Shadowing
Mostrando 13-24 de 127 artigos, teses e dissertações.
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13. Avaliação da propagação de sinais de radiofrequência para tecnologia Zigbee em granja de frango de corte
Visou-se, neste trabalho, realizar a predição de sinais de radiofrequência para a aplicação de Rede de Sensores Sem Fio (RSSF) de monitoramento e controle em uma granja de frango de corte. A tecnologia de comunicação sem fio utilizada foi a Zigbee, com o padrão IEEE 802.15.4 compondo a camada física e de enlace. Desenvolveu-se, para automatizar a le
Revista Brasileira de Engenharia Agrícola e Ambiental. Publicado em: 2011-01
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14. REQUISITOS TÉCNICOS DA QUALIDADE DO NÍVEL DE EFICIÊNCIA ENERGÉTICA APLICADO EM EDIFICAÇÃO PÚBLICA EM FASE DE PROJETO: O CASO DO CENTRO DE CONVIVÊNCIA PARA IDOSOS EM DOUTOR MAURÍCIO CARDOSO RS / THE TECHNICAL REGULATIONS OF ENERGY EFFIENCY QUALITY LEVELS APPLIED IN PUBLIC BUILDING IN THE DESIGN PHASE: THE CASE OF CONVENIENCE CENTER FOR ELDERLY IN DOUTOR MAURÍCIO CARDOSO RS
The labeling of buildings specified by technical regulations of energy efficiency quality levels presents the technical requirements and the methods for the classification of commercial buildings, services and publics regarding energy efficiency. The work consisted in the application of this regulation in the design phase of the public building the will hous
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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15. O sombreamento de trajetórias no mapa padrão
Os cálculos numéricos envolvendo as soluções de um sistema matemático apresentam ruído em razão dos erros de truncamento e arredondamento efetuados a cada passo. Se o sistema dinâmico apresentar caos, então estes erros são amplificados. Os sistemas dinâmicos hamiltonianos podem apresentar regiões disjuntas onde há ocorrência de caos e periodici
Publicado em: 2010
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16. AnÃlise de atenuaÃÃo de sinal em ambientes indoor usando lÃgica nebulosa / Analysis of signal attenuation for Indoor Environments using Fuzzy Logic
Due to the increasing demand for services related to wireless networks, such as video, voice and video conferencing and to the concern of telecommunications companies to meet this demand efficiently, the planning of a wireless link becomes very important. Since the propagation of a signal over a wireless network is not driven, it can suffer attenuation cause
Publicado em: 2009
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17. O impacto da vegetação nos microclimas urbanos / The Impact of vegetation in urban microclimates
The main purpose of this research is the effects of vegetation in urban microclimate conditions, under the premise that the presence of vegetation influences the microclimate and its surroundings. Considering different forms of green space distribution and using native species, it could quantify the intensity and spatial distribution for the microclimate eff
Publicado em: 2009
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18. Avaliação da instabilidade da modulação em diferentes ambientes / Evaluation of the instability of the modulation in different environments
Este trabalho avalia a cobertura de uma WMAN (Wireless Metropolitan Area Network), com características de um sistema WiMAX (Worldwide Interoperability for Microwave Access) operando em 5.8GHz, de acordo com a modulação utilizada. Para tanto, empregaram-se tanto predições de cobertura quanto medidas de campo. A modulação de uma antena depende do valor
Publicado em: 2008
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19. Desenvolvimento de sistema de monitoramento de produção avicola utilizando rede de sensores sem fio / Development of monitoring system of poultry production using wireless sensor network
It is increasingly necessary to optimize the agricultural production due to environmental or economic pressures imposed by global markets. Aiming at increasing the efficiency of agricultural production come the need to exert greater control in the procedures adopted, especially in poultry barns. The development of control and monitoring systems based on Wire
Publicado em: 2008
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20. Diffraction in QCD
This lecture presents a short review of the main features of diffractive processes and QCD inspired models. It includes the following topics: (1) Quantum mechanics of diffraction: general properties; (2) Color dipole description of diffraction; (3) Color transparency; (4) Soft diffraction in hard reactions: DIS, Drell-Yan, Higgs production; (5) Why Pomerons
Brazilian Journal of Physics. Publicado em: 2007-07
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21. Nuclear effects in HERA-B
In this contribution we estimate the influence of the shadowing effect and initial state parton energy loss in the quarkonium production at HERA-B. We analyze the xF behavior of the effective exponent alpha(xF) and present a comparison with the preliminary HERA-B data for J/psi production. Moreover, we present our predictions for ¡
Brazilian Journal of Physics. Publicado em: 2007-07
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22. Neutrino structure functions in the QCD dipole picture
In this contribution we present an exploratory QCD analysis of the neutrino structure functions in charged current DIS using the color dipole formalism. The corresponding dipole cross sections are taken from recent phenomenological and theoretical studies in deep inelastic inclusive production, including nuclear shadowing corrections. The theoretical predict
Braz. J. Phys.. Publicado em: 2007-06
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23. Open charm tomography of cold and hot nuclear matter
We identify the nuclear effects that modify the cross sections for open heavy flavor production in proton-nucleus and nucleus-nucleus collisions. In p+A reactions, we calculate and resum the coherent nuclear-enhanced power corrections from the final-state parton scattering in the medium. We find that single and double inclusive open charm production can be s
Braz. J. Phys.. Publicado em: 2007-06
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24. Small-x physics at coherent pA/AA interactions at LHC
We report on our recent investigations in photonuclear production of heavy quarks and vector mesons in ultraperipheral collisions at nucleus-nucleus and proton-nucleus reactions. They are initiated by quasi-real photons coming from one of the nuclei or hadron in interactions taking place at large impact parameter. We focus on the role played by the high ener
Brazilian Journal of Physics. Publicado em: 2007-03