Atmospheric Systems
Mostrando 25-36 de 125 artigos, teses e dissertações.
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25. Ciclagem de carbono em ecossistemas terrestres: o caso do cerrado brasileiro.
ABSTRACT: In the Cerrado Biome, the internal carbon cycling, the main carbon pools size, and the fluxes intensity between carbon pools are far from to be completely understood. This study presents the main carbon pools and cycling fluxes in terrestrial ecosystems, emphasizing the neotropical savannas. This study will also review literature of internal carbon
Planaltina. Publicado em: 2011
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26. Os climas do Rio Grande do Sul : variabilidade, tendências e tipologia
This thesis focuses on the analytical study of the climate in the state of Rio Grande do Sul (Brazil), addressing the variability (spatial-temporal) of climatic-meteorological elements and the approach of their trends based on the climate classification in the area. In association with this analysis is the recognition of climate variability in regional scale
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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27. Determinação experimental e modelagem de temperatura de ebulição e pH de sistemas binarios contendo compostos presentes em sucos de frutas / Experimental determination and modeling of boiling pont pH of binary systems containing fruit juice compunds
The vapor-liquid equilibrium of binary aqueous solutions of D-glucose and D-fructose, present in fruit juices, was evaluated by experimental boiling point measurements in a rotary evaporator with total reflux of the vapor phase from 20 kPa to atmospheric pressure (93.6 kPa) and concentration from 10 to 60 % by mass. The experimental data were correlated with
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/04/2010
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28. Ecological study of the effects of particulate matter atmospheric polution over the population of Piracicaba-SP / Estudo ecologico dos efeitos do material particulado atmosferico inalavel sobre a população do municipio de Piracicaba-SP
Countless studies point to associations between events of air pollution and increase in mortality from diseases of the circulatory and respiratory systems. The city of Piracicaba- SP is considered a center of national industrial production relying on steel industries and sugarcane and alcohol mills that require extensive crops of sugarcane in which is common
Publicado em: 2010
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29. Assimilação de dados com redes neurais artificiais em modelo de circulação geral da atmosfera / Data assimilation with artificial neural networks in atmospheric general circulation model
Weather forecasting systems require a model for the time evolution and an estimate of the current state of the system. The numerical weather prediction (NWP) incorporates the equations of atmospheric dynamics with physical process and it can predict the future state of the atmosphere. Data assimilation provides such an initial estimate of the atmosphere wher
Publicado em: 2010
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30. Uma análise do coeficiente de remoção de poluentes em função do espectro de gotas de chuva em diferentes localidades no Brasil e Alemanha
The pollutant transference among reservoirs atmosphere-hydrosphere, relevant to the atmospheric chemistry, depends upon scavenging coefficient (Λ) calculus, which depends on the raindrop size distribution as well as on the rainfall systems, both different to each locality. In this work, the Λ calculus will be evaluated to gas SO2 and particulate matter fin
Química Nova. Publicado em: 2010
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31. Test case generation for space area systems using test criteria for finite state machines / Geração de casos de teste para sistemas da área espacial usando critérios de teste para máquinas de estados finitos
Test case generation based on Finite State Machines (FSM) has been addressed for quite some time. Model-Based Testing has drawn attention from researchers and practitioners in test area. Several test criteria have been proposed in the literature in order to validate systems built according to some modeling formal technique, for example, the FSM. Through MEF
Publicado em: 2010
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32. Atmospheric patterns associated with concentrations of tropospheric ozone in the metropolitan region of Sao Paulo / Padrões atmofésricos associados a concentrações de ozônio troposférico na região metropolitana de São Paulo
In the past few years, tropospheric ozone has been noticed to exceed the states environmental agency (CETESB) air quality standards more than any other air pollutant in the Sao Paulo Metropolitan Area (SPMA), Brazil. Its assumed that different atmospheric patterns are responsible for different impacts on ozone concentrations, due to already known phenomena c
Publicado em: 2009
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33. Study of the atmospheric and oceanic conditions in the southweast atlantic and its relation with the Brazilian sardine catch extremes / Estudo das condições atmosféricas e oceânicas do atlântico sudoeste e suas associações com extremos de captura da sardinha-verdadeira
The Brazilian Sardine is an important fishing resource for the country, with restricted occurrence in the Southeast Brazilian Bight (SBB). Landing records of this species shows years of high capture, as in 1973 with 225 thousand tons and the minimum in 2000 with 20 thousand tons. In this work was studied the oceanic and atmospheric characteristics of the mos
Publicado em: 2009
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34. Estudo termodinamico do equilibrio liquido-liquido visando a remoção do enxofre do oleo diesel com liquidos ionicos / Thermodynamic study of liquid-liquid equilibrium aiming sulfur removal by using ionic liquids
The sulfur contaminants more difficult to remove from diesel oil by hydrodesulfuration process (HDS) are the sterically hindered aromatic compounds, like dibenzothiophene (DBT), and its alkylated derivatives 4-methyl-dibenzothiophene (4-MDBT) and 4,6-dimethyl-dibenzothiophene (4,6-DMDBT), commonly called DBTs. Increasing the number of methyl groups attached
Publicado em: 2009
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35. The impact of urbanization on the distribution of lightning induced voltages on overhead lines / O impacto do aumento da urbanização nos niveis das tensões induzidas por descargas atmosfericas nas proximidades de linhas de transmissão
Some of the worst damage caused by lightning is indirect, that is, it is caused by electromagnetic fields radiated from this kind of natural phenomenon resulting in electromagnetic compatibility problems or in challenges for designers of surge protection systems and shields against these interferences. This work considers one of these indirect effects, induc
Publicado em: 2009
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36. Caracterização mineralógica e da matéria orgânica do solo por técnicas espectroscópicas e DRX
Organic matter is the main agent present in the soil due to some of its actions, for example: responsible by source of nutrient for the plants, avoid erosive process, improve the aggregates stability, and act as a drain to atmospheric CO2, among others. Therefore, there are same management practice to enforce an increase in the percentage of soil organic mat
Publicado em: 2009