Transfers Of Energy
Mostrando 1-12 de 53 artigos, teses e dissertações.
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1. NANOMATERIAIS PLASMÔNICOS: PARTE II. QUÍMICA DE COORDENAÇÃO DE SUPERFÍCIE E SUA APLICAÇÃO EM SENSORES E CATALISADORES
In this second part we will discuss how surface chemistry properties of plasmonic nanomaterials can be tailored by applying coordination chemistry, supramolecular and materials chemistry approaches, in which nanoparticles with well-controlled features conjugated with properly chosen molecules are the basis of functional organized structures that can be appli
Quím. Nova. Publicado em: 2020-12
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2. Functional capacity assessment of long-lived older adults from Amazonas
RESUMO Objetivo: Avaliar a capacidade funcional de idosos longevos amazônidas. Método: Estudo epidemiológico, transversal, realizado com 116 idosos com idade igual ou superior a 80 anos, cadastrados em uma Unidade Municipal de Saúde em Belém-Pará, Brasil. Para avaliação da capacidade funcional, utilizou-se a Medida de Independência Funcional (MIF)
Rev. Bras. Enferm.. Publicado em: 05/12/2019
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3. Offshore Energy Harvesting of a Marine Floating Pendulum Platform Model
Abstract This work presents an analysis of an ocean wave energy harvesting system. This system is composed of a direct current (DC) power generator attached at the middle-top of a floating platform. A pendulum is connected to the generator’s shaft. It is considered that the ocean waves motion swings the platform in the vertical direction, which transfers e
Lat. Am. j. solids struct.. Publicado em: 18/02/2019
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4. Investigations on the mechanism and behavior of dynamic energy absorption of metal foam
Abstract Metal foams have been widely used in the engineering fields due to its excellent energy absorption capacity under impact. Under different impact velocities, metal foam exhibits different energy absorption properties. It is important to investigate the mechanism and behavior of energy absorption of metal foam under impact. In this study, a 3D micros
Lat. Am. j. solids struct.. Publicado em: 02/07/2018
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5. Computational Study of Electronic Effects from β-Substituents on the Tautomerism of Naphthazarin Derivatives
In this work, semi-empirical AM1 and DFT B3LYP/6-31G** calculations were applied in the study of the interconversion among tautomers of several naphthazarin and 5-amino-8-hydroxy-1,4-naphthoquinone β-substituted derivatives bearing electron-donor or electron-withdrawing groups. Using a semi-empirical method, detailed potential energy landscapes for proton t
J. Braz. Chem. Soc.. Publicado em: 2017-04
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6. Brazilian Science and Technology Policy and the Case of Embrapa Semiarid
Abstract This study focuses on Brazil’s international co-operation in science and technology (S&T), notably technical transfers to the semiarid branch of the Brazilian Agricultural Research Corporation (Embrapa) from the early 1990s onwards. It is based on interviews with Embrapa personnel, as well as literature and documentary reviews. It starts by outli
Contexto int.. Publicado em: 2016-08
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7. Human thermal comfort: an irreversibility-based approach emulating empirical clothed-body correlations and the conceptual energy balance equation
Exergetic analysis can provide useful information as it enables the identification of irreversible phenomena bringing about entropy generation and, therefore, exergy losses (also referred to as irreversibilities). As far as human thermal comfort is concerned, irreversibilities can be evaluated based on parameters related to both the occupant and his surround
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012-12
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8. Theoretical investigation of electronic excitation transfer between chlorophylls in light-harvesting antenna of photosystem ii using quantum computers
The excitation energy transfer between chlorophylls in major and minor antenna complexes of photosystem II (PSII) was investigated using quantum Fourier transforms. These transforms have an important role in the efficiency of quantum algorithms of quantum computers. The equation 2n=N was used to make the connection between excitation energy transfers using q
Quím. Nova. Publicado em: 2012
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9. Proposta e comparação de um modelo fenomenológico com base em alto transporte de massa e supersaturação para torre de resfriamento de água. / Presentation and comparison of a model based in high mass transfer and supersaturation in a cooling water tower.
Cooling towers are equipment widely used in industrial plants, where these operate under severe conditions such as cooling water inlet temperatures above 50oC. Under this condition, there are high evaporation of water and high mass transfer, generally not considered in performance analysis of a cooling tower. This work presents and analyzes the differences b
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/12/2011
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10. The algorithmic weak stability boundary in earth-to-moon mission design: dynamical aspects and applicability.
This thesis consists of an extensive study of the Weak Stability Boundary (WSB) concept in low-energy Earth-to-Moon mission design within the mathematical structure provided by the Planar Circular Restricted Three-Body Problem (PCR3BP). By employing the patched three-body approach to approximate the Sun-Earth-Moon-spacecraft system, we examine and characteri
Publicado em: 2011
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11. Estudo de parâmetros espectroscópicos de íons de Nd3+ no sistema vítreo SNAB (SiO2 Na2CO3 Al2O3 B2O3) nanoestruturado com nanocristais de CdS
In this work, experimental evidences have been observed for energy transfer from CdS nanocrystals, synthesized by the fusion method, to Nd3+ ions embedded in vitreous substrates (SNAB: SiO2 Na2O Al2O3 B2O3). These dot samples doped with neodymium have been investigated by combined optical absorption (OA), photoluminescence (PL), and time-resolved photolumine
Publicado em: 2010
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12. Sistema de captaÃÃo de energia solar para uma torre de dessalinizaÃÃo tÃrmica com recuperaÃÃo de calor / System of captation of solar energy for a tower of thermal dessalinizaÃÃo with heat recovery
This dissertation presents the experimental result of a system to absorb solar energy to heat up a desalination tower with heat recovery mechanism and a change made in the heated water distribution at the heat storage tank. The system to absorb solar energy consists of solar thermal flat plate collectors for high temperatures and it responsible for the conve
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/09/2009