Materials Literature
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Electrical machines that are produced in mass production suffer from stochastic deviations introduced during the production process. These variations can cause undesired and unanticipated side-effects. Until now, only worst case analysis and Monte Carlo simulation have been used to predict such stochastic effects and…
Abstract Pillarenes (or pillararenes), as a new and rapidly developing class of covalent macrocycles, have stimulated a tremendous upsurge of interest in supramolecular chemistry because of their unique features and potentials in fabricating functional materials. In addition, metallo‐supramolecular chemistry has grown…
Abstract The development of a phenol formaldehyde/graphene (PF-graphene) composite coating with high performance is desirable but remains a challenge, because of the ultrahigh surface area and surface inertia of the graphene. Herein, we synthesized PF-graphene composites by thein situpolymerization of phenol and forma…
In this study polyethersulfone ultrafiltration membrane were prepared with the modifier gelatin at 0, 5, 10, 15 and 20 wt % using DMF as solvent by phase inversion process. Morphologies and characteristics of the membranes were investigated through the methods of SEM, XRD, contact angle measurements. The performance o…
Methane (CH4), ethylene (C2H4), acetylene (C2H2), propane (C3H8), iso-butane (i-C4H10), and trimethylamine [N(CH3)3] have been investigated as precursors for intentional carbon doping of (0001) GaN in chemical vapor deposition. The carbon precursors were studied by comparing the efficiency of carbon incorporation in G…
Malachite ore is one of the most important of oxidized copper ores. Copper production can be performed by using this ore. In this work, the leaching kinetics of malachite in ammonium sulfate solutions was investigated, and metallic copper was recovered by a cementation method from the resulting actual leach solution.…
Because of its high sensitivity for light elements and the scattering contrast manipulation via isotopic substitutions, neutron reflectometry (NR) is an excellent tool for studying the structure of soft-condensed material. These materials include model biophysical systems as well as in situ living tissue at the solid-…
The proper orthogonal decomposition combined with the discrete empirical interpolation method is investigated in order to reduce a finite-element model of a multiple-input non-linear device. The non-linear reduced problem is solved using the Newton-Raphson method. The transient state of a three-phase transformer with…
Carbon nanotubes (CNTs) are one of the most valuable materials with high thermal conductivity (above 1750 W/m K compared to thermal conductivity of Ag 419 W/m K). Owing to their very high thermal conductivity, CNTs are one of the most suitable nanoadditives in fabricating the nanofluid with thermal conductivities that…
Abstract The largest nephrite-bearing province of Russia is located on the southern folded periphery of the Siberian craton. Deposits of two formation types were established here: apoultrabasic (East Sayan and Dzhida areas, Parama massif) and apocarbonate (Vitim area). Nephrites compose schlieren and lenticular bodies…
In this paper, several of analytical methods for modelling the magnetic field are described. These models are used in design routines of the rotating machines, linear motors as well as actuators. Thanks to their high accuracy and low requirements for computation power, they are successfully implemented in designing hi…
This paper proposes a new decoupled analytical modeling method for switched reluctance machine (SRM). The flux linkage is represented by a second-order Fourier series, and the coefficients of the series are position dependent, which can be further expressed by another second-order Fourier series. The proposed method o…
Native lung extracellular matrix can be isolated from cadaveric organs via perfusion decellularization and provides a novel scaffold material for lung engineering. Based on this platform, several proof-of-principle studies have demonstrated the feasibility of whole organ recellularization and culture in rodent models…
The prediction and calculation of eddy current losses occurring in permanent magnets (PMs) of electrical machines is of great interest. Most accurate results are achieved using 3-D finite-element (FE) simulations, which require long computation times and elaborate models. Due to this, 3-D methods are only applied in t…
High resolution molecular dynamics simulations with full Coulomb interactions of electrons are used to investigate field emission in planar nanodiodes. The effects of space-charge and emitter radius are examined and compared to previous results concerning transition from Fowler-Nordheim to Child-Langmuir current [Y. Y…
This paper presents an overview of high performance electrical machines for aerospace applications. The drive towards aircraft electrification is highly dependent on the performance and reliability of electrical machine drive systems. A review of the advancements of electrical machine constituent materials which are b…
Neste trabalho, o enfoque foi a integração dos processos de compostagem e vermicompostagem para otimizar a reciclagem de resíduos sólidos. Cada tratamento recebeu um volume total de 40 cm3 de resíduos. Os experimentos foram realizados em duas etapas: a primeira constituiu-se na pré-compostagem de resíduos sólidos vege…
UNLABELLED: Background and aims. Polymethyl methacrylate (PMMA) is widely used for the fabrication of removable prostheses. Silver nano-particles (AgNps) have been added to PMMA because of their antimicrobial properties, but their effect on the mechanical properties of PMMA is unknown. The aim of this study was to inv…
This investigation reports synthesis of core-shell NiFe2O4/Y2O3 nanoparticles by sol-gel technique and their H2 volume generation ability via thermochemical water-splitting reaction at 900 °C–1100 °C. Thermochemical water-splitting process involves a cyclic operation of a low-temperature water-splitting step and relat…
Bringing two miscible fluids into contact naturally generates strong gradients in surface tension. Here, we investigate such a Marangoni-driven flow by continuously supplying isopropyl alcohol (IPA) on a film of water, using micron-sized droplets of IPA-water mixtures. These droplets create a localized depression in s…