Rain
Mostrando 1-12 de 769 artigos, teses e dissertações.
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1. Analysis of Wet Antenna Losses on 11.843 GHz Slant Path in Nigeria and Comparison with Some Tropical Climates
Abstract The amount of water deposits on the receiving dish antenna can cause additional losses and consequently contaminate the actual slant-path attenuation. Only a few research works have been reported in the literature on the measurement of wet antenna attenuation (WAA) and the technique(s) of extracting the losses from the total attenuation in tropical
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Creatinine and purine derivatives excretion and microbial synthesis in lambs fed rain tree pod meal
RESUMO Avaliaram-se os níveis de farinha de vagem de Samanea saman (0, 10, 15, 20 e 25%) em substituição ao milho na matéria seca da dieta sobre o consumo de MS, PB e EM, a excreção urinária de creatinina e de derivados de purina totais e a síntese de proteína microbiana em cordeiros. Foram utilizados 25 cordeiros Bergamácia, não castrados, peso c
Arquivo Brasileiro de Medicina Veterinária e Zootecnia. Publicado em: 2022
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3. Assessment of Total Attenuation and Adaptive Scheme for Quality of Service Enhancement in Tropical Weather for Satellite Networks and 5G Applications in Nigeria
Abstract The dynamic weather condition is a major concern for optimum channel utilization in recent times, especially at higher frequencies with larger bandwidth for 5G applications. Over the years, rain-induced attenuation among the hydrometeors has been linked as the major cause of signal impairment especially at the frequency, f ≥ 10 GHz. However, when
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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4. Organic Matter Leached from Tropical Soils by Simulated Rain, Hard (NaOH) and Soft (NaNO3) Extractions: A Realistic Study about Risk Assessment in Soils
Alkaline extractions from humic material are used to risk assessment in soils. However, there are questions about the type of extraction most suitable for this evaluation. Thus, this work evaluated different soil extractions in search of realistic environmental conditions (simulated rain). The parameters obtained revealed significant differences between the
J. Braz. Chem. Soc.. Publicado em: 2021-03
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5. The dark side of the rain: self-pollination setbacks due to water exposure in Pavonia varians Moric (Malvaceae), a species with rain-dependent flowering
ABSTRACT Plants that occur in arid or semi-arid environments may restrict their flowering to the rainy season to ensure water availability for reproductive functions. However, the exposure of flowers to rainfall can compromise their functionality, such as complex self-pollination mechanisms. We experimentally tested how rainfall exposure affects the sequence
Acta Bot. Bras.. Publicado em: 2020-06
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6. Sugarcane root distribution and growth as affected by genotype and crop cycle
ABSTRACT Sugarcane (Saccharum L. spp. hybrids) is a globally important crop. While roots contribute to its net primary production, knowledge of sugarcane root growth is incomplete and limited in scope. The objective of this study was to determine cumulative root density (LA), root distribution, effective rooting depth (ERD), and root growth rate for four sug
Bragantia. Publicado em: 2020-06
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7. Emerging hotspots of tree richness in Brazil
ABSTRACT We present a summary of floristic variation and distribution of richness of tree and tree-like taxa (i.e., freestanding plants that reach at least 3m in height) in Brazil. We investigated composition patterns throughout phytogeographic domains and vegetation types based on 698,490 occurrence records obtained from the NeoTropTree (NTT) database, and
Acta Bot. Bras.. Publicado em: 2020-03
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8. Hydroelectric Generators Competing in Cascades*
Abstract Hydroelectric generation is the main source of energy production in many countries. When firms operate in the same river, or in cascades, the output of an upstream firm is the input of its downstream rival. We build a dynamic stochastic duopoly model of competition in cascades and show that the decentralized market is inefficient when rain is freque
Rev. Bras. Econ.. Publicado em: 01/01/2020
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9. Bryophyte flora of the Apodi Plateau, Ceará, Brazil
Resumo No estado do Ceará, as principais áreas amostradas com relação às briófitas são constituídas de encraves úmidos e subúmidos, remanescentes da Mata Atlântica. Estudos em áreas de Caatinga são praticamente inexistentes. O presente trabalho objetivou realizar um inventário florístico das briófitas da Chapada do Apodi, dentro dos limites d
Rodriguésia. Publicado em: 20/12/2019
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10. Florística, estrutura e formas de vida do estrato inferior de uma Floresta Ombrófila Densa Aluvial, Pará, Brasil
Resumo Este estudo teve como objetivo descrever a composição florística, a estrutura e as formas de vida do estrato inferior de uma floresta ombrófila densa aluvial na Área de Proteção Ambiental Ilha do Combu, Belém, Pará. Foram selecionadas quatro parcelas de 20 m x 20 m (0,16 ha) divididas em 1.289 subparcelas de 1 m². Foi classificada a categori
Ciênc. Florest.. Publicado em: 02/12/2019
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11. Water balance in soil covered by regenerating rainforest in the Paraíba Valley region, São Paulo, Brazil
Resumo Objetivou-se avaliar o balanço hídrico em Latossolo Vermelho-Amarelo coberto por floresta tropical em regeneração há 30 anos, na bacia do rio Una entre abril de 2016 e março de 2017. Os valores da capacidade de campo (FC) e ponto de murcha permanente (PWP) usados para calcular a capacidade de água disponível (AWC) no solo foi determinado pela
Rev. Ambient. Água. Publicado em: 28/11/2019
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12. Numerical Simulation of Debris Flows of the Catastrophic Event of February 2019 in Mirave - Peru
Resumo Os fluxos de detritos são fenômenos geofísicos provocados por chuvas torrenciais, que ocorrem em áreas montanhosas, e se caracterizam pelo desprendimento de materiais de declives e de leitos de rios e seu consequente arraste água abaixo através de bacias e córregos. Os fluxos de detritos carregam consigo, em geral, lodo, água e rochas, e podem
Rev. Ambient. Água. Publicado em: 25/11/2019