Electrical Discharges
Mostrando 1-12 de 89 artigos, teses e dissertações.
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1. Spatial and temporal distribution of Gymnorhamphichthys rondoni (Gymnotiformes: Rhamphichthyidae) in a long-term study of an Amazonian terra firme stream, Leticia - Colombia
ABSTRACT Weakly electric fishes continually emit electric organ discharges (EOD) as a means of communication and localization of objects in their surroundings. Depending on water conductivity, the amplitude of the electric field generated is known to increase with decreases in electrical conductivity of the water. In Amazonian terra firme streams, water cond
Neotrop. ichthyol.. Publicado em: 24/10/2019
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2. Nitretação por descargas elétricas da liga Ti-6Al-4V com adição de pó abrasivo SiC ao fluido dielétrico
RESUMO O processo de nitretação que usa Usinagem por Descargas Elétricas é um método que associa a capacidade de usinar superfícies complexas com a obtenção de tratamento termoquímico de nitretação. A fonte de nitrogênio é proveniente da uréia, que compõe o fluido dielétrico juntamente com água deionizada. A liga de titânio Ti-6Al-4V possui
Matéria (Rio J.). Publicado em: 16/09/2019
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3. Sodium Chloride Crystallization by Electric Discharge in Brine
Electrical discharges in liquids are currently used to synthesize nanoparticles. The plasma-liquid interaction is complex, where parameters such as electric field, ion charges and other species present are important. In order to understand the mechanism of crystallization, mother liquor (saturated solution of NaCl, MgCl2 and KCl) was used to study the effect
Mat. Res.. Publicado em: 06/07/2017
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4. Analysis and Comparison of Sensors for Measurements of Partial Discharges in Hydrogenerator Stator Windings
Abstract In order to measure electrical signals produced by partial discharges in hydrogenerators stator windings, capacitive couplers are regularly used. They are electrically connected to the windings and therefore, require undesired insulation intrusion. For avoiding such an intrusion, a microstrip directional coupler is used, which is experimentally and
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2015-12
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5. Efficacy of cognitive behavioral therapy in reducing psychiatric symptoms in patients with implantable cardioverter defibrillator: an integrative review
This article is a systematic review of the available literature on the benefits that cognitive behavioral therapy (CBT) offers patients with implanted cardioverter defibrillators (ICDs) and confirms its effectiveness. After receiving the device, some patients fear that it will malfunction, or they remain in a constant state of tension due to sudden electrica
Braz J Med Biol Res. Publicado em: 18/03/2014
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6. Análise da penetração de umidade em para-raios poliméricos de distribuição / Analysis of moisture ingress into polymeric surge arresters used in distribution energy systems
Sistemas de energia elétrica estão constantemente sujeitos à sobretensões classificadas como internas, decorrentes de operações de manobras e chaveamento no próprio sistema; ou sobretensões decorrentes de agentes externos, por exemplo, descargas atmosféricas. Em ambas as situações, para-raios de óxido de zinco (ZnO) tem sido uma solução eficaz,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/05/2012
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7. Métodos clássicos e alternativos para a análise de dados de fMRI e EEG-fMRI simultâneo em indivíduos assintomáticos, pacientes com epilepsia e com estenose carotídea / Classic and alternative methods for fMRI and simultaneous EEG-fMRI data analysis in asymptomatic subjects, patients with epilepsy and carotid stenosis
O mapeamento das respostas BOLD (Blood Oxygenation Level Dependent) constitui etapa importante nos experimentos de imagem funcional por ressonância magnética (Functional Magnetic Resonance Imaging fMRI) e de EEG-fMRI simultâneo. Em sua grande maioria, a análise de dados de fMRI e de EEG-fMRI está baseada no modelo linear geral (General Linear Model GLM)
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/05/2011
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8. Optical and electrical diagnostics of microdischarges at moderate to high pressure in argon
Microdischarges at moderate to high pressure in argon were investigated. A hole opening diameter of 500 µm direct current (dc) microhollow cathode discharges (MHCD) were characterized by electrical measurements and optical emission spectroscopy (OES) for pressures ranging between 90 and 800 Torr and current from 5 to 20 mA. Current-voltage characteristic cu
Brazilian Journal of Physics. Publicado em: 2010-12
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9. Electric countershock and cold stress effects on liver and adrenal gland
OBJECTIVES: Cold exposure induces glycogen and lipid depletion in the liver and the adrenal gland, respectively. However, no previous study has determined the effects of electrical countershock on those tissues. We aimed to evaluate the effects of electrical countershock on lipid depletion in the adrenal gland and on glycogen depletion in the liver. METHODS:
Clinics. Publicado em: 2010
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10. Uma visão histórico-crítica do conceito de crise não-epiléptica psicogênica / An historical-critical approach to the psychogenic non-epileptic seizure concept
Psychogenic non-epileptic seizures are recurrent crisis, or attacks, or paroxysmal behavioral changes that can be misunderstood as epileptic seizure due to the behavioral similarity between both, however, these manifestations are not associated with abnormal electrical brain discharges that cause epileptic seizures. Non-epileptic seizures are classified into
Publicado em: 2010
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11. Characterization of microhollow cathode discharges
This work is devoted to the study of the electrical characteristics of microhollow cathode discharges (MHCD) at moderate to high pressure in argon and air for different geometries. High-pressure glow discharges can be operated in MHCD devices with µm electrode spacing. Experiments have been performed to determine the so-called Paschen curves, i.e. the depen
Brazilian Journal of Physics. Publicado em: 2009-03
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12. Relationship between physical properties convective clouds and cloud-ground lightining / Relações das propriedades físicas das nuvens convectivas com as descargas elétricas
The knowledge of physical and microphysical properties associated to cloud-ground lightning occurrence is very important for determination of potential forecast parameters of electrical discharges activity. The identification of these parameters could give valuable contribution for different segments of society, such as the sectors of electric energy distrib
Publicado em: 2009