The polarimetric inverse spectral problem for class of media with singular eigenpolarizations (linear and circular) in terms of Generalized equivalence theorem approach was solved. The cases of phase and amplitude eigenvalues were considered. Two different bases of Generalized equivalence theorem were observed. The types of anisotropy and the values of anisotropy parameters that provide the...
We develop the polarimetric model and ground-based calibration approach for the multi-spectral imager-polarimeter (MSIP), which is one of the two main instruments for the Aerosol-UA space mission [1]. MSIP is a polarimeter that serves to retrieve the optical and physical characteristics of the aerosol, as well as the cloud parameters with wide field of view. MSIP will perform measurements of...
Within the framework of the superspace symmetry concept, the phonon spectra have been calculated for the crystal structure of the Cu6PS5Br superionic material.
Infrasound effects from the Chelyabinsk meteoroid observed at the Ukrainian (2500km) and Russian(1417 km) research stations are described.The signal time delay and celerity have been determined by applying the basic for analyzing acoustic effects techniques, the system spectral analysis and the band-pass filtering. The basic periods and durations of the acoustic signals have been determined....
The functional scheme and results of evaluation of potential metrological parameters of acoustoelectronic transducer (AET) displacements with contactless receiver of surface acoustic waves (SAW) are presented.
The Density Functional Theory (DFT)-based computations of the electronic structure of undoped, B- and N-doped CNT(3,3), CNT(5,5), six-walled CNT with (37,37) chirality of outer layer and graphene with adsorbed chromate anions were performed within molecular cluster approach. The CNT(5,5) with several surface groups including –COOH, –COO-, –OH and –NH3+ were also considered as adsorbents in...
The electron trajectories in the pulsed magnetic field between flat electrodes of vacuum circuit (current) breaker are numerically calculated taking into account the secondary magnetic field generated by eddy currents that are magnetically induced in the electrodes. It is revealed that the dimensions of the calculated region affect the calculation results of the edge electron trajectories...
X-ray images denoising is an emerging problem in modern radiography systems. Purpose of present research was to investigate the efficiency of the application of wavelet transform for denoising x-ray images in digital radiography. The dependence of the SNR on major transform and filtration parameters was measured, namely wavelet type, thresholding method and threshold level selection way....
Femtosecond time – domain spectroscopy method is proposed. Spectral peculiarities of the Elementary Wave Pakckets series which was used for femtosecond pulse decomposition are well adopted for ultrawideband spectral analysiz. Example of single spectral line spectroscopy is shown.
The publication was aimed at demonstrating and qualitative assessment of the transport platform, the work is based on electromagnetic suspension technology with a significant variation in its payload, bulk and wheel formula.
The capacitance-voltage characteristics and measuring of capacitance kinetics were applied for investigation of absorptive response physics of the ITO – nanostructured TiO2 heterojunction. The studies were realized for air and ethanol vapour under various frequencies of probing signal. It was shown that processes of traps recharging are making the most significant contribution to the total...
Spatial, electrical and optical characteristics of a high-voltage nanosecond discharge between electrodes from copper in atmospheric pressure air in a highly overvoltage interelectrode discharge gap of 1 mm are presented. It is shown that this discharge is a selective source of copper ion UV radiation in the spectral range of 200-230 nm, which is perspective for use in point UV lamps
The work was aimed at demonstrating and quantifying how a permanent-magnet pulsed charger can provide a controlled charging process and user convenience. Our project is based on the "principle of magnetic suspension", which provides the device a mode of continuous operation.
The construction and mathematical model of the comb filter on the basis of the ring resonator of the surface acoustic waves and two SAW-waveguides associated with the ring resonator at opposite points is proposed.
The hyperbolic tangent scheme based on analog components was investigated and improved by using the “NI Multisim” simulation environment. The application of the analogue circuit diagram of a hyperbolic tangent with a differential stage and the variation in the choice of transistors allows for a relative error of 10%.
Proposed methods of modeling of electrical and temperature characteristics of single-electron transistor for providing information to system of computer-aided design Electronics Workbench. Analyzed dependence in current-voltage characteristics of nano-device trough values of temperature and operating mode.
The possibility of introducing non-emitting nanoscales on the basis of quantum cellular automata has been investigated. It practically neutralizes electromagnetic attacks. The method of protection from external interferences and observations of electromagnetic radiation (attacks) is proposed in the work. The power consumption of cryptographic modules has been reduced by five orders. Secure...
In this paper we consider a model of a dipole with an atomic structure, instead of the standard dipole model with point unlike charges and the Hertzian dipole model, which have significant drawbacks. A functional formula is proposed for the dipole force that arises between different charges in the process of dipole oscillations and the decompensation of their fields.
This paper reports the results of studying the duty cycle effect on unipolar pulsed discharge ignition in low pressure nitrogen. In order to break down the gas with short voltage pulses (small duty cycle values) one ought to apply higher voltage values than those for long pulses with large duty cycle values. On increasing the duty cycle the breakdown voltage approaches the value corresponding...
The electronic band structure for set of fluorine-doped oxide as well for oxyfluoride crystals were calculated by the Full-Potential Linear Augmented Plane Wave method. Calculations showed that fluorine impurities do not generate any states near band edges, consequently fluorine does not participate in optical transitions directly. Influence of fluorine on crystal structure is resulted in...
The paper presents the results of a study of the effect of quenching and subsequent tempering on the magnetization of steels.
This stadu is devouted to firsta principles study of Ag2SiS3 semiconductor crystal. The Electronic structure, and optical properties will be presented.
The set of lithium molybdates Li2MoO4 crystals were made by the Czochralski (CZ) technique at different growing conditions. The electronic band structures of ZnMoO4 and Li2MoO4 crystals were calculated by the Full-Potential Linear Augmented Plane Wave (FLAPW) method. Transmittance spectra of Li2MoO4 crystals reveal additional absorption bands near 370 nm. Calculations revealed different...
The level of electromagnetic radiation of a cell phone was estimated. It was shown that a person, talking on a cell phone daily for 2 hours, receives a radiation dose 100 times higher than the maximum permissible limit.
The processes of excitation of guanine molecules in the gas phase under the influence of slow electrons are investigated. The spectra of emission of molecules in the wavelength range of 200 - 800 nm for different energies of the exciting incident are obtained. The identification of spectral bands and the definition of their excitation thresholds are performed.
The results of experimental research and simulations of the characteristics of a two-wave UV-VUV lamp on a mixture of argon and freon vapor (CCl4) with pumping by a nanosecond barrier discharge are presented.
In work the structure, phase composition and magnetoresistive properties of three-layer films based on Fe and Ge were investigated. Established in them with a total concentration of Ge atoms from 5 to 20 at.% at the temperature range 300 - 870 K is the formation of a dilute solid solution of Ge atoms in the layers of Fe, which does not substantially affect the value of the magnetoresistance...
In work the structure, phase composition and magnetoresistive properties of three-layer films based on Fe and Ge were investigated. Established in them with a total concentration of Ge atoms from 5 to 20 at.% at the temperature range 300 - 870 K is the formation of a dilute solid solution of Ge atoms in the layers of Fe, which does not substantially affect the value of the magnetoresistance...
The La1-xCaxVO4 and La1-x-yEuyCaxVO4(0 ≤ x, y ≤ 0.2)micro/nanosized powders were prepared by aqueous nitrate-citrate sol-gel synthesis. Phase composition of the sample depends on the x, y values. Phase transformation and especially Ca2+ ions influence IR spectroscopy and luminescence behavior of studied compounds, as Ca2+ ions impact both on VO43- molecular groups and La3+ and Eu3+ ions.
We develop the cubic non-linear theory describing the dynamics of multiharmonic space charge wave (SCW), which harmonics frequencies are smaller than the two-stream instability critical frequency, with different relativistic electron beam (REB) parameters. The self-consistent differential equation system for multiharmonic SCW harmonic amplitudes was elaborated in a cubic non-linear...
The model of the hardware-software complex to implement psychodiagnostic, psychophysiological and social researches is considered. The main tasks of the complex are determined. The structural scheme of the hardware-software complex is described.
Bandages from the radiation cross-linked hydrogels show by itself elastic films with thickness h = 2÷4 . 10-3 m – transparent jelly sterile material, that with C = 85÷90% consists of distillate water. Such bandages for wounds for the grant of the urgent help at bleeding, burns must be biologically compatible and not stick to the wounds. They can contain antiseptic, anaesthetic, haemostatic....
Influence of CsCl additives on the transformation of nanovoids and optical properties of chalcogenide GeS2-Ga2S3 glasses are investigated. It is established that CsCl additives in GeS2-Ga2S3 glasses result in void agglomeration and shift of the absorption edge towards shorter wavelengths.
The technique non-destructive control of dairy products by methods spectroscopy in the processes its pasteurization offered. The object model was the development of software systems with the ability to control multi-threaded regulators with pasteurization and simulate its work to verify the correctness and operation of the technological process.
The relative grain-boundary energy of silicon films with equiaxed, dendritic and fibrous structure was determined by the method of grain boundary grooves with the use of atomic force microscopy. It was shown that undoped films with a dendritic structure possess the lowest relative grain-boundary energy; the largest relative energy was observed in fibrous structure. Annealing leads to the...
The optical properties of a broken surface layer of PZT piezoceramics modified by hydrogen atoms have been investigated. The phenomenon of an interference of light scattered on particles of the broken surface layer of PZT piezoceramics has been observed. Modification of the broken surface layer of PZT piezoceramics by hydrogen atoms leads to a partial spraying of the particles and an increase...
Polished tungsten sample with purity 99.99% wt. has been exposed to Ar ion beam generated by FALCON ion source. Typical parameters during steady-state expose were the following: Ar ion flux was 2-3×10^22 m-2s-1, heat flux was about 3 MW m-2, average ion energy of 2 keV and the ion fluence reaches 10^27 m-2. During the exposures, the temperature of sample reaches 1200 K. Following the exposure,...
We present a first step towards creation of a heterostructure with two superconducting leads and tungsten nanorods connecting them. We show that such a trilayer exhibits Josephson properties and thus realizes a superconducting junction with a spin-orbit active weak link. Specific features revealed in current-voltage curves of the junctions under microwave irradiation are caused by a resonant...
A kinetic Monte Carlo approach is applied to studying shape instability of nanowires and nanocones that results in their breaking up into chains of nanoparticles. Our approach can be used to explore dynamical features of the process that correspond to experimental findings, but that cannot be interpreted solely by continuum modeling reminiscent of the description of the Plateau-Rayleigh...
In the report the experimental data according alcohols (n-propanol, n-butanol, n-pentanol, n-heptanol, n-octanol and n-decanol) droplets evaporation into gas-vapor mixture of droplet substance’s vapor and buffer gas under optical irradiation influence were considered.
Within the framework of a mean field theory the origin of a spin- reorientation transition, compensation point, magnetic bias and thermally induced spin reversal have been investigated for rare-earth orthoferrites. It is considered the most general case of two sublattice antiferromagnetic with exchange anisotropy and rare-earth - iron interactions. A small applied field appears to be a...
Multiferroics invite intensive research from last decade because of their extensive range of interesting applications in high density data-storage systems, magnetoelectric sensors, multiple-state memories, nanoelectronics, spintronics. Bismuth ferrite (BiFeO3), which is widely studied due to large coupling between electric and magnetic orders at room temperature, is promising for above said...
*An idea of the Liquid Lithium Divertor has been proposed many years ago and has been realized at National Spherical Torus Experiment [1]. The liquid metal of divertor moves permanently to provide a material recycling and a shape of the divertor is curved to repeat the geometrical features of the confinement magnetic field. In such a way there are the necessary conditions for development of...
The magnetoresistivity properties of films based on Fe and Pd or Au were studied. It was shown what character of the dependence and the amplitude of magnetoresistance are determined by the phase formation processes: the structural ordering in the films based on Fe and Pd or granulation in the films based on Fe and Au. Since the phase composition of the granules has a wide temperature and...
The magnetoresistive properties of granular nanostructures based on permalloy (Ni80Fe20) and Ag prepared by the co-evaporation technique are presented. Effect of thermal annealing on magnetoresistance was described. It was shown that after annealing up to 600 K the transmission from isotropic character of magnetoresistance to anisotropic one is observed.
The heating of dust nanoparticles in a plasma jet and its effect on their velocity are studied using the computer simulation. It is shown that at plasma pressures at the inlet p=1-100 Torr dust particles are strongly heated in the plasma, and the temperature of the dust particles depends on their radius and plasma density. In the case of a rarefied plasma, small particles acquire a higher...
Dielectric-barrier discharges (DBD) are characterized by the presence of one or more insulating layers on the current path between metal electrodes in addition to the discharge space. Different planar or cylindrical configurations are common. Closely related are surface discharge configurations in which discharges are initiated at a dielectric surface due to strong electric fields generated by...
Spectroscopic analysis of the Raman gain profile in P2O5-doped single-mode fiber is resulted in our paper. Raman gain profile is obtained from the measured spontaneous spectrum of P2O5-doped silica fiber and it is presented in analytic form using 12 mode Gaussian components. Almost the exact fitting of the gain spectrum over the wide range of Stokes shifted frequencies from 0 to 1400 cm-1 may...
The paper presents the results of nano-particles production in two different atmospheric pressure plasma-liquid systems with the secondary discharge based on rotating discharges in vortex argon flow. The treated by plasma working fluids were aqueous solutions of AgNO3 with addition of different concentrations of surface active substances. The resulting samples after the plasma treatment were...
The paper deals with the calculation of radial density of electrons in carbon nanotube of arbitrary hilarity. On this basis it is calculated the diffusion coefficient by the transverse energies, then the radial distribution of the channeling particles in the channel of CNT was calculated numerically.
Van der Waals interactions between nanoparticles have recently become area of the great interest. They govern the way in which nanoparticles self-assembly into ordered structures [1-3] and play significant role in catalysis and nanomechanics. Interactions between infinite-length nanowires are well studied [4-5], but there is lack of works which examine finite-length nanowires. Our previous...
The results of diagnostics of spectral, temporal, and energy characteristics of radiation of a gas-discharge plasma on a mixture of mercury dibromide vapor and mercury diodide vapor with helium and nitrogen in the spectral range 350 ± 800 nm, as well as plasma parameters in the range of reduced electric field E / N = 1-100 Td are presented.
The method of electron-photon spectroscopy is applied to an important class of six-membered heterocyclic compounds – the nitrogenous bases which are a part of nucleic acids. Spectral characteristics of the molecules of cytosine and uracil adsorbed on the surface of graphite are analyzed. In UF and visible areas of the spectrum three wide unstructured strips are found. The most intensive...
Influence of design of multicomponent superchromatic quarter waveplates on the area of their achromatization and on the shape of the curve of the dependence of the phase shift vs the wavelength is investigated. Optimization of the design for five- and seven-component waveplates was carried out. It has been experimentally shown that insignificant changes in the angles of rotation of the...
The process of building and optimizing perfect-hash function so called “magic bitboards” were analyzed. The datastructure of board-games algorythms are mostly 64-bit integer and multiply-right-shift method of building perfect hash function is very natural for modern hardware. The main goal of optimization – decrease the size of lookup-tables to L1 cache of processor.
Titania was formed in the pores and on the surface of porous anodic alumina by sol-gel method. Its photocatalytic activity is seven times higher than those formed on non-porous surfaces (aluminum foil).
Soft X-ray (SXR) diagnostics is routinely used in URAGAN-3M and URAGAN-2M torsatrons. One of the SXR diagnostic applications is based on the plasma temperature estimation. The ratio of the SXR signals passed through two different foils is used for the temperature estimation. The spectral sensitivity of the photodiode itself can affect the temperature measurement in addition to the spectral...
The nanometric films based on iron and chromium oxides (Fe2O3-X(0≤x≤1) and Cr3-XO3-Y (0≤x≤2; 0≤y≤2)) with variable thickness, stoichiometry and photoelectrical properties were synthesized using ultraviolet photons of KrF-laser (248 nm) on the silicon substrate Si <100> at the substrate’s temperature ТS = 293°K. The samples of mono- and hybrid systems of the alternate layers...
Microcrystalline cellulose doped with luminescent oxides particles composites were made by cool pressing procedure. Morphology, crystallinity, luminescence and dielectric characteristics of the composites were studied. Their morphology can be described as “ceramics - like” type as it consists of cellulose plates and embedded oxide particles. Luminescence spectra of the composites covers all...
The work is related to stabilization of the plasma pinch and generation zones of directional EUV radiation by an external strong (up to 30 T) magnetic field in a high-current pulsed plasma diode with a limited working surface of a high-voltage electrode. The estimation of the external magnetic field magnitude which is necessary to stabilize the plasma pinch in the whole discharge stage has...
The article analyzes plasma research at the universities of Great Britain. It examines modern trends in the research carried out by the experts in this field at top universities of Great Britain. The article touches upon the problem of specific plasma research areas.
Investigation of characteristics of plasma streams, generated by different types of plasma accelerators and magneto-plasma compressors, is one of actual and important researches from point of view basic plasma dynamics and plasma applications in different technologists. It was demonstrated earlier, that near the MPC outlet there forms a stable compression zone, both theoretic and experimental...
Some important properties of PMC system-level diagnosis model are discussed. System-level diagnosis aims at the identification of faulty units in a self diagnosable distributed systems for elimination, repairing or recovering of these units. Fault identification in this system in great extent depends on the number of fault patterns under given system syndrome. Complexity of such analysis...
Quantum–chemical calculations of the properties of a As atom implanted SiO2/Si(100) interface are presented. For simulation of physicochemical properties and estimation of surfaces energy parameters semiempirical method of quantum-chemical modeling PM7 realized on МОРАС software package has been used. Dependencies of the total energy of a As atom cluster system on the location of As atom in...
A methods of the restoring the optical wave front by the gradient sensor without a reference wave are discussed. The main idea is the comparison the grating images in the two successive Talbot planes. Results, obtained for the optical band are proposed to expand in the range of shorter wavelength.
*Plasma-catalytic reforming of ethanol was investigated in a quartz reaction chamber. The composition of the reforming products was measured using mass spectrometry and gas chromatography. Results show that plasma-catalytic reforming can take place at significantly lower temperatures than traditional reforming. Emission spectra of plasma were investigated during plasma-catalytic reforming of...
In this work first principles calculations of dielectric function of LiNaSO4 single crystals are performed in the framework of density functional theory. In order to describe the exchange-correlation interaction the general gradient approximation and local density approximation are used. From the spectrum of real and imaginary parts of dielectric function, refractive indices and absorption...
We consider a motion of homochiral domain walls in asymmetric CrOx/Co/Pt trilayers, induced by an external magnetic field applied perpendicularly to the sample plane. We demonstrate that the longitudinal contribution to viscosity of a domain wall may play a significant role and in some regimes dominates the dynamic of a domain wall.
The work presents the results of experimental investigation into the process of transition from multidomain state of uniaxial single-crystal BaFe12O19 to the saturation one under the normal biasing magnetic field. It was revealed that the saturation field tends to decrease almost linear for the thick samples of hexaferrites upon increasing of their thickness. The experimental fact is compared...
High-frequency applications of Josephson contacts require single-valued current-voltage characteristics which are usually achieved by using an external low-resistance normal-metal shunt in parallel with each junction. In this contribution, we propose a new approach for realizing internal shunting in Josephson heterostructures where a barrier itself contains the desired resistive component. We...
Results of technological microwave plasma generator simulation based on Comsol Multiphysics environment are presented. Argon is used as working gas, microwave power of 300…700W. The method of generation based on microwave discharge of 2.45 GHz is researched.
*We demonstrated the possibility of the optical field focusing simulation into and behind the scattering medium using the wavefront shaping technique. The calculation of scattered fields was made with MSTM software which provides the exact numerical solution of the Maxwell equations for the system of spherical dielectric particles. Developed wavefront shaping algorithm allows investigating...
The erbium oxide coatings were formed by the sol-gel method on the monocrystalline silicon wafers. The thickness of the obtained coatings was about 100-150 nm. Strong Er luminescence with a maximum at 1.53 μm is observed from the oxide films.
The nanometric film based on iron and chromium oxides combination ((Fe2O3-Y(0≤x≤1)/Cr3-XO3-Y (0≤x≤2; 0≤y≤2) /Fe2O3-Y/Cr3-XO3-Y)) with thickness near 10 nm was synthesized using ultraviolet photons of KrF-laser (248 nm) on the silicon substrate Si <100> at the substrate’s temperature ТS = 800°K. This hybrid system of the alternate layers has two differently colored areas. In this work the...
Problems of saturation the excitation and phase transformations in Relaxed Optic are discussed. Basic mechanisms and models, which are used for the modeling these processes are analyzed. Was shown that cascade model allows to explain basic experimental data.
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By the method of Doppler tomography experimentally measured contours of the spectral line of potassium (kalium) (λ = 766.5 nanometer), the potassium radiated at dispersion of ions on the surface of silicon, in which phosphorus isinsert. Sizes of speeds of the excited scattered particles which are flying away from a surface of a target are determined.
Here we theoretically investigate spin waves excitations in antiferromagnetic spin chain of ring shape. We show that such system’s ground magnetization distribution is oriented along normal to the ring plane direction. The spin wave spectrum of ring forms four different asymmetric branches.
*Glassy chalcogenides of arsenium are characterized by high transparency in a near and middle infrared and belong to a class of materials which are used as active or passive elements in optical engineering. Experimental studies of the influence of radiation load (gamma radiation, X-radiation or electron radiation) enable to determine the character and change of physical properties of these...
In this paper we provide novel molecular models of murine bi-functional enzyme 6-phosphofructo-2-kinase/fructose-2,6-bisphospatase 2 and its five isoforms. Molecular 3-dimensional models were designed in silico via method of homological biomolecular modeling.
In this work an experimental study of samples of polycrystalline ferrites-garnets is conducted in order to determine their basic magnetic parameters. The method allows determine the magnetization of saturation, the width of lines of ferromagnetic resonance, the magneto-mechanical ratio. The applicability of the method for disk samples of different diameters and thickness is shown. The results...
The conditions for the deposition of metal nanostructures as a result of sputtering the electrode material of a highly over-stressed high-current nanosecond discharge between copper electrodes in atmospheric pressure air are given. It is shown that this discharge is a selective source of UV radiation in the spectral range of 200-230 nm on the transitions of copper and zinc atoms and ions. On...
The Cu0.1Ni0.8Co0.2Mn1.9O4 ceramics modified by NiO phase were investigated. It is established that the amount of additional NiO phase in these ceramics extracted during sintering play a decisive role. This effect is well revealed only in ceramics having a character fine-grain microstructure, while the monolithization of ceramics caused by great amount of transferred thermal energy reveals an...
As2S3 glassy semiconductor, due to the interesting photostimulated structural changes being revealed in their optical properties, has found wide practical applications as an efficient material for optical data recording, holography, integrated optics. Ag2S-As2S3 chalcogenide glasses differ among the other by high conductivity, making them promising materials for solid state ionic. The present...
The influence of a permanent magnetic field on the relaxation of microhardness of the titanium alloy VT3-1 over time was found. The limited value of the magnetic field induction at which the maximum effect is observed was determined.
The annealing at the temperature of heat treatment of 403 K for the irradiated by the flow of electrons Ω=5•1015 el./cm2, with the energy of 10 MeV, single crystals n-Ge was discovered. In this annealing, the magnetic sensitivity of the material had been increasing. The temperature drift of the magnetic sensitivity was studied and the analytical expression was obtained for finding of the...
As it is known, the first telescope was invented in 1609 by the Italian astronomer Galileo Galilei. By design, it resembled a regular telescope, but it was he who gave the first point to the study of celestial bodies. Since then, astronomy has advanced far ahead, as well as methods of observing celestial bodies. In addition to the optical range, a radio range with wavelengths from 1mm to 30 m...
The report considers various approaches to using the Kramers-Kronig analysis in semiconductor optics. A new approach is proposed – the use of Kramers-Kronig relations to verify known data of well-known semiconductors. As the research has shown, many data require clarification. It was found that a greater deviation is observed for diatomic crystals than for monatomic crystals, like silicon and...
AgGaS2, CdGa2S4, CdGa2Se4 crystals belong to the large class of triple chalcogenide compounds. These crystals are widely used in various nonlinear optical devices. Therefore calculation of optical properties of these compounds is important. In this work high frequency refractive indices are calculated by using Harrison’s bond-orbital method.
We demonstrate theoretically that a bi-layer structure consisting of a metallic layer with a strong spin-orbit (SO) interaction (such as Pt) and a layer of a bi-axial antiferromagnet (AFM), such as NiO, with weak easy-plane anisotropy can be a base of a THz-frequency signal detector with output DС signal generated due the THz-frequency spin-diode effect. Previously it was shown that such...
We proposed a new method for studying the process of generation of inhomogeneities in an aqueous solution by dissolving of glucose. In crystalline form the molecules of glucose are in the form of a ring. In the process of dissolution the ring opens up and turns into a chain structure then it formes in the ring again. During the achieving of equilibrium, occurs change of the optical activity...
There was a task at the International Physicists` Tournament in 2017:”How many magnets can be accommodated within a given surface area before the structure collapses and the magnets stick together? How does the maximal area number density of magnets depend on the important parameters?”. This report describes the process of emergence of the instability in the configuration of the magnets, that...
Spin pumping, a method of generating a spin current from a magnetic material into an adjacent non-magnetic metal, can be considered as a spintronic analog of a battery in conventional electronics. In this work, we discuss how spin-polarized charge flow into normal and superconducting wires can be realized and controlled using a three-arm quantum beam splitter.
In today's world, there is an unlimited number of unmanned aerial vehicles (UAVs), they have proved themselves well in the field of entertainment and in military affairs. But so far they have a lot of problems. Not all UAVs can have the enough duration of the flight. The issue of UAVs with electric motors exploitation has been examined in the article.
Results from the system spectral analysis of variations in the geomagnetic field horizontal components, which are associated with the orbital maneuvering subsystem engine burns and the firing of the booster stages of the Soyuz and Proton rockets at the Plesetsk and the Baikonur cosmodromes, are presented for the 2014 – 2017 period.
Most cognitive services deal with voice understanding of emotions, speech and speaker recognition. Thus, the actual problem is creating a general approach for speech embedding, such as speaker recognition. The state-of-the-art speaker recognition methods have significant restrictions on their use because these methods are sensitive to durations of the speech signals. In this paper, we've...
The silicon structures with dielectric insulation are having voltage fluctuations under single powerful current pulses. It is shown that the heating of the structure reaches such values that there is a negative differential conductivity in the overheating mechanism, which leads to the occurrence of voltage fluctuations.
