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Mostrando 1-12 de 330 artigos, teses e dissertações.
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1. Foliar application of molybdenum on cover crops and response of common beans in successive cultivation
ABSTRACT The effects of foliar application of Mo and use of N from cover crops (Crotalaria juncea L. and Canavalia ensiformis (L.) DC) on the performance of common beans were investigated in this study. Field experiments were carried out in a succession planting system (cover crops - common beans), and nitrate reductase activities were evaluated in the labor
Rev. Ceres. Publicado em: 2020-02
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2. Land-use influence on the soil hydrology: An approach in upper Grande River basin, Southeast Brazil
RESUMO A Bacia do Alto Grande (ARG) é responsável pela drenagem de vários rios no sudeste do Brasil, sendo uma região hidrológica de grande importância para o Sistema Elétrico Brasileiro. Portanto, estudos sobre a disponibilidade de água nesta região são indispensáveis para uma melhor tomada de decisão na gestão dos recursos hídricos. O objetiv
Ciênc. agrotec.. Publicado em: 09/12/2019
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3. Clado Mimosoide (Leguminosae e Caesalpinioideae) no Parque Estadual da Serra dos Montes Altos, Bahia, Brasil
Resumo O clado Mimosoide pertence à subfamília Caesalpinioideae, segundo a nova classificação das Leguminosae e inclui espécies tradicionalmente pertencentes à Mimosoideae. O presente trabalho consiste no estudo taxonômico das espécies do clado Mimosoide presentes no Parque Estadual da Serra dos Montes Altos, localizado na porção centro-sul da Bahi
Rodriguésia. Publicado em: 05/12/2019
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4. Evaluation of OFDM Channel Sounding Techniques with Three Modulation Sequences
Abstract This paper presents an evaluation of multicarrier channel sounding techniques using different random and pseudo-random sequences to modulate the OFDM sounding signal. The Random (Rand), Pseudo-Noise (PN) and Zadoff-Chu (ZC) were tested, both in laboratory simulations and in field measurements. For the laboratory simulations Matlab routines were used
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 11/11/2019
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5. Prediction of soil classes in a complex landscape in Southern Brazil
Resumo: O objetivo deste trabalho foi avaliar o uso da seleção de covariáveis por conhecimento especializado no desempenho de modelos de predição de classes de solos em uma paisagem complexa, para identificar o melhor modelo preditivo para o mapeamento digital de solos na região Sul do Brasil. Um total de 164 pontos foram amostrados em campo, com uso d
Pesq. agropec. bras.. Publicado em: 11/11/2019
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6. Anthropogenic Disturbances Affect the Relationship Between Spectral Indices and the Biometric Variables of Brazilian Savannas
ABSTRACT According to previous studies involving biometric variables modeling using remote sensing (RS), data did not consider the effects of anthropogenic disturbance as relevant factor. The main objective of this study was to model aboveground biomass (AGB) and total wood volume (TWV) of Brazilian Savanna biome using vegetation indices (VI) from LANDSAT 5
Floresta Ambient.. Publicado em: 05/09/2019
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7. Weed-removal system based on artificial vision and movement planning by A* and RRT techniques
ABSTRACT. The recent exploration of autonomous robotics tasks in agro-industry has permitted the integration of theories of artificial vision and mobile robotics with tasks in precision agriculture. Artificial vision allows for the classification of weeds and crops from images of plantations. With 3D-image processing systems, the location of the weeds is det
Acta Sci., Agron.. Publicado em: 13/06/2019
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8. Physiological characteristics of citrus plants infested with citrus blackfly
Abstract Aleurocanthus woglumi (Ashby, 1915) is an important agricultural pest that causes yield losses of 20-80% in citrus plants by removing plant nutrients while feeding and allowing the formation of sooty mold. The objective of this study was to evaluate physiological changes in citrus plants in response to A. woglumi infestation under field conditions.
Rev. Bras. entomol.. Publicado em: 13/06/2019
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9. Perfil miofuncional orofacial de pacientes com distúrbios do sono: relação com resultado da polissonografia
RESUMO Objetivo Este trabalho se propõe a caracterizar o perfil miofuncional orofacial de pacientes com distúrbios do sono e relacionar esses com a gravidade do resultado da polissonografia. Método Estudo transversal, de campo, realizado com pacientes encaminhados para polissonografia, com amostra aleatória, composta por pacientes adultos, de ambos os
CoDAS. Publicado em: 06/05/2019
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10. Two-Dimensional Numerical Model of the Fracture Process in Steel Fibre Reinforced Concrete with the Continuum Strong Discontinuity Approach and Functional Data Analysis
Abstract This paper presents the formulation of a two-dimensional numeri-cal model able to describe the fracture process in structural mem-bers of steel fibre reinforced concrete (SFRC) from the volume ratio of the fibres and the mechanical properties of the compo-nents: a concrete matrix and a set of steel fibres with a random orientation. The relationship
Lat. Am. j. solids struct.. Publicado em: 08/04/2019
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11. Usual diet quality among 8- to 12-year-old Brazilian children
Resumo: Inquéritos nutricionais são fontes importantes de informação para políticas públicas no campo da alimentação e nutrição. Seu foco é a identificação de padrões usuais de alimentação, pois desfechos de saúde resultam de consumo de longo prazo. Neste trabalho, nosso objetivo foi avaliar a qualidade da dieta ajustada pela variância diá
Cad. Saúde Pública. Publicado em: 11/02/2019
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12. Spatial and Temporal Potential Groundwater Recharge: the Case of the Doce River Basin, Brazil
ABSTRACT: Little is known about the groundwater recharge potential of weathered tropical catchments, where increasing water uptake is widespread to meet various water demands. This study aimed to estimate the volume of groundwater recharge of the Doce River Basin, Minas Gerais, Brazil. The BALSEQ model was applied to calculate the water balance over a period
Rev. Bras. Ciênc. Solo. Publicado em: 20/12/2018