Materials Literature
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Abstract An extended interpretation of the Wolkenstein–Ptitsyn formula for temperature band δTg, characterizing a range of transition from liquid to glass, is considered using the Razumovskaya–Bartenev concept. The derivation of this formula proposed by the authors does not depend on the specific type of temperature d…
The evolution of the electronic structure and optical and magnetic properties of ErNi5 – xCox compounds (x = 0–4), occurring upon substitution of nickel by cobalt atoms, has been investigated. Spin-polarization calculations of the band spectrum of these intermetallic compounds have been performed within the local spin…
We proposed a patch antenna with a circular ring structure loaded at the source of antenna radiation to increase the gain. Expanding the ground to suppress the backward wave of the antenna. Compared with conventional antennas, the gain of the designed antenna is 11.6 dBi, which is increased by 5 dBi, and improved with…
There are different ways to determine aerodynamic parameters, using analytical and experimental data for analyzing the behavior of structures when exposed to wind load. To date, the most developed is considered a numerical method for determining the characteristics of the above methods, based on the numerical solution…
The colloidal silver is an ecologic antiseptic medium utilized for elimination of germs and fungi. It can be used for sterilization of automotive and stationary heating, ventilation and air conditioning (HVAC) systems. In the paper a programmable portable generator used for preparation of such a medium is presented. T…
Tesis entregada a la Universidad de Chile en cumplimiento parcial de los Requisitos para optar al Grado de Magister en Ciencias Quimicas.
The electron transport properties of thin Pb films on Si(111)-(6 6)Au surface are studied experimentally using the four-point probe method and reflection high-energy electron diffraction system in UHV condition. We have measured the electrical conductance of the substrate with deposited at liquid nitrogen temperature…
The US Nuclear Regulatory Commission and consensus standards recommend validation of the numerical methods used in criticality safety analyses. This validation requires the comparison of computational results with measurements of physical systems which are neutronically similar to those used in the safety analysis bei…
The medium-temperature catalytic conversion of carbon (II) oxide with water vapor is an integral part of the process of obtaining technical hydrogen, the main component of synthesis gas (nitrogen-hydrogen mixture) for the production of ammonia. Determination of the likely lifetime of catalysts. Medium-temperature stea…
We present isotopically engineered Si-28/SiGe heterostructures for development of silicon-based quantum computers using a standard silicon CMOS integration technology. Our Si-28 quantum-wells are well-strained and demonstrate high electron mobility and large valley-splitting. These properties provide promising platfor…
The performance of any finite element (FE) structural analysis is directly related to the global number of nodes and degrees of freedom (DOF) of the discretized structure and mesh distribution attributes. It is obvious that the appropriate numerical analysis needs finer elements in the zone of interest, e.g. zone of h…
In this work, we simulate by SCAPs simulator (Solar Cell Capacitance Simulator) the Selenide Gallium buffer layer on the p-CuInGaSe2based solar cells. The thicknesses reduction of the buffer layer was studied. The lattice parameters of the buffer and the absorber layers are almost similar. This can permit to the struc…
Abstract The high corrosion rates of molds in injection molding machines are analyzed. The causes of such corrosion are considered.
In this paper, We present a numerical technique for predicting the far-field pattern of slotted waveguide antennas based on an adaptation form of the discrete dipole approximation (DDA). By using this method, we can predict the radiation pattern of slotted waveguide antennas with different congurations. The capabiliti…
The domain wall (DW) dynamics of epitaxial and polycrystalline multilayers with perpendicular magnetic anisotropy have been investigated. DC magnetron sputtering was used to deposit different multilayers. The saturation magnetization, anisotropy energies, exchanges stiffness constant, and DW width and energy density wer…
Abstract The effect of borate anion concentration on the electrochemical corrosion behavior of Cd–Bi eutectic alloy in borate buffers with a pH of 7.4 is studied. The results for the alloy are contrasted with the data obtained for the individual metals. Borate species are shown to participate in the anodic dissolution…
Silicate glasses are the most common glass types and have impact on almost every aspect in our lives: from window, containers, to glass fibers for telecommunications. Unlike their crystalline counterparts, glass materials lack long-range order in their atomic arrangement but their structures do possess short and mediu…
The use of Magnesia as a dopant to control the exaggerated grain growth of alumina as well as to enhance the densification of sintered alumina has been well studied. It is well documented that the sintered density and the grain size refinement takes place on sintering MgO doped alumina. However, not much study has bee…
An important role in the fire safety system of oil and gas facilities is given to measures aimed at reducing the fire risk. The development of methods for assessing various impacts, in particular, high temperatures, manifested in hydrocarbon combustion, as well as the improvement of the regulatory framework are topica…
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