Water Spectral Behavior
Mostrando 1-12 de 18 artigos, teses e dissertações.
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1. Elemental concentration via portable x-ray fluorescence spectrometry: Assessing the impact of water content
RESUMO A fluorescência de raios-X portátil (pXRF) pode ser considerada como um dos principais avanços para a caracterização química de diferentes materiais. A umidade das amostras pode afetar o desempenho dessa análise. Assim, foi realizado um ensaio para verificar o efeito da umidade na concentração elementar obtida via pXRF. Como inovação, objet
Ciênc. agrotec.. Publicado em: 27/05/2019
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2. Space-Temporal analysis of suspended sediment in low concentration reservoir by remote sensing
RESUMO O estudo de pequenos reservatórios e com baixa concentração de sedimentos em suspensão (CSS) ainda é um desafio para o sensoriamento remoto. Neste trabalho estimamos a CSS a partir das propriedades óticas da água e de imagens orbitais. Realizamos campanhas em datas escolhidas em função do calendário de passagem dos sensores, sazonalidade das
RBRH. Publicado em: 02/05/2019
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3. Sampling Position under No-Tillage System Affects the Results of Soil Physical Properties
ABSTRACT Understanding the spatial behavior of soil physical properties under no-tillage system (NT) is required for the adoption and maintenance of a sustainable soil management system. The aims of this study were to quantify soil bulk density (BD), porosity in the soil macropore domain (PORp) and in the soil matrix domain (PORm), air capacity in the soil m
Rev. Bras. Ciênc. Solo. Publicado em: 29/04/2016
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4. Assessment of sugarcane harvesting residue effects on soil spectral behavior
ABSTRACT When the harvesting of sugarcane involves a mechanized process, plant residues remain on the soil surface, which makes proximal and remote sensing difficult to monitor. This study aimed to evaluate, under laboratory conditions, differences in the soil spectral behavior of surface layers Quartzipsamment and Hapludox soil classes due to increasing lev
Sci. agric. (Piracicaba, Braz.). Publicado em: 2016-04
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5. RELATIONS BETWEEN THE VARIABLES SPECTRAL AND LIMNOLOGICAL OF DONA FRANCISCA/RSS HYDROELETRIC POWERHOUSE RESERVOIR / RELAÇÕES ENTRE VARIÁVEIS ESPECTRAIS E LIMNOLÓGICAS NO RESERVATÓRIO DA USINA HIDRELÉTRICA DONA FRANCISCA/RS
Os sistemas aquáticos continentais são de fundamental importância para diversas formas de vida. O sensoriamento remoto mostra-se eficaz para o estudo desses sistemas, pois permite o acompanhamento detalhado por meio da utilização de espectrorradiômetros de campo. Inserido neste contexto, o objetivo deste trabalho foi o de analisar as relações entre v
Publicado em: 2010
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6. Microlasers de cavidades estadio aplicados a detecção nanovolumetrica / Stadium cavities microlasers applied to the nanovolumetric detection
This work presents the development of resonant cavities based on chaotic billiard geometries built with semiconductor active optical medium for sensing applications. In spite of the classically chaotic behavior of the stadium, the quantum description of the problem in the semi-classical limit shows unexpected accumulations of the density of probability on cl
Publicado em: 2010
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7. SENSORIAMENTO REMOTO APLICADO AO ESTUDO DO COMPORTAMENTO ESPECTRAL DA ÁGUA NO RESERVATÓRIO PASSO REAL RS / REMOTE SENSING APPLIED TO THE STUDY ON WATER SPECTRAL BEHAVIOR IN PASSO REAL RS RESERVOIR
The building of reservoirs for energy generation and water flow control generated river environmental changes as well as modifications on fluvial environment. In such context, remote sensing is a tool that enables spatial analysis and temporal aquatic environmental information acquisition. This research present a study on water spectral behavior in Passo Rea
Publicado em: 2009
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8. Uso de imagens MODIS no mapeamento de bacias hidrogrÃficas
This research focuses on display applications of MODIS (Moderate Resolution Spectroradiometer) and the different types of its products. The MODIS was design for analysis of changes on a global scale, thus having different environmental applications. This sensor has 36 bands and 44 products for different types of searches. The spatial resolution of MODIS imag
Publicado em: 2009
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9. Análise espectral de padrões-gradiente de séries temporais curtas / Gradient spectral analysis for short time series
With the modernization of data collecting technology, in the time series format, new methodological challenges, for analyzing and interpreting variability patterns, have been growing. In general, such challenges are due to several collecting data problems when they are under extreme environmental variations, data satellite transmission and other inherent ins
Publicado em: 2008
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10. "Study of the interaction between the cationic dye methylene blue and clay particles in aqueous suspension. Migration processes between particles" / "Estudo das interações entre o corante catiônico azul de metileno e partículas de argila em suspensão aquosa. Processos de migração entre partículas."
In the present work, studies on the interaction between the cationic dye methylene blue and clay particles in aqueous suspension are presented, aiming to detect migration processes of dyes molecules between clay particles. Up to now, the interaction between dye molecules and clay particles is described considering mainly two processes, one due to the adsorpt
Publicado em: 2006
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11. Simultaneous determination of cafeic and chlorogenic acids by fluorescence / Desenvolvimento simultanea dos acidos cafeico e clorogenico por fluorencencia
The present work concerns the application of molecular fluorescence and multivariate calibration method, in the PLS-1 modality, for the simultaneous determination of caffeic (CA) and chlorogenic (CGA) acids in synthetic samples and in real samples of aqueous vegetable extracts of Ilex paraguariensis, using the intrinsic fluorescence of both compounds. The de
Publicado em: 2006
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12. Propriedades espectrais das plantas no infravermelho termal (2,5 - 14 um): da química ao dossel. / Spectral properties of plants in the thermal infrared (2.5 - 14 um): from the chemistry to the canopy.
This work explores the thermal infrared spectral properties of plants to evaluate how such data might be used in laboratory, field, and remote sensing studies of ecosystems, and to analyze diverse chemical aspects of plant species. Attenuated total reflectance (ATR) spectra of plant leaves display absorption bands caused by the fundamental molecular vibratio
Publicado em: 2005