Doklady of the National Academy of Sciences of Belarus最新文献

{"title":"Internationalization of higher education: socio-philosophical aspect","authors":"D. Smaliakou","doi":"10.29235/1561-8323-2020-64-3-371-378","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-3-371-378","url":null,"abstract":"Internationalization is one of the most important trends in modern higher education which requires philosophical reflection. The emergence of internationalization is associated with replacing the international influence by international integration. Integration is realized through the convergence of the quality of higher education, which provides the benefits of international participation for different stakeholders operating in various modes of higher education. Accelerating integration processes internationalization is determined by the development of integration processes: there are leaders and outsiders of internationalization. The future of internationalization largely depends on the adaptation of higher education to global development disbalances.","PeriodicalId":11283,"journal":{"name":"Doklady of the National Academy of Sciences of Belarus","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89861173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Features of rock pressure manifestations with the slice pillarless extraction of the Third potash layer at the Starobin potash salt deposit","authors":"A. Petrovsky, V. Y. Prushak, E. Lutovich","doi":"10.29235/1561-8323-2020-64-3-350-360","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-3-350-360","url":null,"abstract":"Rock pressure manifestations in the development workings and the bottomhole region of the lower longwalls with the slice pillarless extraction of the Third potash layer of the Starobin potash salt deposit were studied. The stability of the development workings and the bottomhole space of the longwalls and the nature of interaction of the bottomhole lining with the adjoining rocks were studied. The intensity of manifestations of rock pressure in the longwalls and the nature of roof subsidence of the bottomhole region and its fall behind the face support were assessed. The nature of the loading speed distribution of the bottomhole lining for the treatment cycle was clarified. The rate of change of the loading before the heading and during this process and the loading rate of the bottomhole lining are taken as the main load support indicators for the treatment cycle. The cyclical nature of the change in the magnitude of these indicators in the interval of 10–12 treatment cycles is revealed. Their dependence on elastic stresses and creep of roof rocks after the formation of a new face is shown. The presence of the dynamic component of the load of the bottomhole lining due to the factor of the speed of the bottomhole movement was established. The influence of the deformation of rocks in the troughs of displacement on the bottomhole lining has been established. At the same time, it is shown that over a time interval of more than 2 years, the intensity of deformation of the rocks is significantly reduced. The possibility is shown how to determine the mean spacing of the secondary rock subsidence of the main roof and to identify anomalies associated with the boundaries of tectonic dislocations, faults and subsidence troughs by analyzing the dynamics of the accumulated deviations from the average of load support indicators. Recommendations have been developed on rational and safe parameters for maintaining the bottomhole region and the development workings of the lower longwalls with the slice pillarless extraction of the Third potash layer.","PeriodicalId":11283,"journal":{"name":"Doklady of the National Academy of Sciences of Belarus","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82379291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polymer gels for the protection of coniferous root systems from desiccation","authors":"V. Kopytkov","doi":"10.29235/1561-8323-2020-64-3-379-384","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-3-379-384","url":null,"abstract":"The results of the development of composite polymer materials for processing root systems of seedlings in order to increase the survival rate of forest crops are presented. It has been established that the type of target additives and the concentration of water-soluble polymers in the compositions for processing can significantly affect the physicochemical properties of the composites and moisture loss by root systems of seedlings. The optimal compositions of composite polymer materials for protecting the root systems of a number of conifers from drying out are given.","PeriodicalId":11283,"journal":{"name":"Doklady of the National Academy of Sciences of Belarus","volume":"111 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86877938","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electrical properties of iron powder-based composites encapsulated by the oxide coating","authors":"A. Vetcher, A. Galyas, G. Govor, K. Yanushkevich","doi":"10.29235/1561-8323-2020-64-2-233-237","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-2-233-237","url":null,"abstract":"The electrical characteristics of composite materials based on iron powders ASC 100.29 (Sweden) were investigated. The surface of powders is encapsulated by an insulating ferrite coating. The conductivity and the thermopower were studied, the cores were made by the pressing method, and then the samples were cut from the cores. The results show that the decrease in the electrical resistance with increasing temperature is due to a change in the contact between the grains in the sample. A change in the boundaries between grains (or domains) creates the conditions for formation of a new magnon, which affects the thermopower coefficient value. The research results can be used in the synthesis of composites with specified electromagnetic characteristics for practical applications.","PeriodicalId":11283,"journal":{"name":"Doklady of the National Academy of Sciences of Belarus","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88046150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the intralinear polymorphism and the homozygosity rate of triticale doubled haploid lines by microsatellite markers","authors":"В. Лагуновская, А. А. Буракова, Н. Буштевич, И. Сакович, В. А. Лемеш, И. Гриб, A. V. Lagunovskaya, Aryna А. Buracova, V. N. Bushtevich, V. Sakovich, Valiantsina A. Lemesh, Academician Stanislau I. Gryb","doi":"10.29235/1561-8323-2020-64-2-199-208","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-2-199-208","url":null,"abstract":"We evaluated the rate of polymorphism of doubled haploid lines of hexaploid triticale obtained by the method of anther culture based on hybrids of spring and winter types. Using 7 SSR markers for the loci on the chromosomes A- (Xgwm186, Xgwm291, Xgwm595) and B- (Xgwm371, Xgwm540, Xgwm554, Xgwm234), polymorphism of 38 doubled haploid lines of hexaploid triticale was studied. Interlinear polymorphism along six microsatellite loci except the Xgwm554 locus, which is not polymorphic in the studied doubled haploid lines, was revealed. The highest polymorphism was observed for the Xgwm186, Xgwm291 and Xgwm595 loci. The cluster analysis showed that all studied lines were divided into three main groups. The origin of the lines did not affect the distribution in groups. This confirms the influence of in vitro culture somaclonal variation. Eight lines of doubled haploids, which are heterozygous for one of the studied microsatellite loci, were identified. We showed the possibility of using SSR markers to assess interlinear polymorphism and the homozygosity rate in the triticale doubled haploid lines obtained by the method of induced androgenesis in vitro.","PeriodicalId":11283,"journal":{"name":"Doklady of the National Academy of Sciences of Belarus","volume":"120 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73566667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-pot synthesis of cyclic β-dicarbonyl compounds as synthons for 11-deoxyprostanoids","authors":"F. S. Pashkovsky, Yu. S. Dontsu, D. I. Korneev, D. B. Rubinov, F. A. Lakhvich","doi":"10.29235/1561-8323-2020-64-2-186-192","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-2-186-192","url":null,"abstract":"One-pot synthesis of cyclic β-dicarbonyl synthons for 11-deoxyprostanoids has been developed on the basis of cyclopentane-1,3-dione and 5-phenyl tetronic acid. The obtained 2-alkyl(arylalkyl)-substituted cyclopentane-1,3-diones have been transformed into cyclopentenone precursors of 11-deoxy-PGE 1 and 11-deoxy-PGE 2 analogues.","PeriodicalId":11283,"journal":{"name":"Doklady of the National Academy of Sciences of Belarus","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88559527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular mechanisms of high-affinity interaction of the protein tBid with the mitochondrial complex МТСН2-МОАР-1","authors":"H. V. Dudko, V. Urban, V. Veresov","doi":"10.29235/1561-8323-2020-64-2-193-198","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-2-193-198","url":null,"abstract":"Mitochondrial carrier homolog 2 (MTCH2) is a protein that plays an important role in the execution of apoptosis being a receptor for tBid in the outer membrane of mitochondria. Previously, it has been shown that the binding of the modulator of apoptosis-1 (MOAP-1) protein to MTCH2 is required for the efficient MTCH2-mediated recruitment of tBid to mitochondria and, in contrast, tBid is required for the MOAP-1 recruitment to mitochondria, but the structure understanding of these phenomena is absent. In this study, we have provided structural insights into the mechanisms of regulation of the MTCH2 receptor function for tBid by MOAP-1.","PeriodicalId":11283,"journal":{"name":"Doklady of the National Academy of Sciences of Belarus","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89499033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Object tracking algorithm by moving video camera","authors":"B. Zalesky","doi":"10.29235/1561-8323-2020-64-2-144-149","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-2-144-149","url":null,"abstract":"The algorithm ACT (Adaptive Color Tracker) to track objects by a moving video camera is presented. One of the features of the algorithm is the adaptation of the feature set of the tracked object to the background of the current frame. At each step, the algorithm extracts from the object features those that are more specific to the object and at the same time are at least specific to the current frame background, since the rest of the object features not only do not contribute to the separation of the tracked object from the background, but also impede its correct detection. The features of the object and background are formed based on the color representations of scenes. They can be computed in two ways. The first way is 3D-color vectors of the clustered image of the object and the background by a fast version of the well-known k-means algorithm. The second way consists in simpler and faster partitioning of the RGB-color space into 3D-parallelepipeds and subsequent replacement of the color of each pixel with the average value of all colors belonging to the same parallelepiped as the pixel color. Another specificity of the algorithm is its simplicity, which allows it to be used on small mobile computers, such as the Jetson TXT1 or TXT2.The algorithm was tested on video sequences captured by various camcorders, as well as by using the well-known TV77 data set, containing 77 different tagged video sequences. The tests have shown the efficiency of the algorithm. On the test images, its accuracy and speed overcome the characteristics of the trackers implemented in the computer vision library OpenCV 4.1.","PeriodicalId":11283,"journal":{"name":"Doklady of the National Academy of Sciences of Belarus","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80785522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural-phase junctions in the system of Pt–Si during rapid thermal treatment","authors":"U. Pilipenka, F. Komarov, V. Saladukha, V. A. Harushka","doi":"10.29235/1561-8323-2020-64-2-238-244","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-2-238-244","url":null,"abstract":"In recent years the interest to silicides significantly rose relating to their huge potentialities as the material of the low-Ohm contacts and interconnections of metallization of the silicon integrated circuits. In view of this the necessity appeared to consider more extensively the thermal dynamic, electric and structural peculiarities of their formation. Purpose of the work was in investigation of influence of the rapid thermal treatment on the structural –phase junctions in the system of Pt–Si during formation of platinum silicide. As samples, the Pt films were used, 43.7 nm thick and applied on the substrates of the mono-crystal silicon KEF КЭФ 0.5 with orientation (111) by means of the magnetron sputtering of the platinum target with purity of 99.95 % on the unit MRS 603 with the cryogenic pumping to the pressure not worse, than 5 · 10–5 Pa. As the operating medium, argon was used, whose purity constituted 99.933 %. Rapid thermal treatment was performed in the nitrogen medium within the temperature range from 200 to 550 °С with a step of 50 °С and the time period of 7 s. The process of interaction of platinum with silicon during treatment of the Pt–Si system was evaluated by means of the analysis of the RBS spectra. It is demonstrated, that within the temperature range of 200 °С ≤ Т ≤ 300 °С during 7 s of the rapid thermal process on the boundary of the metal film with the substrate, formation takes place of the Pt2Si layer owing to diffusion of the Pt atoms into silicon via the layer of the growing silicide. The temperature Т = 300 °С is peculiar for the complete application of the Pt film during 7 s in process of the silicide formation of the single phase system of Pt2Si. At 350 °С ≤ Т < 450 °С formation is registered of the double phase system of Pt2Si → PtSi, starting from the inter-phase boundary of Si/Pt2Si predominantly owing to the opposite diffusion of the Si atoms into the layer of Pt2Si. The temperature of the rapid thermal treatment Т = 450 °С marks formation of the thermally stable balanced structure of PtSi along the entire silicide thickness, which is 50–100 °С lower and considerably more rapid, than during the long-term balanced thermal treatment.","PeriodicalId":11283,"journal":{"name":"Doklady of the National Academy of Sciences of Belarus","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91388368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strengthening of poly (ethylene terephthalate) by filling with short glass fibers and multi-wall carbon nanotubes","authors":"S. Pesetskii, V. V. Dubrovsky, O. Makarenko","doi":"10.29235/1561-8323-2020-64-1-103-110","DOIUrl":"https://doi.org/10.29235/1561-8323-2020-64-1-103-110","url":null,"abstract":"The effect of hybrid filling of poly (ethylene terephthalate) (PET) with short glass fibers (GF) and multi-walled carbon nanotubes (MWCNTs) on the static and dynamic mechanical properties of composites, as well as the structural features and rheological behavior of melts were investigated. Compounding materials was carried out by the PET melt blending with the use of the reaction extrusion method. The studied composites contained from 15 to 60 wt. % GF, the concentration of MWCNTs was 0.5 and 1.6 wt. %. It was shown that the PET hybrid filling led to a synergistic increase in the strength, the elastic modulus and the dynamic shear modulus of composites under tension and bending in a wide temperature range. MWCNT additives intensified interfacial adhesion, had a nucleating effect on the crystallization of the binder, and increased its thermal stability.","PeriodicalId":11283,"journal":{"name":"Doklady of the National Academy of Sciences of Belarus","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72973088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}