This article discusses the results of a correlation analysis between the indicators (parameters) of the established amount of tone in the spectral group of reflected visible light and corrosion resistance for single-phase nickel alloys of the Ni-Cr-Mo: Kh30N60M9, Hastelloy G-35 systems with a solid solution structure. The initial data for the analysis were the data obtained as a result of the analysis of the tone components of the reflected visible light by calculating the wavelength of the reflected light. The developed software estimated the amount of tone in the participating color groups, reflected visible light, where the tone is estimated by wavelength, determining the participating color groups. Further, the amount of tone determined in the color group is recalculated by the number of image elements - pixels, already offering the tone density in the color group. Corrosion rates were determined by a standard gravimetric method according to ASTM G-28 "A". Correspondence of the parameters: tone and corrosion rates for the alloys under consideration after various heat treatments indicated their high negative connection. The established fact allows us to state that a larger tone value determined for the pixel fragment characterizes a lower corrosion rate and better corrosion resistance in identical test conditions. The indicator correlation coefficient is determined at the level of - 0.93. 

The article discusses the design of a printed circuit board of a contact device designed to control the electrical parameters of serial produced transistors. This contact device is a double-sided printed circuit board. The developed electrical circuit diagram of this device is given, the components included in it are listed. The process of designing a printed circuit board, which includes several stages, is described. The topology of a double-sided printed circuit board made using the Altium Designer program is shown. The criteria for the design of this topology are highlighted. The used circuit board layers are described. Next, based on the created Gerber files, using the high-quality production technology of a printed circuit board layout was made. In the future, a printed circuit board made in this way can be used to test the electrical parameters of transistors.

The technology for producing a complex oxide is based on knowledge of its thermophysical characteristics, in particular, heat capacity. To calculate its temperature dependence, a previously proposed thermodynamic model of a two-phase local equilibrium region was used. The numerical values of the parameters and coefficients of the model are obtained from a comparison of the theoretical curve with the experimental data given in the literature. It is shown that the construction relations adequately describe experimental arrays of various complex oxides not only in the limited temperature ranges studied, but also make it possible to calculate the heat capacities of oxides in the range from 0 K to their melting point. The need for additional experimental study of the transformation in neodymium orthoniobate in the region of 1000 K is indicated.

The article discusses the issues of television spectral visualization in relation to the research of the paper basis of historical documents, including handwritten book monuments. Methods of formation and processing of spectral images are considered. Some technical characteristics of the equipment and methods of experimental research are given. The results of experiments using spectral television systems and image processing programs to determine differences in the paper base used in writing texts in handwritten book monuments are discussed. Comparative spectral characteristics and histograms obtained for the studied paper samples are presented. Practical recommendations are formulated for the use of television spectral systems in case of need for rapid analysis of large arrays of historical documents, as well as in case of need for in-depth studies of individual samples of documents of special interest.

The article considers the design of a trunking communication system using the proposed method of automatic placement of base stations and the developed software. The aim of the work is to reduce the complexity of designing trunking communication systems. In the automatic placement method, special attention is paid to calculating the required number of channels for organizing communication between a given number of subscribers. The scientific novelty of the presented solution lies in the fact that in the method of automatic placement of base stations, the coordinates of their installation locations are determined using the proposed greedy algorithm, in which the calculation of the service areas of base stations is carried out on the basis of a modified Hut model. Then, for the obtained coordinates of the base station installation sites, an updated calculation of the service areas is carried out, taking into account additional diffraction losses, tropospheric scattering and losses in the atmospheric waveguide. After that, the guaranteed service area is determined. The results of the design of the trunking communication system in the developed software are presented, graphs of the dependence of the calculation time of the greedy algorithm on the area of the territory that needs to be covered by the connection are given.

A tested version of a test bench for studying the temperature dependence of the integrated current sensitivity of photodetectors is described. An original optical thermostat with a vertical beam path was used. This has made it possible to avoid the use of additional optical windows in the thermostat. Temperature control was carried out by a forward-biased emitter junction of a germanium transistor. The bias current was 100 μA. An experimental calibration of the temperature sensor was carried out in the range from 77 to 373 K. A blackbody model with a temperature of 800 K was used as a radiation source. Electrical circuits of the sensor and signal recorder for photodiodes are presented.

As part of the study, a review of existing technologies for modifying silicon carbide for subsequent use when creating devices in radio engineering and telecommunications equipment was carried out. The main advantages of silicon carbide due to its properties, new methods of its processing taking the influence of the atmosphere phase composition into account are given, a physical and mathematical model of laser dimensional modification of silicon carbide crystals is given, a new technique for carrying out the regeneration process of erosion traces of radiation nature in silicon carbide crystals in a liquid medium is given, and also practical recommendations have been developed for the implementation of the method of laser dimensional modification of carbide crystals, distinguished by structural and technical solutions within the framework of automated technology for creating a mesa-planar design with elements of limiting the conductive connections of microsystems, based on the radiation erosion implementation in a gas and liquid environment, as well as a controlled regeneration process of erosion traces.

The issues of using multispectral imaging in remote sensing of the Earth, both using satellite images and using unmanned aerial vehicles (UAVs), are discussed. The use of multispectral images for assessing reforestation, the effectiveness of herbicide use, reconstruction of archaeological sites, environmental monitoring of the surface of reservoirs by monitoring the extent of the spread of blue-green algae, and recognition of the road network in forestry is described. The feasibility of using UAVs to survey individual areas of the terrain instead of obtaining images from satellites is assessed. The results of increasing the information content of multispectral images obtained using various processing options are presented. Based on the results of the analytical review, trends in the development of methods for improving the visual quality of multispectral images obtained during monitoring of the earth's surface are formulated. The disadvantages of the considered methods for increasing the information content of multispectral images are indicated, and improvements are proposed that can improve the methods used.

Modern heat pipes (HP), being special cooling devices, effectively ensure the continuous removal of thermal energy. Currently, the HP class is widely used in RES, the housings of which are made in the form of profiles of a special design made of aluminum alloys. The article discusses a new technique for diagnosing the quality of HP with a symmetrical structure by the asymmetry coefficient. It has been experimentally shown that the methods of the asymmetry coefficient and the isotherm shape coefficient, adapted to the diagnosis of the quality of heat pipes with a symmetrical structure, make it possible to identify the asymmetry of heat transfer in the presence of latent defects in the HP structure.

The curve showing dependence of amount of silver in copper grains on the annealing temperature, compiled during the annealing process at different temperature has been theoretically analyzed. An attempt to develop a model based on the approach of nonequilibrium evolutionary thermodynamics to describe the annealing process was made. This model has been tested using computer simulation. Taking the previously developed model for megaplastic deformation within the framework of nonequilibrium evolutionary thermodynamics into account, the experiment was fully simulated, which consisted of annealing and further processing by plastic torsion deformation.

It is shown that the process of vacancy generation is always nonequilibrium in nature and can proceed through two channels, the first of which is associated with a thermal fluctuation mechanism, the second with plastic movement and generation by a defect of a higher scale level.

In this work, based on the dispersion characteristics of spin waves and the theory of the magnetoelectric effect, a mathematical model of a multiferroic structure behavior in a non-uniform electric field is constructed. The nature of the exchange interaction is taken into account, and the Rado-Wirtman exchange boundary conditions are also considered based on their representation in terms of free energy density. Based on the constructed mathematical model, the contribution to the dispersion pattern of spin waves of an external electric field of different polarities is estimated. In conclusion, a number of cases of application of the constructed mathematical model in the design of electronically controlled devices for the directional propagation of spin waves, as well as basic devices for neuromorphic computing, are given.