Engenharias: Últimas Submissões
Resultados 21-30 de 2398
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Influence of chemical nature of citric and tartaric acids on reaction time of the crosslinking of polyvinyl alcohol hydrogels
(2024) [Artigo de periódico]Poly(vinyl alcohol) (PVOH) is a water-soluble polymer having a hydroxyl group as a functional group contributing to excellent membrane-forming and mechanical performance. PVOH is obtained by the hydrolysis of polyvinyl ... -
Quantifying power system frequency quality and extracting typical patterns within short time scales below one hour
(2024) [Artigo de periódico]This paper addresses the lack of consideration of short time scales, below one hour, such as sub-15-min and sub-1-hr, in grid codes for frequency quality analysis. These time scales are becoming increasingly important due ... -
Estudo preliminar do processo de anodização de alumínio com licor pirolenhoso em modos galvanostático e potenciostático pela técnica de Hard Anodization
(2023) [Artigo de periódico]A técnica de Hard Anodization foi desenvolvida para otimizar o processo de anodização porosa de alumínio, gerando altas taxas de anodização, com crescimento acelerado e organizado da camada de óxido aliando altas tensões ... -
Evaluation of thermal decomposition kinetics of poly (lactic acid)/ethylene elastomer (EE) blends
(2023) [Artigo de periódico]The influences of ethylene-based elastomer (EE) and the compatibilizer agent ethylene-butyl acrylate-glycidyl methacrylate (EBAGMA) on the thermal degradation of PLA/EE blends were evaluated by the thermal degradation ... -
Incorporation of organic acids in the crosslinking of polyvinyl alcohol hydrogels
(2023) [Artigo de periódico]This work studied the incorporation of organic acids as crosslinking agents and reaction time on the properties of poly(alcohol vinyl) (PVOH) hydrogels to act as scaffold systems to compounds incorporated into agriculture ... -
Organic-inorganic films with anticorrosive and bactericidal properties for titanium implants
(2023) [Artigo de periódico]This study seeks to synthesize, by the sol-gel method, an organic-inorganic hybrid coating of polyurethane, siloxane and silver nanoparticles to cover titanium prostheses, aiming to act as an anticorrosive protection ... -
Project risks and regulation in transport infrastructure : a study in Brazilian agencies concessions planning process
(2024) [Artigo de periódico]Concession of transport assets has been widely adopted in transport infrastructure projects to improve efficiency. In developing countries, e.g., Brazil, many concessions have been conducted with the goal of contributing ... -
Comparison of two progressive damage models for predicting low-velocity impact behavior of woven composites
(2024) [Artigo de periódico]This research focuses on comparing the two progressive damage models available in the explicit nonlinear finite element software LS-Dyna. To explore the prediction capabilities in terms of mechanical response and dominating ... -
Hidratação na idade inicial de cimentos contendo ye’elemita (YCC) produzidos com catalisador gasto (SFCC)
(2024) [Artigo de periódico]Diante dos impactos ambientais associados à produção do cimento Portland convencional, o estudo de cimentos especiais de reduzido impacto ambiental tem sido uma tendência. Neste contexto, os cimentos contendo ye’elimita ... -
Improving the wear resistance of high chromium cast iron through high entropy alloys concepts and microstructure refinement
(2023) [Artigo de periódico]High Chromium Cast Iron (HCCI) has demonstrated its effectiveness as a potential material for applications in severe environments due to its remarkable wear resistance attributed to the volumetric fraction of carbides in ...