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Researchers from all over the world are studying environmentally friendly, resource-saving, efficient technologies. Hydrogen fuel is recognized as one of the most promising energy resources in the near future. Hybrid power plants make it possible to use hydrogen fuel in the most efficient way. The structure of hybrid power plants includes an electrochemical plant and a mechanical generator. Thus, the solid oxide fuel cell (SOFC) works in conjunction with the gas microturbine. Hybrid power plants have high efficiency of about 60-70%. Another important advantage is the possibility of recycling hydrogen-containing gases (gaseous waste from industrial enterprises) instead of burning in the atmosphere. The purpose of the article is to develop a technological scheme of a hybrid power plant, including a 1 kW SOFC and a 30 kW gas turbine, and to calculate its technological parameters, flows and connections. The hybrid power plant is equipped with additional carbon dioxide capture technologies to achieve decarbonization of the energy production process.

It is shown that single-mode fluorosilicate optical fibers fabricated with the aid of modified chemical vapor deposition exhibit a significant decrease in the radiation resistance when 1 mol % GeO2 is introduced into the silica-glass core. Elimination of chlorine and OH group impurities in the silica glass of the core of the fluorosilicate single-mode fiber leads to a relatively low level of radiation-induced attenuation. Prior to radiation processing, the loss factors of optical fiber are 0.18 and 0.3 dB/km at wavelengths of 1.55 and 1.31 μm, respectively. The dependence of optical loss of such fibers on the bend diameter ranging from 6 to 12 mm is studied.

This article concerns experimental and simulation results on nonstable latchups (SLs) in CMOS integrated circuits (ICs) under pulsed laser irradiation. Different transient responses in elements of the p-n-p-n structure and irregular ionization distribution on the IC surface are the main reasons for non-SLs. Radiation experimental test results are presented as well as a discussion of non-SL mechanisms.

The article presents an overview of experimental layout design solutions and the general operation scheme of combined heat and power systems with a high-temperature solid oxide fuel cell (SOFC). This system is an environmentally friendly and energy-saving way to produce electricity and heat. The use of high-temperature SOFCs makes it possible to obtain an electrical efficiency of 45–55%. Combining the electrochemical and mechanical system can increase the total efficiency by up to 60–65% in a hybrid power plant. This article discusses the structure and relationship between the components of a hybrid power plant and various modification options for efficient power generation. The technological schemes for existing and tested hybrid power plants with an SOFC and gas turbine are presented and described in detail. When designing a hybrid power plant, the key factors are the choice of design, heat source, and fuel-reforming method; the design of a solid oxide fuel cell and the number of modules in a stack; selecting devices for generating electricity with the development of cogeneration or trigeneration cycles (for possible use in thermal power plants and for the energy supply of social facilities); the direction of material flows within the system; pressure and tightness; and the interconnection of the hybrid power system elements. Researchers have accumulated and described in scientific papers extensive experience in designing, theoretical research, and numerical modeling of hybrid power plants with high-temperature SOFCs. It is shown that experimental hybrid power plants based on SOFCs of the megawatt class are in operation. Hybrid systems with an SOFC are designed only for the kilowatt power class. Trigeneration systems with a steam turbine exist only in the form of theoretical calculations. Trigeneration systems show the highest electrical efficiency, but the highest construction and service costs. Systems based on high-temperature SOFCs can be used for autonomous systems, and in combination with gas and steam turbines only at thermal power plants. Experimental laboratory studies are limited by the high cost of installations and the difficulties of testing the possibility of using combined heat and power systems on an industrial scale. Therefore, a more detailed study of the relationship between the units of a combined heat and power system is recommended in order to achieve the high efficiency indicators obtained from theoretical studies.

The paper presents the comparative results of spectrum degradation organic light-emitting diode with different dominant wavelengths. The diodes were exposed with stationary gamma-irradiation at room and low temperatures. The research has shown moderate degradation of the light-emission spectrum when exposed at room temperature and significant degradation at low temperature. The greatest deterioration in the optical parameters was observed for organic light-emitting diodes with blue and white light emission color.

The paper concerns experimental results on external conditions such as temperature, voltage supply, current limit, and features of the power circuit on latchup occurrence under uniform laser irradiation.

In an Integrated Circuit with high SEL holding voltage, pulsed-laser radiation sensitivity was found to change due to TID irradiation. The impact of TID on the DUT SEL holding voltage and SEL sensitivity was investigated.

An advanced thermoelectric system has been developed to set a low temperature to the heat-generating power semiconductor devices. The system provides the setting the temperature down to -60°C in a volume of 80x40x12 mm3 at the heat-release up to 13 W. Accuracy of setting the temperature is in the range of ± 3°C. The design of developed system is adopted for long-term tests, including tests in harsh environment. The cooling chamber in may be placed up to 6 m away from the heat exchanger and control unit. One of the main features of new development is its mobility and easy installation when carrying out various types of tests.

The paper discusses the features and the possibilities of the under-development scanning confocal microscope in tasks of non-destructive examination of semiconductor electronics using the method of confocal microscopy with an emphasis on the possibility of studying the material and internal structure. The described technique allows studying integrated circuits from the substrate side of integrated circuits. This work is part of a global task and is devoted to mathematical modeling of the scanning process.

A description of the system for setting a lowered environment temperature based on Peltier modules is presented. The development was carried out taking into account the peculiarities of the radiation test: minimum distance from exposure source to DUT; stand-alone use during long-term radiation test; minimum overall dimensions, transportability and flexibility when conducting tests on various exposure sources. Cooling box consists of 3-level stacked assembly of the Peltier modules, which is cooled by liquid refrigerant. Control of the assembly of Peltier modules was performed according to proportional integral and differential algorithm, provided by microcontroller with feedbacks on Pt thermoresistors. The system provides temperature stabilization of the DUT up to 23х17х12 mm in size and with released heat power up to 0.4 W at minus (60 ± 3) oС. Temperature establishing time is less than 10 minutes. Typical power consumption of developed system is about 500W.

a division of labor plays significant role in the efficiency of laser SEE Testing. The highest efficiency can be achieved when testers fulfill their roles in a global task: one is engaged in debugging and monitoring the testing progress at the facility, another one participates in the preparation and performance monitoring of the device under test (DUT). This article describes the architecture of our software for SEE testing that consists of two parts: the one responsible for the functional testing of the DUT and another one responsible for the SEE testing logic. Separating these two parts allows them to be developed independently by different specialists. The DUT part of software controls a wide variety of equipment including National Instruments PXI/PXIe modules which are commonly used for functional testing of the devices under test. The laser SEE testing part of software controls all parts of the laser facility (laser beam positioning and pulse synchronization, visualization of exposure area, etc.) and the acquisition of laser SEE testing data. One of the main points of this paper is the idea of communication between the apps on different platforms (Microsoft .NET and NI LabVIEW) over local area network.

Singe event effect (SEE) simulation in modern integrated circuits (ICs) by femtosecond laser irradiation through the substrate allows eliminating a lot of problems connected to the presence of multiple opaque metal layers above the IC active layer. With this irradiation geometry, the proper wavelength of laser radiation should be chosen to generate sufficient amount of nonequilibrium charge in the active layer on the one hand, and to avoid significant laser energy losses in the thick substrate on the other hand. In this paper several typical microelectronic ICs were selected to investigate the dependence of SEE generation effectiveness on the laser wavelength when irradiating through the substrate of various thickness. It was found, that the most appropriate laser wavelength for the silicon substrate thicknesses of 300 to 800 μm lies in the 1030 to 1070 nm range

In this article, the authors propose an approach to the security analysis of program code using vector representations of machine instructions. The article also proposes a method for constructing multidimensional vector spaces for a set of program code instructions. The construction of semantically expressive vector representations of machine instructions is considered as one of the important tasks in constructing a neural network code classifier for vulnerabilities. The applicability of the principle of transfer learning to machine code is demonstrated experimentally.

This article proposes an approach to identifying integer overflow vulnerabilities in software represented by the executable code of x86 architecture. The approach is based on symbolic code execution and initially twofold representation of memory cells. A truncated control transfer graph is constructed from the machine code of the program, the paths in which are layer-by-layer checked for the feasibility of the vulnerability conditions. The proposed methods were implemented in practice and experimentally tested on the various code samples.

This paper is devoted to solving the problem of developing a case-based decision support system for information security problems. The source data can be described as heterogeneous semistructured objects and formalized as property vectors. An approach to constructing a knowledge base for such problems using a two-level representation (the level of case-objects and the use case structure level) is given. The authors consider a use case modeling method for preparing a basic data set. Methods for assessing the similarity of heterogeneous semistructured objects and higher-level use cases are proposed. Results of experimental approbation of the described solutions and the architecture of the corresponding decision support system are presented.

In this work considered the problem of safety analysis of control mechanisms in modern information systems, including control software systems of cyberphysical and industrial facilities, digital control systems for distributed cyber environments VANET, FANET, MARINET, industrial Internet of things and sensor networks. The representation of security violation as a property of the system described by a complex function is proposed, in which the method of finding violations is described in the form of approximation of that function and the calculation of its values for specific systems. Various approaches to the interpolation of such function are considered in the work, it is shown that the most promising option is the use of deep neural networks.

A technology for preventing a full range of attacks on routing in self-organizing adhoc networks (MANET, VANET/FANET/MARINET, IoT, WSN, mesh networks, M2M networks, etc.) is presented. The new technology develops the Watchdog method and the method of estimating the packet transfer coefficient (P-Secure) by implementing an ant swarm algorithm for constructing a secure route in the network, in which all nodes are agents for analyzing the security of neighboring nodes. An example is given of constructing a safe route in the VANET network using the created ant swarm algorithm.

The aim of this work was to develop a fabrication process of single-mode polarization-maintaining germanosilicate optical fibers with elliptical core (GOFEC) doped with 20 mol % GeO2. The fiber preform was fabricated by MCVD method. The low-oxygen central piece of the core in the preform was removed by high-temperature chemical gas-phase etching. The influence of γ-radiation with a dose rate of 1 Gy/s on the optical losses in GOFEC at a wavelength of 1550 nm and at 25°C and −60°C were investigated. Their radiation resistance at −60°C is proved to surpass that of the existing analogous fibers. It has been found that the radiation-induced attenuation in such highly doped GeO2 single-mode fibers is higher than that in multimode fibers. In contrast to multimode fibers, radiation resistance in single-mode fibers depends on the material of the core and cladding. As to the radiation resistance, these GOFEC are comparable with the fiber of PANDA type with a pure silica glass core.

Intelligent data analysis is extensively applied in various fields of technology, including information security. The development of decision support systems (DSSs) for penetration tests is more complicated due to incomplete, undefined, and expandable unstructured data. This article suggests an approach to formalizing information from subject domains, quantitative relevance estimates of object characteristics, and estimates of object similarity.

The paper addresses a problem of lightweight vulnerability detection in program code, represented by MIPS instruction set, which is widely used in network and IoT devices. For these purposes, it is proposed to use the Siamese neural network, which was involved both for pre-training the instruction embeddings, and for training the code vulnerability classifier. Instruction embeddings are obtained by solving auxiliary task of matching the semantically equivalent code pieces. Proposed approach has been tested on publicly available dataset and gave positive results.

The radiation hardness results of light emitting diodes (LED) in green, blue and red regions of the spectrum and in white, based on InGaN, GaN and AlInGaP structures are presented. The technical aspects of monitoring parameters during exposure are described, and LEDs response to various radiation exposures are given.

A method for radiation hardness evaluation of digital and microwave transmitting-receiving optoelectronic modules is presented. The technical aspects of parameters monitoring during exposure are described. The most vulnerable components of optoelectronic modules are identified.