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44 resultados encontrados.

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Effect of Ionizing Radiation on the Structure, Electro-Physical and Optical Characteristics of Cd1-xZnxTe Crystals
Artículo
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P. M. Fochuk et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
Based on X-ray studies, conditions for growth of high structural perfect Cd1-хZnxTe (0,02≤х≤0,1) crystalshave been optimized. In crystals obtained, changes in the structure, electrical parameters and optical transm...
LCC TENDOlBoeXNpY3M~Idioma eng
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Study of electrokinetic and magnetic properties of ZrNi1-xRhxSn semiconductive solid solution
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Lyubov Romaka et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
The features of electrokinetic, energy state and magnetic characteristics of ZrNi1-xRhxSn semiconductive solid solution were investigated in the ranges: T = 80-400 K, x = 0-0.10. It was shown that substitution of Ni atom...
LCC TENDOlBoeXNpY3M~Idioma eng
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The Hollow Spherical Silica Molecule (SiO<sub>2</sub>)<sub>20</sub>(H<sub>2</sub>O)<sub>10</sub>: Theoretical Calculations of the IR spectrum
Artículo
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O. Filonenko et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
The IR spectrum of hollow spherical molecule (SiO2)20(H2O)10 have been calculated within harmonic approximation using density functional theory method (exchange-correlation functional B3LYP and basis set 6-31G (d, p)) an...
LCC TENDOlBoeXNpY3M~Idioma eng
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Thermodynamic Analysis of Perspective AlB<sub>12</sub> Synthesis Reactions from Industrially Accessible Oxygen-Free Compounds
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O. Vasiliev et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
Reactions of aluminum dodecaboride synthesis from oxygen free industrially available boron compounds by interaction of condensed and gaseous aluminum with boron nitride and carbide were the subject of thermodynamic analy...
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A quantum chemistry study on the interaction between silica surface and aqueous alkaline solutions
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A. A. Kravchenko et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
A quantum chemical analysis has been carried out of the equilibrium structure and energy parameters of hydrated Li+, Na+, and K+ cations interacting with ionized silica surface by means of density functional theory metho...
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Coping with Forest and Land Fire Regulatory Challenges in Indonesia: an Assessment to the Regulatory Enforcement
Artículo
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Isna Fatimah · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 2311-0155
The uncontrolled expansion of plantation activities within peatland areas is one of the major trigger causing forest and/or land fire (Fire) in Indonesia. To deal with such problems including other influencing variables ...
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Edge Absorption of (Y<sub>0.06</sub>Ga<sub>0.94</sub>)<sub>2</sub>O<sub>3</sub> Thin Films
Artículo
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O. M. Bordun et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
Fundamental absorption edge of (Y0.06Ga0.94)2O3 thin films, obtained by radio-frequency ion-plasmous sputtering, was investigated using the method of optical spectroscopy. It was established that these films are formed i...
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Effect of pH of the Reaction Medium on the Structure and Properties of Spinel-Type Ferrite Nanopowder
Artículo
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B. K. Ostafiychuk et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
In this work by using sol-gel auto-combustion synthesis was synthesized single-phase magnesium-substituted lithium ferrite at different pH reaction medium. The synthesized materials were investigated by X-ray and Mossbau...
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Electrical Instability of CdTe:Si Crystals
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Ye. S. Nykoniuk et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
Results of Hall effect measurements of cadmium telluride crystals, doped by silicon (dopant concentration in the melt was 1018 - 1019 cm-3), allowed to classify the studied samples and the conditions under which probably...
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Interaction of the components in the Gd-Mn-Sn ternary system at 873 and 673 K
Artículo
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L. P. Romaka et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
The interaction of the components in the Gd-Mn-Sn ternary system was studied using the methods of X-ray and microstructure analyses, in the whole concentration range. The phase diagrams of the Gd-Mn-Sn system were constr...
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Kinetics of Fragmentation During Annealing in Vacuum of Titanium Nanofilms Deposited Onto Non-Metallic Materials
Artículo
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Yu. V. Naydich et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
The results are presented of the study of kinetics of fragmentation of titanium nanofilms 100 nm thick deposited onto the surface of samples made from single crystals of Al2O3(leucosapphire), ZrO2, SiC, and AlN ceramics ...
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Peculiarities of Electrical Characteristics of Semi-Insulating CdTe-Cl crystals
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Ye. S. Nykoniuk et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
Electrical properties of semi-insulating CdTe-Cl crystals, grown by the vertical Bridgman and the travelling heater method, have been studied. It is found that the travelling heater method provides electron conductivity ...
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Problems of Selection of Lubricants for Ethylene High-Pressure Compressors. 4. Investigation of antifriction properties of naphtene and polyglycol oils during high loading of solid lubricant pair
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H. O. Sirenko et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
The antifriction properties of naphtene and polyglycol oils during little loading with lubrication of pair bronze-tungsten-carbide-alloy WK-6 (WK-ll) and graphelon-20-WK-6 (WK-11) and high loading with lubrication of pai...
LCC TENDOlBoeXNpY3M~Idioma eng
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Structure Formation and Corrosion Behaviour of Quasicrystalline Al–Ni–Fe Alloys
Artículo
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O. V. Sukhova et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
The formation of quasicrystalline decagonal phase and related crystalline phases was investigated by a combination of optical metallography, powder X-ray diffraction, atomic absorption spectroscopy and differential therm...
LCC TENDOlBoeXNpY3M~Idioma eng
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Material complementario
Synthesis, Electrical and Magnetic Properties of Composites Copper Iodide/Magnetite-Polychlorotrifluoroethylene
Artículo
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R. V. Mazurenko et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
The structural, magnetic and electrophysical properties of composites based on nanosized magnetite chemically modified of copper iodide and polychlortrifluoroethylene have been studied at temperatures 298 – 450 K and C...
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Open Access
Temperature Dependence of the Refractive Index of Vitreous Alloys of the Ag-As-S System
Artículo
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I. I. Shpak et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
The temperature coefficient of refractive index dn/dT is determined for glassy allous of the system along the(Ag2S)x(As2S3)100-x, direction (0 &lt; x &lt;20) in the spectral interval of 1–5 μm at temperature of 77– ...
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The Influence of Air Exposition of the Zr-Mn-Cr-Ni-Al Alloy on Cycle Life
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Yu.M. Solonin et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
It was found by scanning electron microscopy method that the ZrMn0.5Ni1.2Cr0.18А0.1 alloy has a dendritic structure, and the shooting of a typical section of the surface of the metalographic sample in characteristic rad...
LCC TENDOlBoeXNpY3M~Idioma eng
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The Influence of Step-By-Step Air Exposition of the Zr-Mn-Cr-Ni-V Alloy on Cycle Life
Artículo
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Yu. M. Solonin et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
In the course of the research it was determined that step-by-step air exposition of the Zr-Mn-Cr-Ni-V alloy (in the form of ingot and powder) facilitating the formation of concentration inhomogeneity significantly increa...
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The Influence of the Synthesis Temperature on Phase Composition and Structure of Tenary Compounds Obtained from the Powder Mixture of the TiH2-Al-C System
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G.А. Bagliuk et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
This paper presents results of an investigation of the features of phase and structure formation of a ternary compound during thermal sintering use of compacted TiH2-Al-C powder blends. The thermal sintering was carried ...
LCC TENDOlBoeXNpY3M~Idioma eng
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The Plasticing Effect on Structure Forming and Crystallization Processes in Polymer Blends of Polypropylene-Poly(Vinyl Alcohol)
Artículo
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L. S. Dzubenko et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
There is one established, that glycerol’s injection in (7,0 ÷ 15,0) % of mass. amount into polymer blend of polypropylene/poly(vinyl alcohol) (PP/PVA) of mass equation 30/70 % is not changing the structure forming c...
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The kinetics of adsorption binding of Ba<sup>2+</sup> ions by trimethylsilylated silica
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I. F. Myronyuk et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
It was established that incomplete substitution of free silanols of fumed silica surface on (CH3)3Si-groups leads to an increase in the ability of modified SiO2 to adsorb Ba2+ cations from an electrolyte solution. Silica...
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Composite Thermoelectric Materials Based on Lead Telluride and Cadmium Telluride
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O.M. Matkivsky et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
The results of the researching of thermoelectric properties of samples, which are obtained by compressingmechanical mixtures of microdisperse powders PdTe and CdTe, are presented. It was found that the using ofcadmium fo...
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Computersimulation of the Dynamic Operating Modes of Thermoelectric Device for Cryodestruction
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L.I. Anatychuk et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 1729-4428
This paper presents the results of computer simulation of optimal dynamic modes of thermoelectric device for cryodestruction. The optimal time function for controlling the supply current to thermoelectric micromodule in ...
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Contributing to Nature’s Recovery through Urban Agriculture
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Jamie Matthews et al · Vasyl Stefanyk Carpathian National University · 2018 · ISSN 2311-0155
The paper analyses the legally established practice of agriculture has been forced out of the urban environment as land value increases with higher population densities. It’s stated, that cities and surrounding urban e...
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