bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fluctuation-dissipation theorems and transport coefficients of the gases, liquids and nanofluids
Authors: Ya Rudyak V 
Published: June 2020

Abstract
In present paper a problem of the determination and calculation of transport coefficients is discussed. Gases, liquids, dispersed fluid including nanofluids are considered. The special section deals with the transport processes in fluids under confined conditions. The fluctuation dissipation theorems for transport coefficients of the turbulent fluid are formulated. It was shown that in all cases the transport coefficients are determined by the fluctuation-dissipation theorems. In according with these theorems the transport coefficients are the integrals of the correlation functions of the microfluctuations of the corresponding dynamical variables. The structure of the viscosity coefficient of all media mentioned above is analysed in detail. In the last part of the paper these viscosity coefficients are calculated by the molecular dynamics method.
On the possibility of determining antineutrino mass by measuring relative characteristics in β-decay processes
Authors: Samsonenko N V , Ndahayo F , Alibin M A 
Published: June 2020

Abstract
An influence of the neutrino (antineutrino) mass on the characteristics of nuclei and neutron β-deca y is demonstr ated. It has been shown that meas uring relative character istics allows one to get rid of the unknown nuclear structure, which makes it possible to determine the magnitude of the neutrino (antineutrino) mass in the β-decay processes with greater accuracy. An analysis was carried out based on general theoretical formulas for differential probabilities of the β-decays of the free neutron and tritium nucleus. As a result, it was possible to obtain simple formulas from which a theoretical estimation for the neutrino (antineutrino) rest mass can be obtained.
Eigen values and proper solutions of the second Stokes problem for Fermi gases with constant amplitude of surface oscillation
Authors: Bedrikova E A , Seregina S L 
Published: June 2020

Abstract
In the work a kinetic equation for the problem of gas oscillation is derived. Mirror-diffuse boundary conditions are formulated. Own solutions of the characteristic equations corresponding to the eigenfunctions of the problem are presented. The dispersion function by using the Sokhodsky formulas is analyzed.
Interaction of electromagnetic H-wave with thin conducting film taking into account anisotropy of isoenergetic surface of conductor
Authors: Kuznetsova I A , Romanov D N , Yushkanov A A 
Published: June 2020

Abstract
The coefficients of reflection, absorption and transmission of electromagnetic H-wave with thin conducting film located between two dielectric environments are calculated in the framework of the kinetic theory in this article. The case of an anisotropic isoenergetic surface of a conductor is considered. The electromagnetic wave is incident onto the upper surface of the film at an arbitrary angle. The case of different specularity coefficients when reflecting electrons (holes) from the lower and upper surfaces of the film is considered. The isoenergetic surface of the conductor is a three-axis ellipsoid, one main axis of which is parallel to the normal to the boundary of the film, and the other to the electric field of the incident electromagnetic wave. The analysis of the dependences of the reflection, absorption and transmission coefficients on the effective mass for degenerate and non-degenerate gas of free charge carriers is carried out.
Multi-electrode quantum-dot semiconductor optical amplifier as an intensity modulator of signals in optical communication systems
Authors: Yazbeck H A , Belyaev V V , Tkachenko I M , Hamze M M 
Published: June 2020

Abstract
In this paper, we are going to exhibit the system performance using the single, double and three-electrode quantum-dot semiconductor optical amplifier as an intensity modulator (3E-QD-SOA-IM) of the adaptively modulated optical orthogonal frequency division multiplexing (AMOOFDM) signals in the intensity-modulation direct-detection passive optical network (IMDD-PON) systems. Moreover, to compare the bit-rate versus transmission distance of the proposed fiber link model when using both configurations multi-electrode semiconductor optical amplifier intensity-modulator (ME-SOA-IM) and multi-electrode quantum-dot semiconductor optical amplifier intensity-modulator (ME-QD-SOA-IM), to study the improvement of the transmission capacity, distance reach and power efficiency when applying the proposed configurations for optical access networks for distances ranging from 20 km up to 120 km. The three-electrode configuration solved the nonlinearity of the two-electrode configuration and offered a considerably wider range of optimum operating conditions to achieve up to 35 Gbps. Furthermore, the 3E-QD-SOA-IM showed a better performance over the 3E-SOA-IM over all the 120 km, and a 5 Gbps enhancement in the bitrate with a 20 dB less optical input power at 20 km.
Study of resonant-tunneling diodes I-V curves kinetics under destabilizing factors influence
Authors: Cherkasov K V , Meshkov S A , Makeev M O , Ivanov Yu A 
Published: June 2020

Abstract
Resonant-tunneling diodes (RTD) are prospective EHF and UHF electronics elements. Using RTDs as radio frequency converter’s nonlinear element would allow to improve converter’s performance indices and extend its frequency range up to THz. The purpose of research is investigating kinetics of the RTD’s I-V curve under given operating conditions, such as high temperature and ionizing radiation’s influence. For this case, special mathematical models are submitted. These models describe RTD I-V curves’s degradation under high temperature and ionizing radiation’s influence. Basing on described models a program package allowing to simulated RTD I-V curves’s kinetics under listed factors’ influence was developed. Results’ adequacy is verified by comparison with experimental data.
Methodology of accounting technological and operational factors in the process of complex optimal design of micro and nanodevices, manufactured using group technologies
Authors: Meshkov S A 
Published: June 2020

Abstract
The problem of ensuring micro and nanodevices’ main quality indices (performance, reliability and manufacturability) at design stage is considered. Group technologies used in micro and nanodevices’ production provide high correlation of device parameters formed simultaneously in single technological cycle. This imposes restrictions on the methods of ensuring the serial availability and reliability of micro and nanodevices. Existing design technique does not allow to reach optimal combination of performance, manufacturability and reliability indices for devices batch. The purpose of this paper is to develop a micro and nanodevices’ complex design methodology that would allow to reach optimal combination of main quality indices using existing group technologies: performance indices and serial availability in given manufacturing conditions and reliability in given operating conditions. To achieve this goal an additional stage of design and technological optimization is introduced into conventional process scheme. Input parameters for this stage are device’s design parameters from circuit design and design engineering stages, technological errors of these parameters from technological preparation stage and data on the device design parameters and performance indices’ kinetics under given operating conditions. As a result of the optimization, corrections to the nominal device design parameters that maximize the target function are determined. The objective function is either probability of finding device performance indices inside imposed limits range, or probability of performing specified functions during given operating time, or gamma-percent operating time to parametric failure. Submitted methodology was tested on micro and nanoelectronic devices, namely, microwave mixer and rectifier with resonant-tunneling diode as nonlinear element.
Superconducting properties of bi-layer graphene in chiral model
Authors: Rybakov Yu P , Umar M , Iskandar M 
Published: June 2020

Abstract
Within the scope of the graphene chiral model we suggest a description of superconducting properties of the bi-layer graphene with some twisting angle a between the layers. The interaction with an external magnetic field is included through the gauge invariance principle, the field being oriented along the graphene plane. The expression for the optimal twisting angle generating superconductivity is obtained, the latter being equivalent to the vanishing magnetic field between the graphene layers (the Meissner effect).
Octamers participation in the formation of lysozyme ordered layers from crystallization solutions
Authors: Folomeshkin M S , Marchenkova M A , Boikova A S , Ilina K S , Pisarevsky Yu V , Yu Seregin A , Kovalchuk M V 
Published: June 2020

Abstract
The results of the study of thin film ordered protein structures formed from polydisperse solutions of lysozyme using Langmuir technology are presented. The proposed method for producing protein films is based on a modification of the Langmuir-Schaeffer method, which consists in using a pre-prepared protein solution with the addition of a precipitant. The pre-prepared protein solutions’ parameters (protein and precipitant concentrations, buffer type, etc.) correspond to protein crystallization conditions. It is assumed that protein oligomers formed in the solution as a result of the addition of the precipitant (in particular, for lysozyme these oligomers include octamers) are directly involved in the formation of Langmuir protein layers on the surface of the liquid and on solid substrates. Using the method of grazing-incidence X-ray standing waves, the structure of multilayered protein systems formed from polydisperse solutions was studied, which made it possible to determine directly the position of precipitant ions (NaCl, CuCl2 and NiCl2) relative to the protein layer. The method of processing the X-ray reflectivity and grazing-incidence X-ray standing waves data, based on the use of information on the atomic structure of lysozyme octamers isolated from the crystal lattice, made it possible to determine the thickness and electron density of protein films and to reveal the orientation of protein molecules in the layer.
Influence of 2,3-naphthalocyanines structure on their supramolecular organization in floating layers
Authors: Kazak A V , Marchenkova M A , Dubinina T V , Chausov D N 
Published: June 2020

Abstract
Herein, we present a study of the floating layers morphology for 2-naphthyl- and 2-naphthoxy-substituted zinc 2,3-naphthalocyaninates. The packing of molecules in the monolayer structures at the air-water interface were simulated, and the unit-cell parameters of face-on and edge-on monolayers were calculated. Using these data, the supramolecular organization of the floating layers of the substituted 2,3-naphthalocyanine complexes was determined. It was shown that these compounds form stable layers with edge-on packing of molecules at the air-water interface. The results obtained give the possibility to use more efficiently thin-film structures based on the obtained Langmuir layers in optoelectronics.
Formation of spiral microstructures during crystallization of 4,4‘-azoxyanisole from a benzene solution
Authors: Vasilchikova E N , Konstantinov M S , Mashchenko V I , Chausova O V , Kuzmin M K , Dadivanyan A K 
Published: June 2020

Abstract
A phenomenon of formation of multiple “coffee rings” consisting of microcrystals in the 4,4‘-azoxyanisole - benzene system was experimentally and theoretically investigated. It is shown that by changing of the geometry of a drop, for example, by placing a metal ball in its center it is possible to fundamentally change the geometry of the “coffee ring”. Assumptions were made about the physical nature of the effect of the formation of a “coffee ring” of a spiral shape. The proposed geometric model of this phenomenon reflects well the physical processes occurring during spiral crystallization, and the model is in good agreement with the experimental data obtained by gravimetry. New approaches to the formation of microstructures of functional materials with a thermotropic liquid crystal phase on a glass substrate can be used to create devices for nano – and microelectronics and optical technology.
Liquid crystal aligning using different approaches
Authors: Kamanina N , Jovanovic Z , Belyaev V 
Published: June 2020

Abstract
In the current paper the classical and new relief at the interface: solid substrate-liquid crystal mesophase is presented in order to orient the liquid crystal molecules with good advantage. Rubbing technique, some geometric construction at the interface, UV and VIS treatment of the polymers, and laser oriented method are shown. The last one is connected with the materials surface relief modification using the laser-matter interaction process by the application of the IR CO2–laser at the wavelength of 10.6 micrometers. As the efficient nano-objects applied for the relief improvement the carbon nanotubes with the small refractive index close to 1.1 and the large Young’s modulus are used. As an additional, the varied electric field of 100-600 V/cm is applied in order to deposit the carbon nanotubes at the materials surfaces in the vertical position and to form the covalent bonding between the carbon atoms and the model matrix materials surface atoms. The novel results are shown in comparison with that obtained before for the classical orienting liquid crystal molecules methods. It extends dramatically the area of the liquid crystal cells use.
Modulation of structure and optical properties micro-fibrils of plants by means of electrical, deformation and optical treatments
Authors: Vinokurov S A , Tsebruk I S , Betenina T D , Klassen N V 
Published: June 2020

AbstractVariations of structure and optical properties of micro-fibrils of plants induced by optical, electrical, deformation and water treatments were studied in situ by means of optical polarization microscopy. Bundles of dry fibrils pulled out from nettle, maple and spruce were used for the experiments. Strong enhancement of the optical anisotropy in all of the fibrils has been found just after their wetting with water. Appearance of this anisotropy is attributed to orientation ordering of cellulose molecules in the neighbor layers of the walls of the fibrils. This ordering is explained by penetration of water molecules into the interfaces between cellulose layers and amorphous lignin polymers bound with cellulose molecules in the dry state of the fibrils. Relatively week electrical fields applied to the fibrils removes this anisotropy by pushing out the molecules of water from these interfaces. Evaporation of water returns the fibrils to optically isotropic state as well. The changes of the anisotropy of the fibrils are followed with their deformations These deformations induce internal electrical fields. Hence the interactions of the fibrils with water, electrical and deformation fields result in self-consistent propagation of electromechanical waves along the plants vessels. These waves are capable to transport feeding nutrients. Irradiation of wood components immersed in water by ultraviolet light induces dissolving of lignin and produces pure cellulose fibers. This phenomenon provides the development of new ecologically safety technology of production of cellulose.
Wireless system of autonomous temperature and humidity sensors in potato storages
Authors: Nunuparov M , Khotemlyansky P , Popovich A E , Panchishin V 
Published: June 2020

AbstractAutonomous wireless sensors for the temperature and humidity in the premises for storing vegetables allow you to create automatic systems to maintain the storage conditions of these products, which is necessary for their proper long-term preservation. This article proposes a system for wireless monitoring of temperature and humidity, which reduces the costs of laying and operating cable sensors in the infrastructure of fruit and vegetable stores, and monitors temperature and humidity at different levels of the embankment of fruits or containers. A feature of the proposed automation technology is the ability to measure temperature / humidity in hard-to-reach places, for example, in ducts or, which is especially important, in the depths of a mound of potatoes, where it is almost impossible to monitor the processes of formation of rotting foci.
Measurements of porous aluminum oxide thermal properties
Authors: Kurilov A D , Belyaev V V , Alyasova E E , Osin A V , Tokareva O A , Nessemon K D , Belyaev A A , Kh Abduev A 
Published: June 2020

Abstract
A method of measurement of the thermal performances of composite materials on the base of the porous aluminium oxide is described. The method takes into account the heat inhomogeneity, the material inhomogeneity and anisotropy as well as specimen’s surface radiation. Investigations of the thermophysics properties of the porous substrate fabricated with using of the electrochemical aluminium oxide technology vs. temperature and long staying in a climate chamber were fulfilled. The tests demonstrated that the climatic impact does not influence on the high thermophysics properties of the aluminium oxide material that have extremely high thermal conductivity ≤ 120 W/(m·K).
Real-time distributed computing system for modeling of physical processes
Authors: Bychkov V , Dembitsky N 
Published: June 2020

Abstract
Modern physical experiment imposes stringent requirements on the speed of computing devices built into an experimental setup. The purpose of them is to manage the simulated processes in a timely manner synchronized with the rate of parameters change. Coordinated by the interaction of physical and computational processes in the experiment most often determines the receipt of adequate results. At developing of control systems for experimental installations, not only calculations of functional characteristics and dependencies are required, but also a logical analysis of the input information. Survey of a large number of sensors, the need to control numerous devices and physical installations results in an avalanche of the software growth, slowing down information traffic, and increasing of the computing load on computers. All this complicates the task of coordinating of computational and physical processes in the experiment, and reduces the reliability of control systems. The proposed approach to increasing the efficiency of computing systems is based on the distribution of computers within the experimental setup. Methods of continuum computing devices embedding into the control of interacting processes and their transformation into one of the links in the system are considered. On the basis of continuum processors, a hardware implementation of a distributed knowledge processing system is created, which is built into the complex of control and management tools for complex experimental installations.
A quick method for size estimating of “green areas” in aerial photography
Authors: Astashev M , Baimler I , Zakharyan R , Sotskov V , Lomanov V , Romanova I 
Published: June 2020

Abstract
Developed software that measures the size of “green areas” in aerial photography. The software allows you to work with photos and videos that have any scale mark. In addition, the program allows you to evaluate the profile area of “green areas” in aerial photography. The article provides an example of using software. The features are shown, screenshots are provided for clarity.
Deposition of thin films of nanoscale carbon onto solid samples as a method of suppressing surface colonization of bacteria
Authors: Anpilov A M , Barkhudarov E M , Cristofi N , Ivashkin P I , Moryakov I V , Barlow P B , Kossyi I A , Misakyan M A , Yarkova T A , Athi Narayanan S M , Ponard M 
Published: June 2020

Abstract
The paper presents preliminary results demonstrating the bactericidal properties of surface coatings created on metal and dielectric samples by evaporation of a colloidal solution of nanostructured carbon. A colloidal solution of nanocarbon was obtained using a high-voltage pulsed multi-spark discharge in ethanol with argon injection into the interelectrode space. The main properties of a colloidal solution and the parameters of its constituent nanoparticles are given. Bactericidal activity was assessed by seeding Escherichia coli (gram-negative) and Staphylococcus aureus (gram-positive) bacterial cultures on prepared slides. Results on suppression of bacterial colonization on samples coated with carbon nanoparticles are presented.
The elements of mathematical modelling of the bearing ring grinding
Authors: Tumanova M B , Koltunov I I , Gorbunova T N 
Published: June 2020

Abstract
According to the calculation results, numerical values of the error of the shape along the profile of the inner surface of the ring are obtained. The largest error values were obtained with cartridge grinding of the inner surface of the ring. Smaller error values correspond to the grinding scheme on hard supports. In this paper, we propose a method for forming a volume finite element model of a bearing ring. Application of the model made it possible to assess the effect of the grinding pattern of the inner cylindrical surface on the error in the shape of the ring.
Description of Projective Transvection of Projective Special Linear Group PSL
2(K) Over a Field K
Authors: Sabbar Shakir , Widodo Agus , Hidayat Noor , Alghofari Abdul Rouf 
Published: June 2020

Abstract
The purpose of this paper is to introduce one of the most important element closely connected with the classical linear group namely projective special linear groups SL
2(K)/Z of degree 2 over a field K, where Z is the center of the special linear group SL
2(K) consists of all scalar matrices whose determinants 1. This element called projective transvection which is an element of the projective special linear group PSL
2(K) that is, a coset gZ where g is some element in SL
2(K). In the present study, we will extend our conception about the projective transvection, so we can say this element is generating set of PSL
2(K). For that reason, we need todescribe this element for obtaining more conception about PSL
2(K) especially to describe subgroups of PSL
2(K) that have been generated by projective transvection.