Optical Correction
Mostrando 1-12 de 40 artigos, teses e dissertações.
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1. Glaucoma de ângulo fechado devido a síndrome de íris em platô
Resumo Objetivo: Descrever um caso de glaucoma de ângulo fechado devido a síndrome de íris em platô. Descrição do caso: Paciente do sexo feminino, de 50 anos de idade, que há 13 meses foi tratada de fechamento angular primário a esquerda com sucesso com iridotomia periféria com Nd:YAG laser, compareceu ao serviço com queixa de embaçamento visual
Rev. bras.oftalmol.. Publicado em: 04/11/2019
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2. Adaptive Modulation and Code Strategy to Reduce Energy Consumption in Elastic Optical Network
Abstract In this paper, the novel Adaptive Modulation and Code (AMC) algorithm aims to reduce energy consumption in elastic optical network is developed. The proposed AMC algorithm adaptively allocates both, the appropriate modulation and the forward error correction (FEC), according to the actual physical distance and the optical signal to noise ratio (OSNR
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2018-03
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3. Sinais de fundo em análise instrumental: uma discussão essencial em cursos de graduação
Understanding instrumental analysis is essential for obtaining reliable analytical results required by chemists in a variety of research areas and industrial activities. All instrumental techniques involve undesirable background (BG) signals originated either from concomitants in the sample or by spurious (e.g. electrical or optical) effects intrinsically re
Quím. Nova. Publicado em: 2017-02
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4. A robust fully automatic lumen segmentation method for in vivo intracoronary optical coherence tomography
Abstract Introduction: Intravascular optical coherence tomography (IVOCT) is an in-vivo imaging modality based on the introduction of a catheter in a blood vessel for viewing its inner wall using electromagnetic radiation. One of the most developed automatic applications for this modality is the lumen area segmentation, however on the evaluation of these me
Res. Biomed. Eng.. Publicado em: 05/02/2016
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5. Problemática da correção óptica em escolares: acesso, comparecimento, necessidade e uso de óculos / Optical correction issue in schoolchildren: access, attendance, need and use of spectacles
INTRODUÇÃO: A falta da correção óptica recentemente foi reconhecida como importante causa de baixa visão e parece ser um problema fácil de ser resolvido com o uso de óculos. No entanto, a falta da correção óptica é um problema complexo do seu diagnóstico ao tratamento, envolvendo a procura e alcance da assistência médica, além da confecção
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
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6. Análise dos resultados de ceratectomia fotorrefrativa com mitomicina C e LASIK para correção miópica. / Analysis of photorefractive keratectomy with mitomycin C and LASIK results for myopic correction.
Objetivos: Comparar os resultados de acuidade visual, refração estática, aberrometria e sensibilidade ao contraste em olhos com miopia moderada submetidos à ceratectomia fotorrefrativa (PRK) com mitomicina C (MMC) ou à ceratomileuse assistida por excimer laser in situ (LASIK) em cirurgias guiadas por frente de onda durante acompanhamento de um ano. Aval
Publicado em: 2010
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7. Visual impairment secondary to congenital glaucoma in children: visual responses, optical correction and use of low vision AIDS
INTRODUCTION: Congenital glaucoma is frequently associated with visual impairment due to optic nerve damage, corneal opacities, cataracts and amblyopia. Poor vision in childhood is related to global developmental problems, and referral to vision habilitation/rehabilitation services should be without delay to promote efficient management of the impaired visio
Clinics. Publicado em: 2009
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8. Modelagem de redes CDMA-PON baseadas em técnicas de cancelamento paralelo e códigos corretores de erros / Modeling of CDMA-PON networks using parallel interference cancellation and error correcting codes techniques
The advent of new services offered to end users, such as the so called triple play, which consists in the simultaneous traffic of voice, video, and data through the same communication infrastructure, has been pushing telecom operators towards providing adequate bandwidth as well as quality of service. This has brought the spotlight to passive optical network
Publicado em: 2009
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9. Calculations Properties Elements of Methanol Molecule Including Vibrational Corrections Correlation and Electronic / Calculos de Propriedades Eletricas da Molecula de Metanol Incluindo Correções Vibracionais e Correlação Eletrônica
In this work we report results for the polarizability, and rst and second hyperpolarizabilities of the methanol molecule including vibrational corrections and electron correlation eects. The Vibrational corrections were computed using the perturbation theoretic approach of Bishop and Kirtman and the electron correlation eects were taken into account through
Publicado em: 2009
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10. Calculos de Propriedades Eletricas da Molecula de Metanol Incluindo Correções Vibracionais e Correlação Eletrônica / Calculations Properties Elements of Methanol Molecule Including Vibrational Corrections Correlation and Electronic
In this work we report results for the polarizability, and rst and second hyperpolarizabilities of the methanol molecule including vibrational corrections and electron correlation eects. The Vibrational corrections were computed using the perturbation theoretic approach of Bishop and Kirtman and the electron correlation eects were taken into account through
Publicado em: 2009
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11. Study and compensation of bias drift, scale factor stability and linearity of a conditioning and sign processing circuit of an interferometric fiber optic gyroscope / Estudo e compensação da deriva termica, estabilidade do fator de escala e lineariazação de um circuito de condicionamento e processamento de sinais de girometro interferometrico a fibra optica
Fiber Optic gyroscopes are an important part of inertial navigation systems. To meet the necessary specifications required for application in inertial systems, it is mandatory that the electronic Sagnac demodulator uses state of the art devices. The proposal of this work is to study and develop a technique to correct all together for the nonlinearities, the
Publicado em: 2009
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12. Perfil morfofuncional de pacientes com retinopatia diabética som baixa acuidade visual severa em hospital público de referência em diabetes no Brasil
Objective: To demonstrate the morpho-functional profile of the evaluation of patients with diabetic retinopathy without low severe visual acuity in a public hospital of reference in endocrinology, determining in this sample, the relation between the time of diabetes, age and visual acuity with the retinal thickness measured by the optical Coherence tomograph
Publicado em: 2008