ativado e dupla filtração / Drinking water treatment of eutrophic reservoir by pre and interoxidation, activated carbon adsorption and double filtration
Disordered basins occupation provoked acceleration of eutrophication, which besides purely aesthetic and landscaping problems, results in occurrence of high phytoplankton densities with potentially toxic cyanobacteria dominance. Alongside physical aging and consequent deterioration of installations, usual treatment technologies do not provide adequate condit
Publicado em: 2011
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3. Estudo de um sistema de limpeza de gases usando um lavador venturi de seção Circular
Venturi scrubbers are simples, low cost and highly applicable equipments. They are used in the industry as gas cleaners and in other to control the pollution. The objective of this work was to evaluate a gas cleaning system using Venturi scrubbers with circular section to remove particles off a gas flux. The tests were realized with 2,21 and 9,06 μm par
Publicado em: 2008
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4. Estudo de um sistema de limpeza de gases usando um lavador venturi de seÃÃo Circular
Venturi scrubbers are simples, low cost and highly applicable equipments. They are used in the industry as gas cleaners and in other to control the pollution. The objective of this work was to evaluate a gas cleaning system using Venturi scrubbers with circular section to remove particles off a gas flux. The tests were realized with 2,21 and 9,06 μm par
Publicado em: 2008
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5. A low voltage and high efficiency class D amplifier based on sima-delta modulator designed for hearing-aids applications / Amplificador de audio classe D baseado em modulação sigma-delta destinado a aparelhos auditivos
This thesis presents the design of a firstorder ?-? audioband power amplifier optimized for hearing aid (HA) amplification. The majority of HAs use a 1.1V battery and require very low current consumption to improve battery life. This work made use of amplifiers and comparators based on CMOS inverters because such an inverter, with a 1.1V battery, can operate
Publicado em: 2007
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6. Estudo de um sensor cromogênico aniônico fundamentado na competição entre uma merocianina e um ânion pelo calix[4]pirrol
This work has studied the assembly of a chromogenic sensor that uses as receptor calyx[4]pyrrole (CP), which is capable to recognize fluoride with high efficience, and two solvatochromic dyes, Brookers merocyanine (MB) and Reichardts dye (CR), as signalizing unity. The solutions of MB in acetonitrile, a low polarity medium, exhibit violet color. It was obser
Publicado em: 2007
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7. Ambiente de cultivo na propagaÃÃo in vitro de crisÃntemo (Dondranthema grandiflora Tzvelev cv. Rage): caracterÃsticas anatÃmicas e fisiolÃgicas / Environment of culture in the propagation in vitro of Dendranthema grandiflora cv. Rage: anatomical and physiological alterations.
Plant cultivated for the beauty of its flowers, chrysanthemum has great commercial value for being one of the most important ornamental cultures for plants market . Tissue culture has been used for that plant in commercial propagation. Becouse of high costs in traditional micropropagation tecnics, to the loss during the acclimatizing process and high eletric
Publicado em: 2006
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8. Fixing of holograms in Lithium Niobate / Fixação de hologramas em Niobato de Litio
In this work important contributions to the field and to the self stabilized holographic record in litium niobate were achieved and to the dynamic formation and hologram evolution study during different fixing stages. Other important contributions in this work refer to more efficient technique development and/or simpler ones to hologram fixing. On terms of s
Publicado em: 2005
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9. PROGRAMA DE INSPEÇÃO PARA PONTE ROLANTE BASEADO EM RISCO / DEVELOPMENT OF RISK-BASED INSPECTION PLANS FOR OVERHEAD CRANES
Traditionally, the transportation and elevation equipments assume a highlight position in the industry, being the overhead crane one of the mostly used equipments. As to the ThyssenKrupp Fundições Ltda, the overhead cranes are responsible for main causes for stopping of business, leading financial and operational lost. The use of RBI - Risk Based Inspectio
Publicado em: 2004
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10. Produção e caracterização parcial de um composto de baixa massa molecular com atividade fenoloxidasica, de Thermoascus aurantiacus
This work involves the phenoloxidase activity (POx) production by the thermophilic fungus Thermoascus auralltiacus. The best conditions for POx activity production in liquid culture were determined. The addition of lignocellulosic and polyssacharides substrates to culture induced high leveI POx activity. The best substrate was the wheat bran which induced be
Publicado em: 1995