42 documents found, page 1 of 5
Sustainable lubrication through Gd DLC films and ionic liquids for wear and cor...
Omiya, Takeru; Cavaleiro, Albano; Figueiredo, Nuno M.; Gouttebaron, Rachel; Felten, Alexandre; Ferreira, FábioThis study examines the integration of ionic liquids (ILs) with gadolinium diamond-like carbon (Gd-DLC) films as a means of addressing the environmental drawbacks associated with conventional additives, such as zinc dialkyldithiophosphates. Tribological testing initially revealed that higher concentrations of gadolinium in the DLC resulted in improved wear resistance. Further observation of the wear tracks conf...
Ingestão proteica e perda de peso em indivíduos com sobrepeso ou obesidade
Ferreira, Fábio; Fernandes, António; Pereira, Ana Maria Geraldes RodriguesA alimentação assume um papel central na perda de peso. No entanto, existe a possibilidade de maximizar a eficiência na saúde durante este processo, dependendo da quantidade ingerida de cada macronutriente. Objetivo: Avaliar o efeito da ingestão proteica na perda de peso em indivíduos com sobrepeso e obesidade. Material e Métodos: Foi realizada uma revisão sistemática da literatura, segundo a metodologia PRISMA...
Análise da vulnerabilidade sísmica de um edifício pombalino: desafios e soluções
Ferreira, Fábio; Oliveira, CristinaA verificação da segurança sísmica dos edifícios existentes requer uma abordagem meticulosa que abrange vários fatores, como definir as ações sísmicas apropriadas, modelação adequada, métodos analíticos apropriados e verificações de segurança necessárias. A análise estrutural de alvenaria existentes, com as suas características únicas e conhecimento limitado, representa um desafio. Este artigo descreve a anális...
Influence of 1-Ethyl-3-methylimidazolium Diethylphosphate Ionic Liquid on the P...
Sadeghi, Mohammadamin; Omiya, Takeru; Fernandes, Filipe; Vilhena, Luís; Ramalho, Amílcar; Ferreira, FábioA composite lubricating system that combines solid and liquid lubrication can create a synergistic effect by leveraging the strengths of both types of lubricants. Solid lubrication coatings possess advantageous load-bearing abilities and exhibit low volatility. By adopting this approach, the system retains the merits of solid lubrication while simultaneously harnessing the advantages of liquid lubrication. The ...
User assessment of a customized Taekwondo athlete performance cyber-physical sy...
Cunha, Pedro; Barbosa, Paulo; Ferreira, Fábio; Silva, Tânia; Martins, Nuno; Soares, Filomena; Carvalho, VítorThis study outlines the assessment of the cyber–physical system SPERTA, which was designed to evaluate the real-time performance of Taekwondo athletes. The system conducts performance analyses focusing on speed, acceleration, strength, and identifying and quantifying the athlete’s movements. The research involved administering an online questionnaire to athletes and coaches to evaluate the system’s acceptance a...
User Assessment of a Customized Taekwondo Athlete Performance Cyber–Physical Sy...
Cunha, Pedro; Barbosa, Paulo; Ferreira, Fábio; Silva, Tânia; Martins, Nuno; Soares, Filomena; Carvalho, VítorThis study outlines the assessment of the cyber–physical system SPERTA, which was designed to evaluate the real-time performance of Taekwondo athletes. The system conducts performance analyses focusing on speed, acceleration, strength, and identifying and quantifying the athlete’s movements. The research involved administering an online questionnaire to athletes and coaches to evaluate the system’s acceptance a...
Protein intake and weight loss in overweight or obese individuals
Fernandes, António; Ferreira, Fábio; Pereira, Ana; Fernandes, António; Ferreira, Fábio; Pereira, AnaIntroduction: Food plays a central role in weight loss. However, there is the possibility of maximizing health efficiency during this process, depending on the ingested amount of each macronutrient. Objective: To evaluate the effect of protein intake on weight loss in overweight and obese individuals. Material and Methods: A systematic review of the literature was carried out, according to the PRISMA methodolog...
Assessment of thermomechanical stability of DLC films deposited by Ne-HiPIMS te...
Vahidi, Alireza; Serra, Ricardo; Ferreira, Fábio; Cavaleiro, Albano; Oliveira, JoaoEnhancement of the thermomechanical stability of diamond-like carbon (DLC) coatings is highly demanded by the automotive industry due to graphitization at higher temperatures. This work is devoted to the assessment of the thermomechanical stability of annealed DLC films deposited by increasing Ne up to 50% in high-power impulse magnetron sputtering (HiPIMS) plasma, followed by the evaluation of their tribomecha...
Insights into the oxidation resistance mechanism and tribological behaviors of ...
Ju, Hongbo; Athmani, Moussa; Luan, Jing; Al-Rjoub, Abbas M.K.; Cavaleiro, Albano; Yaqub, Talha Bin; Chala, Abdelouahad; Ferreira, FábioIn the last decades, vanadium alloyed coatings have been introduced as potential candidates for self-lubrication due to their perfect tribological properties. In this work, the influence of V incorporation on the wear performance and oxidation resistance of TiSiN/CrN film coatings deposited by direct current (DC) reactive magnetron sputtering is investigated. The results show that vanadium incorporation signifi...
Tribological Performance of Gd-DLC and Eu-DLC Coatings in the Presence of Synth...
Omiya, T.; Fontes, M.; Vuchkov, T.; Cruz, S.; Carvalho, Albano Augusto Cavaleiro Rodrigues de; Ferreira, FábioThe lubrication of gadolinium-doped diamond-like carbon (Gd-DLC) and europium-doped diamond-like carbon (Eu-DLC) coatings with trihexyltetradecylphosphonium bis(2-ethylhexyl) phosphate ([P66614][DEHP]) ionic liquid (IL) as 1 wt% additive in polyalphaolefin (PAO) 8 was studied. The results of the friction tests under boundary lubrication conditions showed that Gd-DLC and Eu-DLC coatings in the presence of the IL...