Phase Space
Mostrando 1-12 de 501 artigos, teses e dissertações.
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1. Microstrip 3-Bit Fractal-based Phase Shifter
Abstract This paper presents the implementation of a 3-bit microstrip fractal-based phase shifter operating in the 430 MHz to 470 MHz frequency range. The fractal structure is used to confine different delay line lengths in the same area due to the space-filling properties of the used Hilbert fractal curve. The proposed design has three bits corresponding to
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Synthesis and Molecular Modeling Study of Two Bromo-Dimethoxybenzaldehydes
This work describes the synthesis, molecular structure, and packaging of the compounds 6-bromo-2,3-dimethoxybenzaldehyde (6-BRB) and 5-bromo-2,3-dimethoxybenzaldehyde (5 BRB). Characterization in the solid-state was carried out by X-ray diffraction, and the analysis of the interactions was described by the Hirshfeld surface, which helps in understanding the
Journal of the Brazilian Chemical Society. Publicado em: 2022
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3. Evolução da Estrutura Térmica de um Ciclone Tropical e sua Transição Extratropical: Caso Talim
Resumo A comunidade científica por muito tempo considerou a existência de apenas dois tipos de ciclones de escala sinótica em superfície, tropicais e extratropicais, com base nas características de gênese e local de atuação desses sistemas. A metodologia do Cyclone Phase Space (CPS) desenvolvida por Hart, no início da década de 2000, deixou evident
Rev. bras. meteorol.. Publicado em: 2021-06
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4. Blue-Emitting MWO4:Tm3+ (M: Sr, Ba) Phosphors Prepared by Coprecipitation Method at Room Temperature
MWO4 host matrices (M: Sr, Ba) doped with different Tm3+ concentrations (0.02, 0.04, 0.06, 0.08 and 0.10 mol%) have been successfully prepared by the coprecipitation method at room temperature. The as-prepared nanophosphors were characterized by infrared spectroscopy showing intense absorption bands in the range of 700-1000 cm-1 attributed to the symmetrical
J. Braz. Chem. Soc.. Publicado em: 2020-11
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5. Simultaneous determination and difference evaluation of volatile components generated from ginseng fruit by HS-SPME Coupled with GC-MS according to fruit color
Abstract The volatile components of fruits of Panax ginseng C.A. Meyer analyzed to interpret whether fruits color affect volatile components. The volatile components in ginseng fruits cultured with 3 different clolors such as red fruits, yellow fruits and orange fruits were isolated by head-space solid-phase microextraction fiber (polydimethylsiloxane 100 μ
Food Sci. Technol. Publicado em: 2020-09
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6. LABORATORY INVESTIGATION OF X-RAY PHOTOLYSIS OF METHANOL ICE AND ITS IMPLICATION ON ASTROPHYSICAL ENVIRONMENTS
Methanol (CH3OH) is one of the most abundant organic molecules in astrophysical environments. It has been found in cold regions such as surfaces of comets, ices near young stellar objects and protoplanetary disks, as well as in the gas phase in different regions in space. In this work, we experimentally simulate the methanol ice and its behavior when irradia
Quím. Nova. Publicado em: 2020-05
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7. Evaluation of the Influence of the Substituting Cation on the Structural and Morphological Properties of the New Garnet Sm3−xREExFe5O12 (REE = Dy, Gd and Lu)
Rare earth garnets (REE3Fe5O12) have magnetic-electric and optical properties that can be used in transmitters, microwave and data storage devices. These properties depend mainly on partial or total substitution of the cationic sites, as well as by the synthesis method used. Therefore, in this work was studied the influence of the substituting cation on the
Mat. Res.. Publicado em: 20/01/2020
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8. Bioelectrical Impedance Analysis for Monitoring Fluid and Body Cell Mass Changes in Patients Undergoing Cardiopulmonary Bypass
Abstract Objective: To evaluate preoperative and postoperative body fluid distribution with a bioelectrical impedance analyzer in patients undergoing cardiopulmonary bypass. Methods: Fifteen adult patients undergoing cardiopulmonary bypass were included in this study. Total body fluid changes, basal metabolism rates, body fat masses, lean body masses, and
Braz. J. Cardiovasc. Surg.. Publicado em: 13/01/2020
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9. Bioelectrical Impedance Analysis for Monitoring Fluid and Body Cell Mass Changes in Patients Undergoing Cardiopulmonary Bypass
Abstract Objective: To evaluate preoperative and postoperative body fluid distribution with a bioelectrical impedance analyzer in patients undergoing cardiopulmonary bypass. Methods: Fifteen adult patients undergoing cardiopulmonary bypass were included in this study. Total body fluid changes, basal metabolism rates, body fat masses, lean body masses, and
Braz. J. Cardiovasc. Surg.. Publicado em: 2020-01
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10. Sala de espera: uma possibilidade de intervenção em Saúde do Trabalhador
Resumo Introdução Este trabalho relata a experiência da reconfiguração da sala de espera de um serviço público de Atenção à Saúde do Trabalhador vinculado a um Hospital Universitário. Objetivo As ações realizadas tiveram como objetivo transformar o momento de espera em uma oportunidade para o desenvolvimento de ações de educação em saúde
Cad. Bras. Ter. Ocup.. Publicado em: 04/11/2019
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11. Noções de sujeito e poder em leituras foucaultianas e sua influência nos estudos de organizações e gestão de pessoas
Resumo O objetivo deste artigo é refletir sobre a noção de sujeito e poder caracterizada por Michel Foucault (1926-1984), considerando suas três fases intelectuais e suas possibilidades nos estudos de organizações e gestão de pessoas. Argumenta-se que os modos como o sujeito foi caracterizado em suas fases intelectuais reflete os modos como o indivíd
Cad. EBAPE.BR. Publicado em: 22/08/2019
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12. Time-space characterization of droughts in the São Francisco river catchment using the Standard Precipitation Index and continuous wavelet transform
RESUMO Este artigo enfatiza a caracterização espaço-temporal de secas na bacia do rio São Francisco, com base na análise de ondaletas de séries temporais do Índice Padronizado de Precipitação (SPI). Para melhorar a estimação do SPI, os procedimentos para análise regional por momentos-L foram empregados na delimitação de regiões estatisticament
RBRH. Publicado em: 13/06/2019