bluuebunny/crossref_metadata_2025_split huggingface dataset:
The peculiarities of spectral dependences of the transverse Kerr effect of Au-Co nanostructures
Authors: Yurasov A N , Yashin M M , Ganshina E A , Mokrushina A A , Semenova D V 
Published: December 2019

Abstract
The paper is concerned with the experimental spectral dependence of the magneto-optic Kerr effect for samples of nano-layered films of Co-Au. Theoretical spectral dependences of the ‘Transversal Kerr Effect’ are constructed. Spectral dependences taking into account the size effect are given. Theoretical and experimental data are compared. There is good agreement between experimental and simulated results. The relevance of this research area and the results obtained are noted. Discussed the possibility of using such nano-layered thin films structures.
Molecular dynamics simulation of thermal diffusion processes in non-isothermal flow of the medium
Authors: Sidorov A V , Grabov V M , Zaitsev A A , Kuznetsov D V 
Published: December 2019

Abstract
The article presents a brief information on the discovery and experimental study of a new thermoelectrokinetic effect consisting in the formation of thermoelectrokinetic EMF in viscous conductive media in the presence of mass transfer (particles) and the action of a temperature gradient. On the basis of the molecular dynamics method, a mathematical model is developed and a numerical simulation of the non-isothermal flow of the Lennard-Jones fluid under the conditions of thermoelectrokinetic effect formation is carried out. As a result of the simulation the microscopic regularities of its formation are established.
Study of irreversible degradation processes in gate dielectric of MIS structures
Authors: Andreev D V , Stolyarov A A , Andreev V V , Tsarkov A V 
Published: December 2019

Abstract
In this paper we propose an improved method for accelerated tests of the MIS structure gate dielectric and for studying the irreversible processes in it. This method is based on applying a ramping current load to a sample with a short injection measurement mode between the increments of the current load. This method allows obtaining a time history of the voltage drop across MIS structure at a constant level of measurement injection current for the whole current load range. This time history can be used to find the parameters characterizing irreversible processes of charge degradation such as density and localization of a charge accumulating in the dielectric film, cross-sections of electron and hole traps, nature of the evolution of charge effects and etc.
The research of time dependence polymeric membrane swelling in water with various deuterium content
Authors: Bunkin N F , Babushkin D P , Bereza I S , Bolikov N G , Bashkina U A , Tuan Vu Minh , Gudkov S V , Kozlov V A 
Published: December 2019

Abstract
Experiments on the Fourier transform spectrometry of Nafion, a water-swollen polymeric membrane, are described. The transmittance spectra of liquid samples and Nafion, soaked in these samples, were examined, depending on the deuterium content in water within the spectral range 1.8 - 2.15 μm. The experiments were carried out according to two protocols: with the first protocol we studied the dynamics of Nafion swelling in H2O + D2O mixtures for the deuterium concentrations 3 < C < 104 ppm, and with the second protocol we studied the dynamics of swelling in pure heavy water (C = 106 ppm). For liquid mixtures in the concentration range 3 < C < 104 ppm, the transmittance spectra are the same, but for Nafion soaked in these fluids, the corresponding spectra are different. It is shown that, in the range of deuterium contents C = 90 - 500 ppm, the behavior of transmittance of the polymer membrane is non-monotonic. In experiments with the second protocol, the dynamics of diffusion replacement of residual water, which is always present in the bulk of the polymer membrane inside closed cavities (i.e., without access to atmospheric air), was studied.
Modeling the underwater acoustic communication under ice cover on the Arctic shelf
Authors: Volkov M V , Kalinina T S , Lunkov A A , Petnikov V G 
Published: December 2019

Abstract
Numerical simulations of the underwater acoustic communication are carried out for a shallow water waveguide with a rough ice cover. The acoustic model is based on a coupled normal mode approach. Binary phase-shift keying is implemented to code the information. The bit error rate in an ice-free waveguide is found to be an order higher than in the case of a rough ice cover. The reason for that is the difference between impulse responses. The impulse response of the ice-covered channel is narrower than in the unperturbed case, which is due to the increased energy transfer from the lower modes to the higher, strongly attenuating modes
Response of macroscopic nonlocal correlation detector to a phase transition
Authors: Korotaev S M , Gorohov J V , Serdyuk V O , Novysh A V 
Published: December 2019

Abstract
Macroscopic entanglement represents itself in nonlocal correlation of the entropy productions of classically insulated dissipative processes. Nonlocal correlation detector is a device including some, well protected from any local impacts, spontaneous dissipative probe-process, the entropy variation in which is related with a measurable variable (signal). Experimentally convenient example of the source-process is a phase transition. The experiment on measuring of response of electrode macroscopic correlation detector to the process of liquid nitrogen evaporation has been carried out. The signal extremum is reached much later than the end of evaporation. The detector response begins at once as the evaporation beginning, while classical local temperature impact has retardation equal to 1.5 hours. The form of response is essentially asymmetric, with long relaxation time.
Novel Eu3+ complex based on β – diketonate ligand for OLED application
Authors: Korshunov V M , Ambrozevich S A , Kareva E R 
Published: December 2019

Abstract
It was demonstrated that bonding Eu3+ ion to β – diketonate ligand as main ligand and 4,7-Diphenyl-1,10-phenanthroline (bathophenanthroline) as ancillary ligand leads to a significant increase of extinction and luminescence intensity. To order the potential of this complex to OLED application, we fabricated and investigated the electroluminescent device based on this compound. We achieved a high value of photoluminescence quantum yield (56 %) and external quantum efficiency value of 1% at 12 V.
Simulation of the electrostatic fields in devices with complex geometric shapes
Authors: Sorokin D L , Skuybin B G , Galkin N K , Litvinov V N , Dushkin M A , Ryabokon M S 
Published: December 2019

Abstract
The problems of physical and mathematical simulation of electrostatic field were considered. The antetype of experimental assembly of field investigation was created. The calculation algorithm for numerical solution of the problem based on the mathematical model of the field and Green theorem was created. The algorithm was implemented as computer program. The results of the numerical and live experiments were obtained and compared.
Registration of patents for inventions and utility models by students of higher educational institutions
Authors: Ryabokon’ M S , Skuybin B G , Sorokin D L , Galkin N K 
Published: December 2019

Abstract
This article reviews detailed order of registration of patents for inventions and utility models. General issues of patenting are considered and specific recommendations on the preparation of patent application documents are given. The registration of patent is illustrated by the example of a laboratory setup for the demonstration of electrostatic fields, which was modernized by students of BMSTU in the Student Laboratory of Physics (SELP).
Dynamics of plasma piston composition
Authors: Gerasimov Yu V , Maslov A G , Kachesov A E , Melnikov V V 
Published: December 2019

Abstract
The article is devoted to the stratification of plasma formation in the railgun channel. The motion model for a composition of plasma pistons interacting with each other, rails and railgun walls was proposed. It was shown that the maximum impulse that could be transmitted to the throwing body in this system substantially depends on the initial position of the plasma pistons, according to the simulation results. The rational initial system configuration is obtained, at which the maximum value of the momentum transferred to the throwing body is reached. Possible options for obtaining such a configuration and a qualitative model of the stratification of a single plasma formation into several plasma pistons were proposed.
Mathematical model of the optical radiation propagation in the microsatellite moving in near-earth orbit
Authors: Gladyshev V O , Strunin A G , Sharandin E A , Sokolov A L , Murashkin V V , Beloklokova U I 
Published: December 2019

Abstract
The paper considers the problem of the laser radiation propagation from the Earth surface to a Luneburg lens moving at a speed V along a geosynchronous orbit, and the registration by a ground-based observer of radiation reflected by a lens. Preliminary calculations show that the beams reflected by the moving lens deviate at different angles, which leads to the mixing of the beams on the Earth’s surface in the region of the radiation recorded. That, in turn, affects the appearance of the interference pattern and the process of recording the radiation reflected by the lens. Therefore, the purpose of this work is to calculate the formed optical response in the reception area of the radiation, taking into account the optical effects of the moving media: the Fizeau effect, the Doppler effect, violation of the Snell’s law, the kinematic effect of the beam points displacement on the optical surface caused by the final velocity of radiation in the lens.
Experimental Approach for Obtaining a Complex (Dusty) Plasma Fluid
Authors: Yakovlev Egor V. , Ovcharov Pavel V. , Dukhopelnikov Dmitrii V. , Yurchenko Stanislav O. 
Published: December 2019

Abstract
An experimental approach is proposed to obtain a complex (dusty) plasma fluid. In contrast to previously employed laser heating of a complex (dusty) plasma crystal, this approach is based on the mode-coupling instability of the crystal and does not require any additional influence. We consider a typical experiment and report results of post-processing, including the Voronoi-cell area distribution and order parameter, justifying a liquid state of the system existing for a long enough time. The results can be useful for studies of phenomena and properties of fluids at different couplings, such as excitation spectra, density–density correlations, diffusion, and relations between them.
Developing specialized software for investigating interference in complex optical systems
Authors: Koziy Andrey , Minchenko Ilya , Alekhin Vladislav , Larin Roman , Kiktenko Evgeny 
Published: December 2019

Abstract
The paper describes a physical model and primary calculation algorithms we developed and implemented in a software package for simulating interference in complex optical systems. A model of a highly monochromatic laser beam interacting with various optical elements is proposed. We verified and validated our model by creating an interference pattern on a screen. Model verification involved an experiment with a Mach-Zehnder interferometer. Model validation consisted of simulating our own optical experiment.
Luminescent properties of nanocomposite - Bi12SiO20, filled with C6H9EuO6 × H2O
Authors: Moiseienko Vasyl N , Gorelik Vladimir S , Sal Bilal Abu , Ohiienko Oleh V , Golochalov Dmitro O 
Published: December 2019

Abstract
The work presents the results of the study of the photoluminescence spectra of the (111) growth surface of an opal - Bi12SiO20 matrix nanocomposite filled with europium (III) acetate hydrate (C6H9EuO6 × H2O). An increase in the integral luminescence intensity of the matrix composite opal - Bi12SiO20: Eu3+ compared to composite opal: Eu3+ was found. The measured photoluminescence spectra of the Bi3+ ions in the opal pores indicate its participation in optical processes as a co-activator of luminescence. A change in the character of the splitting of the main luminescence bands of Eu3+ ions in the region of 575–635 nm and the integral luminescence intensity after dehydration of the crystalline hydrate in opal pores has been established.
Cost-Efficient Numerical Schemes for the Boundary Integral Equation Solution in 2D Vortex Methods
Authors: Kuzmina Kseniia , Marchevsky Ilia , Moreva Victoriya , Ryatina Evgeniya 
Published: December 2019

Abstract
The problem of the flow simulation around airfoils using Lagrangian vortex methods is considered. Numerical schemes of the second order of accuracy for free vortex sheet intensity distribution along the airfoil are developed for smooth and non-smooth airfoils. The schemes are based on the Galerkin approach with piecewise-constant and piecewise-linear basis functions. The finite element method ideas are used and the resulting piecewise-linear scheme has the same numerical complexity as the scheme with piecewise-constant numerical solution. The modification of a FEM-type scheme is developed for non-smooth airfoils which permits to take into account the discontinuity of the solution at the specified points; its computational cost increases insignificantly.
Probability representation of quantum mechanics and star product quantization
Authors: Chernega V N , Belolipetskiy S N , Man’ko O V , Man’ko V I 
Published: December 2019

Abstract
This paper presents a review of star-product formalism. This formalism provides a description for quantum states and observables by means of the functions called’ symbols of operators’. Those functions are obtained via bijective maps of the operators acting in Hilbert space. Examples of the Wigner-Weyl symbols (Wigner quasi-distributions) and tomographic probability distributions (symplectic, optical and photon-number tomograms) identified for the states of the quantum systems are discussed. Properties of quantizer-dequantizer operators required for construction of bijective maps of two operators (quantum observables) onto the symbols of the operators are studied. The relationship between structure constants of associative star-product of operator symbols and quantizer-dequantizer operators is reviewed.
Mathematical modeling of the beam spatial distribution for the laser with ceramic active elements
Authors: Sharandin E A , Kauts V L , Gladysheva T M , Kaiutienko A V , Portnov D I 
Published: December 2019

Abstract
Numerical calculations of the formation of the radiation spatial distribution in the near field by laser amplifiers of pulsed solid-state lasers are performed. On the basis of mathematical modeling, a method is proposed for ensuring spatial homogeneity of laser radiation, based on the use of ceramic active elements with a non-uniform distribution of population inversion over the active element cross-section. The method allows for increasing the spatial homogeneity of laser beams of amplifiers operating in the saturated gain mode.
On the road to low temperature district heating
Authors: Cenian Adam , Dzierzgowski Mieczysław , Pietrzykowski Bartosz 
Published: December 2019

Abstract
The roadmap to implementation of low temperature (LT) grid taking into account existing district heating (DH) systems is analysed in the paper. Lessons learned from pilot cases in Albertslund, HojeTaastrup, Kalundborg and Łomża are presented. Also in Albertslund and Hoje Taastrup LTDH grids constituting subgrids of the main (third generation) DH grids, and the last is fed from the DH return-flow. In Kalundborg an independent ultra-LTDH grid is considered to utilize the low temperature surplus heat (around 20°C) as supply for Municipalities located nearby. In Poland the effects of a lower supply temperature in an entire DH grid were investigated. This lower supply temperature was effective on account of the existing DH-grid infrastructure being oversized.
Modelling of hydrogen flame in perfectly clean combustion regimes using LES-CMC
Authors: Wawrzak Agnieszka , Tyliszczak Artur 
Published: December 2019

Abstract
The LES coupled with the first-order CMC method and detailed chemical mechanism is used for the calculations of hydrogen jet burning in the atmosphere of water vapour and oxygen mixture. The flame is initiated by a spark, then it spreads and propagates through the domain and eventually stabilises as a lifted or attached one. Three dimensional calculations were proceeded with analysis of the flame in the mixture fraction space. The main focus of the paper is on the effect of oxidizer composition on the flame characteristics and stabilization mechanisms. The flame structure during the propagation phase is represented based on the so-called pre-ignition species. Time-averaged results show the flame lift-off distance, shape and radial size. It is found that these factors may be effectively controlled by the amount of water vapour in the co-flowing oxidizer.
Sustainable utilization of the sewage sludge using combined drying, torrefaction and plasma gasification technologies
Authors: Pawlak-Kruczek Halina , Czerep Michał , Ostrycharczyk Michał , Wnukowski Mateusz , Baranowski Marcin , Krochmalny Krystian , Niedzwiecki Lukasz , Kowal Mateusz 
Published: December 2019

Abstract
This paper presents complete mass and energy balance of a novel installation for thermal utilization of the sewage sludge. Calculations were performed for the typical output of a wastewater processing plant in a middle size Polish town. Overall, the proposed configuration seems to be advantageous, as the proposed installation is fully sustainable and does not need external energy sources, due to maximized heat recovery from many different sources. Optimization of the heat use is performed, by utilizing all the available heat sources, including low-quality heat, such as the latent heat of water vapors, present in wet air after drying. Despite using plasma gasification system, the installation is able to generate surplus electricity, which can be used as a power source for all of the auxiliary devices, such as fans, augers and PLC systems. The proposed system can be implemented in the water treatment plants, in towns with the total amount of inhabitants ranging from a couple of thousand up to 40 thousand. System does not require anaerobic digestion of the sewage sludge. Nonetheless, the use of anaerobic digestion brings some advantages as the producer gas from the gasification installation can be mixed with biogas.
New polymorphic varieties of fluorographene forming during fluorine functionalization of 4-8 graphene layers
Authors: Belenkov Maxim E , Chernov Vladimir M , Belenkov Evgeny A 
Published: December 2019

Abstract
Using the methods of the density functional theory in the generalized gradient approximation, the structure and electronic properties of six new polymorphic varieties of fluorographene, formed during the chemical adsorption of fluorine by a 4-8 graphene layer, are calculated. The sublimation energy of 4-8 polymorphs of fluorographene varies from 13.36 to 14.09 eV (CF)-1. The range of variation of the band gap of new CF-L4-8 polymorphs of fluorographene is greater than the similar interval for CF-L6 compounds.
Cylindrical thermal invisibility cloak based on transformation thermodynamics
Authors: Soboleva V Y , Tukmakova A S , Sharaevsky M V , Vozianova A V , Khodzitsky M K 
Published: December 2019

Abstract
The paper provides a theoretical proof that the methods of transformation optics can be used for thermodynamics. Thermal conductivity tensor is calculated for the development of the thermal invisibility cloak, which directs the heat flux around a certain area. The finite element method was used to simulate the cloak with parameters close to real. The simulation was performed by the finite element method for two cases: with gradient k and with copper/mica layered structure.
Structure and electronic properties of 4-8 and 4-6-12 layered varieties of boron nitride
Authors: Ryashentsev Dmitry S , Belenkov Evgeny A 
Published: December 2019

Abstract
The structure of two new layered polymorphic varieties of boron nitride was calculated by the density functional theory method using the gradient approximation. The structure of layers BN-L4-8 and BN-L4-6-12 differs from the structure of the hexagonal layer of boron nitride in that their surface is formed not only from hexagons. As a result of the calculations, it was found that the sublimation energy of the new layers (17.36 and 17.14 eV (BN)-1 for the layers BN-L4-8 and BN-L4-6-12, respectively) is less than the sublimation energy of hexagonal boron nitride ( 18.14 eV (BN)-1). The band gap of new boron nitride polymorphs is about 3.9 eV, which is less than the calculated width of the band gap in BN-L6 – 4.69 eV.
Synthesis and transport properties of FET based on Heusler alloy thin films formed by rapid thermal annealing
Authors: Lukyanenko A V , Tarasov A S , Shanidze L V , Yakovlev I A , Zelenov F V , Masugin A N , Ivanov A B , Baron F A , Volkov N V 
Published: December 2019

Abstract
In this work we show a preparation technique of Co2FeSi full-Heusler alloy thin films on silicon-on-insulator (SOI) substrates, employing rapid thermal annealing (RTA). The films of the Co2FeSi alloy were formed by a silicidation reaction, caused by RTA, between the ultrathin SOI (001) layer and the Fe/Co layers deposited on it. It is assumed that this technology is compatible with the process of formation of a half-metal source-drain in an advanced CMOS and SOI technology and will be applicable for the manufacture of a source-drain of a field-effect transistor. Schottky barrier field-effect transistors (FET) with a back-gate, based on silicon nanowires with source and drain of a Co2FeSi film, synthesized on an SOI substrate, were manufactured. The transport properties of the device were investigated.
Low-dimensional heterostructures obtaining from an intelligent material and carbon material on a silicon
Authors: Gurin S. A. , Pecherskaya E. A. , Fimin A.B. , Nikolaev K.O. , Shepeleva Y.V. , Artamonov D.V. 
Published: December 2019

Abstract
The results of the study of the technological regimes of the formation of a microcantilever beam of layered heterostructures based on the integration of smart material and silicon carbide are presented. Layers of silicon dioxide (SiO2), silicon nitride, silicon carbide, and platinum (lower electrode) are successfully formed on a silicon substrate. The results of an experimental study of the Pt / PZT / Pt / SiC heterostructures parameters confirmed the technological compatibility of the layers and the promise of using these structures in sensors of dynamic deformation when creating new generation sensors, including those operating in heavy rocket conditions of space technology.
Suppression of Stark effect in ultra-thin stress-free GaN/AlN multiple quantum well structures grown by plasma-assisted molecular beam epitaxy
Authors: Koshelev O A , Nechaev D V , Brunkov P N , Orekhova K N , Troshkov S I , Ivanov S V , Jmerik V N 
Published: December 2019

Abstract
We report on suppression of the Stark effect in (1.5-2)-monolayer(ML)-thick (GaN/AlN)100 multiple quantum well (MQW) structures grown on AlN/c-Al2O3 templates by plasma-assisted molecular beam epitaxy. Different stress relaxation mechanisms are revealed in these structures by using a multi-beam optical stress sensor in comparison with the 5ML-MQW structure. The former (with well thicknesses ⩽2MLs) demonstrate the nearly stress-free growth, whereas the latter structure with thicker wells exhibits the slow stress evolution from the high initial compressive stress to the nearly relaxed state with zero stress. Moreover, the former structures demonstrate a bright room-temperature cathodoluminescence (CL) with the single peak at the shortest wavelength 240 nm (1.5ML-QWs), while the latter shows much weaker multi-peak CL spectra in the spectral range of 270-360 nm.