Atmospheric Fragmentation
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. CARACTERIZACIÓN Y CUANTIFICACIÓN DE FRAGMENTOS DE BOSQUE NATIVO, EN UN SECTOR DEL SECANO INTERIOR DE LA REGIÓN DEL MAULE, CHILE
ABSTRACT In general, the Mediterranean forests have suffered high levels of fragmentation, mainly by anthropogenic action, as result of the productive activities of agriculture and livestock, human settlements and forest plantations of fast growing exotic species, leading to loss of continuity of natural forests, and thus a decrease of biodiversity. In this
Ciênc. Florest.. Publicado em: 2013-09
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2. Estudo de modelos e condições iniciais da geração a priori de detritos espaciais e sua propagação orbital / Study of models and initial conditions of a priori generation of space debris and their orbital propagation
Currently, it is estimated that there are hundreds of thousands of space debris, of various sizes, around the Earth. The space debris, also known as orbital debris, can remain in orbit with other bodies for a long time; and can cause risks of collision, including with space vehicles still in operation. In addition, there are risks of potential accidents by r
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/04/2011
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3. Fragmentação por ação aerotermodinâmica e predição da área de impacto de um veículo espacial com injeção controlada da re-entrada / Aerothermodynamically-induced fragmentation and prediction of the area of impact of a space vehicle with controlled injection of the re-entry
Este trabalho consiste em estudar a fragmentação por ação aerotermodinâmica durante re-entrada de um veículo espacial, com estimativa da área de impacto dos fragmentos na superfície terrestre. Inicialmente, são realizadas manobras de decaimento orbital controlado através de transferências ótimas impulsivas. Tais impulsos são aplicados no sentido
Publicado em: 2009
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4. Aerothermodynamically-induced fragmentation and prediction of the area of impact of a space vehicle with controlled injection of the re-entry / Fragmentação por ação aerotermodinâmica e predição da área de impacto de um veículo espacial com injeção controlada da re-entrada
Este trabalho consiste em estudar a fragmentação por ação aerotermodinâmica durante re-entrada de um veículo espacial, com estimativa da área de impacto dos fragmentos na superfície terrestre. Inicialmente, são realizadas manobras de decaimento orbital controlado através de transferências ótimas impulsivas. Tais impulsos são aplicados no sentido
Publicado em: 2009
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5. The use of computational chemistry in the studies of chemical processes involved in electrospray ionization / A utilização da química computacional em processos químicos relacionados à ionização por electrospray
In recent decades, the development of atmospheric ionization techniques improved mass spectrometry, principally for characterization and structural elucidation of high-molecular weight compounds. The development of spray ionization was responsible for the spread of applications and studies of mass spectrometry, where the electrospray ionization is the most v
Publicado em: 2009
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6. Adverse effects of acid rain on the distribution of the Wood Thrush Hylocichla mustelina in North America
Research into population declines of North American bird species has mainly focused on the fragmentation of habitat on the breeding or wintering grounds [Robinson, S. K., Thompson, F. R., Donovan, T. M., Whitehead, D. R. & Faaborg, J. (1995) Science 267, 1987–1990]. In contrast, research into declines of European species has mainly focused on intensificati
National Academy of Sciences.
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7. Formation of cis-14,15-oxido-5,8,11-icosatrienoic acid from phosphatidylinositol in human platelets.
Human platelets contain a soluble enzyme or enzyme system that catalyzes the formation of lysophosphatidylinositol and a compound more polar than arachidonic acid (compound A) from 2-arachidonoyl sn-phosphatidylinositol. Arachidonic acid, 2-arachidonoyl sn-phosphatidylcholine, or 2-arachidonoyl sn-phosphatidylethanolamine did not serve as substrate for the p
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8. The current biodiversity extinction event: Scenarios for mitigation and recovery
The current massive degradation of habitat and extinction of species is taking place on a catastrophically short timescale, and their effects will fundamentally reset the future evolution of the planet's biota. The fossil record suggests that recovery of global ecosystems has required millions or even tens of millions of years. Thus, intervention by hum
The National Academy of Sciences.