Geometrical Optics
Mostrando 1-12 de 19 artigos, teses e dissertações.
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1. Imaging evaluation of hallux valgus
Abstract This work investigates an alternative numerical scheme for the solution of an exact formulation based on Geometrical Optics (GO) principles to synthesize offset dual reflector antennas. The technique is suited to solve a second-order nonlinear partial differential equation of the Monge-Ampère type as a boundary value problem. An iterative algorithm
Radiol Bras. Publicado em: 2020-06
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2. GO Synthesis of Offset Dual Reflector Antennas Using Local Axis-Displaced Confocal Quadrics
Abstract This work investigates an alternative numerical scheme for the solution of an exact formulation based on Geometrical Optics (GO) principles to synthesize offset dual reflector antennas. The technique is suited to solve a second-order nonlinear partial differential equation of the Monge-Ampère type as a boundary value problem. An iterative algorithm
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-06
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3. Comportamento da função renal na crioablação percutânea de massa renal
Abstract This work investigates an alternative numerical scheme for the solution of an exact formulation based on Geometrical Optics (GO) principles to synthesize offset dual reflector antennas. The technique is suited to solve a second-order nonlinear partial differential equation of the Monge-Ampère type as a boundary value problem. An iterative algorithm
Radiol Bras. Publicado em: 2020-06
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4. Hidrodissecção modificada para biópsia guiada por tomografia computadorizada de lesões mediastinais: técnica “marshmallow”
Abstract This work investigates an alternative numerical scheme for the solution of an exact formulation based on Geometrical Optics (GO) principles to synthesize offset dual reflector antennas. The technique is suited to solve a second-order nonlinear partial differential equation of the Monge-Ampère type as a boundary value problem. An iterative algorithm
Radiol Bras. Publicado em: 2020-06
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5. Lentes de gelatina
Resumo Neste trabalho apresentamos um aparato de baixo custo, lúdico e de fácil acesso para experimentação na área de óptica geométrica. A simplicidade da montagem e a facilidade do manuseio favorecem a aplicação deste projeto, que se propõe a construir lentes esféricas com gelatina comestível. Com o auxilio de gabaritos de papel, feitos no forma
Rev. Bras. Ensino Fís.. Publicado em: 11/11/2019
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6. SYNTHESIS AND RIGOROUS ANALYSIS OF OMNIDIRECTIONAL DUAL-REFLECTOR ANTENNAS: THE CASE OF THE MAIN REFLECTOR WITH CIRCULAR GENERATRIX / SÍNTESE E ANÁLISE RIGOROSA DE ANTENAS OMNIDIRECIONAIS DE DUPLO-REFLETORES: O CASO DO REFLETOR PRINCIPAL COM GERATRIZ CIRCULAR
Este trabalho aborda o projeto de antenas omnidirecionais de duplorefletores, onde o refletor principal é obtido a partir de uma geratriz circular. A antena é composta de refletores circularmente simétricos e concêntricos que são alimentados por uma corneta cônica coaxial excitada pelo modo TEM para a produção de polarização vertical. Para realizar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/02/2010
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7. 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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8. O espelho e a janela: as investigações ópticas de Filippo Brunelleschi (1377-1446) e Leon Battista Alberti (1404-1472) para a "costruzione legittima"
Esta pesquisa buscou identificar as contribuições de Filippo Brunelleschi e Leon Battista Alberti para o estudo da óptica geométrica. Tradicionalmente, disputados pelos estudiosos da história da arte e arquitetura como inventores da perspectiva, neste estudo em história da ciência, deixaram-se de lado a questão de genealogia para encontrar, no interi
Publicado em: 2009
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9. Optimum design applied to electrooptic modulators / Projeto ótimo de moduladores eletroópticos
Many design developments involve the optimization of several objective functions. These objective functions are often conflicting with each other and they cannot be simply aggregated into only one function to be optimized. This type of problem is known as the multiobjective optimization problem, for which the solution is a set of points known as Pareto optim
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/02/2008
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10. Projeto ótimo de moduladores eletroópticos / Optimum design applied to electrooptic modulators
Many design developments involve the optimization of several objective functions. These objective functions are often conflicting with each other and they cannot be simply aggregated into only one function to be optimized. This type of problem is known as the multiobjective optimization problem, for which the solution is a set of points known as Pareto optim
Publicado em: 2008
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11. Aplicação de métodos tomográficos na reconstrução bi-dimensional de propriedades de chamas / Application of the tomographyc methods on bidimensional reconstruction of the flame properties
Fundamentally, flame diagnosis by tomographic imaging deals with reconstructing an image from its projections. In the strict sense of the word, a projection at a given angle is the integral of the image in the direction specified by that angle. However, in a loose sense, projection means the information derived from the emitted energies, at some angle, when
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/02/2006
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12. Força optica em pinças opticas : estudo teorico e experimental / Optical force in optical tweezers : theory and experiment
The optical tweezers is an instrument capable of manipulating and trapping dielectric particles through the radiation pressure. Their applications in the life sciences and biophysics increased exponentially after it has been demonstrated that it allowed to microorganisms to be maintained alive trapped for long times. Information obtained from these experimen
Publicado em: 2006