Atmospheric Control
Mostrando 25-36 de 138 artigos, teses e dissertações.
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25. Effect of Dielectric Barrier Discharge on the Airflow Around a Cylinder
Abstract: Fluids in a dielectric barrier glow discharge at atmospheric pressure have attracted interest from communities of thermo and fluid dynamics, as well as control. This work investigated the effects of a plasma actuator, operating at 8.0 kV and 4.4 kHz, on the pressure distribution around a polyvinyl chloride circular cylinder in low-velocity airflow.
J. Aerosp. Technol. Manag.. Publicado em: 2012-12
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26. Abordagem sistêmica aplicada aos complexos agroindustriais da soja e do algodão no território do extremo oeste da Bahia / Systemic approach applied to agrobusiness complexes of soy and cotton in the territory of the extreme West of Bahia
The present study focues to analyse the changes of geosystem of western of Bahia in consequence of anthropic action, since innovative inputs from system by introduction of soya and cotton crops. In order to understand the new spatial organization of Barreiras, Correntina, Luís Eduardo Magalhães e São Desidério Citys, since 1970. The quantitative paramete
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/12/2011
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27. Medição do aporte atmosférico dos elementos-traço nos municípios de Campinas e Paulínia com auxílio da espécie vegetal Tillanásia usneoides (L.) / Measurement of atmospheric supply of trace elements in Campinas and Paulínia with support of vegetal specie Tillandsia usneoides (L.)
The epiphytic bromeliad Tillandsia usneoides (L.) was used as biomonitor of the atmosphere at seven sites along a transect of the municipalities of Campinas and Paulinia. The selected sites are located near highways, industries and avenues, as well as in places farther away from human activities. The samples of were introduced by about two months during five
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 21/06/2011
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28. Desenvolvimento de um sistema para detecção de dispersóides no ar
The amount of dust suspended in air can be harmful to human health if not complied with the limits previously established by the WHO (World Health Organisation). The air is polluted when it contains elements foreign to its natural composition: oxygen, nitrogen, noble gases and water vapor and even carbon dioxide. The most common forms of air pollution are ca
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/04/2011
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29. Avaliação do efeito de gases poluentes na corrosão metálica: um experimento para o ensino da corrosão
In this work one proposes a didactic experience to simulate atmospheric corrosion of copper and nickel, due to sulfur dioxide presence. This is an opportunity to understand some basic aspects of atmospheric corrosion, by using fundamental concepts in chemistry, reactions of extraction and characterization of pollutants, as well as their participation in corr
Química Nova. Publicado em: 2011
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30. Impacto do aumento da concentração de CO2 atmosférico sobre a ferrugem asiática e o desenvolvimento de plantas de soja.
Resumo: A concentração de dióxido de carbono (CO2) na atmosfera tem aumentado significativamente nas últimas décadas e as previsões indicam que os valores atuais podem dobrar até o final do século. O presente estudo teve por objetivo avaliar o efeito do aumento da concentração de CO2 atmosférico na severidade da ferrugem asiática da soja, causada
Jaguariúna: Embrapa meio Ambiente. Publicado em: 2011
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31. Alteração do controle de vazão de bombeio de rotação constante para rotação variável e impacto nas emissões atmosféricas em uma refinaria de petróleo / Alteration of the control of flow of i pump of constant rotation for variable rotation and impact in the atmospheric emissions in a refinery of petroleum
Este trabalho avalia o ganho ambiental relativo à redução de emissões atmosféricas que pode ser obtido através da substituição do modo de controle de vazão de um sistema de bombeamento de corrente de hidrocarbonetos da refinaria Alberto Pasqualini REFAP S/A, no município de Canoas, RS. Atualmente o controle de vazão desse fluido é efetuado por v�
Publicado em: 2011
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32. Medidas da emissão de poluentes e da eficiência na combustão assistida do glicerol residual de biodiesel. / Measurements of emissions and fuel efficiency of the assisted residual glycerol biodiesel.
With increased global production of biofuels in particular biodiesel, an excess of glycerol is being generated worldwide. This has caused a sharp drop in the price of this compound in the world market. Much thought has been given to a destination for this residue, since no one can lay it in the environment and one of the alternatives be to use would its calo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/11/2010
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33. Poluição veicular: Avaliação dos impactos e benefícios ambientais com a renovação da frota veicular leve na cidade de São Paulo / Vehicle pollution: Analysis of the impacts and environmental benefits concerning the replacement of light vehicles in São Paulo City
This study presents an analysis of the levels of vehicles emissions related to the pollution problems in São Paulo City. Using a methodology called bottom-up, this thesis presents a theoretical evaluation on the rates of pollutants coming out the exhaust pipe of the largest light vehicles fleet in Brazil. Issues related to daily city activities such as the
Publicado em: 2010
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34. Genotoxicidade e composição do material particulado emitido pela queima de Biomassa: um estudo de caso em Tangará da Serra, Região da Amazônia Brasileira
Tangara da Serra is located on southwestern Mato Grosso and is found to be on the route of pollutants dispersion originated in the Legal Amazons deforestation area. This region has also a wide area of sugarcane culture, setting this site quite exposed to atmospheric pollutants. The objective of this work was to evaluate the genotoxicity of three different co
Publicado em: 2010
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35. ZIMORA - UM MODELO NUMÉRICO 3D DE DISPERSÃO ATMOSFÉRICA / ZIMORA - A 3D NUMERICAL MODEL FOR ATMOSPHERIC DISPERSION
In this thesis, we presents a development and validation of a 3D numerical model for the advection-diffusion equation. Models of this kind has been developed for scientific investigations and to support atmospheric emissions control and environmental policy decisions. To develop this model, we used the computational implementation of an explicit numerical sc
Publicado em: 2009
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36. Desenvolvimento e avaliação de estratégias de assistência à pilotagem para aeronaves leves
The following work presents the process of choice and development of a series of strategies to facilitate piloting on light aircrafts. These strategies are based on trajectory control instead of attitude control like it is usually done in conventional aircrafts, aiming smaller learning times as well as reduction in pilot workload, such that flight safety is
Publicado em: 2009