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Тapacov¸Борис ( Tarasov Boris ) 배재대학교 한국-시베리아센터 2008 한국시베리아연구 Vol.12 No.1
It is well-known, as Pushkin noted, that following a great man’s thought is both fascinating and useful thing. The notice gains particular significance when speaking about Lev Tolstoy, who defined the main contradictions of his epoch as permanently challenging the problems of spiritual and social life. This article highlights Tolstoy’s speculations on civilization, democracy, science and progress, found on the pages of his diaries. Negligence of the underside of these processes is pregnant with dangerous consequences for the human aspect of life. Tolstoy, as well as Dostoevsky, was in principle an opponent of the so called theory of environment that states that the changes and development of the environment change and develop conscience of people. He argued that the development of the democracy and law-making, science and technology only predetermines being and prosperity independent in outward appearance, but those processes do nothing to transform the unseen, they don not impart morality or enlightenment on people. The changes and development of the environment do not enlighten the egocentric core of a “free” character where ambition, lust, jealousy, vanity and so on harden and refine. According to his diaries, Tolstoy was not against the achievements of civilization, but he was astonished at the contrast between the material welfare of society and the spiritual poverty within it, as all the moral forces of man and the vast technological achievements were focused on the material welfare and comforts of life. He disclosed the chronic paradoxes which were revealed when the scientific discoveries were progressively applied to correcting the deformity made by science itself, for as, or when the availability of so many books makes the search for one book in particular so difficult, when the possibility of the cross-impact of people with the help of mass media predetermines the mass circulation of evil. In the article it is emphasized that according to Tolstoy’s logic real progress depends on a person’s inner enlightenment, which is in turn focused on overcoming man’s selfish nature, on purging of willful craving and elaboration of conscience, on the moral perfection both of an individual and of the society. This logic would seem to be consistent with the speculation of Pushkin, Gogol, Dostoevsky, K.N. Leontiev, P.I. Chaadaev, P.A. Sorokin and other Russian writers and thinkers, as if Tolstoy engages in conversation with them.
Deep learning in nickel-based superalloys solvus temperature simulation
Dmitry A., Tarasov,Andrey G., Tyagunov,Oleg B., Milder Techno-Press 2022 Advances in aircraft and spacecraft science Vol.9 No.5
Modeling the properties of complex alloys such as nickel superalloys is an extremely challenging scientific and engineering task. The model should take into account a large number of uncorrelated factors, for many of which information may be missing or vague. The individual contribution of one or another chemical element out of a dozen possible ligants cannot be determined by traditional methods. Moreover, there are no general analytical models describing the influence of elements on the characteristics of alloys. Artificial neural networks are one of the few statistical modeling tools that can account for many implicit correlations and establish correspondences that cannot be identified by other more familiar mathematical methods. However, such networks require careful tuning to achieve high performance, which is time-consuming. Data preprocessing can make model training much easier and faster. This article focuses on combining physics-based deep network configuration and input data engineering to simulate the solvus temperature of nickel superalloys. The used deep artificial neural network shows good simulation results. Thus, this method of numerical simulation can be easily applied to such problems.
Deep learning in nickel-based superalloys solvus temperature simulation
Dmitry A., Tarasov,Andrey G., Tyagunov,Oleg B., Milder Techno-Press 2022 Advances in aircraft and spacecraft science Vol.9 No.5
Modeling the properties of complex alloys such as nickel superalloys is an extremely challenging scientific and engineering task. The model should take into account a large number of uncorrelated factors, for many of which information may be missing or vague. The individual contribution of one or another chemical element out of a dozen possible ligants cannot be determined by traditional methods. Moreover, there are no general analytical models describing the influence of elements on the characteristics of alloys. Artificial neural networks are one of the few statistical modeling tools that can account for many implicit correlations and establish correspondences that cannot be identified by other more familiar mathematical methods. However, such networks require careful tuning to achieve high performance, which is time-consuming. Data preprocessing can make model training much easier and faster. This article focuses on combining physics-based deep network configuration and input data engineering to simulate the solvus temperature of nickel superalloys. The used deep artificial neural network shows good simulation results. Thus, this method of numerical simulation can be easily applied to such problems.
Olga N. Pavlyuk,Yulia Trebukhova,Vitalyi G. Tarasov 한국해양과학기술원 2009 Ocean science journal Vol.44 No.3
In May, 2007 we sank the remains of a Minke whale (Balaenoptera acutorostrata) in the East Sea, Peter the Great Bay, at 30 m of water near the coast of Big Pelis Island. In the present study we describe the nematode communities in sediments under the implanted whale carcass. Abundance of nematodes increased with the distance from the carcass. Dominant trophic group was non-selective deposit feeders. The highest values of indexes of a specific diversity and evenness were noted in sediments under the whale, while domination index occurred at the highest distance from the whale. The suggestion is made that the cause of low density of nematodes in sediments under the whale is an extreme increase in number of macrofaunal animals, and predation and food competition between macro– and meiofauna. The changes noted in nematode assemblages living in an implanted whale in shallow waters are similar to those in deep-sea assemblages. In May, 2007 we sank the remains of a Minke whale (Balaenoptera acutorostrata) in the East Sea, Peter the Great Bay, at 30 m of water near the coast of Big Pelis Island. In the present study we describe the nematode communities in sediments under the implanted whale carcass. Abundance of nematodes increased with the distance from the carcass. Dominant trophic group was non-selective deposit feeders. The highest values of indexes of a specific diversity and evenness were noted in sediments under the whale, while domination index occurred at the highest distance from the whale. The suggestion is made that the cause of low density of nematodes in sediments under the whale is an extreme increase in number of macrofaunal animals, and predation and food competition between macro– and meiofauna. The changes noted in nematode assemblages living in an implanted whale in shallow waters are similar to those in deep-sea assemblages.
A Study of the Inorganic Scintillator Properties for a Phoswich Detector
Lee, Woo-Gyo,Kim, Yong-Kyun,Kim, Jong-Kyung,Tarasov, V.,Zelenskaya, O. Korean Association for Radiation Protection 2004 방사선방어학회지 Vol.29 No.4
CsI(Tl), $CdWO_4(CWO),\;Bi_4Ge_3O_{12}(BGO)\;and\;Gd_2SiO_5:Ce(GSO)$ scintillators were studied to manufacture a phoswich detector. The maximum wavelengths of the CsI(Tl), CWO, BGO and GSO scintillators are 550 nm, 475 nm, 490 nm and 440 nm for the radioluminescence, and the absolute light outputs of the CsI(Tl), CWO, BGO and GSO scintillators are 54890 phonon/MeV, 17762 phonon/MeV, 8322 phonon/MeV and 8932 phonon/MeV with a neutral filter, and the decay time of the CsI(Tl), CWO, BGO and GSO scintillators is $1.3{\mu}s,\;8.17{\mu}s$, 213 ns and 37 ns by a single photon method. The phoswich detector which was manufactured with plastic and CsI(Tl) scintillators could separate the ${\beta}$ particle and ${\gamma}$ ray. The phoswich detector could also measure the pulse height spectra of the ${\beta}$ particle and ${\gamma}$ ray by a PSD method. Phoswich 검출기를 제작하기 위하여 무기 섬광체인 CsI(Tl), $CdWO_4(CWO),\;Bi_4Ge_3O_{12}(BGO)$와 $Gd_2SiO_5:Ce(GSO)$의 특성을 연구하였다. CsI(Tl), CWO, BGO 및 GSO 섬광체의 radioluminescence 중심파장은 550 nm, 475 nm, 490 nm 및 440 nm이였고, neutral filter를 사용하여 측정한 CsI(Tl), CWO, BGO 및 GSO 섬광체의 절대광량은 각각 54890 phonon/MeV, 17762 phonon/MeV, 8322 phonon/MeV 및 8932 phonon/MeV이였으며, single photon method로 측정한 형광감쇠시간은 각각 $1.3{\mu}s,\;8.17{\mu}s$, 213 ns 및 37 ns이였다. 플라스틱 섬광체와 CsI(Tl) 섬광체를 사용하여 phoswich 검출기를 제작하였고 PSD(pulse shape discriminator) 방법으로 ${\beta}$ 입자와 ${\gamma}$ 선을 구별하며 각각의 방사선에 대한 파고 스펙트럼을 측정하였다.
M. A. Eryomina,S. F. Lomayeva,V. V. Tarasov,S. N. Paranin,I. L. Lomaev,K. G. Mikheev,S. L. Demakov 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.6
Wide application of hard composite materials in modern technologies stimulates a search for new compositions and moreefficient and cheaper ways of their obtaining. A novel Ti carbohydride/CuTi/CuTi2/GNP (few-layer graphene or graphitenanoplatelets) composites were produced via magnetic pulsed compaction of Ti, Cu and graphite powders mechanicallymilled in liquid organic medium for 4 h. Phase composition and microstructure were examined by X-ray diffraction, scanningelectron microscopy, transmission electron microscopy and Raman spectroscopy. Density, microhardness, ultimatecompression strength, abrasive wear resistance and sliding wear resistance of the composites were studied. The compositesconsisted of hexagonal and cubic titanium carbohydrides, CuTi2and CuTi intermetallics, ~ 5 wt% of GNP and amorphouscarbon. The presence of GNP and amorphous carbon resulted in higher wear resistance under conditions of dry frictionagainst steel (1 wt%C, 1.5 wt%Cr) but lower composite density, microhardness, ultimate compression strength and abrasionwear resistance as compared with the GNP-free composites.
State filling dependent luminescence in hybrid tunnel coupled dot-well structures.
Mazur, Yuriy I,Dorogan, Vitaliy G,Ware, Morgan E,Marega, Euclydes,Benamara, Mourad,Zhuchenko, Zoryana Ya,Tarasov, Georgiy G,Lienau, Christoph,Salamo, Gregory J RSC Pub 2012 Nanoscale Vol.4 No.23
<P>A strong dependence of quantum dot (QD)-quantum well (QW) tunnel coupling on the energy band alignment is established in hybrid InAs/GaAs-In(x)Ga(1-x)As/GaAs dot-well structures by changing the QW composition to shift the QW energy through the QD wetting layer (WL) energy. Due to this coupling a rapid carrier transfer from the QW to the QD excited states takes place. As a result, the QW photoluminescence (PL) completely quenches at low excitation intensities. The threshold intensities for the appearance of the QW PL strongly depend on the relative position of the QW excitonic energy with respect to the WL ground state and the QD ground state energies. These intensities decrease by orders of magnitude as the energy of the QW increases to approach that of the WL due to the increased efficiency for carrier tunneling into the WL states as compared to the less dense QD states below the QW energy.</P>
Magnetic Properties of Epitaxial [Pd/Co/CoO]n Superlattices
A. G. Kozlov,A. F. Shishelov,A. A. Turpak,M. A. Kuznetsova,A. V. Prikhodchenko,A. V. Davydenko,E. V. Tarasov,N. N. Chernousov,A. V. Ognev,A. S. Samardak 한국자기학회 2024 Journal of Magnetics Vol.29 No.1
Here, the investigation of the structural features, magnetic properties, and domain structure of multilayer superlattices prepared by molecular beam epitaxy and partial oxidation of magnetic layers is presented. The influence of the number of repetitions on the morphology of the interfaces is investigated. It is also shown that the epitaxial growth of the Pd and Cu layers is retained when growing over oxide layers. The paper presents the dependences of the coercive force and magnetic anisotropy energy and explains their behavior. The domain structure is studied by the magnetooptical Kerr effect and magnetic force microscopy. The possibilities of modifying the domain structure into skyrmion lattices by local action with a magnetic probe and without an external magnetic field are demonstrated.