Browsing Внеуниверситетские публикации ученых БНТУ by Title

Now showing items 193-212 of 4309

    • Teaching business english on the basis of case-study method 

      Sologub, I. M. (БГУИР, 2016)
      This article describes case-study method as a teaching method that uses simulation as a means aimed at the formation of students‘ professional skills. It enables to interest students in studying the subject as well as to collect, process and analyze the information which has been studied. It also shows how case-study method can be used in teaching Business English.
      2022-10-24

    • Teaching of professionally oriented dialogic communication for future economists 

      Pavlyuchenka, I. M. (БГУИР, 2016)
      The present article covers the main methods, used while teaching dialogic communication for future economists. The most functional methods for dialogic teaching are considered. The arguments proving the efficiency of these methods are given.
      2022-10-24

    • Temperature and combustion kinetics of wood pellet char in a fluidized bed 

      Palchonok, G. I.; Borodulya, A.; Golubeva, V.; Leckner, B.; Hansson, K.-M.; Tullin, C.; Johnsson, J. E. (ИТМО имени А. В. Лыкова, 2000)
      Temperature and combustion kinetics of wood pellet char in a fluidized bed / G. I. Palchonok [et al.] // Тепломассообмен. ММФ―2000 : IV Минский международный форум, Минск, 22―26 мая 2000 г. : в 11 т. / Национальная академия наук Беларуси, Институт тепло- и массообмена им. А. В. Лыкова ; редкол.: В. А. Бородуля [и др.]. – Минск : ИТМО имени А. В. Лыкова, 2000. - Т. 6 : Тепломассообмен ...
      2020-11-12

    • Temperature dependence of green upconversion fluorescence of fluorophosphate and tellurite-barium glasses for application in temperature sensors 

      Varaksa, Y.; Sinitsyn, G.; Khodasevich, М. А.; Yasukevich, A. S.; Demesh, M. P.; Aseev, V. (Издательский центр БГУ, 2015)
      Temperature dependences are studied of green upconversion fluorescence of the five erbium- and ytterbium-doped glasses (three fluorophosphate glasses, one of which is additionally doped with Tm, and two tellurite-baruim ones) in the temperature range from 30°C to 150°C. The ratio of intensities is determined of two fluorescence bands at about 515-525 nm and 540-560 nm versus the ...
      2021-06-12

    • Temperature dependent steric hindrance effects in triplet state relaxation of meso-phenyl-substituted Pd-octaethylporphyrins 

      Gorski, A.; Knyukshto, V.; Zenkevich, E.; Starukhin, A.; Kijak, M.; Solarski, J.; Semeikin, A.; Lyubimova, T. (Elsevier, 2018)
      The analysis of spectral-kinetic results of transient absorption and phosphorescence experiments has been carried out in a wide temperature range (80-293K) for a series of Pd-octaethylporphyrin derivatives (PdOEP) with increasing number of bulky meso-phenyl substituents. In order to elucidate the influence of steric hindrance interactions, as well as porphyrin macrocycle non-planarity ...
      2018-09-14

    • Temporal energy transfer in single nanoassemblies "Quantum dot - dye molecule" 

      Zenkevich, E. I.; Gerlach, F.; Borczyskowski, C. von (РИВШ, 2017)
      Zenkevich, E. I. Temporal energy transfer in single nanoassemblies "Quantum dot - dye molecule" / E. I. Zenkevich, F. Gerlach, C. von Borczyskowski // Квантовая электроника: материалы XI Международной научно-технической конференции, Минск, 13—17 ноября 2017 года / редкол.: М. М. Кугейко (отв. ред.) [и др.]. – Минск : РИВШ, 2017. – С. 70-71.
      2021-07-19

    • The Eurasian Customs Union in transition 

      Wolffgang, Hans-Michael; Brovka, G. M.; Belozerov, I. (Australia and University of Munster, 2013)
      Wolffgang, Hans-Michael. The Eurasian Customs Union in transition / Hans-Michael Wolffgang, G. M. Brovka, I. Belozerov // World Customs Journal / ed.-in-chief David Widdowson. – 2013. – Vol. 7, № 2. – P. 93-103.
      2019-04-10

    • The influence of energy-information impact on an electric vehicle 

      Savluchinsky, V. V.; Avliyokulov, Zh. S.; Valiev, J. F. (Tashkent State Transport University, 2023)
      The main results of studying the energy-informational impact on the driver of an electric vehicle. The parameters of electrical and magnetic fields recorded in the vehicle exhibit fairly complex patterns. A significant influence on the level of electromagnetic radiation comes from the electronic devices for onboard diagnostics and control, passive and active noise and vibration ...
      2024-01-04

    • Theoretical basis for an economic evaluation of road accident losses 

      Kapskij, D.; Samoilovich, T. (2009)
      The article regards the theoretical basis for estimating life value for the purpose of calculating road accident losses. The paper presents a simple structure of accident costs that could be taken into account in order to calculate the total economic value of road accidents. The article also shows the basic methods of estimating life value in different countries for different ...
      2018-03-18

    • Thermal lens study in diode pumped Ng- and Np-cut Nd:KGd(WO4)2 laser crystals 

      Loiko, P. A.; Yumashev, K. V.; Kuleshov, N. V.; Savitski, V. G.; Calvez, S.; Burns, D.; Pavlyuk, A. A. (Optical Society of America, 2009)
      A comparative study of thermal lensing effect in diode laser pumped Ng- and Np-cut Nd:KGd(WO4)2 (KGW) laser crystals was performed for laser emission polarized along the principle refractive axis, Nm. The thermal lens in the Ng-cut Nd: KGW was found to be weakly astigmatic with a positive refractive power for both the Nm- and Np-directions. For Np -cut Nd:KGW, strong astigmatism ...
      2012-01-24

    • Thermal Lensing and Multiwatt Microchip Laser Operation of Yb:YCOB Crystals 

      Loiko, P.; Serres, J. M.; Mateos, X.; Yu, H.; Zhang, H.; Liu, J.; Yumashev, K.; Griebner, U.; Petrov, V.; Aguilo, M.; Diaz, F. (2016)
      Thermal lensing is studied in monoclinic Yb:Ca4YO(BO3)(3) (Yb:YCOB) oxoborate crystals cut along the optical indicatrix axes. For all orientations, the thermal lens is positive. In the Z-cut crystal, the sensitivity factors of the thermal lens are MZ-X = 2.4 and MZ-Y = 2.8 m(-1)/W (for E parallel to X), and the astigmatism degree is as low as S/M = 14%. The positive thermal lens ...
      2018-03-18

    • Thermo-optic characterization of Yb:CaGdAlO4 laser crystal 

      Loiko, P.; Druon, F.; Georges, P.; Viana, B.; Yasukevich, A. (2014)
      Principal thermo-optic coefficients (TOCs), dno/dT and dne/dT, are measured for Yb:CaGdAlO4 crystal, for the first time, to our knowledge. At the wavelength of ~1 μm, they equal –7.6 and –8.6 (Ч10-6 K-1), accordingly. Thermal coefficients of the optical path (TCOP) are determined for this crystal for the principal crystal cuts (a-cut and c-cut) and light polarizations (π or σ). ...
      2017-11-18

    • Thermo-optic properties of Yb:Lu2O3 single crystals 

      Loiko, P. A.; Yumashev, K. V.; Schödel, R.; Peltz, M.; Liebald, C.; Mateos, X.; Deppe, B. (Springer, 2015)
      A detailed study of thermo-optic properties of 1.5 at.% Yb:Lu2O3 single crystal is performed. Thermo-optic dispersion formulas are derived for dn/dT coefficient and thermal coefficient of the optical path. At the wavelength of 1.03 μm, dn/dT = 5.8 × 10−6 K−1. High-precision temperature-dependent measurements of the thermal expansion coefficient α are performed. At the room ...
      2018-09-17

    • Thermoconvective flow velocity in a high-speed magnetofluid seal after it has stopped 

      Krakov, M. S.; Nikiforov, I. V. (Maik Nauka-Interperiodica Publishing, 2012)
      Convective flow is investigated in the high-speed (linear velocity of the shaft seal is more than 1 m/s) magnetofluid shaft seal after it has been stopped. Magnetic fluid is preliminarily heated due to viscous friction in the moving seal. After the shaft has been stopped, nonuniform heated fluid remains under the action of a high-gradient magnetic field. Numerical analysis has ...
      2016-03-29

    • Thermodynamic properties of multicomponent amorphous alloys in Fe-Si-B-Ni and Fe-Si-B-Ni-Co-Cr-Mo systems 

      Khina, B. B.; Goranskiy, G. G. (2016)
      The chemical potential of iron in a amorphous phase of multicomponent multiphase alloys Fe - 7.3% Si - 14.2% B - 8.26% Ni (alloy 1) and Fe - 0.32% Si - 4.8% B - 6.68% Ni - 2.42% Co - 8.88% Cr - 6.42% Mo (alloy 2), which contain crystalline and amorphous phases, was determined on the basis of experimental results and a theoretical model. The alloys were produced by melt quenching ...
      2021-01-21

    • Thermodynamics of Multicomponent Amorphous Alloys: Theories and Experiment Comparison 

      Khina, B. B.; Goranskiy, G. G. (2017)
      On the basis of the existing thermodynamic theories of the amorphous matter (semi-empirical Miedema model and Shao theory), the integral (enthalpy and Gibbs energy) and partial molar characteristics of a multicomponent iron-based amorphous alloy are determined. It is demonstrated that for quaternary alloy Fe – 7.3 % Si – 14.2 % B – 8.26 % Ni these approaches give substantially ...
      2017-11-27

    • Time resolved photoluminescence anisotropy of CdSe/ZnS nanoparticles in toluene at 300 K 

      Petrov, E. P.; Cichos, F.; Zenkevich, E.; Starukhin, D.; Borczyskowski, C. von (2005)
      For CdSe nanoparticles it has been theoretically and experimentally shown that at low temperatures the photoluminescence is circularly polarized in accordance with a wurtzite structure and the corresponding allowed optical transitions. In the present Letter, we report on related investigations on CdSe/ZnS colloids in toluene solution. From time resolved photoluminescence anisotropy ...
      2017-05-27

    • Tm:KLu(WO4)2 microchip laser Q-switched by a graphene-based saturable absorber 

      Serres, J. M.; Loiko, P.; Mateos, X.; Yumashev, K.; Griebner, K. U.; Petrov, V.; Aguilo, M.; Diaz, F. (2015)
      We report on the first Tm-doped double tungstate microchip laser Q-switched with graphene using a Tm:KLu(WO4)2 crystal cut along the Ng dielectric axis. This laser generates a maximum average output power of 310 mW with a slope efficiency of 13%. At a repetition rate of 190 kHz the shortest pulses with 285 ns duration and 1.6 μJ energy are achieved.
      2017-11-18

    • Two-kink solution for the Hirota–Ramani equation for degenerated parameters 

      Knyazev, M. A. (West Ukrainian Physical Society, 2018)
      The Hirota–Ramani equation is considered. Its two-kink solutions are known and may be constructed, for example, by direct methods if the parameters ki, i = 1, 2 of the solution components are not equal to each other. In this paper, such solution is constructed for k1 = k2.
      2023-12-15

    • Ultrafast laser inscribed Yb:KGd(WO4)2 and Yb:KY(WO4)2 channel waveguide lasers 

      Bain, F. M.; Lagatsky, A. A.; Thomson, R. R.; Psaila, N. D.; Kuleshov, N. V.; Kar, A. K.; Sibbett, W.; Brown, C. T. A. (Optical Society of America, 2009)
      We demonstrate laser action in diode-pumped microchip monolithic cavity channel waveguides of Yb:KGd(WO4)2 and Yb:KY(WO4)2 that were fabricated by ultrafast laser writing. The maximum output power achieved was 18.6 mW with a threshold of approximately 100 mW from an Yb:KGd(WO4)2waveguide laser operating at 1023 nm. The propagation losses for this waveguide structure were measured ...
      2012-01-23