The article describes optimal mechanisms of wideband transmitter and receiver (150-600 kHz) for information transfer and for researching of thin structure of ionosphere in different helio-geophysical conditions. The proposed schemes give an opportunity to receiving with division of beams and to use the energy of all waves for increasing interference immunity.
Keywords: wideband, frequency of sounding, synchronization, antenna, reference generator, processor, band-pass filter, interference immunity, multipath propagation, phase, program
Modern development of x-ray technology allows to conduct a detailed study of multiphoton processes of absorption and scattering of x-ray photon by deep and subvalent shells of molecular systems in a wide range of energies. The specifics of solving the problem of interaction of an x-ray photon with a multiatomic system requires the use of a single-center approach to the calculation of the electronic States of molecules. The main disadvantage of this approach is a decrease in the accuracy of the calculation of spectroscopic quantities with limited consideration of the terms of the single-center decomposition of the molecular orbital. The paper studies the effect of accounting for higher harmonics of single-center molecular orbital decomposition on the calculation of the energy characteristics of molecular systems. The analysis of the parameters of the single-center decomposition of the functions of the nuclear ligand, depending on its charge. The criteria for inclusion of higher harmonics of single-center decomposition of atomic ligand functions in the molecular orbital are determined. The calculation of energy characteristics is performed on the example of diatomic molecules HF, LiF and BF. The selected series of molecules makes it possible to study the behavior of higher harmonics of the single-center decomposition of the molecular orbital depending on the growth of the atomic ligand charge.
Keywords: molecular orbital, single-center decomposition, higher harmonics, a nuclear ligand, the energy of the electronic state of a diatomic molecule
Diffraction characteristics of the gratings are calculated by two methods - method of approximate boundary conditions and a strict method based on the numerical and analytical solution of the two-dimensional integro-differential equation. Results of the graphene diffraction gratings calculations are presented.
Keywords: graphene, graphene gratings, volume integral equations, plasmons, coefficient of reflection
Hot stamping of porous preforms is considered. Structural steels obtained with the technology of hot stamping of porous blanks are much inferior in terms of machinability by cutting similar cast and hot-rolled steels to the chemical composition. The reasons for the poor machinability of cutting structural steel powders are given.
Keywords: powder metallurgy, hot forging of porous preforms, machinability by cutting
High-density powder steel obtained with the technology of hot stamping of porous blanks is much inferior in terms of machinability by cutting similar cast and hot-rolled steels to the chemical composition. The paper considers the ways of possible improvement of machinability of structural powder steels.
Keywords: Powder metallurgy, hot forging of porous preforms, machinability by cutting
The work is devoted to research of influence of laser visual stimuli on the functional activity of man. The analysis of changes in the tempo of psychomotor activities in promoting human dynamic images of laser graphics. Stress is a state of severe and prolonged psychological stress, which occurs in a person when his nervous system gets emotional overload. Stress is an integral and constant companion of our life because the phenomenon of stress is inherent in every organism. The main objective is the minimization reasons, namely the negative impact of stress on the psychophysiology of the person, and therefore his health and functional activity, and the consequence - the effectiveness of his work, and therefore factors as personal performance of the employee and of the organization as a whole. Alternative to conventional drug and non-drug methods of preventing and dealing with stress, is audio-visual stimulation, which is based on the fact that music and color can have a strong influence on the brain.
Keywords: psychophysiology of visual perception, light therapy, sound therapy, non-drug therapies, stress, health, medicine, optics, lasers, colors, lighting design, sound design
The article presents the results of the analysis of satellite information on the water surface temperature of the White Sea. Satellite data with a spatial resolution of 0.011°, obtained by the sensors of the satellites Auqa, Terra, NOAA-18, Coriolis and a time step of 1 day are used. With the help of an automated algorithm, a daily series of mean values of water surface temperature values of the White Sea averaged over the water area was formed.
Keywords: Water surface temperature, White Sea, satellites, automated analysis, daily series, spatial resolution
On the basis of these trade geophysical surveys and the laboratory analysis of a core features of a geological structure of breeds, their petrophysical and collection properties the applications of a technique of interpretation of the properties of breeds given for definition indicating the need are given in article, allocations and estimates of productive collectors it is necessary also justifications like a collector in Aptian-Albian terrigenous deposits of Tersko-Sunzhensky oil-and-gas area.
Keywords: oil, core, logging, interpretation, collector
This article considered individual and unidirectional cooperative mass transfer of two components with a various in the surface-active properties in extraction system carbon tetrachloride - 4% aqueous solution of potassium iodide in the flat interface in the conditions of spontaneous interphase convection. Studied the interaction flow of components in unidirectional cooperative mass transfer on the intensity of mass transfer each other in the conditions of spontaneous interphase convection. Unidirectional cooperative mass transfer acetic acid and iodine increase mass transfer iodine coefficient as compared to its individual mass transfer.
Keywords: spontaneous interfacial convection, Marangoni effect, the cooperative mass transfer, extraction, the mass transfer coefficient, acetic acid, iodine, carbon tetrachloride, the intensity of mass transfer
In the present work a new trends in the development of absorbent materials are described. The results of calculation of scattering and reflection patterns for multilayer structures are presented. Parameters of the structures with highest absorption are evaluated. Analysis of obtained theoretical calculations is presented.
Keywords: resonance absorption, metamaterials, plasmons, nanophotonics, nanostructures, reflectance
The problem diffraction H-polarized electromagnetic pulse is reduced to the solution of the integral equation. Singled and analytically transformed into a special part of the integral equation. It transformed the integral equation applied collocation method for solving the spatial coordinate. Found near field and the results of calculations of diffraction of electromagnetic pulse.
Keywords: Fresnel diffraction, electromagnetic pulse, collocation method, a near field
The present state and development trends of plasmonic materials. The results of the calculation of scattering and reflection diagrams nanostrzhnyah of ZnO. And the prospects for the use of anti-reflective optical lattices.
Keywords: non-reflecting grating plasmonic materials, nanophotonics, nanostructures, reflectance