Navegando por Assunto "Urban solid waste"

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Acesso aberto (Open Access)
Desafios e oportunidades para o acesso universal à energia elétrica na Amazônia
(Universidade Federal do Pará, 2015-02-20) MUNIZ, Rafael Ninno; ROCHA, Brigida Ramati Pereira da; http://lattes.cnpq.br/9943372249006341
The Brazilian energy planning has been progressively emphasizing the use of renewable energy sources, however for some initiatives such as the Light for All Program, these energy alternatives are being treated as a secondary activity and difficult to implement. This work aims to analyze how the Brazilian government has been adapting its institutional structure, technology and funding to provide universal access to electricity in remote areas. According to official information, this initiative has proven effective in its first phase, which was developed by the extension of conventional network. However, the study concludes that the program is currently not converges to full compliance with the access to electricity in remote areas in the Amazon and three main challenges were identified. There is a need for adjustment of current institutional structures, harmonize technologies to the regional context and use government funds more effectively. The research points out ways and alternatives to what is being done in isolated systems, and presents two case studies which have been applied to decentralized power generation with renewable sources of biomass in isolated community, and the energy utilization of municipal solid waste in the municipality belonging to the isolated system. These practical examples are proposed to contribute to the results of the study for the development of public policies, research projects, meet technology providers and promote energy and residuary solutions for municipalities and communities belonging to national isolated system, aiming to achieve universal access to energy electricity in remote areas in the Amazon.
Acesso aberto (Open Access)
Estimativa Volumétrica de Resíduos Sólidos Urbanos em Imagem de Visualização Única.
(Universidade Federal do Pará, 2024-09-02) AZANCORT NETO, Júlio Leite; FRANCÊS, Carlos Renato Lisboa; http://lattes.cnpq.br/7458287841862567
Efficient solid waste management is crucial for keeping the city clean and sustainable. This work presents a methodology that uses well-established algorithms for volume estimation in urban solid waste management from single-view images. The proposed system is based on state-of-the-art computer vision concepts and models, including instance segmentation, depth estimation, and volume calculation based on point clouds. The methodology demonstrated the ability to accurately estimate the volume of both individual and multiple solid waste objects in images. We evaluated our approach using real-world data. Despite challenges such as manual rescaling of distances and limited datasets, our system shows considerable potential for refinement and improvement, targeting complex scenarios like real urban environments. Numerical results indicated that the proposed system is promising even in complex scenarios, with mean absolute percentage errors (MAPE) of 8.60% for single waste and 9.23% for multiple wastes, resulting in an overall average of 8.91%. The coefficient of determination was 95.11% for single instances and 87.64% for multiple instances. The proposed methodology significantly contributes to the advancement of management technologies in smart cities.