Cyclonic Systems
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Use of factorial design for evaluation of plasma conditions and comparison of two liquid sample introduction systems for na axially viewed inductively coupled plasma optical emission spectrometer.
A factorial design was applied to evaluate plasma conditions employing the Mg II 280/Mg I 285 nm intensity ratio in an axially viewed inductively coupled plasma optical emission spectrometer using different sample introduction devices: a concentric or a V-groove nebulizer and a cyclonic or a Sturman-Masters spray chamber. Effects of nebulizer gas flow-rate o
Spectrochimica Acta Part B v. 60. Publicado em: 2011
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2. 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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3. NUMERICAL SIMULATION FOR HYDROCYCLONE DESIGNED TO HIGH OIL CONTENT APPLICATION / SIMULAÇÃO NUMÉRICA DO ESCOAMENTO EM HIDROCICLONE DESTINADO A APLICAÇÕES DE ALTO TEOR DE ÓLEO
Cyclonic separation has became more and more important during the last decades as a unit process for gas-liquid, liquid-liquid and solid-liquid separation, mostly in the Petroleum industry. The off-shore exploration¿s growth requires the development of smaller and lighter equipment. This can be achieved by cyclonic separation once centrifugal fields are sev
Publicado em: 2008
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4. Um estudo observacional da incursão de sistemas frontais no nordeste brasileiro e sua influência na atmosfera do Centro de Lançamento de Alcântara (CLA) / Observacional study of the incursion on frontal systems on northeast Brazil and its influence in the atmosphere of the Alcantara Launching Center (CLA)
In this work, an observational synoptic configuration pattern study was performed over the South America (SA) and in the South Atlantic (SAO) and South Pacific Oceans (SPO), in events of Frontal Systems (FSs) that reached the Brazilian northeast coast and created an intense cloudiness in the region of the Alcântara Launching Center (ALC). Seven cases were s
Publicado em: 2008
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5. APERFEIÇOAMENTO E APLICAÇÕES DE UMA METODOLOGIA PARA ANÁLISE DE ESPECIAÇÃO DE ARSÊNIO POR ELETROFORESE CAPILAR COM DETECTOR DE ICPMS / IMPROVEMENTS AND APPLICATIONS OF A METHODOLOGY FOR THE SPECIATION ANALYSIS OF ARSENIC USING CAPILLARY ELECTROPHORESIS WITH ICPMS DETECTOR
Capillary electrophoresis (CE) is a well established separation technique for the study of elemental speciation, however, its low electroosmotic flow nL min(-1) restricts its application in many studies in which low detection limits are required. For this reason, the study of CE coupling (hyphenation) to more sensitive detectors is of great relevance. This w
Publicado em: 2006
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6. A influência do vórtice ciclônico de altos níveis (VCAN) sobre a precipitação do nordeste do Brasil (NEB) e as características associadas / The influence of upper tropospheric cyclonic vortex (UTCV) on the rainfall over the northeast brazil (NEB) and the caracteristics associates
Os sistemas ciclônicos de altos níveis, Vórtice Ciclônico de Altos níveis e Cavados de Altos Níveis (VCAN/CAN) sobre o Nordeste do Brasil (NEB) e oceano adjacente exercem grande influência na precipitação de diferentes sub-regiões do NEB no período de verão austral. São analisadas as características e ocorrência dos VCAN/ CAN sobre e próximo
Publicado em: 2005
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7. A influência do vórtice ciclônico de altos níveis (VCAN) sobre a precipitação do nordeste do Brasil (NEB) e as características associadas / The influence of upper tropospheric cyclonic vortex (UTCV) on the rainfall over the northeast brazil (NEB) and the caracteristics associates
Os sistemas ciclônicos de altos níveis, Vórtice Ciclônico de Altos níveis e Cavados de Altos Níveis (VCAN/CAN) sobre o Nordeste do Brasil (NEB) e oceano adjacente exercem grande influência na precipitação de diferentes sub-regiões do NEB no período de verão austral. São analisadas as características e ocorrência dos VCAN/ CAN sobre e próximo
Publicado em: 2005
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8. Previsão e análise sobre as regiões sudeste e sul do Brasil utilizando redes neurais artificiais / Forecast and analysis of rainfall over south and southeastern Brazil using artificial neural network
This study uses an Artificial Neural Network (ANN) technique to establish a non-linear relationship between the large scale atmospheric circulation and local surface rainfall. The method involves the use of statistical downscaling applied to outputs from Eta model. In this sense, prognostic equations were developed for 18 locations using the ANN. This method
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/12/2003
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9. Principais sistemas sinópticos que atuaram sobre a Península Antártica no verão de 2001/2002 e a circulação troposférica associada / The main synoptic system that effected the Antartic Peninsula in the 2001/2002 summer and the associated tropospheric circulation
The behaviour of synoptics systems which affected the Antarctica Peninsula and Drake Passage during the Operantar XX, in the 2001/2002 summer, were analysed in this study. Three main methods were developed. The first one, is to evaluate the behaviour of the large and mesocyclones which occurred in the area, during december, january and february, using satell
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 200302
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10. Forecast and analysis of rainfall over south and southeastern Brazil using artificial neural network / Previsão e análise sobre as regiões sudeste e sul do Brasil utilizando redes neurais artificiais
This study uses an Artificial Neural Network (ANN) technique to establish a non-linear relationship between the large scale atmospheric circulation and local surface rainfall. The method involves the use of statistical downscaling applied to outputs from Eta model. In this sense, prognostic equations were developed for 18 locations using the ANN. This method
Publicado em: 2003
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11. Principais sistemas sinópticos que atuaram sobre a Península Antártica no verão de 2001/2002 e a circulação troposférica associada / The main synoptic system that effected the Antartic Peninsula in the 2001/2002 summer and the associated tropospheric circulation
The behaviour of synoptics systems which affected the Antarctica Peninsula and Drake Passage during the Operantar XX, in the 2001/2002 summer, were analysed in this study. Three main methods were developed. The first one, is to evaluate the behaviour of the large and mesocyclones which occurred in the area, during december, january and february, using satell
Publicado em: 2003
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12. Variabilidade interdiurna da convecção na América do Sul: a propagação meridional da convecção / Day-to-day convective variability over south America: the meridional propagation of convection.
A climatology for the meridional propagation of convection (MPC) over South America (SA) for the 1983-93 years is built by using cloud and atmospheric circulation composites. Results reveal three important types of MPC over SA. Type 1 focuses the frequent penetrations of cold fronts that organize tropical convection and move with it towards equator. Type 1 i
Publicado em: 2003