Instrumentation And Measurements
Mostrando 1-12 de 55 artigos, teses e dissertações.
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1. Compensation technique for environmental and light source power variations applied in a polymer optical fiber curvature sensor for wearable devices
Abstract Introduction Polymer optical fibers (POF) are lightweight, present high elastic strain limits, fracture toughness, flexibility in bend, and are not influenced by electromagnetic fields. These characteristics enable the application of POF as curvature sensor and can overcome the limitations of the conventional technologies, especially for wearable a
Res. Biomed. Eng.. Publicado em: 05/03/2018
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2. Experimental evaluation of the wind effects on an operating power transmission tower
Abstract Static and dynamic effects on power transmission towers can be evaluated by methodologies available in codes, which suggest the use of linear static analysis. By using numerical simulations, it is possible to observe the strong influence of the geometric nonlinear behavior of transmission cables. Dynamic effects also strongly influence this behavior
REM, Int. Eng. J.. Publicado em: 2016-09
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3. CLASSIFICAÇÃO DE ÁGUAS MINERAIS BASEADA EM IMAGENS DIGITAIS OBTIDAS POR SMARTPHONES
This work describes a new procedure for classification of mineral waters based on digital images acquired by smartphones. Commercial waters from eight mineral springs plus distilled water and tap water were combined with eriochrome T black or murexide and transferred to a cuvette, which was positioned into a light controlled chamber. RGB (Red, Blue and Green
Quím. Nova. Publicado em: 2016-08
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4. Exploring the Versatility of an Atomic Absorption Spectrometer: Application to Direct Molecular Determination of Caffeine and Propranolol
A simple strategy using an atomic absorption spectrometer (AAS) for the direct determination of molecular compounds is proposed. The determination of caffeine and propranolol employing atomic absorption instrumentation was conducted, monitoring the emission lines of Fe (271.9 nm) and Mg (285.2 nm), respectively, using a quartz cuvette (1.0 cm) positioned in
J. Braz. Chem. Soc.. Publicado em: 2016-04
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5. Posterior-only spinal fusion without rib head resection for treating type I neurofibromatosis with intra-canal rib head dislocation
OBJECTIVES: Patients with Type I neurofibromatosis scoliosis with intra-canal rib head protrusion are extremely rare. Current knowledge regarding the diagnosis and treatment for this situation are insufficient. The purpose of this study is to share our experience in the diagnosis and surgical treatments for such unique deformities. METHODS: Six patients w
Clinics. Publicado em: 2013-12
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6. FLEXIBLE RISERS MONITORING TECHNIQUE BASED ON VIBRATION MEASUREMENTS / MONITORAMENTO DE RISERS FLEXÍVEIS ATRAVÉS DE TÉCNICA BASEADA EM VIBRAÇÕES
The main failure in flexible risers is the disruption of the wires from the tensile armor layer. Experience has shown that this class of damage occurs primarily near to the top riser connector. The breaking of the wires occurs gradually and may be caused by different processes as corrosion by inflow of fluid in the annular space, excessive wear associated wi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 12/04/2012
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7. Morphometric study of the root anatomy in furcation area of mandibular first molars
Furcation involvement in periodontal disease has been a challenge for the dentist. OBJECTIVE: The aim of this study was to investigate root dimensions in the furcation area of 233 mandibular first molars. MATERIAL AND METHODS: Digital photomicrographs were used to obtain the following measurements on the buccal and lingual surfaces of each tooth: root trunk
Journal of Applied Oral Science. Publicado em: 2012-02
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8. Implementação e análise de medidas de reações por meio de coincidências -partícula / Implementatios and analyses of measurements in reaction using Y-particle coincidents
A reação 18O+110Pd foi estudada utilizando o espectrômetro Y Saci-Perere do laboratório do acelerador Pelletron (LAFN-IFUSP-DFN) numa faixa de energia de 2; 5 a 3; 3 MeV por núcleon. O objetivo foi o estudo do mecanismo de reações nucleares por meio de coincidências Y-partícula, implantando essa técnica e vericando como os efeitos de integração d
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/10/2011
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9. Avaliação da forma do forame apical apos sua patencia e ampliação com instrumentos endodonticos / Morphological study of the apical foramen after patency with endodontic files
The resulting shape of the apical foramens of 48 teeth - 23 lower incisors and 25 upper or lower cuspids - was evaluated after enlargement with 3 or 5 K-type files in root canal treatment performed with radicular access before the crown-down instrumentation technique and followed by serial instrumentation of the canal, with the file going beyond the apical f
Publicado em: 2010
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10. Development of an Acquisition System and Data Analysis for Measurements of Electron Transport Parameters in Gases / Desenvolvimento de sistema de aquisição e tratamento de dados para medidas de parâmetros de transporte de elétrons em gases
This thesis describes a pulsed Townsend experiment whose purpose was to obtain experimentally the transport parameters of electron in gases, particularly nitrogen and isobutane, within a range of reduced electric field between 130 Td and 210 Td. The transport parameters obtained were the average speed of center of mass of the electron cloud, the ionization r
Publicado em: 2010
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11. Análise de veículos para atividades agrícolas por meio do consumo de combustível e torque na tomada de potência
While investing a new tractor that can live up to their demands, the agrobusiness entrepreneur encounters the difficult task of making a rational choice between different models from different manufacturers. The aim of this work is to develop a tool that provides information for the theoretical comparison between demands of torque and power in a tractor fiel
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2010
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12. Tomographic analysis of the apical third of curved canals after endodontic treatment with different automated systems / Análise tomográfica do terço apical de canais curvos após preparo endodôntico com diferentes sistemas automatizados
This study aimed to evaluate through Beam Computed Tomography Volumetric cone (Cone-Beam), transport and the ability to centralize various automated systems. The mesiobuccal roots of maxillary first molars were divided into four groups (n=10) according to the automated systems used: GI - reciprocating with K-file Flexofile, GII - reciprocating with file NiTi
Publicado em: 2009