Browsing Внеуниверситетские публикации ученых БНТУ by Title

Now showing items 105-124 of 4309

    • Interdisciplinary integration idea in education of managers 

      Sorokina, A. I. (БГУИР, 2016)
      The development of industry, economic growth, and intensification of investment and innovation processes - all these issues can be solved effectively only by competent managers understanding modern market relations and business process management. This is a guarantee of the country's competitiveness and its economic security. Therefore, one of the priorities of the state policy ...
      2022-10-24

    • Internal scheme of the body assessment in an experiment with environmental uncertainty 

      Lukashevich, U. A.; Vasuk, V. E.; Tarasevich, M. I.; Mankevich, S. M.; Paramonova, N. A. (2017)
      The aim of the work was to analyze the influence of various environmental factors forming environmental uncertainty on the nature of the transformation of the "internal scheme of the body". Materials and methods. For the study, a group of healthy volunteers (n = 90) was selected. The results in this paper are median, 75 and 25 percentiles (Me [UQ / LQ]). The study was conducted ...
      2022-08-29

    • International higher education cooperation under conditions of fuzzy terminology: intellectual mobility vector 

      Mannanov, U. V.; Gancherenok, I. I. (2030 Uzbekistan Research Online, 2020)
      Terminology analysis of higher education internationalization process concerning joint educational programs is fulfilled. Fuzziness of used terminology is demonstrated. Joint higher education establishments development in the framework of fractal model is suggested as a strategic direction of higher education internationalization, enhancement of its quality and a concept of ...
      2020-07-17

    • Investigations of Chl α aggregates cross-linked by dioxane in 3-methylpentane 

      Oksanen, J. A. I.; Zenkevich, E. I.; Knyukshto, V. N.; Pakalnis, S.; Hynninen, P. H.; Korrpi-Tommola, J. E. I. (1997)
      In this work, dioxane-bound aggregates of chlorophyll a are prepared in 3-methylpentane. The properties of the aggregates are studied by using steady-state and time-resolved spectroscopies. The Qy-region absorption spectrum of the chlorophyll α-dioxane aggregate shows four clearly resolvable narrow bands with comparable intensities. The band maxima are located at 683, 689, 698 ...
      2017-05-25

    • The issues of ensuring regional economic security in the conditions of formation of innovative economy in the Customs Union of Belarus, Kazakhstan and Russia 

      Brovka, G. M. (BW Jan Brodzinski, 2014)
      One of the features of the integration of transformations in the post-Soviet space is not only a different speed of their implementation, but also the gradual achievement of the maximum use of regional integration association of a higher level under the existing mechanisms of a lower stage of integration. The driving force behind the ongoing transformation is to ensure the economic ...
      2019-04-05

    • Kelvin probe error compensation based on harmonic analysis of measurement signal 

      Tyavlovsky, A. K.; Zharin, A. L.; Gusev, O. K.; Kierczynski, K. (2014)
      Kelvin probe error compensation based on harmonic analysis of measurement signal / A. K. Tyavlovsky [et al.] // Przeglad Elektrotechniczny. – 2014. – Vol. 90, № 3. – P. 251-254.
      2015-07-06

    • Laboratory Investigation of Load Incremental Effect on the Deformation of Clay Under Axially Loaded Modeled Circular Piles 

      Adejumo, T. W.; Alhassan, M.; Boiko, I. L. (2013)
      This paper presents the results of recent experimental investigation of load incremental effect on the deformation of clay under axially loaded modeled wooden circular piles in clay. The modeled piles consist of 20 mm diameter, 200 mm length, made up of single pile, 4 No pile group of 2x2 with centre to centre a = 4d, and 9 No pile group of 3x3 with centre to centre a = 3d, were ...
      2018-03-10

    • Laser confocal and spatially-resolved fluorescence spectroscopy of porphyrin distribution on plasma deposited polymer films 

      Zenkevich, E. I.; Martin, J.; Borczyskowski, C. von; Ageeva, T. A.; Titov, V. A.; Knyukshto, V. N. (2008)
      Laser confocal microscopy and spatially-resolved fluorescence spectroscopy have been used for the study of the interaction of di(p-aminophenyl)etioporphyrin (DAPEP) and tetra(p-aminophenyl)porphyrin (TAPP) molecules with the surface of thin (7-15 μm) polypropylene films treated by 0.5 M KCl solution and activated by air non-equilibrium plasma at the normal atmospheric pressure. ...
      2017-05-27

    • Laser Performance of Er,Yb:YAl3(BO3)4 Crystals with Different Erbium Concentrations 

      Gorbachenya, K. N.; Kisel, V. E.; Yasukevich, A. S.; Maltsev, V. V.; Leonyuk, N. I.; Kuleshov, N. V. (2014)
      The effect of erbium concentration on the laser performance of Er,Yb:YAl3(BO3)4 crystals was investigated. A maximal output power of 1.6 W in CW and 2.7 W in QCW regimes was obtained at 1522 nm.
      2017-11-22

    • Laser performance of in-band pumped Er : LiYF4 and Er : LiLuF4 crystals 

      Gorbachenya, K. N.; Kurilchik, S. V.; Kisel, V. E.; Yasukevich, A. S.; Kuleshov, N. V.; Nizamutdinov, A. S.; Korableva, S. L.; Semashko, V. V. (Turpion Ltd., 2016)
      Spectroscopic properties of Er : LiLuF4 and Er : LiYF4 crystals in the spectral region near 1.5 mm and the lasing characteristics of these crystals under in-band pumping at a wavelength of 1522 nm are studied. With the Er : LiLuF4 crystal, the maximum slope efficiency with respect to the absorbed pump power was 44 % at a wavelength of 1609 nm. Continuous-wave operation of an ...
      2016-03-29

    • Life cycle assessment of biomass production from drained wetlands areas for composite briquettes fabrication 

      Rodzkin, A. I.; Kundas, S. P.; Wichtmann, W. (2017)
      The area of wetlands after peat mining in Belarus is about 190,000 hectares and once peat harvesting has ceased it is impossible to grow any cultural plants for some years. One of the perspective directions is rewetting wetlands after peat extraction that stimulate vegetation of natural grass, like reed, rush and others which are growing in natural conditions. The grass biomass ...
      2021-07-19

    • Ligand dynamics and temperature effects upon formation of nanocomposites based on semiconductor CdSе/ZnS quantum dots and porphyrins: ensemble and single object measurements 

      Zenkevich, E. I.; Blaudeck, T.; Kowerko, D.; Stupak, A. P.; Cichos, F.; Borczyskowski, C. von (2012)
      Dye molecules with pyridyl side substituents (porphyrins and heterocyclic perylene diimides) coordinatively attached to semiconductor CdSe/ZnS quantum dots (QDs) surface form quasi-stable “QD-Dye” nanocomposites of various geometry in the competition with capping molecules (tri-n-octyl phosphine oxide or long chain amines) exchange. This results in photoluminescence (PL) quenching ...
      2017-05-27

    • Light-absorption selection of nanoparticles and nanofluids containing nanoparticles for their effective heating by solar radiation 

      Pustovalov, V. K.; Astafyeva, L.G.; Fritzsche, W. (Springer, 2017)
      Light-absorption selection of single nanoparticle for solar radiation requires the simultaneous fulfillment of all of the following novel conditions—maximal close (overlap) of the dependence of nanoparticle efficiency absorption factor on wavelength with the dependence solar irradiance, predominant role of nanoparticle absorption over its scattering, the use of maximal values of ...
      2023-05-10

    • Limit state design of slender steel webs associated with the shear buckling 

      Martynov, Y. S.; Nadolski, V. V. (2016)
      The interaction of some cases ultimate limit state with the serviceability limit states is established. Thereby the single and multiple local buckling of the web are considered as serviceability limit state for checking shear resistance according to Euro code 3 «Design of steel structures». The method for checking shear resistance with the aforementioned serviceability limit state ...
      2021-02-10

    • Linguistic and acoustic resources of the computer system of spoken english intonation training 

      Zdaranok, Y. A. (БГУИР, 2017)
      This paper considers supra-segmental parameters as intonation, stress and speech rhythm, which are related not only to the correct articulation of sounds of the target language, but the correct pronunciation depends on prosodic structures presented by a standard intonation patterns. Linguistic and acoustic resources are needed for computer-aided intonation training because they ...
      2022-08-15

    • Linguistic and acoustic resources of the computer-based system for analysis and interpretation of speech intonation 

      Zdaranok, Y. A. (Ульяновский ГТУ, 2017)
      This paper considers suprasegmental parameters such as intonation, stress and speech rhythm. Correct articulation of sounds and correct pronunciation in the target language depend on prosodic structures presented by standard intonation patterns. Linguistic and acoustic resources provide the basis for computer-aided intonation training in and outside the classroom. There is a great ...
      2021-06-28

    • Low-power gas sensor on nanostructured dielectric membrane 

      Belahurov, E. A.; Khatko, V. V.; Gorokh, G. G.; Zakhlebayeva, A. I.; Reutskaya, O. G.; Taratyn, I. A. (Новые технологии, 2015)
      The article presents a technology for manufacture of a gas sensor with a two-layer nanostructured dielectric membrane on a silicon substrate and its characteristics. Selection of the correct mathematical model ensures a good correlation between the experimental and calculated current-voltage characteristics of the sensor and makes it possible to evaluate the effect of porosity ...
      2018-07-06

    • Luminescence of oxyfluoride glasses containing YB3+–RE3+ ions 

      Loiko, P. A.; Rachkovskaya, G. E.; Zakharevich, G. B.; Skoptsov, N. A.; Yumashev, K. V. (2016)
      The optical absorption and up-conversion luminescence of oxyfluoride glasses in the system SiO2–PbO–PbF2–CdF2 coactivated by Yb3+–RE3+ ions (where RE = Er, Tm, Ho, Dy, Pr, or Tb) are investigated. Excitation with a laser diode in the IR range (960 nm) gives intense green, blue, and red luminescence. The color characteristics of the up-conversion luminescence in the CIE 1931 system ...
      2017-11-22

    • Manifestation of nonplanarity effects and charge-transfer interactions in spectral and kinetic properties of triplet states of sterically strained octaethylporphyrins 

      Knyukshto, V. N.; Sagun, E. I.; Shulga, A. M.; Starukhin, D. A.; Bachilo, S. M.; Zenkevich, E. I. (2001)
      Properties of the triplet states of octaethylporphyrins with the steric hindrance (free bases and Pd complexes) are studied by the methods of stationary and kinetic spectroscopy in the temperature range from 77 to 293 K. The mono-mesophenyl substitution results in a decrease in the quantum yield and shortening of the phosphorescence lifetime of Pd complexes by 250–3500 times in ...
      2017-05-26

    • Method of comprehensive surface hardening of steel products 

      Kovalchuk, A. V.; Konstantinov, S. V.; Bogdanchik, M. I. (ВГУ имени П. М. Машерова, 2014)
      В статье рассмотрен метод комплексного поверхностного упрочнения изделий из стали.
      2015-03-25