Transmission Through Satellite
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. New tools for epidemiology: a space odyssey
Geographical Information Systems (GIS) facilitate access to epidemiological data through visualization and may be consulted for the development of mathematical models and analysis by spatial statistics. Variables such as land-cover, land-use, elevations, surface temperatures, rainfall etc. emanating from earth-observing satellites, complement GIS as this inf
Memórias do Instituto Oswaldo Cruz. Publicado em: 2011-11
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2. REDUCTION OF NON LINEARITY EFFECTS ON OFDM SIGNALS: A PRE-DISTORTION SCHEME BASED ON POWER SERIES / REDUÇÃO DOS EFEITOS DE CANAIS NÃO-LINEARES SOBRE SINAIS OFDM: UM ESQUEMA DE PRÉ-DISTORÇÃO NÃO-LINEAR BASEADO EM SÉRIE DE POTÊNCIAS
The main problems of multiple carriers through non-linear devices are, AM / PM conversion, conversion AM / PM conversion, and intermodulation. These problems are usually present in satellite transmissions, where high-power amplifiers (HPAs) and nonlinear transponders are used, as well as in terrestrial broadcasting systems where, in order to enlarge the serv
Publicado em: 2008
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3. O programa tv escola no município de Irecê : limites e possibilidades da educação a distância no interior do Brasil.
The present work intends to analyze the use of the TV Escola Program, an educational public policy created to strenghten education in Brazil by the means of introducting technologies in public schools. The research was developed in a school network inside Brazil, which provides a vision of the place, of the singularities of an educational system located in t
Publicado em: 2005
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4. Somzoom Sat: do local ao global
Apresentamos a tese Somzoom Sat: local ao global cujo problema de pesquisa nos aponta para: a transmissão via satélite da Rede Somzoom Sat uma cabeça de rede do grupo Somzoom, localizado em Fortaleza, em nível local, regional e global (via internet), contribui para uma difusão da indústria cultural regional? Esta pesquisa resulta de uma inquietação s
Publicado em: 2005
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5. Restauração de imagens do satélite Landsat-7. / Restoration of LANDSAT-7 satellite images.
The techniques of image restoration are oriented for the modeling of the degradation and recovery of the original signal that was degraded during the process of image formation. In Remote Sensing, sensor?s nominal spatial resolution, that defines the precision with which details of objects of interest in the image are perceivable, is one of the most importa
Publicado em: 2003
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6. EFEITOS DE INTERMODULAÇÃO EM SISTEMAS SCPC/FM COM ATIVAÇÃO POR VOZ / INTERMODULATION EFFECTS IN THE TRANSMISSION OF VOICE-ACTIVATED SCPC/FM CARRIERS THROUGH A NONLINEAR REPEATER
Em um sistema satellite SCPC/FM, um grande número de portadoras é amplifcado simultaneamente pela TWT do satélite. Devido à característica não linear desta válvula, surgem, na saída, sinais espúrios resultantes do batimento das diversas freqüências e que interferem nas portadoras desejadas.Desta forma para um bom dimensionamento de um sistema SCPC
Publicado em: 1978
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7. Multi-purpose HealthCare Telemedicine Systems with mobile communication link support
The provision of effective emergency telemedicine and home monitoring solutions are the major fields of interest discussed in this study. Ambulances, Rural Health Centers (RHC) or other remote health location such as Ships navigating in wide seas are common examples of possible emergency sites, while critical care telemetry and telemedicine home follow-ups a
BioMed Central.