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Plywood is a wood-based board material made of thin sheets of veneer. Plywood is the most demanded material in construction and industry not only in Russia, but also abroad. The sphere of its application is diverse: furniture, interior and decorative items, construction, packaging, beekeeping, aircraft and machine building, shipbuilding, arms industry, rocket building, manufacture of musical instruments, advertising industry. All researches conducted to date, both world and Russian scientists are aimed at finding ways to improve the strength characteristics of plywood, to develop a popular range to meet the needs of modern society. The purpose of the present work is to substantiate the choice of gluing mode of hardwood plywood, to study the specifics of the processes occurring during the pressing of plywood, to substantiate them from the theoretical and practical point of view. The application of the method of forming the package with the displacement of the middle layer by 450 will allow to achieve an increase in the shear strength of the glue layer by 46% for birch plywood, by 17% for aspen plywood and by 44% for beech plywood. In case of production applications, it is recommended to form such sheets from lump veneer. The recommended modes of pressing of hardwood plywood will provide the value of the shear strength on the glue layer, corresponding to GOST 3916.1- 2018 [22]. At the same time, the use of increased pressure is justified only in the production of plywood from aspen veneer; for other species, changing the value of pressing and pressing pressure is not reasonable.

This article into the intricate biology and ecology of the Ural saiga (Saiga tatarica) population, offering a comprehensive update on its current status and dynamics. Drawing upon extensive field studies conducted at various key locations including lambing sites, and summer and winter habitats, the research aims to provide a nuanced understanding of the evolving relationship between saiga and agriculture. One of the primary focuses lives in assessing the landscape-modifying impact of saiga within contemporary environments. By examining the role of saiga in shaping local ecosystems, the study sheds light on the intricate interplay between these magnificent animals and the agricultural activities that often encroach upon their habitats. A significant aspect addressed in this research is the conflict of interests arising between the burgeoning Ural saiga population and agricultural practices. This conflict tends to intensify during periods of population peaks, posing challenges for both conservation efforts and the agricultural development. To mitigate these conflicts and pave the way for sustainable coexistence, the study puts forward preliminary measures for resolution. These measures are designed to reconcile the divergent interests of saiga conservation and agricultural productivity. Furthermore, the research identifies potential pathways for integrating the growing saiga population harmoniously into modern agricultural landscapes. By exploring innovative approaches and collaborative strategies, the study seeks to foster a mutually beneficial relationship between saiga conservation and agricultural sustainability. Overall, this article serves as a vital resource for policymakers, conservationists, and stakeholders invested in the preservation of the Ural saiga population and the cultivation of sustainable agricultural practices in the region.

Traditionally, fibers for fiber-reinforced concrete are made of metal, polypropylene, basalt or glass. На сегодняшний день для строительства актуально использование волокон с уникальными электрофизическими свойствами. The possibilities of using a microwire made of an amorphous ferromagnetic alloy based on cobalt with a shell of borosilicate glass in concrete technologies are studied in this paper. The influence of the content of fibers of different sizes (length 7 and 15 mm) on the rheological and physico-mechanical properties of the solution was established. The deterioration of the workability of mixtures and the average density of the composite with the introduction of the studied fiber is shown. It has been established that the spread diameter of the mortar mixture with a fiber content of 0.5...3.0 % by weight of Portland cement is reduced by 9.8...26.1% compared to the control composition. It is shown that the short fiber (7 mm) at the maximum content (3 %) leads to a more significant decrease in the average density (up to 9.6 %) compared to the long fiber (15 mm) of the same concentration (reduction is no more than 4 %). A positive effect on the flexural strength and crack resistance of the solution was established. The increment of flexural and compressive strength ranges from 1.11 to 1.54 and from 0.99 to 0.78 respectively with increasing fiber concentration. The presence of fiber in the composition of the solution allows you to increase the crack resistance from 0.098 to 0.164. The increase in the crack resistance coefficient for compositions with a fiber 7 mm long is 51...68 % and compositions with a fiber 15 mm long is 22...37 %. The possibility of using such microwire based on a ferromagnetic alloy for dispersed reinforcement of cement solutions opens up prospects for the creation of “smart” materials.

In this paper, we consider the possibility of obtaining nickel nanoparticles from a bulk sample by the method of induction flow levitation. This method is based on non-contact heating and holding a metal sample in a state of levitation by a high-frequency electromagnetic field. The generator power was 10 kW and the frequency was 440 kHz. The synthesis took place at a temperature of 1800°C with a feeding rate of 3 g/h. Argon was used as the refrigerant gas, the pressure in the system was maintained at 400 mbar. The resulting nanoparticles were characterized by size using SEM and TEM micrographs, where the average size of the nanoparticles was ~16 nm. XRF and SEM-EDS, the results showed the presence of only metallic nickel and oxygen in the nanoparticles.

This article discusses the prospects for the use of hydrogen technologies in conjunction with renewable energy sources. A sim plified model of the power system of an isolated consumer using hydrogen technologies has been compiled. An experimental calculation of the electrical part of the system has been carried out. Based on the results obtained, conclusions are drawn about the further improvement of this model.

This article is devoted to the analysis of the factors aimed at ensuring the sustainability of development, as well as certain markers of the presence of the stable development of the Russian Federation regions. As part of the work, it is planned to analyze the relationship of digital development in the country and its effective effects for the process of interregional differentiation in modern conditions of a prolonged economic crisis, aggravated by an unfavorable epidemiological situation. In this case, particular importance should be given to the analysis of the ecological component as a factor that predetermines the possibility of the development and implementation of certain technologies. Due to the dynamic assessment of the decoupling effect, the differentiation of regions is assumed, the analysis of the tendency towards a decrease in the inconsistency of the development models of territories. Herewith, special attention is focused on the factor of a potential further decrease in differentiation based on an increase in the sustainability of economic and environmental development processes.

The object of the study is the angle of deviation of the crane from the perpendicular to the rails in a horizontal plane. The aim of the work is the mathematical description of the crane’s bridge beam misalignment, creation of the model in Matlab Simulink. Based on the resulting model, there was implemented a control system that compensates for emerging misalignment by speeding up or slowing down crane drives.

The article is devoted to the consideration of “digitalization” concept as a tool for solving control problems. The problems of digital twins formation are discussed and two directions for digital models creation are presented. The necessity of using a natural-model approach, methods of natural-mathematical modeling, similarity theory for building digital models is noted.

The article is devoted to the specific character of using digital twin technology in the coal industry. The key points and nuances of this technology application in the industry in general and in the coal industry in particular are discussed.

This article is devoted to the analysis of the impact of digital transformation processes on the socio-economic development of the country. To study the driving forces of development of the economy of the Russian Federation, a three-factor Cobb-Douglas function was constructed that was modified considering the factor of influence of digitalization on the GDP. Modern trends in the field of competition between cheap, but low-skilled labor, and expensive highly qualified labor, determine the need for analytical studies in the field of changing the existing factors of labor in the process of digital transformation. A special role in construction of a model that reflects the influence of various factors of changes within the framework of the sixth technology revolution is given to assessing the significance of the parameters under study in recent times. Wherein, special attention is focused on the need for further study of time lags reflecting the maximum return on use of labor, capital and digital resources.

The purpose of this issue is to analyse how efficient the resource providing innovation processes in Russian regions is. This issue gives a hypothesis that says: the assessment of innovation activity’s full efficiency should be carried out only if three criteria are met: effectiveness, productivity and optimality. An analysis of innovation processes was conducted in the context of regions of the Central Federal District (CFD) for the period of 2010-2017. In most regions, there was a decrease in the estimated parameter over the mentioned period of time. These trends are caused by the decrease in the amount of technological innovation costs with an optimal ratio of the volume ratio of innovative goods made, work and services. The research results can be useful for federal and regional executive authorities. They can formulate and adjust the planned strategy of socio-economic development and calculate the cumulative efficiency indicator of innovation processes.

The article reviews an impact of innovation activity of the territories on the basis of the available resource potential by the introduction of resource-saving technologies. A correlation analysis of the relationship between gross domestic product and energy consumption has been carried out. A practice of a some countries on energy intensity reduction has been analyzed. A cluster analysis of the energy sector in a some countries was been completed.

In this article, we study the errors in the assembly of parts, taking into account the deviation of the shape of their surfaces. The developed computer model of the assembly of the engine low-pressure turbine rotor is designed to predict the values of the assembly parameters, such as radial and face run-out. The forecasting of the above assembly parameters is carried out based on the data of actual dimensions and shape of the surfaces of parts assembled as an assembly unit. The analysis of study results made it possible to obtain a conclusion about the qualitative influence of geometrical errors of the assembled parts on the error of the assembly parameters.

Thermodynamic analysis shows that for flights with velocities exceeding six sound velocities, it is required to burn fuel not in a subsonic but in a supersonic flow. The aim of this work is to investigate the possibility of creating a stationary combustion front in a supersonic flow by igniting the mixture with an attached microwave discharge. Discharges are created on the resonator by means of a pulsed source of quasi-optical microwave radiation. This method of initiation is one or two orders of magnitude more economical than other known methods of plasma ignition and combustion stabilization. A numerical evaluation and comparison with experiment of the propagation velocity of a subcritical streamer discharge in a stationary medium and in a supersonic drifting flow are performed. Experiments have been conducted to ignite a flat flow of propane-air mixture, as well as ignition of the propane stream fed into the airflow, which simulates the operation of the fuel injector. In all cases, the experiments confirmed a steady fuel combustion, which was controlled by the temperature measurements with a thermocouple.

In this article authors set out a principle of pitting corrosion protection, suggested a new class of multilayer materials with high corrosion resistance. They substantiated the choice of the layers for the multilayer material designed for exploitation in oxidizing and non-oxidizing environment. The sphere of application of the multilyer materials was defined.