Materials Literature
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Purpose. Development of the quasi-analytical method of nonlinear differential equation solution and its approbation with reference to beams of variable cross-section on the elastic base with two base factors.Methods of researches. Required function, taking into account its assumpted form, can be approximated by some k…
Purpose. Ensure the mechanical, technological and operational properties of parts made of structural aluminum alloys (AlSi5, AlMg5) for aviation purposes grown by the additive method using wire (WAAM).Research methods.To accomplish this goal, it was necessary to solve the following tasks: to obtain blanks of serial pa…
In this paper the regularising properties of the Kachanov-Rabotnov type continuum damage constitutive model are studied using a simple one-dimensional dynamic problem. It is found that the width of the localisation zone is independent of the mesh size if the loading rate is below a certain threshold value.
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We report an experimental and theoretical study of the low-temperature specific heat C and magnetic susceptibility chi of the layered anisotropic triangular-lattice spin-1/2 Heisenberg antiferromagnets Cs2CuCl4-xBrx with x= 0, 1, 2, and 4. We find that the ratio J'/J of the exchange couplings ranges from 0.32 approxim…
Using copolymers materials in the preparation of dental fillings is now more common as a result for needs for more esthetic materials of filling and the international ban on the use of products that contain mercury, amongst others dental amalgams. On the other hand, a disadvantage with the Dental Nanocomposites is tha…
Nitrogen, in both liquid and gaseous states, has been established as an effective technical medium for fire prevention and risk mitigation in industrial systems handling flammable liquids and gases. Its ability to displace oxygen and create inert atmospheres has enabled its progressive adoption in sectors such as Oil…
Nitrogen, in both liquid and gaseous states, has been established as an effective technical medium for fire prevention and risk mitigation in industrial systems handling flammable liquids and gases. Its ability to displace oxygen and create inert atmospheres has enabled its progressive adoption in sectors such as Oil…
A espectroscopia Raman Intensificada por Superfície (SERS) é uma técnica que combina ultra-sensibilidade analítica com a riqueza de informações característica de espectroscopia vibracional, e consiste na análise de sistemas em que a molécula de interesse se encontra adsorvida sobre um substrato: em geral, nanopartícul…
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Scale deposition phenomena can be encountered in various oil and gas production systems, including onshore and offshore pipelines, complex equipment like safety valves, Christmas trees and other subsea production equipment. In order to study the mechanism of scale deposition in pipes, an experimental loop was develope…
H2-based technologies are an efficient alternative for producing sustainable energy. Fuel cells are electrochemical devices that work with pure H2. Industrially, reforming of fossil fuels is the most used technology for obtaining hydrogen, however, the synthesis gas derived has an inappropriate CO content. The CO-PROX…
In numerical analysis of crashworthiness ship structures scenarios it is common to use dense uniform refinement in the collision zone, requiring a high computational time. To reduce this expense, a methodology called the non-local adaptive mesh refinement method (MMA-N) was developed, which uses refinement indicators…
Bioactive molecules are chemical molecules which produced by living organism that exert a biological effect on other organisms. Dimethyl 1-H Benzotriazole Monohydrate (DMBM) has been performed by the basis set of B3LYP/6-31(d,p) using DFT. Global minimum energy of 5,6 Dimethyl 1-H Benzotriazole Monohydrate is -551.095…
The current state of two gathering gas pipelines was analyzed in the article: the first – from the gas gathering station (GGS) of the Narizhnianske oil and gas condensate field (OGCF) to the complex gas treatment unit-2 (CGTU-2) of the Yuliivske OGCF; the second – from the CGTU-1 of the Skvortsivske OGCF to the CGTU-2…
A RESOLUTION TO COMMEND THE LSU STUDENT HEALTH CENTER AND STUDENT HEALTH CENTER EXECUTIVE DIRECTOR, D’ANN MORRIS FOR PROPERLY USING STUDENT FEES IN ITS OPERATIONS AND SERVICES
[[abstract]]The thermal character of ultrathin silica (SiO2) nanowires was studied by molecular dynamics simulation, whose structures have been predicted in our previous study. Eight structures including two-, three-, four-, five-membered ring structures (2MR, 2MR-20, 3MR-30, 4MR-40, and 5MR50), 4MR-3facet, 4MR-4facet…
A universal calculation model for theoretical description of structural and physicochemical properties of aqueous solutions of modified silicates with the involvement of complexing agents is offered. The model takes into consideration three types of equilibrium: acidic-basic, metal-complex and, for silicate oxygen ani…
Researchers' interest in the CoxFe3-xO4system has grown significantly over the past decades. This is due to the use of cobalt ferrite for the manufacture of high-frequency devices, in magnetic resonance imaging, biotechnology due to the high magnetocrystalline anisotropy, high coercivity and moderate saturation of the…
Diversos fatores podem influenciar o tempo de vida útil dos alimentos, promovendo, por exemplo, o crescimento de microrganismos, assim como alterações no sabor, na cor e na textura dos alimentos. A incorporação de sensores de monitorização de oxigénio e pH em embalagens alimentares permite que estas sejam classificada…