Economy
Mostrando 13-24 de 2690 artigos, teses e dissertações.
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13. Flexible pavement with mining waste proposal - execution and analysis of an experimental section
Abstract The extraction of iron ore has a fundamental role in the Brazilian economy. However, such activity generates considerable volumes of waste whose disposal, even if regulated and licensed, has a significant environmental impact. The worldwide concern for sustainable practices along with the urgency for measures to mitigate environmental damage, justif
REM - International Engineering Journal. Publicado em: 2022
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14. Diesel-Like Biofuels Production Using Fatty Waste
According to the waste-to-energy (WTE) valorization and circular economy principles, the use of waste oil and grease (WOG) for obtaining biofuels shows the tendency towards sustainability, makes the interest in green chemistry, and the development of environmentally friendly processes grow. Three different fatty wastes (from the fat trap of a sewage station,
Journal of the Brazilian Chemical Society. Publicado em: 2022
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15. The influence of separately and combined bentonite and kaolinite as binders for pelletization of NaA zeolite from coal fly ash
Abstract Pelletization of zeolitic materials is required to facilitate their practical industrial and commercial applications. Zeolite-NaA was synthesized from fly ash by the fusion method and shaped into spherical granules. Bentonite, kaolinite, and a combination of bentonite with kaolinite were tested as binders with different contents from 5 to 10 wt%. Th
Cerâmica. Publicado em: 2022
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16. Obtainment of a new metal matrix composite from the recycling of UNS S31803 duplex stainless steel by powder metallurgy
Abstract The purpose of circular economy is to maximize resources efficiency. With the increase in consumption of raw materials, energy and waste generation, recycling is necessary for environmental and industrial reasons. Thus, the powder metallurgy, together with mechanical milling, stands as a new method for scraps recycling. This study aimed to produce U
REM - International Engineering Journal. Publicado em: 2022
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17. Can correcting for real exchange rate misalignment help countries escape the middle-income-trap? An analysis of a natural resource-based economy: Chile
RESUMO O Chile é classificado como um país de alta renda, mas sofre das mesmas fraquezas que afetam os países de renda média. As mesmas políticas que estimularam a dependência dos recursos naturais e restringiram a expansão da base produtiva e exportadora, impediram a utilização da política cambial como instrumento de desenvolvimento econômico e s
Brazilian Journal of Political Economy. Publicado em: 2022
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18. CLOROFILA EXTRAÍDA DE RESÍDUO INDUSTRIAL DA ERVA-MATE (Ilex paraguaiensis) UMA POSSIBILIDADE DE ECONOMIA CIRCULAR
Chlorophyll is the most abundant green pigment on the planet, it is unstable and decomposes naturally. Mate-herb is a traditional native plant in the southern region of South America, and its tea is part of the local culture and extractive agriculture. The mate-herb industry generates as a by-product a resinous material rich in chlorophyll whose use is propo
Química Nova. Publicado em: 2022
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19. Analysis of Brazilian public policies related to the implementation of circular economy in civil construction
Resumo A economia circular (EC) vem recebendo cada vez mais atenção em todo o mundo como meio de aumentar a eficiência do uso de recursos, minimizar a geração de resíduos e melhorar o equilíbrio entre economia, meio ambiente e sociedade. É um conceito incipiente e sua implantação está associada, principalmente, ao suporte de políticas públicas.
Ambiente Construído. Publicado em: 2022
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20. A Model of Social Distancing for Interacting Age-Distributed Multi-Populations: An Analysis of Students’ In-Person Return to Schools
ABSTRACT Because of the current scenario of the SARS-CoV-2 (COVID-19) pandemic in Brazil, whose vaccination campaign is in its initial stage, government authorities have pointed towards the complete reopening of the economy. And recently, for the in-personal return of classroom teaching in schools. Given the family relationship, one of the questions that rem
Trends in Computational and Applied Mathematics. Publicado em: 2022
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21. Revisiting the History of Chagas Disease: "Live to tell"
Abstract In 1907, Carlos Chagas was designated to fight paludism in the Rio das Velhas region along the Central do Brasil railroad. During his field research, Chagas discovered a hematophagous insect ( Panstrongylus megitus ) carrying a new trypanosomatide, which he named Trypanosoma cruzi . On April 14th, 1909, he found the same parasite in the blood of a f
International Journal of Cardiovascular Sciences. Publicado em: 2022
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22. A SIR Model with Spatially Distributed Multiple Populations Interactions for Disease Dissemination
ABSTRACT In this contribution we analyze a discretized SIR (Susceptible, Infectious, and Removed) compartmental model, to investigate the role of individual interactions in the spread of diseases. The compartments S i,j , I i , j and R i , j ( i , j , = 1 , 2 , . . . , n ) are spatially distributed in a two-dimensional n × n network. We assume tha
Trends in Computational and Applied Mathematics. Publicado em: 2022
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23. Magnetic concentration route for recovering pellet feed fines stored in a mining dam
Abstract The greatest and noblest challenge of mining engineering for the present and the future of iron ore treatment could be considered as the pursuit of optimizing the use of mineral resources. The use of mining tailings, in the mineral sector itself, or in another industrial branch, meets the needs of circular economy as it increases the useful service
REM - International Engineering Journal. Publicado em: 2022
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24. Economia Circular e Energias Renováveis: uma análise bibliométrica da literatura internacional
Resumo O modelo linear de produção e consumo prejudica o meio ambiente e acelera a escassez de recursos naturais. Em contrapartida, a Economia Circular (EC) surge como modelo que visa manter produtos, componentes e materiais em seu mais alto nível de utilidade e valor o tempo todo. Esta pesquisa busca responder à seguinte questão-problema: como a litera
Interações (Campo Grande). Publicado em: 2022