Synthetic Wind
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. POTENTIAL DRIFT AND INJURY OF HERBICIDES SPRAYED IN A WIND TUNNEL
ABSTRACT The possibility of synthetic auxin applications in crops increases the risk of injury to sensitive plants. The aim of this study was to quantify the drift of herbicides sprayed in a wind tunnel and the injury in cotton plants. The experimental design was a completely randomized design with five treatments and four replications. The tested spray solu
Eng. Agríc.. Publicado em: 2019-02
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2. Acoplamento de simulador de imagens SAR a interpretador MPI para estimação do espectro direcional de ondas. / Coupling of a SAR image simulator with the MPI algorithm for the estimation of the directional wind wave spectrum.
A prototype of a graphical interface for SAR (Synthetic Aperture Radar) images has being developed and improved. In its current stage, the tool is able to extract the directional wave spectrum and the wind field of ERS 1&2 images. Among the various approaches used in developing the prototype, the evaluation of the currently used methodology in the image inte
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/05/2012
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3. AnÃlise de campos de ventos oceÃnicos em imagens SAR / ANALYSIS OF OCEAN WINDS FIELDS IN IMAGES SAR
Esta tese introduz uma nova metodologia para determinar a direÃÃo do vento sobre a superfÃcie dos oceanos utilizando tÃcnicas de processamento das imagens de Radar de Abertura SintÃtica (SAR, do inglÃs Synthetic Aperture Radar). A literatura relacionada demonstra um crescente interesse no processamento dessas imagens para detecÃÃo de alvos, classific
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/09/2011
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4. Determination of marine wind fields in the Campos basin from ENVISAT/ASAR images / Extração do campo de vento na Bacia de Campos, RJ, a partir de imagens ENVISAT/ASAR
The knowledge of ocean surface winds is very important for oceanographic and meteorological studies as well as for practical applications. Considering the great difficulty of installation, operation and maintenance of instrumentation for the in situ measurement of marine winds, it is of high interest the development of methodologies for obtaining this variab
Publicado em: 2007
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5. Extração do campo de vento na Bacia de Campos, RJ, a partir de imagens ENVISAT/ASAR / Determination of marine wind fields in the Campos basin from ENVISAT/ASAR images
O conhecimento do campo de vento na superfície dos oceanos é muito importante para estudos e aplicações oceanográficas e meteorológicas. Considerando a grande dificuldade de instalação, operação e manutenção de instrumentos para medir o vento in situ nos oceanos, é de grande interesse o desenvolvimento de metodologias de obtenção dessa variáv
Publicado em: 2007
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6. Reproductive behavior and sex pheromone identification of Pseudaletia sequax (Lepidoptera: Noctuidae) / Comportamento reprodutivo e identificação de feromônio sexual de Pseudaletia sequax (Lepidoptera: Noctuidae)
The effects of pupal period and age on calling behavior of virgin females of Pseudaletia sequax were determined. Larvae were reared on artificial diet. Calling behavior of groups of females of similar age of pupation was observed every 10 minutes for six days at reversed photoperiod. Females were considered calling when they had assumed a characteristic posi
Publicado em: 2007
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7. Contribution to the studyof chemical comunication in Lutzomyia longipalpis AND Lutzomyia cruzi (Diptera: Psychodidae: Phlebotominae) / Contribuição ao estudo da comunicação química em Lutzomyia longipalpis e Lutzomyia cruzi (Diptera: Psychodidae: Phlebotominae)
Ultrastructural cytochemistry of sex pheromone gland cells in abdominal tergites of Lutzomyia cruzi males showed the presence of large amounts of lipid inclusions, peroxisomes, mitochondria and endoplasmic reticulum profiles. In L. longipalpis it was demonstrated that these lipid inclusions appear in the gland cell cytoplasm about 9 hours after adult emergen
Publicado em: 2006
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8. Sistema especialista de apoio à elaboração de arranjo físico para sistema intensivo de produção de leite em confinamento tipo baias livres / Expert system to the elaboration of physical facilities for intensive milk production system in free stall type confinement
The search for technological alternatives that could optimize the productive processes, increase the quality, make flexible and reduce the production costs of the milk has promoted the directing of the agricultural researches toward the computer science field, which is another way to generating efficient scientific answers therefore partly reducing the subje
Publicado em: 2006
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9. AnÃlise de projeto de turbina eÃlica de grande porte para as condiÃÃes climÃticas da regiÃo Nordeste do Brasil
The main aim of this work is to quantify the modifications on the energy generation and extreme and fatigue loads of a wind turbine operating particularly in a well concentrated wind speed distribution near to the mean value. This particular meteorological condition is commonly found in the Northeast region of Brazil. The wind speed distribution is modeled i
Publicado em: 2005
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10. Análise dinâmica elasto-plástica de estruturas metálicas sob excitação aleatória de vento. / Elastic-plastic dynamic analysis of steel structures under random vibrations excited by the wind.
This work presents a numerical model to analyze structures under random dynamic excitation induced by the wind. The structure is considered to have nonlinear behavior due to the elastic-plastic constitutive law adopted for the material, structural steel. The members of the studied structures may experience formation or disappearance of plastic hinges, leadin
Publicado em: 2003
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11. Adaptation of antennal neurons in moths is associated with cessation of pheromone-mediated upwind flight.
A wind-borne plume of sex pheromone from a female moth or a synthetic source has a fine, filamentous structure that creates steep and rapid fluctuations in concentration for a male moth flying up the plume's axis. The firing rates from single antennal neurons on Agrotis segetum antennae decreased to nearly zero within seconds after the antennae were placed i
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12. Space weathering on airless planetary bodies: Clues from the lunar mineral hapkeite
Physical and chemical reactions occurring as a result of the high-velocity impacts of meteorites and micrometeorites and of cosmic rays and solar-wind particles are major causes of space weathering on airless planetary bodies, such as the Moon, Mercury, and asteroids. These weathering processes are responsible for the formation of their regolith and soil. We
National Academy of Sciences.