Results 1 to 10 of about 127,785 (132)

Balanços energéticos agropecuários: uma importante ferramenta como indicativo de sustentabilidade de agroecossistemas [PDF]

open access: yesCiência Rural, 2004
No Brasil, pouca atenção se tem dado às formas e caminhos com que os fluxos energéticos se distribuem nos sistemas produtivos. Na agropecuária, a atenção tem sido voltada a novas fontes de energia (biomassa) ou em tecnologia alternativa, visando a ...
Alessandro Torres Campos   +1 more
doaj   +4 more sources

La flexibilidad y otros retos de la integración masiva de generación eólica y solar en los sistemas de potencia

open access: yesPrisma Tecnológico, 2022
Con la integración masiva de fuentes de energía renovable, principalmente eólica y solar, la flexibilidad de los sistemas de potencia tiene especial importancia, pues es necesaria para responder a la naturaleza variable e intermitente de estas fuentes ...
Ana Cristina Ríos Melgar   +2 more
doaj   +1 more source

Energy and Exergy (2E) Analysis of an Optimized Solar Field of Linear Fresnel Reflectors for a Conceptual Direct Steam Generation Power Plant

open access: yesEnergies, 2021
Direct steam generation is a promising alternative to conventional heat transfer fluids for solar thermal power plants using linear concentrators because water and steam do not have thermal and chemical stability problems.
Eduardo González-Mora   +1 more
doaj   +1 more source

Enhancing the Photoluminescence and Microstructural Transformations of Al2O3/Glass–Ceramic Composite Coatings by Laser Irradiation

open access: yesApplied Sciences, 2021
This work presents an analysis of the crystallization process and the influence of laser surface modification on the crystalline phases and optical responses of Al2O3/glass–ceramic coatings deposited on a brass substrate. We used a CO2 laser at different
Julio Correa   +8 more
doaj   +1 more source

Comparison of thermal performance between green roofs and conventional roofs

open access: yesCase Studies in Thermal Engineering, 2020
The present study compares the thermal performance of two buildings, one with a conventional roof and another with a green roof. In order to achieve this, a transient mathematical model is developed which considers the heat transfer through the walls and
Marco A. Polo-Labarrios   +4 more
doaj   +1 more source

¿Categoría De Capacidad Aeróbica? O ¿Categoría De Sistemas Energéticos?

open access: yesMovimiento Científico, 2023
Introducción: La guía para la práctica de la fisioterapia desarrollada por la Asociación Americana de Terapia Física, propone evaluar ciertas categorías que podrían afectar el movimiento corporal humano.
Emerson Julian Rincón Castillo   +5 more
doaj   +1 more source

Methodology for an Opto-Geometric Optimization of a Linear Fresnel Reflector for Direct Steam Generation

open access: yesEnergies, 2020
A methodology for an optical optimization of the intercept factor concerning a linear Fresnel reflector is described to increase the amount of solar irradiation that will be delivered in the absorber for Agua Prieta, Sonora; taking the FRESDEMO’s ...
Eduardo González-Mora   +1 more
doaj   +1 more source

Desarrollo de Instrumentos Virtuales en Excel como Apoyo a la Enseñanza de la Metrología

open access: yesTecnología y Ciencia, 2020
La tecnología como medio para la mejora del proceso de enseñanza-aprendizaje, ya sea a través del contacto físico en el aula o laboratorio, o por medio de sistemas virtuales en línea, tiene una potencialidad altamente positiva, haciendo posible ...
Matías Waldino Orué   +2 more
doaj   +1 more source

Barreiras na comunicação e alternativas para auxiliar a compreensão sobre as mudanças climáticas

open access: yesHolos, 2018
O entendimento das causas e riscos das mudanças climáticas e das ações para minimizar os problemas associados a essas alterações é fundamental para conscientizar a sociedade sobre a importância desse aspecto ambiental.
Marjorie Mendes Guarenghi   +3 more
doaj   +1 more source

Análise de oportunidades e desafios para o Nexo Água-Energia

open access: yesDesenvolvimento e Meio Ambiente, 2016
The economic development, the population growth and the urbanization will increase water and energy world demand. As a consequence, the conflict between water resources and energy production will be intensified and the environment will be impacted by ...
Leidiane Mariani   +4 more
doaj   +1 more source

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