CURRENT STATE OF THE SPACE ELEMENT BASE

The article considers the current state and the main promising areas of scientific and practi-cal developments in the field of radio electronics. For the space application of mechatronic systems, the microcircuits are characterized by multi-nomenclature low-volume indicators. To create a high-ly reliable electronic component base, it is necessary to ensure resistance to the fields of ionizing radiation from space, a wide range of temperatures and mechanical stresses. This requires the crea-tion of ECBs for space applications that are resistant to these external influencing factors.

Preface

9 International Conference «Actual Trends in Radiophysics» in 2021 was held in Tomsk, Russia from 20th to 22th october 2021. International Conference became worthwhile platform for researchers to present their finding in the areas «Physics of radio waves: radiation, reception and use», «radio electronics and electrodynamics of microwave, extremely high frequencies and hyper high frequencies», «Solid-state electronics, micro- and nanoelectronic», «Laser and optoelectronic systems: development, creation, application», «Quantum electronics and photonics», «Modern measuring instruments and technologies», «Modern problems and technologies for training specialists in the field of radiophysics, radio engineering and optics». It aims to provide an international cooperation and exchange platform for experts, scholars and enterprise managers in the fields of the application of radiophysics to share research results, discuss existing problems and challenges and explore cutting-edge technologies. COVID-19 Update: For reasons of Covid 19, the conference changed its time from September 20-22 to October 20-22 and was held in full-time format. This scientific event brings together more than 10 national and international researchers in radiophysics. On top of the local participants coming from different national universities, international participants are also registered from different countries. During the conference, the conference model was divided into seven sessions, including oral presentations, keynote speeches, and Q&A discussion. In the first part, keynote speakers were each allocated 20-30 minutes to hold their speeches. Then in the second part, some scholars, whose submissions were selected as the excellent papers, were given about 10 minutes to perform their oral presentations one by one. List of Program Committee, Organizing Committee, Editorial Committe are available in this pdf.

Degradation processes in tungsten filaments at high temperatures

Degradation processes in tungsten filaments of lighting lamps under normal operating conditions are experimentally studied. The duration of each measurement in continuous mode is about 18 hours. To increase the measurement accuracy, subtraction (compensation) of the constant component of the voltage is used. To compensate for the constant component of the voltage, a low noise reference DC voltage source is used. Using this scheme allowed decreasing the influence of the inherent noise of power supplies without suppressing degradation processes. It is shown that the relative change in resistance during the measurement does not exceed 2.8·10−3. It is also shown that the joint influence of voltage fluctuations of power supplies and low noise reference voltage source on the measurement results corresponds to a relative change in a resistance equal to 2.8·10−4. The study of degradation processes can be used to assess the reliability (and durability) of products in electrical engineering and radio electronics.

The Influence of a 3D Model of a Radio Electronic Component on Thermal Simulation

Very often, when designing and developing radio electronic devices, engineers are regularly faced with the need to solve various kinds of problems to ensure the operation of a product under the required mechanical loads or thermal conditions during operation. One of the main issues that arise when conducting thermal modeling of radio electronics is the correct assessment of the results. There are a number of electronic components that need to be cooled, mainly through a printed circuit board: power supply transistors, power diodes, microcircuits, etc. For such elements, 90% (or more) of the heat flux from the component is diverted through the printed circuit board, and then to the radiator. Therefore, when carrying out the simulation, it is necessary to have previously obtained reliable temperature results on the power elements. The use of a detailed 3D model for modeling is most often unjustified and can introduce certain errors in the calculations. This article compares different 3D transistor models and the effect of detailing on the modeling process in CAD SolidWorks.

Adaptation Trajectories of Dismissed Workers: A Critical Case Study of the Lithuanian Radio-Electronics Sector

This article explores why some dismissed workers adapt successfully to the changing structure of an economy, while others remain trapped in low-quality jobs and experience deskilling. The associated case study relies on in-depth, semi-structured interviews with 50 former employees of four bankrupt radio-electronics factories in Lithuania. It is found that workers with ‘inherited’ skills that are deep and technical are able to enter high-quality jobs when new firms emerge, recombining the physical, financial and human assets of destitute factories for new productive uses. However, if such economic opportunities are scarce, workers with inherited broad skill sets are relatively more successful in transitioning to services from manufacturing. Further, in line with the literature of the sociology of work, women and older workers are found to face more acute challenges in adapting to the economic shock associated with dismissal.

Mathematical Foundations of the Fractal Scaling Method in Statistical Radiophysics and Applications

The system of basic mathematical concepts and constructions underlying the modern global fractal-scaling method developed by the author is presented. An overview of the main results on the creation of new information technologies based on textures, fractals (multifractals), fractional operators, scaling effects and nonlinear dynamics methods obtained by the author and his students for more than 40 years (from 1979 to the present) at the V.A. Kotelnikov Institute of Radioengineering and Electronics of RAS. It is shown that, for the first time in the world, new dimensional and topological (and not energy!) Features or invariants were proposed and then effectively applied for problems in radio physics and radio electronics, which are combined under the generalized concept of "sample topology" ~ "fractal signature". The author discovered, proposed and substantiated a new type and new method of modern radar, namely, fractal-scaling or scale-invariant radar. It should be noted that fractal radars are, in fact, a necessary intermediate stage on the path of transition to cognitive radar and quantum radar.

English for IT-Specialists

The course is designed in the e-learning environment LMS MOODLE AND INTENDED FOR REMOTE SUPPORT of the 2d-year students' INDEPENDENT WORK IN THE DISCIPLINE «ENGLISH language» of the institute of radio electronics and information security and the Institute of Information Technology and Management in technical systems in Sevsu. The aim of the course is the bachelor training, who can speak foreign language in various situations of interpersonal and professional communication at the level of at least B1+ according to the international scale EVALUATION; IMPROVING THE INITIAL FOREIGN LANGUAGE level reached at previous levels of education; mastering of the necessary and sufficient level of competence FOR SOLVING SOCIO-COMMUNICATIVE TASKS IN VARIOUS spheres OF PROFESSIONAL AND SCIENTIFIC ACTIVITIES WHEN COMMUNICATING WITH FOREIGN PARTNERS; FURTHER SELF-EDUCATION.

TRANSMISSION OF HOLOGRAPHIC INFORMATION ON A SINGLE SIDEBAND

When holographic information is transmitted through communication channels, a problem arises associated with the large capacity of holograms. In the patent of the Russian Federation No. 2707582, the possibility of compressing holographic information was shown, similar to the transmission on one sideband known in radio electronics. The experimental transmission of such compressed information over a Wi-Fi wireless communication channel with a frame rate of more than 25 frames per second is shown in this paper. The experiment of transmitting holographic information of 3D images over a wireless Wi-Fi communication channel to simulate 3D video using the FTP protocol was carried out. In accordance with the RF patent No. 2707582, each transmitted frame of a 3D image was the sum of two 2D frames-a texture (2000x2000 pixels) and a mask (1000x1000 pixels). To simulate the transmission of a video sequence, packets of 500 double frames were transmitted simultaneously. The transmission times of these frame packets measured in real time by FileZilla showed that the transmission of full holographic information about a 3D object in real time with a frame rate greater than 25 frames / sec. quite feasible.