Interface Detection
Mostrando 1-12 de 94 artigos, teses e dissertações.
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1. Prospects for Developing Low-Cost Optical Fiber Sensors for Liquid-Liquid Interface Detection
Abstract This work examines the prospects of a low-cost retroreflection optical sensor system for detection of the interface between two immiscible liquids, for applications in oil separation tanks. The sensor in its simplest configuration comprises a bare fiber optic tip, cleaved at an angle of 90º relative to the longitudinal fiber axis. The device tested
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Digital version of the Rapid Automatized Naming (RAN): a contribution to early detection of reading problems in children
RESUMO Objetivo: apresentar uma versão digital do teste de Nomeação Automática Rápida (RAN), construído para ser uma ferramenta auxiliar para detectar precocemente problemas de leitura em crianças. Métodos: o aplicativo foi elaborado visando fornecer recursos, como: a) cadastro de indivíduos; b) segurança da informação com o uso do sistema de a
Rev. CEFAC. Publicado em: 08/04/2019
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3. METODOLOGIA PARA DETECÇÃO ELETROQUÍMICA QUALITATIVA DE COMPOSTOS ORGÂNICOS EM INTERFACES PETRÓLEO/ÁGUA
The possibility of detecting some organic compounds directly in a petroleum/water interface was described. Aqueous phase was composed by 1 x 10-3 mol L-1 NaCl solution and the oil phase was carried out using crude oil forming an oil/water interface. Carbon based screen-printed electrodes was used in conjunction with square-wave voltammetry technique, constit
Quím. Nova. Publicado em: 2019-01
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4. Confocal Fluorescence Microscopy and Kinetics of the Cr 3+-Chromate Ion Oxidation Equilibria at the Solid Liquid Interface
Silica-borax pearl samples impregnated with 0.17 and 0.64% Cr3+ were characterized by specific surface area measurements, UV-Vis spectroscopy, energy-dispersive X-ray fluorescence and laser-scanning confocal microscopy. Pearl stability against oxidizing conditions was tested by adding samples to an aqueous hydrogen peroxide solution. The reaction was examine
J. Braz. Chem. Soc.. Publicado em: 2017-09
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5. Detection of movement intention using EEG in a human-robot interaction environment
Introduction : This paper presents a detection method for upper limb movement intention as part of a brain-machine interface using EEG signals, whose final goal is to assist disabled or vulnerable people with activities of daily living. Methods EEG signals were recorded from six naïve healthy volunteers while performing a motor task. Every volunteer remain
Res. Biomed. Eng.. Publicado em: 27/11/2015
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6. Statistical evaluation of a novel SSVEP-BCI stimulation setup based on depth-of-field
Abstract Introduction The main drawback of a Brain-computer Interface based on Steady-State Visual Evoked Potential (SSVEP-BCI) that detects the emergence of visual evoked potentials (VEP) in reaction to flickering stimuli is its muscular dependence due to users must redirect their gaze to put the target stimulus in their field of view. In this work, a nove
Res. Biomed. Eng.. Publicado em: 30/10/2015
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7. Rastreamento em vídeo das características da pupila / Video tracking of pupil features
The study of the pupil s movements has signicant clinical interest because it acts as an objective indicator of retinal sensitivity to light and, consequently, of the optic nerve. Its permanent oscillation is the result of balance between opposing ows of the sympathetic and parasympathetic nervous system. The pupil s state of an individual allows the diagnos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/12/2011
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8. Automation of an analysis system with microvolume porous membrane sampling, capillary electrophoresis separation and contactless conductivity detection for near-real-time monitoring of traces of low-molecular-weight carboxylic acids in air
Um sistema automatizado de análise foi projetado pelo acoplamento de microamostrador difusional baseado em uma membrana capilar microporosa (CMDS) com a separação por eletroforese capilar (CE) e detecção condutométrica sem contato (C4D). O volume interno do CMDS, da ordem de 30 µL, combinado com a demanda de nanolitros dos equipamentos de CE-C4D, levo
Journal of the Brazilian Chemical Society. Publicado em: 2011-11
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9. Development of a flotation-spectrophotometric method for determination of cetylpyridinium chloride in pharmaceutical products
A new simple and sensitive flotation-spectrophotometric method for the determination of cetylpyridinium chloride (CPC) is reported. The method is based on the formation of an ion- associate between CPC and Orange II (OR) which is floated in the interface of aqueous phase and n-hexane by vigorous shaking. The aqueous solution was discarded and the adsorbed io
Química Nova. Publicado em: 2011
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10. Sistema e processo para geração, sincronização remota e comparação de sinais temporais precisos / System and process for the generation, remote synchronization and comparison of precise time signals
This thesis present new proposals for time dissemination systems, which were analyzed and implemented as complete solutions providing high resolution in radio links focusing in the requirements of the new geolocation system known as GEOLOCAL. The solutions found are useful for other applications equiring time synchronization. The work has been developed in d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/07/2010
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11. Detecção de potenciais evocados P300 para ativação de uma interface cérebro-máquina. / Brain-computer interface based on P300 event-related potential detection.
Interfaces cérebro-computador ou Interfaces cérebro-máquina (BCIs/BMIs do inglês Brain-computer interface/Brain-machine interface) são dispositivos que permitem ao usuário interagir com o ambiente ao seu redor sem que seja necessário ativar seus músculos esqueléticos. Estes dispositivos são de extrema valia para indivíduos portadores de deficiênc
Publicado em: 2010
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12. Detecção e rastreamento de íris para implementação de uma interface homem-computador
Este trabalho apresenta uma técnica de detecção e rastreamento de íris para ser utilizada em uma interface homem-computador que permita pessoas com mobilidade restrita, inclusive sem mobilidade nos ombros, possam controlar o cursor do mouse com o movimento dos olhos, sem a necessidade de adquirir equipamentos caros. A única entrada de dados utilizada é
Publicado em: 2010