In this paper, statistical expressions describing the change in the degree of coherence of broadband laser radiation with an inclined coherence layer in a homogeneous medium are theoretically studied. The case of changes in the spatial coherence of intersecting broadband light beams with parallel layers of coherence is considered. An assessment of the region of coherent interaction for this case is given, and it is determined that the degree of coherence of a dispersed beam decreases noticeably faster with distance than in the case without the use of a dispersive element. Within the framework of the models used, it was found that the violation of coherence during the propagation of a light beam increases with increasing angle of inclination of the coherence layers. The possibility of significantly increasing the area of coherent interaction of intersecting beams as a result of tilting their coherence layers in such a way that by setting a certain value of the angle of their intersection it was possible to obtain parallelism of the coherence layers for them was also studied. In this case, restrictions on the transverse size of the overlapping beams are removed and it becomes possible to use the entire area of their overlap. A general scheme for constructing the asymptotics of the obtained analytical solutions was outlined. It is shown that the universal nature of asymptotic methods for calculating wave impulses can be supplemented with some universal heuristic conditions and criteria for the applicability of these methods. These criteria provide internal control over the applicability of the asymptotic methods used, and in a number of cases, based on the formulated criteria, it is possible to evaluate wave fields where these methods are not applicable. This opens up wide possibilities for analyzing wave patterns as a whole, which is important both for the correct formulation of theoretical studies and for carrying out evaluation calculations during experimental or field measurements of wave packets of laser radiation.

One of the innovative projects of Gen- IV reactors is a high-temperature gas-cooled reactor able to generate heat with a coolant temperature of up to 950–1000 °C, which makes it possible to produce hydrogen and other useful products without CO₂ emissions. A distinctive feature of such reactors is the use of micro fuel rods dispersed in a graphite matrix, a fuel compact (FC). The commercialization of high-temperature gas-cooled reactors requires the reliability and performance of their components to be confirmed. Therefore, one of the tasks is to study fuel compacts with micro-spherical fuel (MF). To address this task, reactor tests and post-irradiation examinations of fuel compacts with micro fuel rods shall be performed. To test fuel compacts in a helium environment, a capsule-type irradiation rig shall be designed that allows sampling of the gas environment from cavities with fuel compacts to analyze the FGR dynamics. The paper presents a rationale for the irradiation rig (IR) design to conduct reactor tests of fuel compacts with micro-spherical fuel with the possibility of real-time analysis of the radioisotope composition of the gas environment where the fuel compacts are located using semiconductor gamma spectrometers.

The article presents the results of modeling temperature fields in multi-layer road pavement based on monitoring results on an operating road. The relevance of the work is due to the high influence of temperature on the elastic moduli of asphalt concrete, and, as a consequence, on the results of tests to assess the strength of road pavements performed under different temperature conditions. The research included an analysis of data accumulated over a long period of time from a temperature monitoring station installed during the construction of the highway. A technique is proposed based on solving the problem of thermal conductivity for each cohesive layer of road pavement, taking into account the continuity of temperature and heat flux density when passing through interlayer boundaries, which makes it possible to determine the temperature field in the first layer at an unknown temperature on the surface and clarify the mechanical and thermophysical parameters of the rest layers. An analysis was carried out of the degree of heterogeneity of temperature distribution across layers in different periods of the year, allowing for strength tests. Directions for further research are outlined to update the obtained methods, taking into account the use of modern types of asphalt concrete in road pavement structures.

The paper considers the nonlinear heat equation in a one-dimensional plane-symmetric case. For him, on the interval [0; p] the Cauchy problem with continuous initial data is posed. These data evenly continue to the segment   [–p; 0], and then with a period of 2p on the entire numerical axis. The solution to the resulting Cauchy problem is represented in the form of a corresponding trigonometric series in cosines from the spatial variable. The coefficients of the series are the desired functions of time. For these coefficients, an infinite system of ordinary differential equations is given with the corresponding initial conditions. Finite segments of trigonometric sums are constructed that approximately convey the solutions of the considered Cauchy problems.

The work examines in detail the term «supply chain management» (SCM), which is becoming more and more relevant every day. The main goal of the study is to analyze the SCM system in Russia, focusing on identifying key trends and challenges faced by companies and organizations in the field of logistics. The importance of SCM as a strategic asset for modern enterprises is also highlighted. To achieve this goal, methods such as analyzing the current state of SCM and studying trends in logistics in the Russian context were used. Data analysis and assessment of the impact of SCM on efficiency, costs, and customer satisfaction were conducted. The study also identified the main problems in the SCM system in Russia and demonstrated how SCM is an integral part of successful enterprise operation, contributing to supply optimization and increased efficiency. It also allows companies to adapt to rapidly changing market conditions and manage risks, increasing their competitiveness. SCM is an important strategic direction for companies, providing them with flexibility in the economic environment and helping them to successfully cope with emerging challenges. Therefore, attention to the SCM system is an integral part of the development strategy for modern organizations.

A technique for using digital filters to classify control signals in real time is proposed. Signals can come from various control sensors installed on a controlled device, such as a mobile robot. Control signals come from sensors, are processed, classified, and are subsequently used to control a mobile robotic device. There are a large number of signal classification algorithms, which are based on identifying the characteristic features of the signal, such as amplitude, frequency, average value, etc. Most algorithms classify signals based on characteristics in the time domain. In this work, it is proposed to use the frequency characteristics of the signal and, on their basis, carry out classification using narrow-band «comb» digital filters. The base frequencies of the control signal are pre-staged using fast Fourier transform. Once the base frequencies are determined, the classification process consists of filtering the raw signal with a set of digital narrow-band «comb» filters. This approach allows you to classify control actions «on the fly» in real time. Digital filters can be used to classify different types of signals, which are further converted into control commands for a mobile robotic device.

The article presents the implementation of a control system for a mobile robot in ROS2 environment using static hand gestures recognized using electromyogram (EMG) signals. The key component of this system is the algorithm for converting raw EMG signal into discrete control commands. In this implementation, the principle of generating control commands to handle mobile robot movement is considered. Also, various characheristics of gestures, such as their complexity of execution and recognition, as well as the degree of physical fatigue of the operator when performing a gesture for a long period of time, have been considered in the design of the command system. Gesture recognition based on data from 2 EMG sensors is implemented using a neural network. The developed control system was integrated with the software interface of the mobile robot in the ROS2 environment. The presented system has shown a high degree of reliability in testing, as well as the convenience of its use by test subjects.

The article presents possible methods for extracting spent sealed sources of ionizing radiation from non-container storage facilities located at radioactive waste storage facilities of the Federal State Unitary Enterprise «RADON», and identifies problematic issues associated with solving this problem. The importance and relevance of the topic under consideration is shown within the framework of the implementation of the program for the rehabilitation of «nuclear heritage» objects in the absence of experience in removing spent sealed sources of ionizing radiation from storage facilities of this type in modern conditions. A brief description and existing design features of containerless storage facilities for spent sealed sources of ionizing radiation located on the territory of radioactive waste storage facilities are provided. Information is presented on completed and planned research and development work aimed at implementing methods for extracting spent sealed sources of ionizing radiation from containerless storage facilities. The practical application of methods for retrieving spent sealed sources of ionizing radiation from containerless storage facilities within the framework of the implementation of projects for the decommissioning of radioactive waste storage facilities is described. Conclusions are drawn about the prospects obtained by implementing the presented methods for extracting spent sealed sources of ionizing radiation from containerless storage facilities.

The methodology for utilizing the Digital Decommissioning platform for digital support during the various stages of decommissioning nuclear facilities is considered. The primary focus is putted on the fundamental principles of the platform, specifically the mandatory building and utilization of detailed 3D-models of the nuclear facilities throughout the preparation and execution of decommissioning. The usage of Digital Decommissioning platform modules during the preparation and execution stages of nuclear facility decommissioning is described, including the building of detailed digital engineering and digital engineering and radiation models of the facilities, as well as the subsequent digital design of their decommissioning and for reusing valuable engineering practices during the development of decommissioning projects for future facilities that are out of service.