Lower Circuit
Mostrando 1-12 de 78 artigos, teses e dissertações.
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1. Short Circuit and Recovery Time Tests in a helical bifilar R-SFCL module
Abstract Superconducting Fault Current Limiter (SFCL) modules with distinct arrangements have been investigated, seeking design and performance enhancements. In this context, this work aims to propose a design for resistive SFCL (R-SFCL) modules, using RE-Ba-Cu-O high-temperature superconducting tapes (HTS) wound on an alternative support material. An R-SFCL
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2021-06
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2. Evaluation of Mass Loss in Different Stages of Printed Circuit Boards Recycling Employed in Temperature Controllers
The aim of this work was to evaluate mass loss in each stage of the recycling process for metal recovery from PCBs of controllers and temperature indicators of cold chambers. The stages of process consists of grinding, particle size classification, magnetic and electrostatic separation. It was analyzed 13 kg of PCBs. These PCBs were crushed and ground. The g
Mat. Res.. Publicado em: 02/12/2019
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3. HPGR as alternative to fused alumina comminution route: an assessment of circuit simplification potential
Abstract A considerable portion of energy consumption and, as a consequence, operational costs in mineral processing, is associated with comminution. High Pressure Grinding Rolls (HPGR) are appealing for their energy efficiency and resulting lower operating costs. This article evaluates this technology as an alternative to the conventional fused alumina comm
REM, Int. Eng. J.. Publicado em: 19/06/2019
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4. Estudo de recobrimentos de silicato e aluminato obtidos por oxidação por plasma eletrolítico em liga de alumínio
RESUMO As ligas de Alumínio são utilizadas para diversas finalidades e para a maioria dos casos a superfície desses materiais precisa ser modificada a fim de se melhorar propriedades como resistência ao desgaste e corrosão. Neste cenário, o processo de oxidação por plasma eletrolítico (PEO) surge como uma alternativa viável para produção de recob
Matéria (Rio J.). Publicado em: 20/05/2019
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5. Boas práticas na prevenção de pneumonia associada à ventilação mecânica
Resumo Objetivo: Avaliar a adesão dos profissionais de saúde a um conjunto de boas práticas de prevenção de Pneumonia Associada à Ventilação Mecânica, índice de conformidade às medidas individuais e associação de características clínicas dos pacientes e adesão ao conjunto de boas práticas com a pneumonia. Métodos: Estudo de coorte prospec
Acta paul. enferm.. Publicado em: 2019-02
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6. Caracterización electroquímica de películas de óxido de zinc obtenidas por anodizado en medio alcalino
ABSTRACT Zinc Oxide is a material of particular interest because of its unique optical and electrical properties, which are explored for many applications in optoelectronics and nanoelectronics; and it that can be synthesized economically by the technique of anodization. In this work, the potentiostatic anodization technique was used in dilute NaOH solution,
Matéria (Rio J.). Publicado em: 19/07/2018
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7. Comparative evaluation between mechanical and pneumatic cells for quartz flotation in the iron ore industry
Abstract Flotation plays a relevant role in the concentration of iron ores. Conventional flotation technology employing mechanical machines and columns and also circuits combining both types of cells have been utilized in the iron ore industry. The top size of particles in the flotation circuit feed is 150 µm and the slimes below 10 µm are removed as overf
REM, Int. Eng. J.. Publicado em: 2018-07
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8. AVALIAÇÃO DA ADSORÇÃO E ESTUDO ELETROQUÍMICO DE CÉLULAS SOLARES PRODUZIDAS COM TiO2 E CORANTE EXTRAÍDO DO HIBISCUS
Dye-sensitized solar cells using natural dyes have lower cost when compared to ruthenium-based dyes. This paper aims to evaluate, electrochemically, solar cells composed of TiO2 with dye extracted from the Hibiscus(var. Sabdariffa) and propose an adsorption model capable of predicting the adsorption mechanism of the dye on the semiconductor surface. The char
Quím. Nova. Publicado em: 2018-05
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9. Low cost system to measure active power in electrosurgical units
Abstract Introduction: The real-time measurement of active power delivered to patients during the electrosurgical act is still an engineering challenge. Besides, there is no electrosurgical unit on the market capable of doing it according to the normative requirement. Methods This work presents the design of an electronic structure capable to probe the ele
Res. Biomed. Eng.. Publicado em: 09/11/2017
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10. Corrosion Behavior Analysis of Plasma-assited PVD Coated Ti-6Al-4V alloy in 2 M NaOH Solution
The work aims the study of the corrosion behavior of nitride plasma-assisted PVD coated Ti-6Al-4V alloy in 2 M NaOH at 25 and 60°C, using open-circuit potential (OCP) versus time measurements, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The uncoated Ti-6Al-4V alloy showed a passive behavior. The TiN and TiAlN/TiAlCrN coate
Mat. Res.. Publicado em: 06/02/2017
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11. Perception of effort monitors internal load during compounded circuit training
Abstract The aim of this study was to determine if rating of perceived exertion (RPE) could be used to monitor the internal load during compounded circuit training (CCT) sessions in women. Thirteen young adults women performed three sessions of CCT varying the intensity according to participants' maximum heart rate (50, 70 and 90%HRmax). Throughout the main
Motriz: rev. educ. fis.. Publicado em: 2016-03
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12. Rectangular notch loaded dual band annular ring patch antenna
In this article, a dual band annular ring patch antenna is theoretically investigated using the equivalent circuit concept.Two symmetrical rectangular notches are etched in radiating ring patch with respect to feed point. It is observed that the resonant frequency is directly proportional to the notch width and notch length. The bandwidth of the antenna at l
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2014-06