Search Results - "Koval, Y"

High-temperature shape memory alloys: Some recent developments by Firstov, G.S, Van Humbeeck, J, Koval, Y.N

“…Several alloy systems can be selected for high-temperature shape memory alloys (HTSMA) with stable transformation temperatures above 390 K. However, due to the…”
Get full text

Enhanced macroscopic quantum tunneling in Bi2Sr2CaCu2O8 + delta intrinsic Josephson-junction stacks by Jin, X Y, Lisenfeld, J, Koval, Y, Lukashenko, A, Ustinov, A V, Müller, P

“…We have investigated macroscopic quantum tunneling in Bi(2)Sr(2)CaCu(2)O(8 + delta) intrinsic Josephson junctions at millikelvin temperatures using microwave…”
Get full text

Josephson behavior of phase-slip lines in wide superconducting strips by Sivakov, A G, Glukhov, A M, Omelyanchouk, A N, Koval, Y, Müller, P, Ustinov, A V

“…Phase-slip lines can be viewed as dynamically created Josephson junctions in a homogeneous superconducting film. In contrast to phase-slip centers, phase-slip…”
Get full text

IMPROVEMENT OF THE METHODOLOGICAL APPROACH TO ASSESSING THE IMPACT OF PUBLIC GOVERNANCE ON ENSURING THE ECONOMIC SECURITY OF THE STATE by Akimova, L., Akimov, O., Mihus, I., Koval, Y., Dmitrenko, V.

“…Ensuring economic security is a guarantee of independence and autonomy of the state, an integral condition for stability and effective functioning of society…”
Get full text

Quantum dynamics of a single vortex by Wallraff, A, Lukashenko, A, Lisenfeld, J, Kemp, A, Fistul, M. V, Koval, Y, Ustinov, A. V

“…Vortices occur naturally in a wide range of gases and fluids, from macroscopic to microscopic scales. In Bose-Einstein condensates of dilute atomic gases,…”
Get full text

Coulomb gap variable range hopping in graphitized polymer surfaces by Koval, Y., Lazareva, I., Müller, P.

“…The conductivity of several polymers was investigated after low-energy ion irradiation. The enhancement of conductance induced by the ions is discussed in…”
Get full text

2-Allyloxy/propargyloxypyridines: synthesis, structure, and biological activity by Babaev, E. V., Koval, Y. I., Rybakov, V. B., Paronikyan, E. G., Stepanyan, G. M., Paronikyan, R. G., Dashyan, Sh. Sh, Rzhevskii, S. A., Shadrin, I. A.

“…The alkylation (allylation and propargylation) of 3-cyano-6-dialkylamino-2-pyridones containing a d-annulated ring occurs at the oxygen atom. The structures of…”
Get full text

Mechanical Properties Under Cyclic Loading of Rolled Ordered Materials Produced from Continuous Elastic Fibers. II. Fatigue Resistance, Vibration Strength, and Vibration Deformation by Lugovskoi, Yu. F., Zorin, V. A., Nazarenko, V. A., Spiridonov, S. A., Koval, A. Y.

“…Ribbons with a porosity varying from 22 to 0.5% have been produced by rolling a multilayer knitted-mesh package made of 12Kh18N10T steel wire bundles 30 μm in…”
Get full text

THE STATE OF ECONOMIC SECURITY OF UKRAINIAN BANKING INSTITUTIONS AND THE EFFECT OF ECONOMIC REFORMS ON FORMATION OF ANTI-CRISIS MEASURES by Mihus, I. P., Haman, P. I., Andriyenko, M. V., Koval, Y. S.

“…The integration in the state financial space is complementary to the system of legislative regulation of banking activities. Protests against the current…”
Get full text

Conductance enhancement of polymethylmethacrylate bombarded by low-energy ions by Koval, Y., Fistul, M. V., Müller, P.

“…It has been found that films of polymethylmethacrylate (PMMA) show a substantial conductance after bombardment by Ar ions with energy of 250 – 1250 eV . The…”
Get full text

Field effect transistors on graphitized polymer surfaces by Koval, Y., Lazareva, I., Müller, P., Müller, K., Henkel, K., Friedrich, D.

“…Conducting properties of several polymers after low‐energy ion irradiation were investigated. The enhancement of conductance induced by the ions is discussed…”
Get full text

Comparison of high temperature shape memory behaviour for ZrCu-based, Ti–Ni–Zr and Ti–Ni–Hf alloys by Firstov, G.S, Van Humbeeck, J, Koval, Yu.N

“…New ZrCu-based high temperature shape memory alloys with M s close to 500 K are under development. The shape memory behaviour of this material is compared to…”
Get full text

Avaluation of morphofunctional condition of rats organism for study of toxicity of the preparation tilmicosine basis by Zhyla, M. I., Patereha, I. P., Tomaszewska, E., Muszynski, S., Dobrowolski, P., Dubin, O. M., Koval, Y. B.

“…The article presents the study results of the acute and subacute toxicity of the veterinary drug “Tylmozyn 25” (solution for oral administration) based on…”
Get full text

Enhancement of Josephson Phase Diffusion by Microwaves by KOVAL, Y, FISTUL, M. V, USTINOV, A. V

“…We report an experimental and theoretical study of the phase diffusion in small Josephson junctions under microwave irradiation. A peculiar enhancement of the…”
Get full text

Use of polymethylmethacrylate for pattern transfer by ion beam etching: Improvement of etching homogeneity and patterning quality by Koval, Y., Borzenko, T., Dubonos, S.

“…We have studied the peculiar defects that appear on the surface of polymethylmethacrylate (PMMA) during ion beam etching. The quantity of defects and their…”
Get full text

Quantum dissociation of a vortex-antivortex pair in a long josephson junction by Fistul, M V, Wallraff, A, Koval, Y, Lukashenko, A, Malomed, B A, Ustinov, A V

“…The thermal and the quantum dissociation of a single vortex-antivortex (VAV) pair in an annular Josephson junction is experimentally observed and theoretically…”
Get full text

Unit cell determination in CuZr martensite by electron microscopy and X-ray diffraction by Schryvers, D., Firstov, G.S., Seo, J.W., Van Humbeeck, J., Koval, Yu.N.

“…Based on extensive three-dimensional electron diffraction data, HREM images, and a new Rietveld fitting procedure of existing x-ray diffractometry data, new…”
Get full text

Microstructure and mechanical properties of B4C-NbB2-SiC ternary eutectic composites by a crucible-free zone melting method by Upatov, M., Vleugels, J., Koval, Y., Bolbut, V., Bogomol, I.

“…Directionally solidified B4C–NbB2-SiC ternary composites were prepared by a floating zone method based on crucible-free zone melting of compacted powders. The…”
Get full text

BLOOD COAGULATION DISORDERS IN PATIENTS WITH LIVER CIRRHOSIS INFECTED COVID-19 by Sirchak, Yelyzaveta S, Maroshan, Monika T, Dankanych, Yevheniia E, Balazh, Olesia P, Koval, Valentina Y

“…The aim: To investigate the features of coagulation homeostasis in patients with liver cirrhosis (LC) in COVID-19 infection. Materials and methods: At the…”
Get more information

Detection of 0.5THz radiation from intrinsic Bi2Sr2CaCu2O8 Josephson junctions by Batov, I. E., Jin, X. Y., Shitov, S. V., Koval, Y., Müller, P., Ustinov, A. V.

“…We report the detection of electromagnetic radiation at about 500GHz from current-biased intrinsic Bi2Sr2CaCu2O8 single crystal Josephson junctions. We used…”
Get full text