Coherent X-radiation generated by relativistic elektron along its velocity in periodically lavered medium

Dynamic theory of coherent X-radiation generated by relativist.ic electron crossing multilayered medium is developed. It is found the radiation along the electron velocity vector in Bragg’s scattering geometry for general asymmetric case. The comparison of analogous radiation generated by relativist.ic electron in the single crystal medium is done. The developed theory predicts some conditions under which this coherent, radiation exists and also it describes its spectral and angular characteristicsyesБелгородский государственный университе

Developing competency profiles of IT specialists based on semantic analysis of vacancies

The article focuses on applying Big Data processing methods and tools for creating specialists' competency profiles. It covers the approach developed to formulate the key competencies required for the IT vacancies. The first stage of the research includes carrying out a semantic analysis of the IT vacancies database. The second stage includes clustering of the results of semantic analysis and using them for building the map of the competencies of IT specialists. The modularity score reveals a significant isolation of the specialties in this area. The performed approach can be implemented in designing the professional standards and competency based education programs. © Published under licence by IOP Publishing Ltd

Melting Point and Lattice Parameter Shifts in Supported Metal Nanoclusters

The dependencies of the melting point and the lattice parameter of supported metal nanoclusters as functions of clusters height are theoretically investigated in the framework of the uniform approach. The vacancy mechanism describing the melting point and the lattice parameter shifts in nanoclusters with decrease of their size is proposed. It is shown that under the high vacuum conditions (p<10^-7 torr) the essential role in clusters melting point and lattice parameter shifts is played by the van der Waals forces of cluster-substrate interation. The proposed model satisfactorily accounts for the experimental data.Comment: 6 pages, 3 figures, 1 tabl

Развитие перспективных сетевых тренажерных комплексов на воздушном транспорте с применением нечетких моделей и помехоустойчивого кодирования

The article analyzes foreign experience and concludes that one of the ways to improve the efficiency of aviation security in the Russian Federation is to use modern network training complexes. A new approach to the assessment of the competence of the aviation security screeners was proposed and tested, that allows to take into account the parameters of the oculomotor activity and heart rate variability of the aviation security screeners being tested, different from the existing approaches using fuzzy classification models. The eye-tracking technology and the device of psychophysiological testing UPFT-1/30 "Psychophysiologist" were used as instruments of psychophysiological monitoring. The basics of automatic generation of fuzzy models such as Sugeno and Mamdani from experimental data are presented. Experimental studies were conducted on the basis of the Ulyanovsk Civil Aviation Institute. The results of the comparison of the generated models showed that the Sugeno model trained with the use of ANFIS-algorithm is more accurate than the Mamdani model and the linear regression model identifies the dependence being studied, according to the competence of aviation security screeners. As a criterion of quality of models on training and test data the average square error is used. The actual problem of choosing an effective concept of noise-resistant coding in the telecommunication component of advanced training complexes is substantiated. The ways of solving the important problem of increasing the reliability of actual digital data in network training complexes based on the use of noise-resistant coding are described. A model of permutation decoder of non-binary redundant code based on lexicographic cognitive map is presented. This model of redundant code decoder uses methods of cognitive data processing in the implementation of the procedure of permutation decoding to effectively protect remote control commands from the influence of destructive factors on the control process.В данной работе проведен анализ зарубежного опыта и сделан вывод, что один из путей повышения эффективности обеспечения авиационной безопасности в Российской Федерации заключается в применении современных сетевых тренажерных комплексов. Предложен и апробирован новый подход к оценке уровня компетентности операторов досмотра, позволяющий учитывать параметры глазодвигательной деятельности и вариабельности сердечного ритма испытуемых операторов, отличающийся от существующих подходов применением нечетких моделей классификации. В качестве аппаратурных средств психофизиологического мониторинга использованы технология Eye tracking и устройство психофизиологического тестирования УПФТ-1/30 «Психофизиолог». Представлены основы автоматической генерации нечетких моделей типа Сугено и Мамдани из экспериментальных данных. Проведены экспериментальные исследования на базе ФГБОУ ВО УИ ГА. Результаты сравнения сгенерированных моделей показали, что модель Сугено, обученная с применением ANFIS-алгоритма, точнее, чем модель Мамдани и модель линейной регрессии, идентифицирует исследуемую зависимость по оценке компетентности операторов досмотра. В качестве критерия качества моделей на обучающих и тестовых данных использована средняя квадратическая ошибка. Обоснована актуальная задача выбора эффективной концепции помехоустойчивого кодирования в телекоммуникационной составляющей перспективных тренажерных комплексов. Описаны пути решения важной задачи повышения достоверности актуальных цифровых данных в сетевых тренажерных комплексах на основе применения средств помехоустойчивого кодирования. Представлена модель перестановочного декодера недвоичного избыточного кода на базе лексикографической когнитивной карты. Данная модель декодера избыточного кода использует методы когнитивной обработки данных при реализации процедуры перестановочного декодирования для эффективной защиты команд дистанционного управления от влияния деструктивных факторов на процесс управления

Wheat landraces as sources of high grain quality and nutritional properties

Background. Improving the grain quality of modern spring bread wheat cultivars is a highly relevant task of breeding. To solve this problem, old and local wheat varieties (landraces) are of considerable interest. A rich collection of them is available among the plant genetic resources preserved at VIR. With this in view, the aim of this research was to identify sources of high protein, gluten, macro- and micronutrient content out of the landraces from the VIR collection for improvement of wheat grain quality through breeding.Materials and methods. Field and laboratory research were conducted in the experimental field of Omsk State Agrarian University under the conditions of the southern forest-steppe of Western Siberia in 2020–2021. Sowing was carried out on fallow on conventional sowing dates. Mineral composition in the grain of the studied landraces was analyzed at the Kurchatov Genomic Center, Novosibirsk, using atomic absorption spectrometry techniques.Results. The research results showed that landraces from different regions of Russia, Kazakhstan, Tajikistan, and Kyrgyzstan were characterized by high levels of protein (18.4–18.8%) and gluten (35.9–36.0%) in grain. Landraces from Kazakhstan had low Zn content (on average 38.3 mg/kg), while those from Kyrgyzstan, on the contrary, had high content of Zn (41.9 mg/kg) and Fe (55.1 mg/kg), and landraces from Tajikistan had high K content (3820 mg/kg). A positive relationship between the concentrations of Mg, Mn, Fe, and Zn was found in the grain of wheat landraces.Conclusion. Wheat landraces are of interest as genetic resources for the development of high-protein cultivars with improved nutritional value of grain for the milling and breadmaking industries

Development of a cooling system for 6U module based on Elbrus microprocessor

The article discusses the design features of cooling systems for compact Eurocard format modules based on the Elbrus microprocessor. The issue of ensuring the necessary thermal regime of the processor module in the space shortage conditions in order to accommodate the cooling system has been solved. The estimated calculation showed the underperformance of the passive cooling of the Elbrus-4S microprocessor with a heat output of 60 W. In this regard, a 3D model of an active cooling system with 5.5×10.3×4.6 cm dimensions was developed. Thermal calculations were performed using the SolidWorks Flow Simulation program in order to optimize the radiator geometry and fan speed. It was assumed that an optimized cooling system will ensure that the chip temperature of the Elbrus-4S processor is no more than +87 °C (at an ambient temperature of +55 °C). Based on the results of the study, three prototypes were produced for testing. Further tests conducted on prototypes showed the efficiency of the cooling system and the high accuracy of the simulation results. During tests in a climatic chamber at a temperature of +55 °C, the temperature on the microprocessor chip did not exceed +84 °C (a difference of 3 °C compared to the estimated one)

DAILY BLOOD PRESSURE MONITORING OF YOUNG PATIENTS WITH THE SYNDROME OF CONNECTIVE TISSUE DISPLASIA

The study is focused on the estimation of daily BP profiles in young patients with the syndrome of connective tissue displasia. A considerable party of them shows a strong evidence of altered balance between pressoric and depressoric mechanisms of BP regulation. We have verified two kinds of cardiovascular reactions in connective tissue displasia. Half of those examined, according to the postural test, exhibit altered adaptive potential

The development of advanced network simulators for air transport by using fuzzy models and noise-resistant coding

The article analyzes foreign experience and concludes that one of the ways to improve the efficiency of aviation security in the Russian Federation is to use modern network training complexes. A new approach to the assessment of the competence of the aviation security screeners was proposed and tested, that allows to take into account the parameters of the oculomotor activity and heart rate variability of the aviation security screeners being tested, different from the existing approaches using fuzzy classification models. The eye-tracking technology and the device of psychophysiological testing UPFT-1/30 "Psychophysiologist" were used as instruments of psychophysiological monitoring. The basics of automatic generation of fuzzy models such as Sugeno and Mamdani from experimental data are presented. Experimental studies were conducted on the basis of the Ulyanovsk Civil Aviation Institute. The results of the comparison of the generated models showed that the Sugeno model trained with the use of ANFIS-algorithm is more accurate than the Mamdani model and the linear regression model identifies the dependence being studied, according to the competence of aviation security screeners. As a criterion of quality of models on training and test data the average square error is used. The actual problem of choosing an effective concept of noise-resistant coding in the telecommunication component of advanced training complexes is substantiated. The ways of solving the important problem of increasing the reliability of actual digital data in network training complexes based on the use of noise-resistant coding are described. A model of permutation decoder of non-binary redundant code based on lexicographic cognitive map is presented. This model of redundant code decoder uses methods of cognitive data processing in the implementation of the procedure of permutation decoding to effectively protect remote control commands from the influence of destructive factors on the control process

Coherent X-radiation generated by relativistic elektron along its velocity in periodically lavered medium

yesDynamic theory of coherent X-radiation generated by relativist.ic electron crossing multilayered medium is developed. It is found the radiation along the electron velocity vector in Bragg’s scattering geometry for general asymmetric case. The comparison of analogous radiation generated by relativist.ic electron in the single crystal medium is done. The developed theory predicts some conditions under which this coherent, radiation exists and also it describes its spectral and angular characteristicsБелгородский государственный университе