Surface Protection Systems
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. Conservation system improves soil microbial quality and increases soybean yield in the Northeastern Cerrado
ABSTRACT The conservation tillage systems is based on the surface protection by crop residue and reduced soil disturbance. These two principles can favor the soil quality and promote sustainable agricultural systems. The study was developed with the objective of measure soil microbial biomass, soil basal respiration, enzymatic activity and soybean yield in c
Bragantia. Publicado em: 2020-12
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2. One-Dimensional Thermal Analysis Model for Charring Ablative Materials
ABSTRACT: This paper presents a one-dimensional model for the analysis of the charring ablative materials used in spacecraft thermal protection systems. The numerical method is based on an implicit finite difference formulation of the governing equations written for a system of mobile coordinates that accounts for the possible presence of surface recession.
J. Aerosp. Technol. Manag.. Publicado em: 15/02/2018
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3. Configuration Study of Structurally Integrated Thermal Protection Systems for a Sub-Orbital Platform
ABSTRACT: The atmospheric hypersonic flight of sub-orbital and space vehicles generates aerodynamic heating and high wall heat fluxes, inducing high temperatures on the vehicle's structures and affecting their mechanical behavior, besides degrading the operation of board equipment. Furthermore, since payload preservation is always mandatory, the use of effic
J. Aerosp. Technol. Manag.. Publicado em: 2015-06
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4. Caracterização batimétrica e fisicooceanográfica do canal de acesso ao porto de Cabedelo/PB: uma análise ambiental ao derrame de óleo
The State of Paraíba is one of the most dynamic states of Brazil, strategically located in the northeast, is notable for the excellent potential for integration of different transportation modes forming the states of Rio Grande do Norte, Pernambuco and Alagoas. The dynamic that occurs with port activity causes changes in the space where it is installed. And
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 30/06/2011
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5. Desenvolvimento e avaliação imunológica de Nanotubos de Carbono funcionalizados com a proteína de envelope de Dengue virus 3
In terms of epidemiologic impact, Dengue (DENV) infections represent the most important infectious disease in Brazil. Consequently, the development of an efficient vaccine is considered a high priority. Due to this fact, many studies are being developed towards this goal, but no vaccine is currently available to the population. Carbon Nanotubes (CNT) have be
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2011
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6. "Resistência à Corrosão de Aços Inoxidáveis em Solução Sintética de Condensado de Álcool Combustível / "Resistência à Corrosão de Aços Inoxidáveis em Solução Sintética de Condensado de Álcool Combustível
Nowadays a great effort had been directed to research work in order to attend the environmental protection agencies demands for minimizing the levels of gases emission pollutants. The consumers requirements for more economic and durable vehicles had motivated also the researchers to look for more corrosion resistance materials in order to substitute the trad
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2010
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7. Degradation of carbon-based materials under ablative conditions produced by a high enthalpy plasma jet
Abstract: A stationary experiment was performed to study the degradation of carbon-based materials by immersion in a plasma jet. In the experiment, graphite and C/C composite were chosen as the target materials, and the reactive plasma jet was generated by an air plasma torch. For macroscopic study of the material degradation, the sample's mass losses were m
J. Aerosp. Technol. Manag.. Publicado em: 2010-04
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8. Heat and mass transfer in two-phase flow around airfoils with aeronautical anti-ice systems. / Transferência de calor e massa no escoamento bifásico em torno de aerofólios equipados com sistemas de antigelo aeronáuticos.
It is required to prevent ice accretion on wings and horizontal stabilizers because it may cause aerodynamic performance degradation, weight increase, flight control difficulties and, in critical cases, may lead to operational safety margins reduction. When aircraft flies through clouds containnig supercooled water droplets, which are in metastable equilibri
Publicado em: 2009
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9. Estoque e qualidade da matéria orgânica do solo em áreas cultivadas com café sob sistemas agroflorestal e a pleno sol / Soil organic matter stock and quality in agroforestry and full sun coffee systems
Soil organic matter (SOM) restoring is considered a main goal in the enhancement of soil quality. The evaluation of changes in the SOM as a result of soil management practices is fundamental to identify strategies to increase agricultural production, avoiding soil degradation and decreasing the emission of greenhouse gases. In Brazil, no-tillage has been bro
Publicado em: 2009
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10. Novas ferramentas para monitoramento ambiental usando SIG Web
The use of Geographic Information Systems (GIS) has becoming very important in fields where detailed and precise study of earth surface features is required. Applications in environmental protection are such an example that requires the use of GIS tools for analysis and decision by managers and enrolled community of protected areas. In this specific field, a
Publicado em: 2008
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11. Alterações no estoque e taxa de sequestro de carbono em um Latossoto vermelho submetido a sistemas de manejo.
The objective of this study was to quantify the changes of the total carbon (C) and total nitrogen (N) stock, and the variation of the C pools in monthly soil samples, and the C balance and C sequestration rates provoked by the soil tillage systems. The soil samples were accomplished in a long term experiment implanted in 1988, in the experimental station of
Publicado em: 2006
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12. Estruturas de concreto arquitetônico - Projeto, execuções e recebimento / Arquitectural concrete structures - Project, Execution and Receiving
O uso do concreto como elemento arquitetônico é uma ferramenta antiga, muito utilizada nos projetos arquitetônicos desde a Roma antiga, passando pela era modernista e chegando aos dias atuais. Porém, com o desenvolvimento de novos materiais e técnicas, nosso simples concreto, apenas cinza, pode gerar infinitas cores e texturas; No Brasil, mesmo com uma
Publicado em: 2006