Laser Control System
Mostrando 25-36 de 84 artigos, teses e dissertações.
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25. Construção de uma armadilha magneto-ótica para aplicações em informação quântica e física atômica / Construction of a Magnet-Optical Trap for Aplications at Quantum Information and Atomic Physics
We built a magneto-optical trap (MOT) for rubidium as a first step for the trapping of a cloud of cold atoms in a periodic potential formed by light beams. This system will be used for experiments in atom physics, with possible applications in quantum information. A MOT is necessary to avoid the problems imposed by the thermal agitation of the atoms to the m
Publicado em: 2009
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26. Ação da laserterapia de baixa intensidade (830nm) na regeneração muscular de ratos idosos
The elderly still go through physical changes, especially musculoskeletal disorders such as sarcopenia, changes in central and peripheral nervous system, blood hypoperfusion, regenerative changes contributing to atrophy and muscle weakness, undermining the activities of daily living (AVL). The regenerative process happens about the determination, proliferati
Publicado em: 2009
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27. Evaluation of the effect of the bleaching agent and the subsequent application of sodium fluoride on intra-coronal dentine microhardness / Avaliação do efeito do agente clareador e da subseqüente aplicação de fluoreto de sódio na microdureza da dentina intracoronária
The aim of the present study was to evaluate the microhardness of intra-coronal dentine submitted to bleaching with 38% hydrogen peroxide, photo-activated with LED-Laser and followed by the application of 2% sodium fluoride gel or 5% varnish. Crowns of 45 human maxillary canines were sectioned in the buccal-lingual direction and a sample of 25 mm of internal
Publicado em: 2009
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28. AvaliaÃÃo de tÃcnicas diagnÃsticas de lesÃo de cÃrie proximal: raio X, transiluminaÃÃo com radiaÃÃo infravermelho prÃximo e tomografia por coerÃncia Ãptica
This work was organized in the form of scientific papers to be sent to international journals, specializing in the interface between Physics and Biomedical Dentistry, preceded by an introduction to the topic and literature review. The review of literature in electronic databases, international research on the complexity of advanced methods for early diagnosi
Publicado em: 2009
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29. Desenvolvimento de sistemas de liberação para a administração tópica passiva e iontoforética do minoxidil no tratamento da alopecia androgênica / Development of delivery systems for the topical passive and iontophoretic administration of minoxidil for the androgenic alopecia treatment
Given the hypothesis that polymeric microparticles can penetrate the skin barrier along the transfollicular route, and based on the evidence that iontophoresis is a method that can direct the delivery of drugs to the hair follicles, this work aimed to study the in vitro skin permeation of minoxidil sulfate (MXS), a drug used to treat androgenic alopecia, bot
Publicado em: 2009
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30. An approach to avoid obstacles in mobile robot navigation: the tangential escape
An approach to guide a mobile robot from an initial position to a goal position avoiding any obstacle in its path, when navigating in a semi-structured environment, is proposed in this paper. Such an approach, hereinafter referred to as tangential escape, consists in changing the current robot orientation through a suitable combination of the values of the a
Sba: Controle & Automação Sociedade Brasileira de Automatica. Publicado em: 2008-12
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31. Development of a laser ultrasound detection system for elastic characterization of materials and devices / Implementação de um sistema de detecção laser-ultra-som para caracterização de materiais e dispositivos
The work described herein focuses on the development of an optical system, based on heterodyne Mach-Zenhder interferometry, for detecting ultra-sound (and mechanical microvibrations) in devices and opaque solid materials. Detection of ultra-sound in those devices and materials reveals a variety of important and practical information, such as Elasticity Modul
Publicado em: 2008
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32. Dynamic positioning system based on computer vision and laser. / Sistema de posicionamento dinâmico baseado em visão computacional e laser.
Nos últimos anos, tem se intensificado o desenvolvimento de novas tecnologias para serem aplicadas à veículos submersíveis não tripulados. Uma delas é a visão computacional, que tem o objetivo de extrair informações úteis das imagens captadas do ambiente, podendo ser utilizada como um sensor para o posicionamento do veículo, além de contribuir pa
Publicado em: 2008
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33. Influência de agentes clareadores e ativação por luz sobre a resistência à fratura de dentes humanos hígidos: estudo ex-vivo / Influence of bleaching agents and light activation on the resistance to fracture of sound human teeth: an ex-vivo study
This study evaluated the influence of bleaching agents, photoactivated or not, on the resistance to fracture of sound teeth. Ninety superior incisors were randomly divided into 9 groups (n=10) according to the surface treatment performed on the vestibular face: GI 35% carbamide peroxide, GII - 38% hydrogen peroxide, GIII - halogen light, GIV - LED-laser syst
Publicado em: 2008
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34. Electrophoretic deposition of Ba(Ti0.85Zr0.15)O3 nanoparticles to fabrication of laser sintered ferroelectrics thick films / Deposição de nanopartículas de Ba(Ti0.85Zr0.15)O3 pela técnica de eletroforese para fabricação de filmes espessos ferroelétricos sinterizados a laser
The goals of this work were the implantation and optimization of the technique of sintering by laser scan of thick films, the kinetic study of the process and the evaluation of the physical properties of the laser sintered compound BaTi0.85Zr0.15O3 (BTZ), compared to thick films sintered in conventional furnace. Nanocrystalline powders of BTZ were for the fi
Publicado em: 2008
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35. Estudo do efeito da irradiação com laser em baixa intensidade no metabolismo celular das glândulas salivares e na glicemia de ratas diabéticas induzidas por estreptozotocina / Effect of laser irradiation on cellular metabolism of salivary glands and glycaemic state of diabetic-induced streptozotocin rats
Considering that experimental diabetes alters rat salivary gland morphology and function, the aim of this study was to evaluate the effect of laser irradiation (LI) on the glycaemic state and some biochemical parameters of the parotid glands (PG) and submandibulary glands (SMG) in diabetic and non diabetic rats, which were divided into 8 groups: D0/5/10/20 a
Publicado em: 2008
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36. ReflectÃmetro controlado por computador e sua aplicaÃÃo na detecÃÃo de hidrogÃnio com filmes finos de palÃdio e ouro/palÃdio
This work reports the development and implementation of a computer controlled optical reflectometer and use of the system for characterization of gold, palladium and gold-palladium thin films, with the latter two structures used as transducers for hydrogen detection. The system is designed with several parts actuated by stepper motors with an electronic inte
Publicado em: 2008