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Comparative analysis between a PEM fuel cell and an internal combustion engine driving an electricity generator: Technical, economical and ecological aspects
(Elsevier B.V., 2014-02-05)
In the recent years the fuel cells have received much attention. Among various technologies, the Proton Exchange Membrane Fuel Cell (PEMFC) is currently the most appropriate and is used in several vehicles prototype. A ...
Electricity, hot water and cold water production from biomass. Energetic and economical analysis of the compact system of cogeneration run with woodgas from a small downdraft gasifier
(Pergamon-Elsevier B.V. Ltd, 2011-06-01)
Wood gasification technologies to convert the biomass into fuel gas stand out. on the other hand, producing electrical energy from stationary engine is widely spread, and its application in rural communities where the ...
Qualidade do gasto público municipal em ensino fundamental no Brasil
(Editora 34, 2012)
Quality of municipal public spending on primary education in Brazil. The focus of this paper was to analyze the relationship between municipal public education spending and students' academic achievement, evaluated according ...
Exploring the effects of import diversification on energy efficiency: Evidence from the OECD economies
(2022-04-01)
This study aims to unveil the heterogeneous impacts of import product diversification and institutional factors for achieving energy efficiency in Organization for Economic Co-operation and Development (OECD) countries. ...
Investment recovery period in electric motor of higher efficiency in pumping for irrigation
(Associação Brasileira de Engenharia Agrícola (SBEA), 2013-04-01)
Neste trabalho, ajustou-se um modelo matemático para quantificar o efeito do rendimento do motor elétrico sobre os custos de um sistema de bombeamento para irrigação na estrutura tarifária de energia elétrica convencional ...
Barreras individuales, financieras y sociales del emprendimiento turístico femenino.
(Escuela Superior Politécnica de Chimborazo, 2017-12-10)
This paper analyzes the barriers of female entrepreneurship in the tourism sector in a sample of efficiency driven economies, according to the World Economic Forum. By means of a comparative analysis between men and women ...
Economic-statistical design of the (X)over-bar chart used to control a wandering process mean using genetic algorithm
(Pergamon-Elsevier B.V. Ltd, 2012-12-01)
This research considers the process mean wanders according to a first-order autoregressive model. During the in-control period the process mean wanders around its target value, and after the assignable cause occurrence, ...
Análise econômica da eficiência da produção de cana-de-açúcar de fornecedores do Estado do Paraná
(2012)
The sugarcane industry has been important in the Brazilian economy since the colonial period. The search for alternative energy sources has gained more prominence, by offering a product generating clean energy. With the ...
Comparison of four trap types for ambrosia beetles (Coleoptera, Scolytidae) in Brazilian Eucalyptus stands
(Amer Entomol Soc, 2000-12-01)
Eucalyptus spp. plantations represent >60% of the reforested area in Brazil. Although ambrosia beetle attacks on live trees were at first nonexistent, they have begun to appear with greater frequency. Monitoring for pest ...
Economic viability of the piaucu Leporinus macrocephalus (Garavello & Britski, 1988) production
(Universidade de São Paulo (USP), 2004-03-01)
Brazilian fish farms presented an accelerated development during the early 90's, mainly because of the increase in fee-fishing operations. To meet the demand of this market, fish production and supply became excessive and, ...