Air Incident
Mostrando 1-12 de 27 artigos, teses e dissertações.
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1. Vegetation Burning in Pampa Biome Altered the Chemical Composition of Rainfall
ABSTRACT Rainfall is one of the primary nutrient inputs to vegetation and its chemical composition is dependent on air quality as falling rain scavenges gaseous and particulate emissions from natural, industrial, and agricultural activities. The objective of this study was to evaluate whether the vegetation burn in a region of the Pampa biome influences the
Floresta Ambient.. Publicado em: 04/07/2019
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2. EMPREGO DE QUÍMICA COMPUTACIONAL NA VERIFICAÇÃO E VALIDAÇÃO DA PRESSÃO DE DETONAÇÃO DE EXPLOSIVO PLÁSTICO-PBX
Prediction of chemical explosions parameters is an important step for blast tests for civil and military applications. Applying computational chemistry and experimental results, this paper presents the decay rate of pressure in air from the epicenter of 2.70 kg of PBX-Plastic bonded explosive detonation to the distance of 2.0 meters. Pressure in the epicente
Quím. Nova. Publicado em: 2018-03
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3. Study on patient dosimetry and image quality in digital mammography
Abstract Introduction Digital mammography present many advantages in comparison to conventional mammography, such as high dynamic range and the post-processing of acquired images. One problem is that protocols may not be optimized, resulting in higher absorbed doses to patients. The objective of this work is to evaluate image quality and to estimate mean gl
Res. Biomed. Eng.. Publicado em: 2017-06
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4. Side Lobe Reduction in an X - Band Horn Antenna Loaded by a Wire Medium
ABSTRACT: Through electromagnetic simulation, the present work reports on a comparative study of the enhanced radiation properties of a standard X-band horn antenna loaded by a wire medium. Acting as an artificial dielectric, the wire medium consists of an array of parallel metallic wires installed into the antenna with the wires oriented in the direction of
J. Aerosp. Technol. Manag.. Publicado em: 2015-09
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5. Microclimate and soil moisture in a silvopastoral system in southeastern Brazil
In this study, the microclimate changes in silvopastoral systems are quantified at different time and spatial scales and compared with single-pasture systems. The study was conducted in a silvopastoral system in São Carlos, Brazil (22°01' South and 47°53' West). The silvopastoral system consisted of grass pastures [Urochloa (sin. Brachiaria) decumbens cv.
Bragantia. Publicado em: 2015-03
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6. Relationships of photosynthetic photon flux density, air temperature and humidity with tomato leaf diffusive conductance and temperature
The objective was to study the leaf temperature (LT) and leaf diffusive vapor conductance (gs) responses to temperature, humidity and incident flux density of photosynthetically active photons (PPFD) of tomato plants grown without water restriction in a plastic greenhouse in Santa Maria, RS, Brazil. The plants were grown in substrate and irrigated daily. The
Brazilian Archives of Biology and Technology. Publicado em: 2012-06
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7. Reanálise CFSR-NCEP aplicada ao modelo SiB2 na simulação de fluxos de CO2 sobre o cultivo de soja em Cruz Alta.
The present work aimed to evaluate the behavior of CO2 fluxes, run by the Simple Biosphere Model (SiB2), by adopting CFSR-NCEP data reanalyzed as an atmospheric boundary condition. A statistical analysis was used in order to validate the results obtained using a coefficient for the adjusted model based on the simulation parameters when compared to the data o
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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8. Estudo da eficiência para a ventilação natural dos sheds em hospitais da Rede Sarah / Study of the efficiency of natural ventilation of sheds Sarah network in Hospitals
Natural ventilation in tropical regions is an efficient design strategy for achieving thermal comfort and reducing energy consumption. The utilization of natural resources and climate conditions improves integration of the building with its surroundings and allows comfort conditions through passive systems of conditioning. The effects of wind on a building a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/08/2011
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9. BETWEEN THE CRISIS AND THE NEWS: AIR FRANCES ORGANIZATIONAL STRATEGIES AND THE CONSTRUCTION OF AF 447 OCCURRENCE BY BRAZILIAN AND FRENCH PRESS MEDIA / ENTRE A CRISE E A NOTÍCIA: AS ESTRATÉGIAS ORGANIZACIONAIS DA AIR FRANCE E A CONSTRUÇÃO DO ACONTECIMENTO VOO 447 PELA MÍDIA IMPRESSA BRASILEIRA E FRANCESA
This dissertation studies the strategies of an organization under a crisis situation in the construction of a journalistic occurrence in a mediatized society. There are constant challenges to be overcome by organizations, visibility processes are constantly being changed by new technologies advent, changes in the medias role and the appropriation of their ap
Publicado em: 2011
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10. Modelling evapotranspiration for reference crop and acid lime orchard based on regression and artificial neural network tecniques / Modelagem da evapotranspiração de referência e da evapotranspiração de limeira ácida com aplicação de técnicas de regressão e redes neurais artificiais
The main objective of this study was to test artificial neural networks (ANNs) of multilayer perceptron type (MLP) for estimating reference evapotranspiration, diffusive leaf conductance and crop evapotranspiration of a mature and irrigated citrus orchard. The ANNs were trained under conjugate gradient algorithm. The sigmoid and linear activation functions w
Publicado em: 2010
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11. Accident investigation systems for the general aviation: a comparative analysis / Sistemas de investigação dos acidentes aeronáuticos da aviação geral: uma análise comparativa
Descreve o panorama do surgimento da aviação e das teorias de investigação de acidentes aeronáuticos. Objetivo - Analisar a investigação dos acidentes e incidentes aeronáuticos ocorridos na Aviação Geral no Estado de São Paulo no período de 2000 a 2005 e verificar sua associação a fatores organizacionais. Método - Foram comparadas as atuaçõe
Publicado em: 2009
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12. Interferência de plantas daninhas em características fisiológicas de plantas de mandioca / Weed interference in physiological characteristics of cassava
The objective of this work was to evaluate characteristics associated with photosynthesis and water use in cassava plants in competition with three weed species. For this, experiments were mounted in open environment conditions, with experimental units consisting of fiber glass vases containing 150 dm3 of Red Yellow Latosol, previously fertilized. Treatments
Publicado em: 2009