Materials Literature
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Published data on the influence of the effective nanoparticle size and the atomicity of clusters on the physicochemical properties of substances are considered. An interpretation is suggested for the analytical relations of the first and second laws of thermodynamics considered with conversion of the substance and the…
This paper presents an axial-flux machine with hybrid excitation, in which the flux linkage can be regulated in an extremely wide range through an excitation winding. Therefore, this machine shows a theoretically infinite constant power speed range and exhibits also an high degree of fault tolerance against uncontroll…
In this work, based on experimental observations and exact theoretical predictions, the kinetic scheme of RAFT polymerization is extended to a wider range of reactions such as irreversible intermediate radical terminations and reversible transfer reactions. The reactions which have been labeled as kinetic scheme are t…
The osteointegration of a new three-dimensional reticular titanium material, Trabecular Titanium™, was assessed using a bilateral cancellous (distal femur, proximal tibia) and cortical (tibia diaphysis) bone drill hole model in 18 sheep. TT is a novel Ti6Al4V material characterized by a high open porosity and composed…
The effect of Ar pressure on the performance of W/Si multilayers is investigated. W/Si multilayers were deposited by a high vacuum DC magnetron sputtering system. The Ar pressure was changed from 1.0 to 5.0 mTorr with an interval of 1.0 mTorr during the deposition process. Electron probe microanalysis and Rutherford b…
temperature-preprogrammed desorption, temperature-preprogrammed reduction, X-ray photoelectron spectroscopy and BET surface area methods. XRD analysis of the samples calcined at 550 °C indicates that the impregnated active components are in a highly dispersed state on the support. XP spectra shows the existence of van…
The study covers the design, analysis and experimental study of a 1 kW motor which is designed for a special in-wheel motor driven light electric vehicle. The main concern is to design a BLDC motor having a higher value direct-axis phase inductance which is providing high performance field weakening operation. A sub-f…
This paper puts forward a simplified method for assessing the failure modes of rigid-plastic beams by solving the governing partial differential equation with defined initial conditions based on five previously developed transverse velocity profiles. It is found that there are twelve different response patterns possib…
Top-down ZnO nanowire FETs have been fabricated using mature photolithography, ZnO atomic layer deposition (ALD) and plasma etching. This paper investigates the effects of oxygen adsorption by measuring FET characteristics at different gate bias sweep rates and by characterizing hysteresis effects. Unpassivated device…
A gate stack structure with a thin ZnO layer between an oxidized Si(100) surface and an alloyed hafnium and lanthanum oxide (HfO2-La2O3) layer was prepared by plasma enhanced atomic layer deposition at ∼175 °C. High resolution electron microscopy indicated an amorphous structure of the deposited layers. The electronic…
The work focuses on tuning issues of a recently presented sensorless rotor temperature estimation technique for Permanent Magnet Synchronous Motors (PMSMs). The method implies an intermittent injection of a voltage pulse in the d-axis of the motor while keeping the load current zero. Thus, the resulting d-current resp…
Catalytic activity of zeolite RHO modified by silver ions and nanoparticles is studied by way of example of the hydrogen oxidation reaction. It has been ascertained that incorporation of silver nanoparticles in the zeolite RHO structure provides significant enhancement of its catalytic activity and hydrogen oxidation…
In this work we determined the mechanical properties (Young's modulus, Poisson's ratio, and shear modulus) of 400 single-walled carbon nanotubes of radii from 2.1; ((0, 5) nanotube) to 17.3 Å ((0, 45) nanotube).All nanotubes were simulated with AIREBO forcefield.It turns out that zigzag nanotubes are mechanically more…
A two-step composting process for the generation of humus-rich manure from paddy straw amended with poultry droppings was investigated in this study. The composting technique consists of two distinct steps. The first step is decomposition of lignocellulosic constituent of paddy straw by white rot fungi Poly-porus vers…
This paper deals with the response of power transformer bushings under the effect of transformer windings during electromagnetic transients such as lightning. In transient domain, investigating the characteristic of each power component separately in the network wouldn't be adequate. Each component can make an influen…
INTRODUÇÃO: O tecido adiposo obtido por lipoaspiração pode ser uma fonte acessível de células-tronco, para posterior aplicação clínica na regeneração tecidual. O processo de criopreservação mantém essas células vivas por longos períodos, sem prejuízo a suas funções. O objetivo deste estudo foi avaliar a influência de…
We have investigated the effect of light Si-doping on the optical properties of high quality GaN films with the method of low temperature photoluminescence. It is found that the peak (Ix) at 3.473 eV always appears in the photoluminescence spectra of lightly Si-doped GaN. The relative intensity of peak Ix to heavy-hol…
The Seebeck coefficient of a typical thermoelectric material, silicon-doped InGaAs lattice-matched to InP, is measured over a temperature range from 300 K to 550 K. By depositing and patterning a thermometric reference bar of silicon-doped InP adjacent to a bar of the material under test, temperature differences are m…
Cerium substituted LiCe(1-x)Ni(x)O2 (0.00 < X < 0.20) (Ce = 0.00 < X < 0.20) nano-particles were synthesized by sol-gel method using nitrate as precursor at 800 degrees C for 12 hrs. XRD studies were revealed a well defined layer structure and a linear variation of lattice parameters with the addition of Cerium confir…
The processes of physical doping of nanostructured (meta-) materials have been investigated. Two types of interference and diffraction (in the center) in hollow quantum resonators for the de Broglie waves of electrons and two types of the Vysikaylo quantum-size effects due to the polarization capture of electrons in t…