Radio Frequency
Mostrando 13-24 de 191 artigos, teses e dissertações.
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13. Analgesic effects of a capacitive-resistive monopolar radiofrequency in patients with myofascial chronic neck pain: a pilot randomized controlled trial
RESUMO ANTECEDENTES: Até a data, há uma falta de estudos prévios para tratar a dor no pescoço por radiofrequência (RF) monopolar capacitiva resistiva. O objetivo deste estudo foi investigar o efeito imediato da radiofrequência monopolar capacitiva resistiva (RF = 448 kHz) versus placebo em (1) redução da intensidade da dor no pescoço em pontos de g
Rev. Assoc. Med. Bras.. Publicado em: 2019-02
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14. Savitzky-Golay Filter for Denoising Lung Sound
ABSTRACT For computerized analysis of respiratory sounds to be effective, the acquired signal must be free from all the interfering elements. Different forms of noise which can degrade the quality of lung sounds are recording artifacts, power line/Radio Frequency (RF) interferences, ambient acoustic interferences, heart sound interference etc. Such interfere
Braz. arch. biol. technol.. Publicado em: 29/11/2018
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15. Physical Properties of Sputtered Indium-doped ZnO Films Deposited on Flexible Transparent Substrates
Indium-doped zinc oxide (IZO) polycrystalline thin films were grown on polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and as reference on 7059 Corning glass substrates at room temperature by radio frequency magnetron sputtering from a target prepared with a mixture of ZnO and In2O3 powders. The structural, optical, and electrical propertie
Mat. Res.. Publicado em: 06/09/2018
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16. Apresentando um novo modelo para controle de acesso de veículos de carga rodoviária em portos brasileiros por meio da tecnologia de identificação por radiofrequência
Resumo Este artigo apresenta um estudo com vistas à criação de um modelo para o controle de acesso e também para a otimização do embarque de cargas nos portos brasileiros. O presente artigo visa apoiar a minimização de deficiências de acesso aos portos e também otimizar as taxas e custos de embarque, por meio da utilização de um algoritmo para c
urbe, Rev. Bras. Gest. Urbana. Publicado em: 16/07/2018
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17. Minimum Activation Power of a Passive UHF RFID Tags: a Low Cost Method
ABSTRACT: RFID is an automatic contactless identification method based on radio frequency (RF). The reading process depends of the power of electromagnetic signal received by a tag. Thus an accurate characterization of RFID tags is crucial for early adopter in aerospace industry. The present study shows the preliminary approach to characterize the reading di
J. Aerosp. Technol. Manag.. Publicado em: 07/05/2018
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18. ELECTRONIC MONITORING SYSTEM FOR MEASURING HEART RATE AND SKIN TEMPERATURE IN SMALL RUMINANTS
Abstract The electronic monitoring of physiological responses is essential for managing animal production systems considering market demands for animal welfare. The objective of this study was to design, build, and test an electronic monitoring system, with recording and wireless transmission capability, for measuring the heart rate and skin temperature in s
Eng. Agríc.. Publicado em: 2018-04
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19. Redução de perdas nas cadeias de frutas e hortaliças pela análise da vida útil dinâmica
Resumo A estimativa do crescimento populacional mundial de nove bilhões de pessoas, em 2050, estabelece um grande desafio para os próximos anos, considerando os problemas atuais de insegurança alimentar e o fornecimento de alimentos saudáveis, num mundo, predominantemente, de pessoas vivendo em regiões urbanas. A importância da dieta na saúde é indis
Braz. J. Food Technol.. Publicado em: 05/02/2018
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20. Sputtering Power Induced Physical Property Variation of Nickel Oxide Films by Radio Frequency Magnetron Sputtering
NiO thin films were deposited on Si and Corning 1737 glass substrates using radio frequency (rf) magnetron sputtering system. The physical properties of NiO films under different sputtering power were thoroughly studied. The XRD results indicated that as-prepared NiO films with the sputtering power above 100 W developed only (200) preferred orientation. The
Mat. Res.. Publicado em: 01/02/2018
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21. Controle de obras por RFID: sistema de monitoramento e controle para equipamentos de segurança no canteiro de obras
Resumo É relevante o papel da Tecnologia da Informação e Comunicação (TIC) aplicada à cadeia produtiva da construção, em particular na gestão de equipamentos de segurança, cujas práticas convencionais de controle têm mostrado eficiência limitada. Sendo assim, este trabalho apresenta o estudo do desenvolvimento de um sistema de monitoramento e co
Ambient. constr.. Publicado em: 2017-12
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22. Determination of Selenium in Bovine Semen by ICP-MS Using Formic Acid for Sample Preparation
Determination of Se by inductively coupled plasma mass spectrometry (ICP-MS) can be difficult due to spectral interferences; however, these interferences can be eliminated by using collision-reaction interface (CRI) technology. A simple and fast procedure for determination of total Se concentration in bovine semen by ICP-MS after sample solubilization with d
J. Braz. Chem. Soc.. Publicado em: 2017-12
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23. Assessment of radio frequency heating on composition, microstructure, flowability and rehydration characteristics of milk powder
Abstract Radio frequency heating (RFH) provides higher efficiency and more uniform heating zone compared with conventional method. The aim of present work is to evaluate the effect of RFH (at 90 °C for 5 or 10 min) on the changes in composition (protein oxidation and fat distribution), microstructure, flow characteristic and rehydration property of infant m
Food Sci. Technol. Publicado em: 30/10/2017
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24. Recurrent Algorithm for TDOA Localization in Sensor Networks
ABSTRACT: Using the mathematical apparatus of the extended Kalman Filter, the recurrent algorithm of the passive location in sensor networks - based on the Time Difference of Arrival method in case of correlated errors of measurements - is developed. The initial estimates of Radio Frequency Sources coordinates and the correlation matrix of the vector estimat
J. Aerosp. Technol. Manag.. Publicado em: 02/10/2017