Power Factor
Mostrando 1-12 de 362 artigos, teses e dissertações.
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1. A 2.4 GHz Coplanar Solar Cell Patch Antenna with a Semi-Analytical Evaluation of Temperature Effects
Abstract Solar cells integrated with antennas have aroused scientific interest as an attractive energy source alternative in low power devices for IoT and Wireless Sensor Network applications. Since the space for all components in the systems is scarce, different integration ideas have been proposed in this field. However, further analysis of the performance
Journal of Microwaves, Optoelectronics and Electromagnetic Applications. Publicado em: 2022
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2. Relational attractiveness between supplier-customer in a supply chain
Abstract Purpose This study aims to evaluate the influence of factors attributed to relationship attractiveness between supplier and customer, from the supplier’s perspective. Design/methodology/approach The empirical exercise was based on the use of multivariate data analysis with confirmatory factor analysis and a partial least squares approach to stru
RAUSP Manag. J.. Publicado em: 2021-03
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3. Thermoelectric properties of barium doped calcium cobaltite obtained by simplified chemical route
Abstract Calcium cobaltite (CCO) thermoelectric ceramics in Ca3Co4O9 and Ca2.95Ba0.05Co4O9 compositions were produced by a simplified chemical route developed in this study. Undoped ceramics sintered at 1193 K for 12 h presented a bulk density equivalent to 77% of the theoretical density, one of the highest values ever found for conventionally sintered undop
Cerâmica. Publicado em: 2021-03
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4. Early maladaptive schemas and harm avoidance as mediating factors between early life stress and psychiatric symptoms in adults
Objective: This study investigated how factors of temperament and early maladaptive schemas predict psychiatric symptoms, as well as how they mediate the relation between early life stress and psychiatric symptoms in adults. Methods: A cross-sectional study was conducted with a sample of 200 university students. Data was collected through a sociodemographi
Braz. J. Psychiatry. Publicado em: 2020-10
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5. EVALUATION OF THE RELATIVE PROTECTION FACTOR OF ROSEMARY EXTRACT IN BIODIESEL IN THE PRESENCE OF TRANSITION METAL IONS
Biodiesel contains unsaturated methyl esters making it susceptible to oxidation reaction. Among the factors that cause oxidative instability is the contamination by transition metal ions that in small quantities catalyze the oxidation reaction. The objective of this work was to evaluate the relative protection factor of rosemary extract, in biodiesel, in the
Quím. Nova. Publicado em: 2020-09
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6. Brazilian Portuguese version of financial risk-taking and tolerance scales: validity evidence within and between measures
Resumo Objetivos Construir e validar uma medida psicológica denominada Escala de Propensão ao Risco Financeiro (FRTakS), e também traduzir, adaptar e validar uma medida psicológica denominada Escala de Tolerância ao Risco Financeiro (FRTolS) em uma amostra brasileira. Evidências de validade interna foram avaliadas com base em análise fatorial explor
Trends Psychiatry Psychother.. Publicado em: 10/01/2020
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7. ENERGY PERFORMANCE IN DISC HARROWING OPERATION IN DIFFERENT GRADIENTS AND GAUGES
ABSTRACT The operational performance of the agricultural tractor can be increased by adjusting parameters such as tire inflation pressure, axle mass distribution and gauge opening, which is a very divergent factor in controlled-traffic production. The objective of the experiment was to measure the energy performance of a 93 kW agricultural tractor in interme
Eng. Agríc.. Publicado em: 09/12/2019
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8. Distribuição espacial dos homicídios na cidade de Belém (PA): entre a pobreza/ vulnerabilidade social e o tráfico de drogas
Resumo A relação entre pobreza/vulnerabilidade social e a violência urbana tem sido objeto de inúmeros estudos no Brasil. Contudo, ocorreu um fenômeno aparentemente contraditório para essa explicação: houve melhoria de vários indicadores sociais no período 2000-2010, mas a incidência de homicídios, indicador fundamental da criminalidade violenta,
urbe, Rev. Bras. Gest. Urbana. Publicado em: 09/12/2019
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9. Correlation of ultrasonography synovitis with disease activity and clinical response to etanercept treatment in juvenile idiopathic arthritis patients
This study aimed to investigate the correlation of ultrasonography (US) of synovitis with disease activity and clinical response to etanercept (ETN) in juvenile idiopathic arthritis (JIA) patients. Eighty-two JIA patients who underwent ETN treatment for 24 weeks were consecutively enrolled. US evaluations of 28 joints (shoulder, elbow, wrist, metacarpophalan
Braz J Med Biol Res. Publicado em: 25/11/2019
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10. Efeitos do Processo de Refusão a Laser na Microestrutura e No Comportamento de Desgaste do Revestimento de WC Aspergido com HVOF
RESUMO O desgaste de componentes e equipamentos industriais e agrícolas representa um grande fator de depreciação de capital e de fonte de despesas com manutenção e reposição de componentes mecânicos. Como o desgaste é um fenômeno essencialmente superficial, envolvendo a remoção mecânica indesejável de material de superfícies, a solução estu
Matéria (Rio J.). Publicado em: 25/11/2019
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11. Development of a multivariable predictive model for postoperative nausea and vomiting after cancer surgery in adults
Resumo Justificativa e objetivos A previsão do risco de náusea e vômito no pós-operatório é a base para a decisão da profilaxia. O escore de Apfel não define por quanto tempo uma pessoa deve se abster de fumar para ser considerada não fumante, e o uso de opioide espinhal intraoperatório como fator de risco para náusea e vômito também não é ab
Rev. Bras. Anestesiol.. Publicado em: 10/10/2019
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12. EFFECT OF DISC-BLADE INTERCEPTING ANGLE ON MIXING PERFORMANCE IN A MULTIPHASE STIRRED VESSEL
Abstract The impeller geometry is a determining factor for mixing efficiency in a stirred vessel. In this study, the effect of disc-blade intercepting angle on power number, just suspended speed and mass transfer coefficient was investigated in a multiphase system under turbulent conditions. The impellers used in this study were fabricated with 3D printing.
Braz. J. Chem. Eng.. Publicado em: 30/09/2019