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Electromagnetic forming of aluminum alloy sheet using a grooved die: numerical modeling [Text] / Mamalis D.Manolakos D.E.Kladas A.G. [и др.] // Phys. Met. Metallogr. - Vol. 102, Suppl. 1, Chapter 13. - P. S90-S93DOI 10.1134/S0031918X06140237. - Cited References: 3
Аннотация: A commercial ANSYS FE Code is employed for the simulation of the electromagnetic sheet-metal forming into a grooved die. An industrial pancake coil is considered as the forming tool. The deformation characteristics of the sheet (workpiece) as well as the electromagnetic parameters of the high-energy process are calculated numerically. An equivalent-circuit method is used to validate the electromagnetic model. The results from both analyses are in good agreement.

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Держатели документа:
Manufacturing Technology Division, Athens, 15780, Greece
Electric Power Division, N.T.U.A., Athens, 15780, Greece
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences

Доп.точки доступа:
Mamalis, D.; Manolakos, D.E.; Kladas, A.G.; Koumoutsos, A.K.; Ovchinnikov, S. G.; Овчинников, Сергей Геннадьевич
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Magnetization processes in two-dimensional arrays of iron nanowires / D. L. Zagorskiy, S. V. Semenov, S. V. Komogortsev [et al.] // J. Magn. Magn. Mater. - 2024. - Vol. 595. - Ст. 171573, DOI 10.1016/j.jmmm.2023.171573. - Cited References: 48. - This work was supported by Russian Scientific Foundation (RSF) Grant 22-22-00983 . - ISSN 0304-8853. - ISSN 1873-4766
Кл.слова (ненормированные):
Nanowires -- Magnetic measurements -- Micromagnetic modeling
Аннотация: Arrays of iron nanowires (NWs) obtained by template-assisted electrodeposition constitute a promising composite material characterized by a combination of high magnetization in the filler and perpendicular magnetic anisotropy. The properties of these composites arise from the interplay between the behavior of individual NWs and their magnetostatic interactions. In this study, we investigated NW arrays with identical wire diameters but varying spatial arrangements. Major hysteresis loops were studied under various field directions relative to the NW axis. Key parameters such as the slope of the magnetization curve, saturation magnetization, and coercive force were quantified. Additionally, FORC (First Order Reversal Curve) measurements were conducted with the field oriented longitudinally with respect to the NW, offering insights into the inhomogeneity of the demagnetizing field influenced by the NW array's configuration. In the sample with the highest NW density, we observed isotropic behavior of the effective demagnetizing field, and we proposed an explanation for this phenomenon using the effective media approach. Micromagnetic simulations revealed that the magnetic behavior of individual NWs with a 100 nm diameter can be described as an interchange between volumes characterized by vortex and uniform magnetization patterns. Calculations of the demagnetizing field using the effective medium model demonstrated excellent agreement with experimental data across arrays featuring different NW densities. Remarkably, the quantitative consistency of coercive field values obtained from micromagnetic simulations and experimental measurements in the range of angles from 0° to 45° for the studied samples underscores the structural homogeneity of the obtained NWs.

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Держатели документа:
FSRC “Crystallography and Photonics”, Russian Academy of Sciences, Moscow, Russia
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russia
National University of Science and Technology MISiS, Moscow 119049, Russia
Immanuel Kant Baltic Federal University, Kaliningrad 236001, Russia

Доп.точки доступа:
Zagorskiy, D.L.; Semenov, S. V.; Семёнов, Сергей Васильевич; Komogortsev, S. V.; Комогорцев, Сергей Викторович; Balaev, D. A.; Балаев, Дмитрий Александрович; Doludenko, I.M.; Panina, L.V.
}
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    Part II. Nanobubbles around plasmonic nanoparticles in terms of modern simulation modeling: what makes them kill the malignant cells? / A. S. Kostyukov, I. L. Isaev, A. E. Ershov [et al.] // J. Phys. D. - 2022. - Vol. 55, Is. 17. - Ст. 175402, DOI 10.1088/1361-6463/ac4c1f. - Cited References: 49. - The research was supported by the Ministry of Science and High Education of Russian Federation (Project No. FSRZ-2020-0008), and was funded by RFBR, Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science, Project No. 20-42-240003 . - ISSN 0022-3727. - ISSN 1361-6463
   Перевод заглавия: Часть II. Нанопузырьки вокруг плазмонных наночастиц с точки зрения современного имитационного моделирования: что заставляет их убивать злокачественные клетки?

РУБ Physics, Applied
Рубрики:
STRESS WAVES
   LASER
   MEMBRANE
   DAMAGE
   DEATH
   LYSIS
Кл.слова (ненормированные):
photothermal effect -- plasmonic nanoparticle -- malignant cell membrane -- pulsed laser radiation -- finite elements analysis -- anticancer therapy -- aptamer
Аннотация: We have established numerically the physical pattern and conditions for formation of nanosized bubbles in aqueous medium around biocompatible plasmonic nanoparticles (NPs) selectively bound to the membrane of the malignant cells by means of DNA-aptamers under the action of picosecond laser radiation. The results obtained are based on the finite volume method and hydrodynamic models underlying the ANSYS Fluent package with extended capabilities. We have found the main features and previously unknown dominant factors of the damage effect on the cell membrane at the moment of the bubble nucleation around the plasmonic NPs of different types taking into account the influence of the closely located membrane. Information on the kinetics of spatial distribution of pressure, temperature and the relative proportion of vapor in the 'nanoparticle-membrane-medium' system have been obtained. The attention is drawn to the advantages of using biocompatible, perfectly absorbing core–shell plasmonic NPs for anti-tumor therapy characterized by an increased mechanical effect on malignant cell membranes at lower laser radiation intensity and the spectral position of their plasmon resonance (λ = 700 nm) in the hemoglobin transparency range. This ensures penetration of laser radiation deep into tissues. The paper is provided with an extensive review of key publications and the state-of-art in this area.

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Держатели документа:
Siberian Fed Univ, Int Res Ctr Spect & Quantum Chem IRC SQC, Krasnoyarsk 660041, Russia.
Russian Acad Sci, Inst Computat Modelling, Siberian Branch, Krasnoyarsk 660036, Russia.
Fed Med Biol Agcy Russian Federat, Fed Siberian Res Clin Ctr, Krasnoyarsk 660037, Russia.
Russian Acad Sci, LV Kirensky Inst Phys, Fed Res Ctr KSC, Siberian Branch, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Kostyukov, A. S.; Isaev, I. L.; Ershov, A. E.; Gerasimov, V. S.; Polyutov, S. P.; Karpov, S. V.; Карпов, Сергей Васильевич; Ministry of Science and High Education of Russian Federation [FSRZ-2020-0008]; RFBRRussian Foundation for Basic Research (RFBR); Krasnoyarsk Territory and Krasnoyarsk Regional Fund of Science [20-42-240003]
}
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T − E phase diagrams and electrocaloric effect in PNN-PT solid solutions / M. V. Gorev, V. S. Bondarev, I. N. Flerov [et al.] // J. Alloys Compd. - 2022. - Vol. 927. - Ст. 167032, DOI 10.1016/j.jallcom.2022.167032. - Cited References: 40. - The authors are thankful to Dr. Anna Kalvane (Institute of Solid State Physics, University of Latvia) for preparation and characterization of the samples. This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors . - ISSN 0925-8388
Кл.слова (ненормированные):
Ferroelectrics -- Thermodynamic modeling -- Phase diagrams -- Electrocaloric -- Calorimetry
Аннотация: Using the sixth-order free energy expansion of the Landay thermodynamic potential, T − E phase diagrams and the electrocaloric effect (ECE) in solid solutions (1-x)Pb(Ni1∕3Nb2∕3)O3-xPbTiO3 (PNN-PT) were studied under an electric field along the crystallographic directions [001], [101] and [111]. The composition of the samples, temperature range, as well as magnitude and direction of the electric field significantly affect the sequence of phase transitions, stability of various crystalline phases and electrocaloric properties. Direct measurements of the intensive ECE in the 0.8PNN-0.2PT compound were carried out by the method of adiabatic calorimetry at electric field strength E = 6 kV/cm. The large electrocaloric coefficient ΔT∕ΔE = 10 μK ⋅ cm/kV indicates that this compound and other PNN-PT solutions are promising for application as solid-state refrigerants.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Institute of Engineering Physics and Radioelectronics, Siberian Federal University, Krasnoyarsk, Russian Federation
Institute of Solid State Physics, University of Latvia, Riga, LV-1063, Latvia

Доп.точки доступа:
Gorev, M. V.; Горев, Михаил Васильевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Flerov, I. N.; Флёров, Игорь Николаевич; Bormanis, K.; Birks, E.
}
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    Буханов, Евгений Романович.
    Моделирование оптических свойств на основе биологических структур / Е. Р. Буханов // IX Международная молодежная научная конференция "Физика. Технологии. Инновации" (ФТИ-2022) : тезисы докладов. - Екатеринбург, 2022. - Секция: Биоинженерия и биотехнологии. - С. 993-994. - Библиогр.: 5
   Перевод заглавия: Modeling optical properties of biological structures
Аннотация: Numerical calculations of the optical characteristics were made of the plant chloroplast structure based on thylakoids and the stromal distance between grana. The results showed that even on such small structures there are resonance phenomena in the visible wavelength range.

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Держатели документа:
Институт Физики им. Л.В. Киренского ФИЦ КНЦ СО РАН, Красноярск, Россия
Федеральный исследовательский центр КНЦ СО РАН, Красноярск, Россия

Доп.точки доступа:
Bukhanov, E. R.; "Физика.Технологии. Инновации", международная молодежная научная конференция(9 ; 2022 ; 16-20 мая ; Екатеринбург)Уральский федеральный университет им. первого Президента России Б.Н. Ельцина
}
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Satsuk, S. A.
Micromagnetic modeling of the polycrystalline structure effect to the hysteresis loop in ferromagnetic nanowire / S. A. Satsuk, S. V. Komogortsev // Journal of Physics: Conference Series. - 2021. - Vol. 1847, Is. 1. - Ст. 012045, DOI 10.1088/1742-6596/1847/1/012045. - Cited References: 32. - This work was supported by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research project 18-42-240006
Кл.слова (ненормированные):
Crystallite size -- Ferromagnetic materials -- Ferromagnetism -- Hysteresis -- Hysteresis loops -- Nanowires -- Ferromagnetic nanowire -- Magnetic anisotropy constant -- Magnetic anisotropy energy -- Micromagnetic modeling -- Micromagnetic simulations -- Non-monotonic dependence -- Numerical calculation -- Polycrystalline structure -- Magnetic anisotropy
Аннотация: Extensive micromagnetic simulation results of the hysteresis loops in ferromagnetic nanowire with randomly oriented crystallites ordered in one chain is presented. Three main contributions to the magnetic energy of the wire had been taken into account: exchange, dipole-dipole, and the magnetic anisotropy energy of the crystallite. In cases where one of the three contributions to the energy can be neglected, the numerical calculations are in good agreement with the results of the well-known, analytically studied micromagnetic problems. In the case when all three contributions are comparable, a complex non-monotonic dependence of the coercive force on the crystallite size and the magnetic anisotropy constant is observed. In order to interpret these changes, a new micromagnetic scale is introduced, which takes into account all three contributions to the magnetic energy of the wire, and performs a correct transition to the analytically studied limits, which take into accountthe competition of any two contributions.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Komogortsev, S. V.; Комогорцев, Сергей Викторович; Сацук, Светлана Александровна; Dynamic Systems and Computer Science: Theory and Applications(2021 : Oct. 19-22 ; Irkutsk, Russian Federation)
}
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    Simulation of fullerene formation in a carbon-helium plasma / P. V. Novikov, I. V. Osipova, G. N. Churilov, A. I. Dudnik // Fuller. Nanotub. Carbon Nanostruct. - 2021. - Vol. 29, Is. 5. - P. 337-342, DOI 10.1080/1536383X.2020.1842738. - Cited References: 22 . - ISSN 1536-383X
   Перевод заглавия: Моделирование образования фуллерена в углеродно-гелиевой плазме
Кл.слова (ненормированные):
Fullerene formation -- kinetic model -- carbon clusters -- Kinetic modeling -- Fullerenes
Аннотация: A kinetic model of fullerene formation in the carbon-helium plasma of an arc discharge was proposed. In the model, in addition to the coagulation of carbon clusters, the cluster isomerization and their cooling with a buffer gas were taken into account. The simulation results of the fullerene formation are in qualitatively agreement with the experimental data, i.e., the fraction of higher fullerenes increases at high pressures in the fullerene mixture.

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Держатели документа:
Krasnoyarsk Institute of Railway Transport, Krasnoyarsk, Russian Federation
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation

Доп.точки доступа:
Novikov, P. V.; Osipova, I. V.; Осипова, Ирина Владимировна; Churilov, G. N.; Чурилов, Григорий Николаевич; Dudnik, A. I.; Дудник, Александр Иванович
}
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Applying joint theoretical experimental research to aptamer modeling / I. A. Shchugoreva, P. V. Artyushenko, F. N. Tomilin [et al.] // Sib. Med. Rev. - 2021. - Vol. 2021, Is. 2. - P. 105-106 ; Сиб. мед. обозрение, DOI 10.20333/2500136-2021-2-105-106. - Cited References: 4 . - ISSN 1819-9496
Кл.слова (ненормированные):
LC-18 -- DNA aptamer -- lung adenocarcinoma -- SAXS -- DFTB3
Аннотация: The aim of the research. In this work we studied the structure of LC-18 DNA aptamer, which exhibits specific binding to lung adenocarcinoma cells. Obtain-ing the 3D structure of the aptamer is necessary for understanding the mechanism of binding of the aptamer to the target. Therefore, the aim of the research was modeling of the LC-18 aptamer spatial structure using combination of theoretical methods: DNA folding tools, quantum-chemical calculations and molecular dynamic simulations. Material and methods. The secondary structure of the LC-18 aptamer was predicted by using OligoAnalyzer and MFold online software under the conditions typical small-angle X-ray scattering (SAXS) experiment. The molecular modeling of the aptamer was carried out using the Avogadro program. For prediction of the structure two computational methods were used: quantum-mechanical method with third-order density-functional tight-binding (DFTB3) and molecular dynamics (MD) with force fields. Results. In this paper it was shown that molecular simulations can predict structures from the SAXS experiments. OligoAnalyzer and MFold web servers have been used to generate a set of several likely models. However, more accurate calculations have showed that these models do not predict the relative importance of isomers. Meanwhile, application of quantum-chemical and molecular dynamics calculations have showed reliable molecular structures which have a small deviations from the experimental SAXS curves. Conclusion. This study demonstrates the approach for modeling 3D structures of DNA-aptamers in solution using both experimental and theoretical meth-ods. It could be very helpful in designing more efficient aptamers based on results obtained from molecular simulations.

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Держатели документа:
Laboratory for Digital Controlled Drugs and Theranostics, Federal Research Center "Krasnoyarsk Science Center SB RAS”, Krasnoyarsk, 660036, Russian Federation
Department of Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Laboratory of Physics of Magnetic Phenomena, Kirensky Institute of Physics, Krasnoyarsk, 660012, Russian Federation
Nanoscience Center and Department of Chemistry, University of Jyvaskyla, Jyvaskyla, 40014, Finland
Department of Chemistry, Lomonosov Moscow State University, Moscow, 119234, Russian Federation

Доп.точки доступа:
Shchugoreva, I. A.; Artyushenko, P. V.; Tomilin, F. N.; Morozov, D. I.; Mironov, V. A.; Moryachkov, R. V.; Морячков, Роман Владимирович; Kichkailo, A. S.

}
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Domain structure and magnetization reversal in multilayer structures consisting of thin permalloy films separated with nonmagnetic interlayers / B. A. Belyaev, N. M. Boev, A. V. Izotov, P. N. Solovev // Russ. Phys. J. - 2021. - Vol. 64, Is. 6. - P. 1160-1167, DOI 10.1007/s11182-021-02436-w. - Cited References: 30. - This work was financially supported by the Ministry of Science and Higher Education under agreement No. 075-11-2019-054 November 22, 2019 . - ISSN 1064-8887. - ISSN 1573-9228

РУБ Physics, Multidisciplinary
Рубрики:
MICROMAGNETIC CALCULATION
   MAGNETOMETER
   SIMULATION
   NOISE
Кл.слова (ненормированные):
micromagnetic modeling -- multilayer magnetic film -- domain structure -- hysteresis loop -- microstrip resonator -- magnetic field sensor
Аннотация: Using numerical micromagnetic modeling, we have investigated the development of domain structure and magnetization reversal in multilayer thin-film structures. The permalloy (Ni80Fe20) magnetic layers had the inplane uniaxial and perpendicular magnetic anisotropy. We found that as the thickness of nonmagnetic interlayers decreases, the in-plane configuration of magnetic moments in the permalloy layers transforms from a single domain state to stripe domains, which is caused by the increase of magnetostatic interaction between layers. In structures with "thick" interlayers, even weak magnetostatic interaction enforces the neighboring single domain permalloy layers to have opposite orientations of magnetic moments. The saturation field of such samples increases linearly with the number of layers. By analyzing the dynamic characteristics of multilayers, we determined the optimum number of layers ensuring the maximum conversion efficiency of wideband microwave microstrip sensors of weak magnetic fields.

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Публикация на русском языке Доменная структура и процессы перемагничивания многослойных систем из тонких пленок пермаллоя с немагнитными прослойками [Текст] / Б. А. Беляев, Н. М. Боев, А. В. Изотов, П. Н. Соловьев // Изв. вузов. Физика. - 2021. - Т. 64 № 6. - С. 170-176

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys Fed Res Ctr KSC, Siberian Branch, Krasnoyarsk, Russia.
Siberian Fed Univ, Krasnoyarsk, Russia.

Доп.точки доступа:
Belyaev, B. A.; Беляев, Борис Афанасьевич; Boev, N. M.; Боев, Никита Михайлович; Izotov, A. V.; Изотов, Андрей Викторович; Solovev, P. N.; Соловьев, Платон Николаевич; Ministry of Science and Higher EducationMinistry of Science and Higher Education, PolandEuropean Commission
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10.

Microstructural parameters for modelling of superconducting foams / M. R. Koblischka, A. Koblischka-Veneva, Q. Nouailhetas [et al.] // 7th International workshop on numerical modeling of high temperature superconductors (HTS 2020) : [Theses]. - 2021. - Cited References: 9
Аннотация: Modelling the mechanical and superconducting properties of superconducting, open-cell foam samples requires a proper description of their speciﬁc microstructure. For this purpose, foam samples are investigated using optical microscopy, SEM and x-ray tomography, enabling to identify the parameters important for modelling.

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Koblischka, M. R.; Koblischka-Veneva, A.; Nouailhetas, Q.; Berger, K.; Douine, B.; Gokhfeld, D. M.; Гохфельд, Денис Михайлович; International Workshop on Numerical Modelling of High Temperature Superconductors(7 ; 2021 ; June ; 22-23 ; Nancy, France (virtual))
}
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