Signal Conditioning
Mostrando 1-12 de 50 artigos, teses e dissertações.
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1. The effect of anesthetic preconditioning with sevoflurane on intracellular signal-transduction pathways and apoptosis, in a lung autotransplant experimental model
Resumo Justificativa: O pré-condicionamento anestésico atenua a resposta inflamatória durante a lesão de isquemia-reperfusão do pulmão. Os mecanismos moleculares para explicá-lo não são totalmente compreendidos. O objetivo de nossa investigação foi analisar o mecanismo molecular que explica os efeitos anti-inflamatórios do pré-condicionamento a
Rev. Bras. Anestesiol.. Publicado em: 2019-01
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2. A study of strain and deformation measurement using the Arduino microcontroller and strain gauges devices
Abstract This paper presents a methodology for the measurement of strain by means of strain-gauges, where the data acquisition is done by using an Arduino Uno board, due to the low-cost and the easy manipulation of this microcontrollers. The measured signal conditioning is performed by means of a Wheatstone Bridge and then discretized by an Analog-Digital Co
Rev. Bras. Ensino Fís.. Publicado em: 10/12/2018
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3. Sensitive Estrogens Determination in Wastewater Samples by HPLC and Fluorescence Detection
A sensitive high-performance liquid chromatography-fluorescence detection method (HPLC-FLD) was developed and validated for 17β-estradiol (E2) and 17α-ethinylestradiol (EE2) determination in wastewater samples. Sample preparation was performed by solid-phase extraction (SPE) on Hypersep C18 cartridges. Conditioning and elution solvents and sample volume we
J. Braz. Chem. Soc.. Publicado em: 2017-08
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4. Evaluation of rotator cuff muscle strength in healthy individuals
OBJECTIVE: To compare the strength generated by the rotator muscles of the shoulder joint between the right upper limb and left upper limb among healthy individuals. METHODS: To evaluate the muscle strength of upper limbs from isometric contractions in the horizontal direction (rotation) an isometric dynamometer was used, equipped with transducers, signal c
Acta ortop. bras.. Publicado em: 2015-06
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5. Conception, design and development of a low-cost intelligent prosthesis for one-sided transfemoral amputees
Introduction Modern transfemoral knee prostheses are designed to offer comfort and self-confidence to amputees. These prostheses are mainly based upon either a passive concept, with a damping system, or an active computational intelligent design to control knee motion during the swing phase. In Brazil, most lower extremity amputees are unable to afford mode
Res. Biomed. Eng.. Publicado em: 2015-03
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6. Control system for continuous positive airway pressure
INTRODUCTION: Continuous Positive Airway Pressure (CPAP) is a mode of non-invasive mechanical ventilation commonly used in neonatology. The incorporation of new therapeutic and technological advances may impact the survival of very low birth weight preterm infants. However, one of the difficulties faced is the high cost of this device and its numerous add-on
Rev. Bras. Eng. Bioméd.. Publicado em: 2014-06
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7. Espectroscopia ultrarrápida do polímero semicondutor luminescente MEH-PPV com excitação no ultravioleta / Ultrafast spectroscopy of the luminescent semiconducting polymer MEH-PPV with ultraviolet excitation
The optoelectronics industry is currently undergoing a transition period in which inorganic materials are being replaced by organic materials, oligomers and polymers, in the fabrication of some types of devices. However, factors such as low efficiency and low lifetime prevent polymer based devices on entering the market definitely. The solution of these issu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2012
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8. Architecture of a remote impedance-based structural health monitoring system for aircraft applications
The essence of structural health monitoring (SHM) is to develop systems based on nondestructive inspection (NDI) technologies for continuous monitoring, inspection and detection of structural damages. A new architecture of a remote SHM system based on Electromechanical Impedance (EMI) measures is described in the present contribution. The proposed environmen
J. Braz. Soc. Mech. Sci. & Eng.. Publicado em: 2012
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9. Learning processes and the neural analysis of conditioning
Classical and operant conditioning principles, such as the behavioral discrepancy-derived assumption that reinforcement always selects antecedent stimulus and response relations, have been studied at the neural level, mainly by observing the strengthening of neuronal responses or synaptic connections. A review of the literature on the neural basis of behavio
Psychology & Neuroscience. Publicado em: 2010-12
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10. Controle digital de inversores monofásicos com realimentação de estados internos
This work presents a contribution to the study of PWM sinusoidal inverters. It is presented some voltage output control techniques highlighting the advantages and disadvantages. One technique using two feedback loops and compensation by proportional integral compensators, besides showing a natural short circuit protection, is implemented and evaluated by stu
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. CONTRIBUTION TO THE CONTROL OF ELECTRODYNAMIC VIBRATION MACHINES / CONTRIBUIÇÃO AO CONTROLE DE MÁQUINAS DE VIBRAÇÃO ELETRODINÂMICAS
This work presents contributions to the sinusoidal acceleration control of electrodynamic shakers applied in vibration testing. Considering the importance of sine tests to identify critical frequencies of operation and to determine mechanical weakness in the specified performance of specimens, vibration controllers are designed to reproduce the amplitude and
Publicado em: 2009