Specification
Mostrando 1-12 de 1021 artigos, teses e dissertações.
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1. Equipment for Monitoring Synchronous Generators Condition through External Magnetic Field Waveforms
Abstract This paper presents an equipment for monitoring synchronous generators condition through characteristics of the time derivative of the external magnetic field. The developed monitoring methodology allows the identification of established or incipient faults, by detecting changes in the magnetic signature of the synchronous generator. In this methodo
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. PROCESS-BASED ENTITIES ARE RELATIONAL STRUCTURES. From Whitehead to Structuralism
Abstract The aim of this work is to argue for the idea that processes and process-based entities are to be modelled as relational structures. Relational structures are genuine structures, namely entities not committed to the existence of basic objects. My argument moves from the analysis of Whitehead’s original insight about process-based entities that, de
Manuscrito. Publicado em: 2021-03
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3. Isotopic Analysis of Sugarcane/Petroleum Polyethylene Blends: A Perspective on the Application of Stable Isotope Method (δ13C)
In the present work, we propose the application of stable isotope analysis (δ13C) as an auxiliary tool for the inspection of sugarcane/petroleum polyethylene blends. Our results are supported from the analysis of selected samples by accelerator mass spectrometry (14C-AMS). From the results, it was concluded that the δ13C method is suitable to discriminate
J. Braz. Chem. Soc.. Publicado em: 2021-01
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4. Consumo de Oxigênio e Aptidão Cardiorrespiratória | Diferença entre Idade Cronológica e Biológica
Biodiesel made from oils is rich in polyunsaturated fatty acids methyl esters, and, consequently, presents high tendency to oxidize. Biodiesel made from fats, on the other hand, is mainly comprised by saturated chains. Although it is highly stable, they easily crystalize at low temperatures. Blends from both can exhibit optimized properties. In this work, ox
Arq. Bras. Cardiol.. Publicado em: 2020-09
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5. OXIDATIVE STABILITY AND COLD FILTER PLUGGING POINT OF BIODIESEL BLENDS DERIVED FROM FATS AND SOY OIL
Biodiesel made from oils is rich in polyunsaturated fatty acids methyl esters, and, consequently, presents high tendency to oxidize. Biodiesel made from fats, on the other hand, is mainly comprised by saturated chains. Although it is highly stable, they easily crystalize at low temperatures. Blends from both can exhibit optimized properties. In this work, ox
Quím. Nova. Publicado em: 2020-09
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6. ESSENTIAL OIL OF CURCUMA LONGA L. RHIZOMES CHEMICAL COMPOSITION, YIELD VARIATION AND STABILITY
Turmeric (Curcuma longa L.) is a medicinal plant that is cultivated worldwide. This study was conducted to evaluate the variability in the percentage and the chemical composition of volatile oils from 12 turmeric samples. Rhizomes of the turmeric plant were collected from three different producers in the Brazilian like savanna (Cerrado) habitat in the state
Quím. Nova. Publicado em: 20/07/2020
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7. Higher Order Mode Attenuation in Microstrip Patch Antenna with DGS H Filter Specification from 5 to 10 GHz Range
Abstract This work proposes the application of a slot in the ground plane, Defected Ground Structure (DGS), of a microstrip patch antenna. The application of this technique aims to attenuate higher-order excited modes without deteriorating the antenna parameters in the fundamental mode. The methodology for the design of the slot in H-format is presented, bas
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2020-06
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8. Projeto de uma (psico)patologia do sujeito (I): Redefinição do conceito de psicopatologia à luz da questão do sujeito
Este trabalho propõe as bases teóricas para a elaboração de uma nova definição de Psicopatologia , concebendo-a como o estudo dos impasses mórbidos perturbando, ou mesmo impedindo, a realização de um sujeito singular no interior do laço social. A noção de sujeito aqui em questão é aquela decorrente do pensamento psicanalítico de Freud e Lacan.
Rev. latinoam. psicopatol. fundam.. Publicado em: 17/01/2020
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9. Impact evaluation using Difference-in-Differences
Abstract Purpose This paper aims to present the Difference-in-Differences (DiD) method in an accessible language to a broad research audience from a variety of management-related fields. Design/methodology/approach The paper describes the DiD method, starting with an intuitive explanation, goes through the main assumptions and the regression specification
RAUSP Manag. J.. Publicado em: 13/12/2019
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10. Development of a Standard of Solarimetric Stations SONDA
Abstract With the increasing of energy demand in Brazil and the unprecedent popular support for the use of energy sources with low environmental impact, the market for photovoltaic energy has become progressively relevant. Thus, it is of strategic importance to gather information of the solar resources either for a particular location or a specific region.
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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11. Tempo de Voo da Onda Difratada (ToFD) Auxilia na Garantia da Qualidade da Produção de Peças e Estruturas Mecânicas
Resumo A Técnica Tempo de Voo da Onda Difratada (ToFD) é uma técnica de ensaio não destrutivo por ultrassom utilizada para a detecção de falhas e descontinuidades em diferentes componentes, garantindo a qualidade, confiabilidade e segurança. É amplamente utilizada na indústria, principalmente na avaliação de peças e estruturas mecânicas. É lar
Soldag. insp.. Publicado em: 14/11/2019
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12. EVALUATION OF ANTIOXIDANT ACTIVITY OF NATURAL EXTRACTS ON THE OXIDATIVE STABILITY OF COTTONSEED BIODIESEL
Abstract The objective of this study was to evaluate the antioxidant activity of the natural extracts catechin, curcumin and quercetin on the oxidative stability of methylic cottonseed oil biodiesel. The oxidative stability was evaluated using the Rancimat method (EN 14112) for biodiesel with 500, 1000, 1500, 2000 and 3000 ppm of additives, and compared with
Braz. J. Chem. Eng.. Publicado em: 30/09/2019