Publicações - engenharias
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Mariana S G Pereira;
LEAL, DÉBORA ABRANTES;
F M Mor;
Bruno Campos da Silva;
Cláudia Eliana Bruno Marino
Palavra-chave:
inibidor natural;
limoneno;
resistência à corrosão;
técnicas eletroquímicas
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Telecomunicações;
Engenharias; Engenharia de Materiais e Metalúrgica; Metalurgia Física; Corrosão
resumo ...
Volatile corrosion inhibitors (VCIs) are used to protect metal objects temporarily, such as...
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VASCONCELLOS, SOFIA MELO;
Masato kobiyama;
DE ALMEIDA MOTA, ALINE
Palavra-chave:
D-Tank Model;
Soil Water Index
Áreas do conhecimento:
Engenharias; Engenharia Sanitária; Recursos Hídricos; Planejamento Integrado dos Recursos Hídricos
resumo ...
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MARTIOLI, LEONARDO CANIATO;
GOMES, MARIA EDUARDA ALMEIDA;
CASAGRANDE, CÉZAR AUGUSTO;
Marcelo Henrique Farias de Medeiros;
JOCHEM, LIDIANE FERNANDA
Palavra-chave:
durabilidade do concreto;
resíduo de vidro;
concreto armado
Áreas do conhecimento:
Engenharias; Engenharia Civil; Inovação
resumo ...
The growing generation of solid waste, driven by urbanization and industrialization, represents one of today’s greatest environmental challenges. The construction industry can play a key role in this scenario by incorporating recycling and waste reuse practices. Glass, a fully recyclable material, is still largely disposed of in landfills. A promising alternative is the use of ground glass in cementitious materials, partially or completely replacing cement or aggregates. Thus, in this paper, the effect of partially replacing Portland cement with ground glass of different colors including green, blue, transparent, amber, and colorful (all colors used mixed) in proportions of 15 and 35% in mortars was evaluated. The ground glasses were characterized by laser granulometry and chemical analysis. The properties of the mortars were then evaluated in the fresh and hardened state (apparent specific gravity, mechanical strength, water absorption, and open porosity). Regarding workability, the highest improvement observed was 6.8% for the 35% colored glass series compared to the reference series. In terms of entrapped air, there was an increase of up to 18.8% in the 35% green glass series. At 28 days of hydration, the 15% colored glass series obtained a 33% increase in flexural strength compared to the REF series. In the microstructure, it was found that a 15% glass presence was sufficient to reduce the portlandite index from 16.04 to 13.53, while a 35% glass presence was sufficient to reduce it to 7.51% portlandite, equivalent to a 54% reduction, suggesting significant potential for the reaction of the finer glass fractions with portlandite. This study suggests that the use of glass waste in a cementitious matrix can provide an environmentally appropriate alternative for recycling this material, contributing to a sustainable application and increased recycling rates of glass waste.
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BILCATI, GÉSSICA;
Marienne do Rocio de Mello Maron da Costa;
HOLZMANN, HENRIQUE AJUZ;
TAMURA, SARAH HONORATO LOPES DA SILVA
Palavra-chave:
placa cimentícia;
Microfibra de celulose;
microcelulose cristalina
Áreas do conhecimento:
Engenharias; Engenharia Civil; Construção Civil; Materiais e Componentes de Construção
resumo ...
Abstract This study aims to evaluate the potential of cellulose microfiber (FC) combined with...
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Jóse Viriato Coelho Vargas;
SILVA, F.J.S.;
PEREIRA, M.D.;
Martins, L.S.;
SEVERO, I.A.;
MARQUES, C.H.;
ORDONEZ, J.C.;
Andre Mariano;
PARISE, J.A.R.
Palavra-chave:
Exergetic analysis;
exergoeconomics;
Optimal Area Allocation
Áreas do conhecimento:
Engenharias; Engenharia Mecânica; Engenharia Térmica; Aproveitamento da Energia
resumo ...
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MONTEIRO, MICHEL;
GIACOBBO, HELOÍSE;
JUNIOR, NILTON;
HOEPERS, TAIANE;
Daniel Costa dos Santos
Palavra-chave:
gestão integrada das águas urbanas;
Planejamento estratégico;
ïndice de Efetividade;
ciclo urbano da água;
Universalizaçào do Saneamento
resumo ...
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MACIOSKI, GUSTAVO;
Marcelo Henrique Farias de Medeiros
Palavra-chave:
durabilidade do concreto;
fibra ótica
Áreas do conhecimento:
Engenharias; Engenharia Civil; Inovação
resumo ...
Resumo Este estudo investiga a influência do tipo de fibra ótica (G652 e GF1) e do processo de...
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Paula Sacchelli Pacheco;
Sonia Faria Zawadski;
Daniel Eiras
Palavra-chave:
Gas separation membranes;
ZIF-67;
PEBAX MH-1657;
CTAB;
hydrothermal synthesis
resumo ...
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SCAPINELLO AQUINO, LUIZA;
RODRIGUES AGOTTANI, LUIS FERNANDO;
SEMAN, LAIO ORIEL;
Viviana Cocco Mariani;
LEANDRO DOS SANTOS COELHO;
GONZALEZ, GABRIEL VILLARRUBIA
Palavra-chave:
distribuição de energia elétrica;
aprendizado profundo;
Redes Neurais Artificiais;
detecção de falhas
Áreas do conhecimento:
Engenharias; Engenharia Elétrica; Inteligência Artificial;
Engenharias; Engenharia Elétrica; sistemas de potência
resumo ...
Ensuring the reliability of power transmission systems depends on the accurate detection of defects in insulators, which are subject to environmental degradation and mechanical stress. Traditional inspection methods are time-consuming and often ineffective, particularly in complex aerial environments. This paper presents a fault detection framework that integrates the YOLOv8 object detection model with an Adaptive Context Refinement (ACR) mechanism. YOLOv8 provides real-time detection, while ACR incorporates multi-scale contextual information surrounding detected objects to improve classification and localization. The system is evaluated across 25 YOLO model variants (YOLOv8 to YOLOv12) using high-resolution UAV datasets from operational power distribution networks. Results show that ACR improves mean Average Precision (mAP) in all cases, with gains of up to 22.9% for YOLOv10n (from 0.556 to 0.684 mAP) and average improvements of 12.6% for YOLOv10, 8.6% for YOLOv12, 5.6% for YOLOv9, and 4.0% for YOLOv8. The method maintains computational efficiency and performs consistently under varied environmental and fault conditions, making it suitable for the real-time UAV-based inspection of power systems.
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CABRAL, LUCAS LACERDA;
DE CARVALHO, KARINA QUERNE;
BOTTINI, RÚBIA CAMILA RONQUI;
GONÇALVES, ALEXANDRE JOSÉ;
JUNIOR, MILTON MANZONI;
RIZZO-DOMINGUES, ROBERTA CAROLINA PELISSARI;
Marcelo Kaminski Lenzi;
NAGALLI, ANDRÉ;
PASSIG, FERNANDO HERMES;
DOS SANTOS, POLIANA MACEDO
Palavra-chave:
Sorption;
mathematical modeling;
Design of experiments
Áreas do conhecimento:
Engenharias; Engenharia Química; Bioprocessos
resumo ...
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