Applied Optics
Mostrando 1-12 de 46 artigos, teses e dissertações.
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1. Radially Periodic Metasurface Lenses for Magnetic Field Collimation in Resonant Wireless Power Transfer Applications
Abstract In this paper, a new procedure and topology of magnetic metasurface lens are proposed for improving the performance of Resonant Wireless Power Transfer systems. Firstly, three subwave-length unit cells are optimized in order to get negative magnetic permeability in the same frequency, each one with a different refractive index, and they are experime
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. A didactic reformulation of the laws of refraction of light
In this work, an alternative formulation of the laws of refraction of light is presented. The proposed formulation unifies the two established laws of refraction, and it is shown the correspondence between the new and the classic formulations. This new formulation presents a remarkable didactic interest for the conceptual interpretation and resolution of typ
Rev. Bras. Ensino Fís.. Publicado em: 01/02/2018
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3. Effect of laser phototherapy in the prevention and treatment of chemo-induced mucositis in hamsters
The aim of this study was to investigate the effect of laser phototherapy (LPT) in the prevention and/or treatment of oral mucositis induced by 5-fluorouracil (5-FU; Eurofarma, São Paulo, Brazil) in hamsters. Ninety-six hamsters were divided into four groups (n = 24): Control (no treatment); Preventive [LPT from day (D) D-5 to D+5]; Therapeutic (LPT from D+
Braz. oral res.. Publicado em: 11/06/2013
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4. Sistema de sensoriamento a fibra óptica para determinação da concentração de sacarose e etanol aplicado a amostras de usinas sucroalcooleiras / Determination of sucrose and ethanol concentrations by optical fiber sensor applied to samples of sugarcane bioethanol industry
O monitoramento eficiente dos diversos estágios de uma usina sucroalcooleira é uma característica essencial para aprimoramento do processo, minimizando as perdas e garantindo a qualidade dos produtos. Nesta pesquisa, foi desenvolvido um sensor a fibra óptica baseado em refletometria para determinação da concentração de etanol e sacarose, aplicado ao
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/07/2012
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5. THE DEMAND FOR RESIDENTIAL ELECTRICITY IN BRAZIL: 2011-2020 / A DEMANDA POR ENERGIA ELÉTRICA RESIDENCIAL NO BRASIL: 2011-2020
This work aims to quantify the relations between the electricity demand and some of its determinants in the Residential sector of Brazil. To begin with a short discussion is carried out on the Residential energy consumption in the country throughout the last four decades so as to get to know the residential consumption within a wider context. After, we adopt
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/05/2012
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6. ProposiÃÃo de modelo para escolha de rotas urbanas acessÃveis considerando-se os critÃrios de microacessibilidade para as pessoas com deficiÃncia fÃsica motora / Proposal of model for choice of accessible urban routes considering the criteria of microaccessibility to people with physical deficiency motor
The present study is about the accessibility of the transport not-motorized, as walk, having considered criteria established from the concept of Universal Design. In the literature revision, a new referencial theoretical was found and used later as a starting point for the formulation of a method. This was capable to allow the proposal of accessible minimum
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/11/2011
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7. Limits to clinical trials in surgical areas
Randomized clinical trials are considered to be the gold standard of evidence-based medicine nowadays. However, it is important that we point out some limitations of randomized clinical trials relating to surgical interventions. There are limitations that affect the external and internal validity of many surgical study designs. Some limitations can be bypass
Clinics. Publicado em: 2011
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8. Política de Crédito dos distribuidores de combustível na cidade do Rio de Janeiro sob a ótica dos Revendedores. 2010 / Credit policy of fuel distributors in the city of Rio de Janeiro under the optics of the gasoline stations. 2010
The general aim of this dissertation is to analyse the credit policies adopted by fuel distributing companies in the city of Rio de Janeiro (Petrobrás; Shell; Cosan; Ipiranga; Ale; DPPI; Manguinhos; Ello-Puma; Dinamo; Agip) and their respective gasoline stations, including the non-contracted and non-branded ones, throught a questionnaire applied on gasoline
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2010
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9. A Linguagem na formação de Conceitos na sala de aula de física na educação de jovens e adultos
In this research we investigated the meaning making by young and adult students in the discursive interactions in a Physics classroom of Adult Learning Education (ALE) during the development of a teaching sequence of optics entitled Light, Color and Vision. We focus our attention and analysis in the discursive production (both oral and written) between teach
Publicado em: 2010
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10. Simulation of the plasma meniscus with and without space charge using triode extraction system
In this work, simulation of the singly charged argon ion trajectories for a variable plasma meniscus is studied with and without space charge for the triode extraction system by using SIMION 3D (Simulation of Ion Optics in Three Dimensions) version 7 personal computer program. The influence of acceleration voltage applied to the acceleration electrode of the
Brazilian Journal of Physics. Publicado em: 2009-03
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11. Active learning in geometrical optics: experiments and interactive demonstrations. / Aprendizagem ativa em ótica geométrica: experimentos e demonstrações investigativas
There is nowadays consensus among the physics education researchers that the traditional teaching methods are not the most effective in promoting real engagement of the students in the teaching/learning process. Several researchers named Active Learning (AL), methods that require this engagement and research evidences indicate that this approach is the most
Publicado em: 2009
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12. SYNTHESIS AND ANALYSIS OF CIRCULARLY SYMMETRIC REFLECTORS VIA PHYSICAL OPTICS AND FRINGE WAVE CURRENTS / ANÁLISE E SÍNTESE DE REFLETORES CIRCULARMENTE SIMÉTRICOS PELOS MÉTODOS DA ÓTICA FÍSICA E CORRENTES DE FRANJA
The usual algorithms employed in the design of shaped reflector antennas for satellite applications embed an electromagnetic analysis method in an optimization technique. In general, these algorithms demand considerable computation time, limiting its intensive use in the study to explore different sets of specifications and to search for more compact geometr
Publicado em: 2009