bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of microadditive of carbon dioxide on the kinetics of boiling-up of superheated n-pentane
Authors: Perminov S A , Lipnyagov E V , Parshakova M A 
Published: November 2021

Abstract
The effect of a low-boiling impurity (CO2 gas <1.5% mol) on the kinetics of boiling-up of superheated n-pentane in a vertical glass tube have been studied by high-speed video (2050 fps). The method of continuous pressure decrease from 2.00 to 0.10 MPa (in the temperature range of 100.2-145.1 °C), as well as the method of measuring the lifetimes of superheated liquids at 0.10 MPa (90.2-134.1 °C) have been used. The inner surface of the tube has two visible defects, one of which defines the boundary of the attainable superheat. After degassing the system, the defects of tube cease to play an appreciable role, the active centers are redistributed. The temperature of the attainable superheat increases from the initial value by 20 °C in tests with gas and by 10 °C in subsequent tests without it. The result obtained may be related to physical gas adsorption on the glass surface during the process of evacuation of the system.
Low-frequency fluorescence spectrum of a laser driven polar quantum emitter damped by squeezed vacuum with finite bandwidth
Authors: Bogolyubov N N , Soldatov A V 
Published: November 2021

Abstract
A two-level quantum emitter with broken inversion symmetry driven by external semiclassical monochromatic high-frequency electromagnetic (e.g., laser) field and damped by squeezed vacuum reservoir with finite bandwidth is presented. The squeezed vacuum source is assumed to be either degenerate parametric oscillator (DPO) or a non-degenerate parametric oscillator (NDPO). It is shown that the shape of low-frequency fluorescence spectrum of the emitter can be effectively alternated by controlling the degree of the squeezed vacuum source degeneration and phase of the squeezing.
Superconductivity of twisted double bi-layer graphene in chiral model
Authors: Rybakov Yu P , Umar M 
Published: November 2021

Abstract
Taking into account the sp -hybridization effect for valence electrons in carbon atoms, a very simple chiral model of graphene was suggested some years ago [1]. This model used as a special order parameter the unitary SU(2) -matrix U with the kink-like (or domain wall) structure for the description of electrons in a mono-atomic graphene sheet. However, later the new graphene physics began since studying twisted multilayer configurations revealing unconventional superconducting properties (twist-tronics) [2]. Within the scope of the chiral model these twisted configurations can be described by the so-called “product ansatz” U = U1U2
▪ ▪ ▪ Un
. As an example, the special case of twisted double bi-layer graphene (TDBG) configuration is studied and the corresponding twist angles, for which the superconductivity takes place, are found.
Direct stochastic molecular modelling of transport processes in gases
Authors: Ya Rudyak V , Lezhnev E V 
Published: November 2021

Abstract
The stochastic molecular modeling method (SMM) of transport processes in rarefied gases developed by the authors is systematically discussed in this paper. It is shown that, it is possible to simulate the transport coefficients of rarefied gas with high accuracy, using a relatively small number of molecules. The data of modeling the thermal conductivity coefficient are presented for the first time. The second part of the paper is devoted to the generalization of the SMM method for modeling transport processes in confined conditions. To describe the dynamics of molecules in this case, the splitting of their evolution by processes is used: first, the movement of molecules in the configuration space is simulated, and then their dynamics in the velocity space is imitated. Anisotropy of viscosity and thermal conductivity in nanochannels has been established. The interaction of gas molecules with walls is described by specular or specular-diffuse reflection laws. Gas viscosity can be either greater than in the bulk or less, depending on the law of gas interaction with the channel walls.
Study of the pressure distribution along a concentric annular channel
Authors: Germider O V , Popov V N 
Published: November 2021

Abstract
A study of an isothermal rarefied gas flow through a long concentric annular channel is carried out. The solution is based on the linearized BGK model with diffuse boundary conditions and it is valid in the whole range of the rarefaction parameter. The pressure distribution along the channel is obtained and investigated depending on the values of the pressure maintained at the channel ends.
Semiclassical Qubits
Authors: Kamalov T F 
Published: November 2021

Abstract
The semiclassical approximation of quantum computing and quasi-qubits (s-bits) have been obtained by us as a result of our work over the past few years. This work can be conventionally divided into two parts. The first part, let’s call it the programming model, contains a computer model of quasi-qubits and quantum computing. The second part, let’s call it the microelectronic model, describes the microelectronic realization of qubits in the semiclassical approximation (quasi-qubits) and exists in the form of block diagrams, which are supposed to be easy to manufacture. How did we get the semiclassical approximation? The difficulty in solving such a problem was that microparticles in quantum mechanics are described in an infinite-dimensional Hilbert space. Classical models are much poorer in the number of variables; therefore, it is impossible to describe quantum mechanical objects by classical methods due to the small number of available parameters.
Physics of nonlinear oscillations with nonlocal variables
Authors: Volkova O A , Khamis Hassan M H , Kamalov T F 
Published: November 2021

Abstract
In cases where physical processes cannot be described by linear equations, and nonlinear equations are difficult to solve mathematically, we have to use approximate solutions to such problems. One such example is the description of the Kapitsa pendulum, which is a pendulum with a vibrating suspension point. In contrast to the previously known methods of describing such a problem, in this paper we propose to use additional variables in the form of higher derivatives, which allows us to obtain corrections that give a more detailed contribution to the description of this problem.
Based on kinetic theory computer models of a molecular beam in a collimator
Authors: Komarov E , Kloss Yu Yu , Tcheremissine F G , Govorun I V 
Published: November 2021

Abstract
The paper studies a molecular jet that is formed during a gas outflow through a circular tube from a vessel and determines geometric characteristics of the vessel that reduce the jet slope. Developed software is applicable for studying gas flow in various geometries and uses the GPU for computation.
Intermolecular interactions of layers octa-phenyl-2,3-naphthalocyaninato zinc
Authors: Chausov D N , Suleymanova S , Kazak A V , Savin A V , Vasilyeva I A , Kuznetsov M M 
Published: November 2021

Abstract
The orientation of octa-phenyl-2,3-naphthalocyaninato zinc molecules is modeled by the atom-atom potential method. The dependence of the interaction energy of octa-phenyl-2,3-naphthalocyaninato zinc molecules on the angles characterizing their orientation relative to each other is established. It is shown that the obtained values of the interaction energy allow us to qualitatively explain the formation of molecules in a columnar structure.
Molecular dynamics of DNA-binding protein and its 2D-crystals
Authors: Tereshkin E V , Tereshkina K B , Krupyanskii Y F 
Published: November 2021

Abstract
In this work the dodecamers and the two-dimensional crystals of DNA-binding protein from starved cells (DPS) of Escherichia coli bacteria were investigated. The DPS monomer contains 167 amino acids residues. It can form dimers, trimers, and dodecamers. The versatility of the DPS protein structure can be used to design nanomaterials with structures and functions not found in living nature. The ability of this protein to self-assemble into complex shapes and structures defined on the nanometer scale can make them highly demanded for various technological applications. It was used all-atom classical molecular dynamics simulation on 0.1 microsecond scale to obtain the spatial and energy characteristics of the proteins and the components of the simulation box. The fluctuation mobility of DPS protein at various temperatures was discussed. The diffusion of ions in the presence of dodecamers and 2D crystals was compared. It has been shown that this protein retains its ability to accumulate ions in a wide range of biological temperatures from 277 to 369K. It also retains the mobility of key amino acid residues involved in the formation of nanocrystals and the transport of ions into the cavity, even at low physiological temperatures.
The influence of Fermi surface anisotropy and the charge carrier surface scattering kinetics on the electrical conductivity of a thin metal film in the view of the quantum size effect
Authors: Kuznetsova I A , Savenko O V , Romanov D N 
Published: November 2021

Abstract
The electrical conductivity of a thin metal film in an alternating electric field is calculated considering the quantum size effect. The Fermi surface of the metal has the shape of an ellipsoid of rotation, the main axis of which is parallel to the plane of the film. The quantum kinetic equation obtained from the von Neumann equation (the Liouville quantum equation) is solved. The Soffer model is used as the boundary conditions for the distribution function. The dependence of the electrical conductivity on the film thickness is analyzed. A comparison is made with experimental data on the electrical conductivity of bismuth thin films.
Method of the electron distribution function calculation in a problem of the kinetic rarefied plasma plume modeling
Authors: Bishaev A M , Abgaryan M V 
Published: November 2021

Abstract
A problem related to the rarefied plasma plume of the stationary plasma thruster (SPT) is considered in the paper. The consideration is conducted fully in terms of kinetics, namely, distribution functions are introduced to describe motion of every plasma component. The system of kinetics equations for the distribution functions should be solved in combination with the Maxwell’s equations. The paper discusses methods for solving the stated problem.
Moving an atom by swapping places across a crystal lattice without vacancies
Authors: Askerova V I , Kalashnikov E V 
Published: November 2021

Abstract
The mechanism of moving an atom through a crystal lattice without vacancies is considered. This situation can be observed when all sites of the lattice are occupied by atoms of the same type, or when some of them are occupied by isotopes of the same atoms. It is shown that in a three-dimensional crystal lattice constructed from identical atoms without vacancies, one-dimensional motion of the own atom along the lattice chain is possible. This movement is realized as a Frenkel-Kontorova soliton.
MATLAB Wavelet analysis of electron energy spectrum in one-dimensional quantum well with infinitely high walls for Al-Ga-As system (0 < x < 1)
Authors: Kozhanova E R , Tkachenko I M , Belyaev V V , Maignan S 
Published: November 2021

Abstract
This paper presents calculations of electronic states in AlxGa1-x As semiconductor nanostructures and simulates the envelope wave functions of quantum energy levels in a one-dimensional quantum well with infinitely high walls of a given width at various values of x. For the analysis of results the authors choose the function wtmm from the Matlab library that fixes the extremums and which is a characteristic of the fractality of the envelope wave functions of quantum energy levels.
Structural transformations in the system lanthanum bromide – water – electrical field
Authors: Vinokurov S A , Klassen N V , Orlov A D 
Published: November 2021

Abstract
We found several manifestations of severe influence of relatively week direct electrical fields on interactions of water with lanthanum bromide. The rate of dissolution of these crystals in water at the negative electrode exceeds this value at the positive electrode by several times. Pulse-like growth of solid micro-rods at the negative electrode from the solution of lanthanum bromide subjected to direct electrical field was observed. Auto-oscillations between the contents of water bound in hydrated lanthanum bromide and free water were found. These oscillations are attributed to severe difference of the electrical polarizabilities of free and bound water.
Spatial and spectral features of the luminescence of liquid nitrogen stimulated by infrared lasers
Authors: Klassen N V , Provotorov P V 
Published: November 2021

Abstract
Spectral features of cryogenic liquids, especially nitrogen, seem to be clearly investigated due to the wide application in science. On the other hand, material properties can really be different under intensive laser irradiation. During irradiation of liquid nitrogen with pulsed (pulse duration 20 ns) YaG: Nd 1064 nm laser with average power of 0.3 W we have found bright luminescence in the visible region with five narrow spectral lines. This phenomenon can be explained by the multiphoton excitation of nitrogen molecules and ions with infrared photons. Its spatial and spectral characteristics are attributed to Amplified Spontaneous Emission. The main features include super-linear dependence of the emission intensity on the intensity of the excitation radiation, limited amount of narrow spectral bands and conical geometry of the emission with the clear separation of the cones in correspondence with the spectral lines of the emission. This phenomenon manifests liquid nitrogen as the convenient substance of Kerr type for studies of various non-linear optical processes by means of nanosecond lasers instead of femtosecond lasers applied usually for these purposes.
Self- concentrated mass-transfer during deformation treatments of organic-inorganic compositions
Authors: Tsebruk I S , Pokidov A P , Kedrov V V , Klassen N V 
Published: November 2021

Abstract
This paper prolongs the series of our previous papers where we found super-fast and super-deep introduction of foreign substances in crystalline materials by means of the ball rolling. A set of new experimental results was used to justify the new version of the mechanism of this introduction with the record speed and depth. The main process which determines this phenomena is connected with the sequence of openings and closings of nanocracks at the surface subjected to the rolling and the capture of the substance introduced from the surface by these cracks. The process of this introduction with the record parameters is supported by the intense chemical interactions between the matrix and the substance being introduced. This chemical interaction is intensified by several times with the deformation treatments. The analogous super-fast mass transfer is observed in the situation of the pulling out of the polystyrene fibers from the solution of polystyrene in benzene when the interaction of the organic components with cesium iodide nanoparticles was activated by the deformation treatment of the solution during its pulling out resulting in the formation of big amounts of nano-channels promising for effective utilization of hazardous radioactive wastes.
Effect of aluminum alloying on the structure and properties of rapidly quenched TiNiCu alloy
Authors: Shelyakov A V , Sitnikov N N , Zaletova I A , Eroshenkov S A , Sevryukov O N 
Published: November 2021

Abstract
The efficiency of shape memory alloys for the MEMS technology has been recently demonstrated. Quasibinary intermetallic TiNi-TiCu alloys produced by rapid quenching from liquid phase in the form of thin (about 40 um) ribbons are an attractive material for the fabrication of micro-actuators due to their narrow temperature hysteresis of the shape memory effect (SME) and relatively large recoverable strain. In order to broaden the functionality of SME microdevices, in this work we have alloyed TiNiCu containing 25 at.% copper with aluminum. The results have shown that alloying with 0.6 at.% Al increases the cast characteristics of the composition and favors its amorphization. Upon crystallization by isothermal annealing or electropulse treatment the resultant microstructure and SME properties of the Al containing alloy change but slightly in comparison with the original alloy however there is a significant shift (by more than 15°C) of the SME temperature range toward lower temperatures.
Study of the properties of Ce3+-doped fluoride nanophosphors: phase composition, morphology, luminescence
Authors: Dorokhina A M , Bakhmetyev V V , Kominami H , Toru A , Hisashi M 
Published: November 2021

AbstractTo date, nanophosphors have found application in various fields, one of which is medicine. These phosphors were developed with the aim to become one of the components of a drug for photodynamic therapy of oncological diseases. The aim of this work was to study the effect of the duration, environment, and stabilizers of solvothermal synthesis on the microstructure and luminescent properties of the YF3:Ce nanophosphor. The solvothermal synthesis technique was carried out in three different media: water, ethanol, and ethylene glycol. The optimal duration of the synthesis was also determined (the synthesis was carried out at a temperature of 200°C for 4…20 hours). The dependence of the YF3luminescence on the phase composition and the solvothermal synthesis medium was studied. Using SEM, the morphology and particle size of YF3:Ce phosphors were studied depending on different stabilizers (polyethylene glycol, polyethyleneimine, polyvinylpyrrolidone). The luminescence intensity of YF3:Ce and Na(Y1,5Na0,5)F6:Ce samples was compared.
Predictor of reliability indicators for nanoelectronic heterostructure devices with transverse current transfer under conditions of limited experimental information based on Bayesian inversion
Authors: Vetrova N A , Filyaev A A , Shashurin V D , Luneva L A 
Published: November 2021

AbstractPredictor of the reliability indicators of resonant tunneling diodes with a generalization of the methodology for nanoelectronic heterostructure devices with quantum confinement and transverse current transfer has been developed. The advantage of the developed software is the possibility of interactive input of additional experimental information for further calculation of point and interval estimates of the reliability indicators of semiconductor devices using Bayesian inversion, which allows predicting these indicators under conditions of limited experimental information.
Methods and facilities of the automated control for thin film indicators
Authors: Maksimova O V , Nikolaev P V , Moiseenko S V , Belyaev V V 
Published: November 2021

Abstract
The algorithms, methods for measuring the structure parameters of thin-film electroluminescent indicators are studied. The algorithm for determining threshold voltage and plotting current – brightness characteristics was created. Realization of this algorithm accelerates process of monitoring of parameters by production known and development of new exemplars of indicator technique on the basis of thin-film electroluminescent indicators. The main aspects of a comprehensive approach to problem solving of automation of process of measurement of values of parameters of structures of thin-film electroluminescent indicators were designated, features of functioning of thin-film electroluminescent indicators as a basis of formation of structure of the device of the automated testing are considered, automation of processing of results of an experiment at the level of the software is described. Key parameters of indicators are determined, problems of automation of measuring processes are formulated, and the algorithm of determination of the threshold voltage and creation of voltage-brightness characteristic of the thin-film electroluminescent indicators in the automated mode is developed. The ideas explained in this article allow formulating the requirement specification on development of the device of the automated measurement of parameters of thin-film electroluminescent elements and also its constituents and the software.
Protection from electromagnetic pollution by using metal based shielding materials
Authors: Frah M A A , Pavlushkina T , Babinova A , Belyaev V , Makeev M , Osipkov A , Konopleva E , Zhachkin V , Usachev V 
Published: November 2021

Abstract
At first time a comprehensive investigation of properties of different types of filters protecting from electromagnetic (EM) radiation of to-date electronic devices for personal using – notebooks or laptops, mobile phones, WiFi devices, microwave ovens etc. has been performed for all components of EM pollution including electric and magnetic field strength and radiation power. The shielding filters were made by using different technologies including nanoparticles of transition metals implanted into glass, metal-plastic foils, glasses with different kinds of ITO coating. Values of the EM pollution reduction factors for different shielding filters types have been obtained that allow make recommendations for their practical application.
Using quantum computing to create efficient algorithms
Authors: Balaba I N , Deryabina G S , Pinchuk I A , Sergeev I V , Zabelina S B 
Published: November 2021

Abstract
The article presents a historical overview of the development of the mathematical idea of a quantum computing model - a new computational strategy based on the postulates of quantum mechanics and having advantages over the traditional computational model based on the Turing machine; clarified the features of the operation of multi-qubit quantum systems, which ensure the creation of efficient algorithms; the principles of quantum computing are outlined and a number of efficient quantum algorithms are described that allow solving the problem of exponential growth of the complexity of certain problems.
The resolution of a mathematically bad-defined problem in the approximation of a cellular automation by the example of the description of human states
Authors: Kalashnikov E V , Sheryomukhina A A , Filatov V D 
Published: November 2021

Abstract
A mathematical model describing the mutual influence of bad-defined various human characteristics is constructed. This model is described by a system of differential equations that reflect the “rate” of change in a characteristic as a function of the frequency of interaction with other characteristics. The transition from differential equations to equations in finite differences and the introduction of the von Neumann neighborhood on the resulting square space of the frequency of interaction of various human characteristics allows us to introduce a cellular automaton. The sequential execution of iterations in the cellular automaton allows to track how each of the entered characteristics depends on the behavior of other characteristics.
The organization of students’ project practice based on cloud technologies
Authors: Shevchuk M V , Gran T N , Kostyakova V G 
Published: November 2021

Abstract
The organization of project activities of students is discussed. Main stages of the project creation are highlighted and the activities of students at stage are presented. Main advantages of using cloud-based software in the educational environment over traditional educational software are considered. The selection of cloud services for their use at various stages of the project activity in accordance with the requirements of the educational process is presented. The proposed algorithm for organizing the project activities of students is illustrated by the description of the work on the project on the topic ”Parabola in Physics and Practical Human Activity. The presented materials were tested by the authors at the Faculty of Physics and Mathematics of Moscow Region State University during training sessions.