Energy Estimate
Mostrando 1-12 de 383 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. MATHEMATICAL MODELS FOR ESTIMATING METHANE PRODUCTION IN COVERED LAGOON BIODIGESTERS TREATING PIG MANURE
ABSTRACT Covered lagoon biodigesters (CLB) have been widespread in Brazil in the treatment of pig manure. However, the quantification of biogas production in CLB using mathematical models is still limited and scarce. This study aimed to evaluate and compare six mathematical models—Chen-Hashimoto (Chen, 1983), CETESB (2006), COD Conversion (Chernicharo, 201
Eng. Agríc.. Publicado em: 2021-08
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3. ENERGY STUDY OF A GREENHOUSE AND OPTIMISATION OF THE CHOICE OF SHAPE AND COVERING MATERIAL: BASED ON AN IMPROVED STATIC MODEL
ABSTRACT This paper presents a new approach to properly estimate energy consumption inside a greenhouse. In this study, we have adopted improved classical modelling to evaluate the energy balance of a greenhouse with a higher precision. While the traditional classical model focuses mainly on the cooling and heating (and denies the deep influence of lighting
Eng. Agríc.. Publicado em: 2021-05
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4. Do you think that you eat more than you should? Perception of adolescents from a Brazilian municipality
Abstract Objectives: To estimate the prevalence of the perception of eating more than one should and the associated factors in adolescents, and to analyze differences in dietary indicators according to the perception of overeating. Methods: This is a cross-sectional population-based study with a sample of 912 adolescents, participants of a food consumption
J. Pediatr. (Rio J.). Publicado em: 2021-02
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5. Osteopenia and osteoporosis among treatment-experienced people living with HIV
Abstract Introduction Life expectancy of people living with human immunodeficiency (PLHIV) has increased mainly due to the accessibility and effectiveness of antiretroviral therapy (ART). However, adverse effects from long-term use of antiretrovirals, and the physiological changes associated with aging, may compromise the quality of life of PLHIV, in additi
Braz J Infect Dis. Publicado em: 2020-08
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6. ENERGY POTENTIAL OF BIOGAS FROM PIG FARMS IN THE STATE OF MINAS GERAIS, BRAZIL
ABSTRACT Pig farming stands out as an alternative for decentralized electrical energy production from the use of biogas energy. However, its use is still limited. Thus, this study aimed to estimate and map the biogas production, as well as determine the electric power originated by the use of biogas produced in covered lagoon biodigester from pig farms of di
Eng. Agríc.. Publicado em: 2020-06
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7. Concordance in prediction body fat percentage of Brazilian women in reproductive age between different methods of evaluation of skinfolds thickness
ABSTRACT Objective To assess the utility of bioimpedance (BIA) and skinfolds thickness (SF) in body fat percentage measuring (%BF) compared to the reference method dual-energy x-ray absorptiometry (DXA) in Brazilian reproductive age women, as well as to estimate of inter- and intra-observer precision for SF. Subjects and methods 170 women aged 18-37 year
Arch. Endocrinol. Metab.. Publicado em: 2020-06
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8. Kinetic parameters study for the slow pyrolysis of coffee residues based on thermogravimetric analysis
Thermal decomposition of coffee husks was investigated by thermogravimetric analyses. The proximate, ultimate and composition analyses were performed. Thermogravimetric tests were realized, the material was heated to 1173 K using five heating rates: 5, 10, 15, 20, 25 K min-1. The kinetic parameters were estimated using the methods of Kissinger-Akahira-Sunose
Quím. Nova. Publicado em: 2020-04
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9. Photovoltaic Cell Temperature Estimation for a Grid-Connect Photovoltaic Systems in Curitiba
Abstract The photovoltaic solar energy has been growing in installed capacity worldwide year by year, and Brazil has also been investing in this renewable source of energy generation. The conversion of light into electrical energy occurs in the photovoltaic cells, which are sensitive to the increase of the temperature. A considerable amount of the energy in
Braz. arch. biol. technol.. Publicado em: 25/11/2019
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10. Mathematical models to predict growth, fillet traits, and composition of wild traíra, Hoplias malabaricus
ABSTRACT This study aimed to determine the length-weight relationship and mathematical models to predict dressed and fillet weight and yield and fillet composition of wild traíra, Hoplias malabaricus (Bloch, 1794). A total of 80 marketable-sized fish from 292.28 to 2879.57 g and 32.06 to 61.19 cm were used. The length:weight ratio was estimated using the eq
R. Bras. Zootec.. Publicado em: 25/11/2019
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11. Ultrasound power and irrigation volume in different lens opacity grades: comparison of femtosecond laser-assisted cataract surgery and conventional phacoemulsification
OBJECTIVES: To compare the amount of ultrasound energy and irrigation volume in conventional phacoemulsification cataract surgery versus femtosecond laser-assisted phacoemulsification at different nuclear-cortical cataract grades. METHOD: This was a prospective, consecutive, investigator-masked nonrandomized parallel cohort study. Patients were divided int
Clinics. Publicado em: 28/10/2019
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12. Drying kinetics and mass transfer properties in the drying of thistle flower
Resumo A flor de cardo e, em particular, os seus estigmas, são utilizados para coagular o leite na produção de vários queijos tradicionais portugueses, devido à sua elevada atividade de coagulação, proporcionada pelo elevado teor de proteases aspárticas. O objetivo do presente trabalho foi determinar as propriedades de transferência de massa da seca
Braz. J. Food Technol.. Publicado em: 24/10/2019