Spectral Energy Distribution
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. Sensoriamento remoto aplicado à análise temporal da relação uso da terra/temperatura e albedo de superfície na bacia do Rio Vieira no Norte de Minas Gerais
This study aimed to analyze with the help of TM data - Landsat 5, the relationship between the changes in land use and the variation of temperature and surface albedo, during period winter in basin River Vieira for the years 1985, 1995 and 2010. The choice of river basin Vieira is justified because this area, located in the North of Minas Gerais, was the sce
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/03/2012
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2. Espectroscopia de alcalinos em Hélio líquido / Spectroscopy of Alkali in Liquid Helium
Alkali atoms are good probes for the understanding of liquid He properties. As such considerable experimental attention has been devoted to the analysis of the changes of line position and widths of the absorption spectra of alkali atoms in liquid He environment. On the theoretical side, several studies have used simplified models such as bubble and cluster
Publicado em: 2010
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3. SENSORIAMENTO REMOTO APLICADO AO ESTUDO DO COMPORTAMENTO ESPECTRAL DA ÁGUA NO RESERVATÓRIO PASSO REAL RS / REMOTE SENSING APPLIED TO THE STUDY ON WATER SPECTRAL BEHAVIOR IN PASSO REAL RS RESERVOIR
The building of reservoirs for energy generation and water flow control generated river environmental changes as well as modifications on fluvial environment. In such context, remote sensing is a tool that enables spatial analysis and temporal aquatic environmental information acquisition. This research present a study on water spectral behavior in Passo Rea
Publicado em: 2009
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4. Análise multi-espectral dos eventos cíclicos de Carinae / Multi-spectral analysis of the cyclic events of Eta Carinae
In this thesis, a multi-wavelength study on the cyclic events of Eta Carinae was performed. The presence of a hole in the polar region of the Homunculus was confirmed by the velocity maps of the [Fe II] 12567 line. The blue-shifted component of the He I 10830, detected towards the NW lobe, was mapped and it is in the equatorial plane. It was observed that wi
Publicado em: 2009
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5. Simulação de espectros do radical C2* para estudos de combustão / Simulation of C2* radical spectra for combustion studies
The diagnostics of particular species in combustion processes is the key for the development of combustion devices, such as burners, chambers, etc. and also to the understanding of these processes through the study of chemical reaction mechanisms with the aid of mathematical models. One of the diagnostic techniques employed with great success is the emission
Publicado em: 2009
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6. Caracterização infravermelho e distribuição espectral de energia para as estrelas com planetas
In this work we study the behavior of the stars belonging to planetary systems in what concern implications its infrared characteristics and the spectral energy distribution (SED). Our study is based on detailed analysis of the behavior on the infrared emission for 48 stars with planets, classied as stars on the main sequence, subgiants and giants. The data
Publicado em: 2008
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7. Medida da temperatura de íons em um propulsor a plasma do tipo hall via espectroscopia óptica
Spectroscopy is one of the most used techniques concerning the study of plasma, owning particulary to the fact that it is a non-intrusive method. Others plasma diagnostic techniques with emissive probe and energy analyzers perform the desired measurement but interfere in the field configuration as well as in plasma itself provoking plasma cooling and ions re
Publicado em: 2008
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8. High-energy gamma-ray production in microquasars
A hadronic model for gamma-ray production in microquasars is presented. Microquasars are galactic binary systems with jets, which have, presumably, hadronic components. We consider a microquasar formed by a neutron star that accretes matter from the equatorial wind of a Be primary star. The collision between the jet, emitted by the compact object, and the de
Brazilian Journal of Physics. Publicado em: 2007-07
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9. Dependência das propriedades da região-D ionosférica com o ciclo de atividade solar / Dependence of ionospheric D region properties on solar activity cycle
The goal of this work is to provide new clues for a better understanding of the quiescent ionosphere during different solar activity conditions. For that we study the lower ionospheric response to external perturbations, as solar X-rays emitted during flares. We use solar X-ray fluxes provided by GOES satellites, and ionospheric SPA (Sudden Phase Anomalies)
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/07/2006
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10. Caracterização e dosimetria de feixes de raios-x de 100 e 140kVp usados em radioterapia
Radiotherapy is the modality used in the treatment of malignant neoplasias that aims the deposition of a controlled amount of ionizing radiation in a limited area of the patient body. In order to provide a well-known and as accurate as possible absorbed dose for controlling a lesion, all characteristics of the treatment radiation beam must be known. For this
Publicado em: 2006
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11. Utilização de wavelets no processamento de sinais EMG
This study proposes an approach to analyze EMG signals using wavelets transformed as a method of signal features extraction. The adopted methodology is based on the study of the aggregated power envelope and the aggregate power spectrum envelope, which are obtained from the distribution of energy of a certain signal, based on the potency of wavelet coefficie
Publicado em: 2006
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12. Relativistic jets and accretion phenomena associated with galactic and extragalactic black holes
More than a dozen binary star systems hosting stellar-mass black holes have been discovered in our galaxy. Some of them eject collimated relativistic jets with apparent velocities larger than the light speed. These objects have been named microquasars thanks to their similarity with the distant quasars or active nuclei of galaxies that host supermassive blac
Brazilian Journal of Physics. Publicado em: 2005-12