Modulation Techniques
Mostrando 1-12 de 153 artigos, teses e dissertações.
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1. Evaluation of OFDM Channel Sounding Techniques with Three Modulation Sequences
Abstract This paper presents an evaluation of multicarrier channel sounding techniques using different random and pseudo-random sequences to modulate the OFDM sounding signal. The Random (Rand), Pseudo-Noise (PN) and Zadoff-Chu (ZC) were tested, both in laboratory simulations and in field measurements. For the laboratory simulations Matlab routines were used
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 11/11/2019
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2. TRANSCRANIAL DIRECT-CURRENT STIMULATION IN COMBINATION WITH EXERCISE: A SYSTEMATIC REVIEW
RESUMO Introdução A estimulação transcraniana por corrente contínua (ETCC) é uma técnica não invasiva que permite a modulação da excitabilidade cortical e pode produzir alterações na plasticidade neuronal. A aplicação da ETCC tem sido recentemente associada à atividade física. Objetivos Verificar o efeito da Estimulação Transcraniana po
Rev Bras Med Esporte. Publicado em: 11/11/2019
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3. Fire normativities: environmental conservation and quilombola forms of life in the Brazilian savanna
Resumo O artigo busca deslocar a centralidade dispensada à ideia de “controle” no debate sobre manejos participativos do fogo. Para isso, aborda três modos de existência do fenômeno na savana brasileira - queimada, fogo que abre e fogo fora de tempo -, visando explorar as disparidades perceptivas entre os fogos desejados e indesejados junto a quilomb
Vibrant, Virtual Braz. Anthr.. Publicado em: 04/11/2019
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4. Headspace analysis and characterisation of South African propolis volatile compounds using GCxGC–ToF–MS
ABSTRACT Propolis also known as "bee glue or bee resin" is a resinous mixture of bee saliva or bee wax and exudate from tree trunks and flowers, produced by honeybees. The composition of propolis varies depending on the vegetation the bees can access. It is therefore expected that propolis obtained from various localities may have different chemical profiles
Rev. bras. farmacogn.. Publicado em: 26/08/2019
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5. Existe Alteração em Marcadores Inflamatórios em Estudantes de Medicina após Participação em Programa Mente-Corpo?
RESUMO Introdução Estudantes do curso de Medicina estão expostos a carga elevada de estresse, desencadeada por terem que lidar com adoecimento e morte dos pacientes, extensa carga horária, privação de sono, competitividade, cobrança, responsabilidade e medo de errar, entre outros fatores. Algumas técnicas e práticas como a meditação têm sido ut
Rev. bras. educ. med.. Publicado em: 2019-06
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6. Stanozolol promotes osteogenic gene expression and apposition of bone mineral in vitro
Abstract Stanozolol (ST) is a synthetic androgen with high anabolic potential. Although it is known that androgens play a positive role in bone metabolism, ST action on bone cells has not been sufficiently tested to support its clinical use for bone augmentation procedures. Objective: This study aimed to assess the effects of ST on osteogenic activity and ge
J. Appl. Oral Sci.. Publicado em: 08/11/2018
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7. Inhibición de la corrosión del acero ASTM A192 en solución de ácido clorhídrico por el mucilago de Linum usitatissimum
ABSTRACT In this study, the inhibition of the corrosion of ASTM A192 steel in HCl 0,5 M at temperature different, by the Linum usitatissimum mucilage, was investigated using techniques: Tafel extrapolation, linear polarization resistance, electrochemical impedance spectroscopy and electrochemical frequency modulation. The Linum mucilage acts as an optimum co
Matéria (Rio J.). Publicado em: 19/07/2018
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8. Effects of resistance training protocols on nonlinear analysis of heart rate variability in metabolic syndrome
Despite the various standard non-linear measurements used in autonomic modulation (AM) assessments usually being applied to long time-series, such analyses can sometimes be applied to shorter term series. To overcome this disadvantage, chaotic global methods were formulated by putting together heart rate variability (HRV) linear methods. Chaos provides infor
Braz J Med Biol Res. Publicado em: 11/06/2018
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9. Modulation of Physiologic Parameters in Molted Isa Brown Laying-Hens by Glutamine + Glutamic Acid Supplementation
ABSTRACT Feed costs are the main limiting factors in poultry industry and alternative sources of food and/or feed supplements to optimize the bird´s life cycle and to extend their production period need to be explored. This study evaluated morphometric parameters of the small intestine and gonadotropin transcript levels in Isa Brown laying hens supplemented
Braz. J. Poult. Sci.. Publicado em: 2018-04
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10. METABOLÔMICA: DEFINIÇÕES, ESTADO-DA-ARTE E APLICAÇÕES REPRESENTATIVAS
Metabolomics is an emerging and promising omics approach used to understand biological mechanisms. By untargeted and targeted metabolomics analyses, metabolites are determined in biological samples (fluids, cells, tissues, etc.) by comparison of control groups with altered groups, undergoing different therapies, submitted to differing stress levels, dietary
Quím. Nova. Publicado em: 2018-01
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11. Anticonvulsant mechanism of saponins fraction from adventitious roots of Ficus religiosa: possible modulation of GABAergic, calcium and sodium channel functions
ABSTRACT In our previous studies, quantified saponins-rich fraction from adventitious root extract of Ficus religiosa L., Moraceae, showed anticonvulsant effect in acute, as well as chronic mice models of epilepsy. The present study was designed to reveal putative anticonvulsant mechanism of quantified saponins-rich fraction using target specific animal mode
Rev. bras. farmacogn.. Publicado em: 2016-10
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12. Bromelain: Methods of Extraction, Purification and Therapeutic Applications
Bromelain is a concoction of sulfhydryl proteolytic enzymes. Depending upon the site of extraction it can be regarded as either stem bromelain (SBM) (EC 3.4.22.32) or fruit bromelain (FBM) (EC 3.4.22.33). Bromelain remain enzymatic active over a broad spectrumand endure a range of pH (5.5 to 8.0) and temperature (35.5 to 71 ºC). It is one of the extensively
Braz. arch. biol. technol.. Publicado em: 06/05/2016