Внеуниверситетские публикации ученых БНТУ: Recent submissions

Now showing items 2701-2720 of 4615

    • Экономическое стимулирование инновационной деятельности сотрудников вуза 

      Ольховик, И. В. (2016)
      Статья посвящена экономическому стимулированию инновационной деятельности сотрудников вуза. Проанализированы цели, приоритеты, принципы, функции и задачи кадровой политики в вузе. Разработан метод расчета величины стимулирующих премий за инновационную активность сотрудникам вуза.
      2017-11-24

    • Constructive Theory of Scalar Characteristic Equations of the Theory of Radiation Transport: II. Algorithms for Finding Solutions and Their Analytic Representations 

      Rogovtsov, N. N. (2015)
      We present methods for finding discrete spectra and derive analytic expressions for the eigenfunctions of scalar characteristic equations of the theory of radiation transport. We obtain new two-term recursion formulas and analytic representations for solutions of infinite tridiagonal systems of linear algebraic equations. We obtain analytic forms of the resolvents of scalar ...
      2017-11-23

    • Calculation of Residual Magnetic-Field Distributions upon Hysteretic Interference of a Pulsed Magnetic Field 

      Pavlyuchenko, V. V.; Doroshevich, E. S.; Pivovarov, V. L. (2015)
      Equations that are used for the calculation and distributions of the electrical voltage U(t) output from a magnetic-field transducer as it scans a discrete magnetic medium with recorded residual magnetic fields, which were produced in it by acting individual magnetic-field pulses with opposite-polarity surges, are reported. The distributions were obtained via the Delphi programming ...
      2017-11-23

    • The Shape of the Magnetic Fluid Surface above a Magnetizable Sphere in a Uniform Magnetic Field 

      Bashtovoi, V. G.; Motsar, A. A.; Naletova, V. A.; Reks, A. G. (2015)
      The shape of the free surface of a magnetic fluid above a spherical ferromagnetic body immersed in it in a uniform magnetic field is investigated experimentally. The effect of the direction and magnitude of the magnetic field on the deformation characteristics of the free surface of the magnetic fluid with various magnetic properties and geometrical parameters is established.
      2017-11-23

    • Damping of a Solution of Linear Autonomous Difference–Differential Systems with Many Delays Using Feedback 

      Metel’skii, A. V.; Urban, O. I.; Khartovskii, V. E. (2015)
      For linear autonomous difference-differential systems with commensurable delays, the problem of damping the solution by using a linear difference-differential controller with a state feed-back is solved. A generalization of these results to linear autonomous difference-differential systems of neutral type with commensurable delays in the case of a continuous solution is proposed. ...
      2017-11-22

    • Erratum to: Thermo‑optic coefficients of Nd‑doped anisotropic KGd(WO4)2, YVO4 and GdVO4 laser crystals 

      Loiko, P. A.; Yumashev, K. V.; Kuleshov, N. V.; Pavlyuk, A. A. (2016)
      Erratum to: Thermo‑optic coefficients of Nd‑doped anisotropic KGd(WO4)2, YVO4 and GdVO4 laser crystals / P. A. Loiko [et al.] // Applied Physics B. – 2016. – Vol. 129.
      2017-11-22

    • Acoustic Response to the Action of Nanosecond Laser Pulses on an In/CdTe Thin-Film Heterostructure 

      Vlasenko, A. I.; Veleshchuk, V. P.; Gnatyuk, V. A.; Levitskii, S. N.; Vlasenko, Z. K.; Ivlev, G. D.; Gatskevich, E. I. (2015)
      The photothermoacoustic method has been used for diagnostics of thermobarodynamic processes in the metal In(400 nm)/semiconductor (CdTe) thin-film system under nanosecond laser irradiation (7 ns, λ = 532 nm) in natural conditions (in air) and in a liquid medium (water). From the analysis of the data obtained, the dependence of the pressure induced in the energy-release region on ...
      2017-11-22

    • 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

    • 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

    • Insensitivity of the Stationary Distribution of State Probabilities in an Open Network with Non-Active Customers 

      Kruk, Yu. S.; Dudovskaya, Yu. E. (2015)
      We study the stationary operation of an open queueing network with non-active customers and informational signals. The amount of work to service a claim is a random value with an arbitrary distribution. The stationary distribution of network state probabilities has a multiplicative form and is insensitive with respect to the functional form of the distribution of the work needed ...
      2017-11-21

    • Structure and nonlinear optical properties of novel transparent glass-ceramics based on Co2+:ZnO nanocrystals 

      Loiko, P. A.; Dymshits, O. S.; Vitkin, V. V.; Skoptsov, N. A.; Zhilin, A. A.; Shemchuk, D. V.; Tsenter, M. Ya.; Bogdanov, K. V.; Malyarevich, A. M.; Glazunov, I. V.; Mateos, X.; Yumashev, K. V. (2016)
      Transparent glass-ceramics (GCs) based on Co2+:ZnO nanocrystals (mean diameter, 11 nm) are synthesized on the basis of cobalt-doped glasses of the K2O–ZnO–Al2O3–SiO2 system. For these GCs, the absorption band related to the 4A2(4F) → 4T1(4F) transition of Co2+ ions in tetrahedral sites spans until ~1.73 μm. Saturation of the absorption is demonstrated at 1.54 μm, with a saturation ...
      2017-11-18

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

      Serres, J. M.; Loiko, P.; Mateos, X.; Yumashev, K.; Griebner, 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

    • 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

    • Spectroscopy of tetragonal Eu:NaGd(WO4)2 crystal 

      Loiko, P. A.; Vilejshikova, E. V.; Mateos, X.; Serres, J. M.; Dashkevich, V. I.; Orlovich, V. A.; Yasukevich, A. S.; Kuleshov, N. V.; Yumashev, K. V.; Grigoriev, S. V.; Vatnik, S. M.; Bagaev, S. N.; Pavlyuk, A. A. (2016)
      We report on growth and detailed spectroscopic study of Eu3ю-doped tetragonal sodium gadolinium double tungstate, Eu:NaGd(WO4)2, a new promising crystal for deep-red lasers. Large-volume crystal doped with 4.9 at.% Eu is grown by Czochralski method along the [001] crystallographic direction. Absorption of Eu3ю ions is studied at room temperature (RT) and at 6 K. For the absorption ...
      2017-11-18

    • Microchip laser operation of Tm,Ho:KLu(WO4)2 crystal 

      Loiko, P.; Serres, J. M.; Mateos, X.; Yumashev, K.; Kuleshov, N.; Petrov, V.; Griebner, U.; Aguilo, M.; Diaz, F. (2014)
      A microchip laser is realized on the basis of a monoclinic Tm,Ho-codoped KLu(WO4)2 crystal cut for light propagation along the Ng optical indicatrix axis. This crystal cut provides positive thermal lens with extremely weak astigmatism, S/M = 4%. High sensitivity factors, M = dD/dPabs, of 24.9 and 24.1 m−1/W for the mg- and pg- tangential planes are calculated with respect to the ...
      2017-11-15

    • Практическая реализация образовательной деятельности кафедры на платформе облачных технологий 

      Кутовенко, А. А.; Сидорик, В. В.; Соломахо, В. Л. (2016)
      В статье рассматриваются особенности применения универсальных облачных платформ в дистанционном обучении. Раскрывается практический опыт организации информационных ресурсов кафедры с использованием облачной платформы «Документы Google».
      2017-11-15

    • Micro-Raman Investigation of Hydrogen Localized in Cone-Shaped Defects Formed on the Silicon Wafer Surface 

      Frantskevich, N. V.; Fedotov, A. K.; Frantskevich, A. V.; Mazanik, N. V. (2014)
      The goal of this work is the micro-Raman study of molecular hydrogen localized in cone-shaped defects, which are formed on the surface of previously helium implanted and annealed Czochralski Si wafers as a result of hydrogen plasma treatment. The line at ≈ 4158 cm corresponding to molecular hydrogen is observed in the Raman spectra when the laser beam is focused both on cone-shaped ...
      2017-11-04

    • Influence of Shell Parameters on Optical Properties of Spherical Metallic Core-Oxide Shell Nanoparticles 

      Pustovalov, V. K.; Astafyeva, L. G. (2015)
      Different metal homogeneous nanoparticles have been extensively studied in recent years due to their wide range of potential applications. It is very interesting to investigate core-shell nanoparticles with oxide shell from core metal. The formation of oxide shell on metallic nanoparticles can be achieved by different chemical and physical methods including also natural oxidation ...
      2017-11-04

    • Оценка значимости вклада геоэкологических факторов в формирование эпидемиологических рисков. Построение и первичный анализ таблиц сопряженности 

      Лаптенок, С. А. (РНПЦ медицинских технологий, информатизации, управления и экономики здравоохранения, 2015)
      Статья продолжает серию публикаций с анализом (на примере Воложинского и Столбцовского районов Минской области Республики Беларусь) связи заболеваемости населения злокачественными новообразованиями с проживанием на территориях с различными геоэкологическими характеристиками. Для количественной оценки значимости влияния геофизических факторов, действующих в зонах линеаментов земной ...
      2017-10-31

    • Моделирование процесса торможения двухколесного транспортного средства 

      Баханович, А. Г.; Михальцевич, Н. Р. (2015)
      В статье рассматривается конструкция тормозной системы с АБС для мотоцикла и процесс моделирования торможения, используя пакет AMESim и стенд полунатурного моделирования (Tire Hardware-In-The-Loop Simulator). Предложенная система АБС состоит из электронного и гидравлического блоков управления и датчиков угловой скорости колес. В предложенной системе применен до-экстремальный ...
      2017-10-30