Materials Literature
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Over the past few years, food safety has become a hot topic of research due to the rapid rise in foodborne diseases. Consumption of food contaminated with pathogens or toxins has caused numerous fatal health incidents worldwide. Biosensing platforms capable of early detection of food contaminants with high specificity…
This paper presents a nonlinear calculation method for unbalanced magnetic force (UMF) in surface-mounted permanent magnet (SPM) machines based on subdomain and magnetic circuit hybrid model (SMCHM). The hybrid model transforms the nonlinearity effect in stator core to equivalent current on the edges of slots. The cur…
This paper shows the effectiveness of the microelectronic strain gage sensors application, the expediency of the energy-information method using for sensor modeling with the purpose of automating the synthesis of their physical operation principle is proved, an energy-information model of the bridge circuit has been d…
Reversible SERS-active sensing assays made from plasmonic nanoparticles encapsulated in biocompatible matrices have potential as long-term implantable sensors. These assays are encapsulated in "free" form within microdomains bounded by polyelectrolyte multilayers (PEMs), permeable to the target but impermeable to prot…
Os bronzes com alto teor de estanho (20-25 wt.% Sn) são usados na fundição sineira desde a antiguidade. O uso de uma liga com 4 partes de Cu para uma parte de Sn foi proposto como o mais adequado em termos de resistência mecânica e reverberação sonora já no séc. V a.C. na China Antiga. Desde então, esta tem sido a lig…
This paper deals with the computational efficiency related problem appearing in electric power systems adequacy assessment using Monte-Carlo method. When using this method, it is necessary to calculate the steady state for every state from a set of randomly generated states of the simulated system. This task refers to…
Abstract—The cause and the mechanism of formation of a long crack in a linear oil-trunk pipeline section consisting of two longitudinal pipes 1220 mm in diameter made of low-alloy 17G1S steel are comprehensively studied. The length of the crack moving along the longitudinal weld exceeds 3 m. The chemical composition a…
The article developed a mathematical model for calculating the electromagnetic parameters of inductors of special types, for example, inductors with an intermediate conductive medium, inductors-transformers, inductors for heating cylindrical surfaces, when the length of the detail considerably exceeds the length of th…
Abstract—An approach, which is based on modified phenomenological models of the rheological behavior of metallic materials under superplasticity conditions, is proposed to describe the grain size distribution during superplastic flow with allowance for grain refinement. The characteristic features of experimental grai…
Abstract— Metallothermic SHS in conditions of artificial gravity was numerically modelled for the 3NiO + 2Al → Al2O3 + 3Ni reaction taken as an example. The process was assumed to include (a) high-temperature combustion reaction yielding liquid products, (b) their gravity-assisted separation, and (c) cooling down. In…
Abstract—A technique of ultrasonic action on ring-shaped titanium nickelide samples, which stimulates the shape memory effect, is described. The possibility of ultrasound-induced operation of ring-shaped force elements is shown.
A number of technologies have been proposed over the years to prepare nano and micro structures and systems for the detection of molecular targets in liquids. Among these technologies, electrochemical etching of silicon has increasingly attracted attention for high-sensitivity (bio)sensing, due to its peculiarity of e…
In this work, we have shown that betagallium oxide (Ga2O3) thin films of differing thickness could be obtained by physical vapor deposition method, employing proper annealing conditions. These enable us to compare the variation of optical properties like transparency, band gap in these phases. Apart from these, our an…
The VIS-SWIR photosensing properties of Ge and GeSi NCs embedded in TiO2films are investigated. For this, we deposit GeTiO2and GeSiTiO2films, respectively by magnetron sputtering and then we perform rapid thermal annealing (RTA) for Ge NCs and GeSi NCs formation, respectively. Raman studies and spectral photocurrent m…
Electrical properties of a single verticallyoriented n-ZnO nanorod on a p-GaN substrate are investigated by measuring their current-voltage characteristics. The current-voltage characteristics are measured using nanoprobe in the high vacuum chamber of a scanning electron microscope. The observed changes of the resisti…
Algorithms for calculating the stress-strain state and residual stresses under complex loading are presented in this article. Residual stresses in the material affect the life and reliability of electromechanical equipment, so they should be taken into account in practical calculations. The presented algorithms allow…
In this paper, we demonstrate the effect of poly (lactic acid) surface modification by collagen native fibrils deposition on cell growth. Amount of cells was estimated by the fluorescence microscopy and MTT assay. The effect of hydrophilicity and the presence of collagen fibrils, as well as the importance of the colla…
In this study we show an approach to the synthesis of a new L-arginine grafted peptide-like biodegradable polymer. The compound is capable of decomposing in vivo into the initial monomeric molecules due to: sensitivity to the redox potential of the medium (disulfide bonds are present) and presence of enzyme labile pep…
In this study, CdS films prepared using the technique of pyrolysis spray at the glass and Si wafer with a thickness of 300 nm using Cadmium Acetate Cd (CH3COO)2·2H2O with purity of 99.6% and Thiourea (CS(NH2)2) with purity 99.6%. These compounds are used as the sourced materials of Cd+2 and S-2 ions, respectively for…
The applications of nano-core materials with doped external shell by para-amino-benzoic acid to construct an organic transistor are presented. The transistor adopts a typical configuration of an organic transistor, but using point contacts as a pseudo-MOS transistor. The device is prepared by Ag deposition on a glass…