Abstract: Carbon fiber-reinforced polymers (CFRP) are extensively applied in the automotive and aeronautic industry due to several advantages that combine resistance properties with the weight reduction of components. The fiber reinforced thermoset composites are generally manufactured in components close to the final dimensions, and, therefore, need to be machined to Leia mais…
Resumo: Em telecomunicações, cabos, conectores e adaptadores desempenham um papel crucial para o funcionamento eficiente das redes, inclusive em tecnologias sem fio como o 5G. A escolha e o uso adequado do tipo de conexão também são vitais para a integridade dos dispositivos e para a garantia da qualidade do Leia mais…
Abstract: This paper presents the effects of Niobium additions (1, 2 and 3%) on the wear resistance and impact properties of Hadfield steels (1.2%C and 12-18%Mn). The additions of Nb promoted a significant decrease in the mass losses, from 79 mg (Hadfield steel with 12%Mn) to 33 mg (Hadfield steel Leia mais…
Abstract: This article examines the impact of the air-fuel ratio, measured by lambda probe, and the ignition timing on the indicated efficiency of an internal combustion engine using biogas as fuel. Through analysis, it’s seen that the indicated efficiency increases as the air-fuel ratio leans towards a stoichiometric value, and Leia mais…
Abstract: This article examines the effects of charge, engine speed, ignition timing, and air-fuel ratio on the temperature of exhaust gases when using biogas as fuel. The effects of varying engine operating conditions on exhaust gas temperature are analyzed. The article discusses whether increasing engine charge and engine speed leads Leia mais…
Abstract: This article investigates the effects of intake manifold pressure and engine speed on the volumetric efficiency of an internal combustion engine. The study also examines the impact of biogas and different temperatures on volumetric efficiency. Through analysis, it’s verified if the volumetric efficiency of the engine decreases when using Leia mais…
Abstract: The O&G production corrosion challenges are not static phenomena. Fluid characteristics change over time, resulting in systems becoming less predictive for corrosion mitigation programs. Thus, carrying out specific studies aimed at understanding the corrosion mechanisms is constant in this sector, especially for offshore environments. Even though, few studies of Leia mais…
Abstract: Occupational exposure to toxic elements can adversely affect health. The current study evaluated blood concentrations of potentially toxic elements (PTE) including As, Cd, Cr, Cu, Hg, Mn, Ni, Pb, Sb, Sn, and Zn in formal and informal workers. Additionally, the study investigated the associations between blood PTE concentrations and Leia mais…
Resumo: A tecnologia LoRa – Long Range permite a comunicação sem fio de dados a longas distâncias com baixo consumo de energia, alcançando até 15 quilômetros em condições ideais, e variando de 3 km a 4 km em áreas urbanas e até 12 km em áreas rurais. Ideal para aplicações Leia mais…
Abstract: Green briquette is an iron ore agglomerate produced by cold agglomeration process for use as metallic burden in blast furnaces and direct reduction reactors, creating flexibility for the steel market. This product benefits CO2 reduction at mining and steel mills. The presence of sodium in the composition of the Leia mais…
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