Surface Heat Balance
Mostrando 13-24 de 24 artigos, teses e dissertações.
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13. Surface fire spread model based on lumped parameter approach / Modelo de propagação de fogo em incêndios de superfície baseado no método nodal
This work presents a new approach for a surface re spread model applicable to wildland re modelling. The mathematical method used in the modeling is the lumped parameter approach. In this method the thermal domain is divided in a nite number of volumes, supposed isothermal and with homogeneous properties, called nodes. To each node are attributed a temperatu
Publicado em: 2007
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14. TURBULENT FLOWS OF CO2 IN A RICE CROP IRRIGATED IN RS (BRAZIL) / FLUXOS TURBULENTOS DE CO2 EM UMA ÁREA DE ARROZ IRRIGADO NO RS
This thesis quantifies the net change of CO2 (NEE) in an irrigated rice crop cultivation in RS (Brazil). The research is part of the project CT-HIDRO, which presents as main purpose the description of surface conditions for different ecosystems in the country. Data were gathered during the cultivation period, from October 2003 to March 2004. During this time
Publicado em: 2007
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15. Estimativa da temperatura e do saldo de radiação à superfície terrestre em Maceió-AL utilizando imagens TM/LANDSAT 5
The considered work esteem, by means of data of multispectral images of the Landsat 5 - TM, vegetation indices, albedo, surface temperature surface and the balance of radiation of the city of Maceió relating them with the urban mesh. The city of Maceió, in last the 30 years, it had its intensified areal growth, that is, the substitution of green areas for
Publicado em: 2006
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16. Balanço de radiação, energia e fluxo de CO2 em ecossistema de manguezal na Amazônia / Radiation and energy balance and fluxes of CO2 in a Amazon mangrove ecosystem
This work use the longest series of continuous meteorological data and fluxes measurements of CO2, sensible heat and latent heat made in Amazon mangrove ecosystem. The series used in this study corresponds to the period of November, 2002 to August, 2003. The meteorological data were collected using an EDISOL system based on the hedí covariance technique. Th
Publicado em: 2006
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17. Interaction between terrestrial ecosystems and the atmosphere in Amazonia: biogeophysical and biogeochemical connections / Interação entre ecossistemas terrestres e a atmosfera na Amazônia: conexões biogeofísicas e biogeoquímicas
The Amazon is considered by many one of the most important areas of the planet, including extensive areas of tropical forest. However, the forest has been dramatically modified by the deforestation changes in the CO2 concentration night also affect the forest structure. This work aims at better understand the biosphere-atmosphere interaction in the Amazonian
Publicado em: 2006
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18. Transient convective heat transfer
In nature, as well as within the human-made thermal systems, the time-variable regimes are more commonly encountered, if not always, than the permanent regimes. Nevertheless, studies in convection are still more frequent in the permanent regimes, undoubtedly due to the related difficulties in calculation in terms of time and cost of computation. One may dist
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2005-03
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19. Balanço de energia e evapotranspiração de cafezal adensado em crescimento sob irrigação localizada. / Energy balance and evapotranspiration in a high density young coffee under located irrigation.
The objectives of this study were to evaluate the magnitude of global evapotranspiration (ETc) in a high density young coffee crop (3.5mx0.9m) under drip irrigation, the ETc partition considering hedgerows and interrows, and the partition of the available radiant energy between sensible and latent heat fluxes. The experiments were conducted from September 20
Publicado em: 2005
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20. BalanÃo hÃdrico e de energia em solo cultivado e sem vegetaÃÃo, para as condiÃÃes do brejo paraibano / Water and energy balance in the cultivated and bare soil in a montane area in paraiba, Brazil
In the areas of rainfed agriculture it is very important to quantify losses of water by evapotranspiration and soil evaporation. The methods used for measuring evapotranspiration and/or evaporation varies from direct measurements techniques, using lysimeters, to measurements of the water and energy balances. The precision lysimeters have high cost, being onl
Publicado em: 2004
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21. Estudo do comportamento termodinÃmico das Ãreas centrais de negÃcios de BrasÃlia e de Taguatinga, Distrito Federal
The study of the climate is part of the urban environmental dimension and has been contributed towards the matters of the environment of the cities. The understanding of the urban climate as an important component in the constitution of the environment is one of the greatest issues of the modern world. This essay gets methodological reference from the thermo
Publicado em: 2004
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22. Estudo do balanço de radiação em área de policultivo na amazônia / Study of radiation balance over Amazonian policulture area
Micrometeorological observations have been used to study the radiation balance over recultivation areas of the SHIFT Project in the Central Amazon, during the dry season. The site was first cleared of primary forest to make way for an experimental rubber plantation which was abandoned soon after. Later, the secondary forest which had evolved was cleared and
Publicado em: 2000
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23. Tranferencia de calor no escoamento de gases participantes em alta temperatura atraves de dutos de secção circular revestidos com isolamento não ideal
In this Master degree thesis, the heat transfer in the flow of participating gases through circular cross section ducts is studied, combining the three basic processes: conduction, convection and radiation. It is considered the case in which a high temperature gas tlows through a tube covered by a non-ideal insulation. The gas inlet temperature is uniform an
Publicado em: 1995
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24. Prevention of autoimmune disease due to lymphocyte modulation by the B-subunit of Escherichia coli heat-labile enterotoxin
We demonstrate that the receptor binding moiety of Escherichia coli heat-labile enterotoxin (EtxB) can completely prevent autoimmune disease in a murine model of arthritis. Injection of male DBA/1 mice at the base of the tail with type II collagen in the presence of complete Freund’s adjuvant normally leads to arthritis, as evidenced by inflammatory infilt
The National Academy of Sciences of the USA.