21 research outputs found
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 Braggβs 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 characteristicsyesΠΠ΅Π»Π³ΠΎΡΠΎΠ΄ΡΠΊΠΈΠΉ Π³ΠΎΡΡΠ΄Π°ΡΡΡΠ²Π΅Π½Π½ΡΠΉ ΡΠ½ΠΈΠ²Π΅ΡΡΠΈΡΠ΅
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. Β© 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
Π Π°Π·Π²ΠΈΡΠΈΠ΅ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΡΡ ΡΠ΅ΡΠ΅Π²ΡΡ ΡΡΠ΅Π½Π°ΠΆΠ΅ΡΠ½ΡΡ ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ² Π½Π° Π²ΠΎΠ·Π΄ΡΡΠ½ΠΎΠΌ ΡΡΠ°Π½ΡΠΏΠΎΡΡΠ΅ Ρ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ Π½Π΅ΡΠ΅ΡΠΊΠΈΡ ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΈ ΠΏΠΎΠΌΠ΅Ρ ΠΎΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΠ³ΠΎ ΠΊΠΎΠ΄ΠΈΡΠΎΠ²Π°Π½ΠΈΡ
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.Π Π΄Π°Π½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΠ΅ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ Π°Π½Π°Π»ΠΈΠ· Π·Π°ΡΡΠ±Π΅ΠΆΠ½ΠΎΠ³ΠΎ ΠΎΠΏΡΡΠ° ΠΈ ΡΠ΄Π΅Π»Π°Π½ Π²ΡΠ²ΠΎΠ΄, ΡΡΠΎ ΠΎΠ΄ΠΈΠ½ ΠΈΠ· ΠΏΡΡΠ΅ΠΉ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΎΠ±Π΅ΡΠΏΠ΅ΡΠ΅Π½ΠΈΡ Π°Π²ΠΈΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ Π±Π΅Π·ΠΎΠΏΠ°ΡΠ½ΠΎΡΡΠΈ Π² Π ΠΎΡΡΠΈΠΉΡΠΊΠΎΠΉ Π€Π΅Π΄Π΅ΡΠ°ΡΠΈΠΈ Π·Π°ΠΊΠ»ΡΡΠ°Π΅ΡΡΡ Π² ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠΈ ΡΠΎΠ²ΡΠ΅ΠΌΠ΅Π½Π½ΡΡ
ΡΠ΅ΡΠ΅Π²ΡΡ
ΡΡΠ΅Π½Π°ΠΆΠ΅ΡΠ½ΡΡ
ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ². ΠΡΠ΅Π΄Π»ΠΎΠΆΠ΅Π½ ΠΈ Π°ΠΏΡΠΎΠ±ΠΈΡΠΎΠ²Π°Π½ Π½ΠΎΠ²ΡΠΉ ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ ΠΊ ΠΎΡΠ΅Π½ΠΊΠ΅ ΡΡΠΎΠ²Π½Ρ ΠΊΠΎΠΌΠΏΠ΅ΡΠ΅Π½ΡΠ½ΠΎΡΡΠΈ ΠΎΠΏΠ΅ΡΠ°ΡΠΎΡΠΎΠ² Π΄ΠΎΡΠΌΠΎΡΡΠ°, ΠΏΠΎΠ·Π²ΠΎΠ»ΡΡΡΠΈΠΉ ΡΡΠΈΡΡΠ²Π°ΡΡ ΠΏΠ°ΡΠ°ΠΌΠ΅ΡΡΡ Π³Π»Π°Π·ΠΎΠ΄Π²ΠΈΠ³Π°ΡΠ΅Π»ΡΠ½ΠΎΠΉ Π΄Π΅ΡΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ ΠΈ Π²Π°ΡΠΈΠ°Π±Π΅Π»ΡΠ½ΠΎΡΡΠΈ ΡΠ΅ΡΠ΄Π΅ΡΠ½ΠΎΠ³ΠΎ ΡΠΈΡΠΌΠ° ΠΈΡΠΏΡΡΡΠ΅ΠΌΡΡ
ΠΎΠΏΠ΅ΡΠ°ΡΠΎΡΠΎΠ², ΠΎΡΠ»ΠΈΡΠ°ΡΡΠΈΠΉΡΡ ΠΎΡ ΡΡΡΠ΅ΡΡΠ²ΡΡΡΠΈΡ
ΠΏΠΎΠ΄Ρ
ΠΎΠ΄ΠΎΠ² ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ Π½Π΅ΡΠ΅ΡΠΊΠΈΡ
ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΊΠ»Π°ΡΡΠΈΡΠΈΠΊΠ°ΡΠΈΠΈ. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ Π°ΠΏΠΏΠ°ΡΠ°ΡΡΡΠ½ΡΡ
ΡΡΠ΅Π΄ΡΡΠ² ΠΏΡΠΈΡ
ΠΎΡΠΈΠ·ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΠΌΠΎΠ½ΠΈΡΠΎΡΠΈΠ½Π³Π° ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡ Eye tracking ΠΈ ΡΡΡΡΠΎΠΉΡΡΠ²ΠΎ ΠΏΡΠΈΡ
ΠΎΡΠΈΠ·ΠΈΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ΅ΡΡΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π£ΠΠ€Π’-1/30 Β«ΠΡΠΈΡ
ΠΎΡΠΈΠ·ΠΈΠΎΠ»ΠΎΠ³Β». ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Ρ ΠΎΡΠ½ΠΎΠ²Ρ Π°Π²ΡΠΎΠΌΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ Π³Π΅Π½Π΅ΡΠ°ΡΠΈΠΈ Π½Π΅ΡΠ΅ΡΠΊΠΈΡ
ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΡΠΈΠΏΠ° Π‘ΡΠ³Π΅Π½ΠΎ ΠΈ ΠΠ°ΠΌΠ΄Π°Π½ΠΈ ΠΈΠ· ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΡ
Π΄Π°Π½Π½ΡΡ
. ΠΡΠΎΠ²Π΅Π΄Π΅Π½Ρ ΡΠΊΡΠΏΠ΅ΡΠΈΠΌΠ΅Π½ΡΠ°Π»ΡΠ½ΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π½Π° Π±Π°Π·Π΅ Π€ΠΠΠΠ£ ΠΠ Π£Π ΠΠ. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ ΡΡΠ°Π²Π½Π΅Π½ΠΈΡ ΡΠ³Π΅Π½Π΅ΡΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ ΠΏΠΎΠΊΠ°Π·Π°Π»ΠΈ, ΡΡΠΎ ΠΌΠΎΠ΄Π΅Π»Ρ Π‘ΡΠ³Π΅Π½ΠΎ, ΠΎΠ±ΡΡΠ΅Π½Π½Π°Ρ Ρ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ ANFIS-Π°Π»Π³ΠΎΡΠΈΡΠΌΠ°, ΡΠΎΡΠ½Π΅Π΅, ΡΠ΅ΠΌ ΠΌΠΎΠ΄Π΅Π»Ρ ΠΠ°ΠΌΠ΄Π°Π½ΠΈ ΠΈ ΠΌΠΎΠ΄Π΅Π»Ρ Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎΠΉ ΡΠ΅Π³ΡΠ΅ΡΡΠΈΠΈ, ΠΈΠ΄Π΅Π½ΡΠΈΡΠΈΡΠΈΡΡΠ΅Ρ ΠΈΡΡΠ»Π΅Π΄ΡΠ΅ΠΌΡΡ Π·Π°Π²ΠΈΡΠΈΠΌΠΎΡΡΡ ΠΏΠΎ ΠΎΡΠ΅Π½ΠΊΠ΅ ΠΊΠΎΠΌΠΏΠ΅ΡΠ΅Π½ΡΠ½ΠΎΡΡΠΈ ΠΎΠΏΠ΅ΡΠ°ΡΠΎΡΠΎΠ² Π΄ΠΎΡΠΌΠΎΡΡΠ°. Π ΠΊΠ°ΡΠ΅ΡΡΠ²Π΅ ΠΊΡΠΈΡΠ΅ΡΠΈΡ ΠΊΠ°ΡΠ΅ΡΡΠ²Π° ΠΌΠΎΠ΄Π΅Π»Π΅ΠΉ Π½Π° ΠΎΠ±ΡΡΠ°ΡΡΠΈΡ
ΠΈ ΡΠ΅ΡΡΠΎΠ²ΡΡ
Π΄Π°Π½Π½ΡΡ
ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Π° ΡΡΠ΅Π΄Π½ΡΡ ΠΊΠ²Π°Π΄ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠ°Ρ ΠΎΡΠΈΠ±ΠΊΠ°. ΠΠ±ΠΎΡΠ½ΠΎΠ²Π°Π½Π° Π°ΠΊΡΡΠ°Π»ΡΠ½Π°Ρ Π·Π°Π΄Π°ΡΠ° Π²ΡΠ±ΠΎΡΠ° ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠΉ ΠΊΠΎΠ½ΡΠ΅ΠΏΡΠΈΠΈ ΠΏΠΎΠΌΠ΅Ρ
ΠΎΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΠ³ΠΎ ΠΊΠΎΠ΄ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π² ΡΠ΅Π»Π΅ΠΊΠΎΠΌΠΌΡΠ½ΠΈΠΊΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠΎΡΡΠ°Π²Π»ΡΡΡΠ΅ΠΉ ΠΏΠ΅ΡΡΠΏΠ΅ΠΊΡΠΈΠ²Π½ΡΡ
ΡΡΠ΅Π½Π°ΠΆΠ΅ΡΠ½ΡΡ
ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠΎΠ². ΠΠΏΠΈΡΠ°Π½Ρ ΠΏΡΡΠΈ ΡΠ΅ΡΠ΅Π½ΠΈΡ Π²Π°ΠΆΠ½ΠΎΠΉ Π·Π°Π΄Π°ΡΠΈ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΡ Π΄ΠΎΡΡΠΎΠ²Π΅ΡΠ½ΠΎΡΡΠΈ Π°ΠΊΡΡΠ°Π»ΡΠ½ΡΡ
ΡΠΈΡΡΠΎΠ²ΡΡ
Π΄Π°Π½Π½ΡΡ
Π² ΡΠ΅ΡΠ΅Π²ΡΡ
ΡΡΠ΅Π½Π°ΠΆΠ΅ΡΠ½ΡΡ
ΠΊΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ°Ρ
Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΡΠ΅Π΄ΡΡΠ² ΠΏΠΎΠΌΠ΅Ρ
ΠΎΡΡΡΠΎΠΉΡΠΈΠ²ΠΎΠ³ΠΎ ΠΊΠΎΠ΄ΠΈΡΠΎΠ²Π°Π½ΠΈΡ. ΠΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½Π° ΠΌΠΎΠ΄Π΅Π»Ρ ΠΏΠ΅ΡΠ΅ΡΡΠ°Π½ΠΎΠ²ΠΎΡΠ½ΠΎΠ³ΠΎ Π΄Π΅ΠΊΠΎΠ΄Π΅ΡΠ° Π½Π΅Π΄Π²ΠΎΠΈΡΠ½ΠΎΠ³ΠΎ ΠΈΠ·Π±ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠ΄Π° Π½Π° Π±Π°Π·Π΅ Π»Π΅ΠΊΡΠΈΠΊΠΎΠ³ΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΎΠΉ ΠΊΠΎΠ³Π½ΠΈΡΠΈΠ²Π½ΠΎΠΉ ΠΊΠ°ΡΡΡ. ΠΠ°Π½Π½Π°Ρ ΠΌΠΎΠ΄Π΅Π»Ρ Π΄Π΅ΠΊΠΎΠ΄Π΅ΡΠ° ΠΈΠ·Π±ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΠΊΠΎΠ΄Π° ΠΈΡΠΏΠΎΠ»ΡΠ·ΡΠ΅Ρ ΠΌΠ΅ΡΠΎΠ΄Ρ ΠΊΠΎΠ³Π½ΠΈΡΠΈΠ²Π½ΠΎΠΉ ΠΎΠ±ΡΠ°Π±ΠΎΡΠΊΠΈ Π΄Π°Π½Π½ΡΡ
ΠΏΡΠΈ ΡΠ΅Π°Π»ΠΈΠ·Π°ΡΠΈΠΈ ΠΏΡΠΎΡΠ΅Π΄ΡΡΡ ΠΏΠ΅ΡΠ΅ΡΡΠ°Π½ΠΎΠ²ΠΎΡΠ½ΠΎΠ³ΠΎ Π΄Π΅ΠΊΠΎΠ΄ΠΈΡΠΎΠ²Π°Π½ΠΈΡ Π΄Π»Ρ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠΉ Π·Π°ΡΠΈΡΡ ΠΊΠΎΠΌΠ°Π½Π΄ Π΄ΠΈΡΡΠ°Π½ΡΠΈΠΎΠ½Π½ΠΎΠ³ΠΎ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΎΡ Π²Π»ΠΈΡΠ½ΠΈΡ Π΄Π΅ΡΡΡΡΠΊΡΠΈΠ²Π½ΡΡ
ΡΠ°ΠΊΡΠΎΡΠΎΠ² Π½Π° ΠΏΡΠΎΡΠ΅ΡΡ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ
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 2020β2021. 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 (18.4β18.8%) and gluten (35.9β36.0%) 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 5.5Γ10.3Γ4.6 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 Β°C (at an ambient temperature of +55 Β°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 Β°C, the temperature on the microprocessor chip did not exceed +84 Β°C (a difference of 3 Β°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 Braggβs 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 characteristicsΠΠ΅Π»Π³ΠΎΡΠΎΠ΄ΡΠΊΠΈΠΉ Π³ΠΎΡΡΠ΄Π°ΡΡΡΠ²Π΅Π½Π½ΡΠΉ ΡΠ½ΠΈΠ²Π΅ΡΡΠΈΡΠ΅