Внеуниверситетские публикации ученых БНТУ: Recent submissions

Now showing items 2461-2480 of 4461

    • Compact passively Q-switched diode-pumped Tm:KY(WO4)2 laser with 8 ns/30 μJ pulses 

      Gaponenko, M. S.; Onushchenko, A. A.; Kisel, V. E.; Malyarevich, A. M.; Yumashev, K. V. (2012)
      A compact diode-pumped solid-state Tm:KY(WO4)2 laser with cavity length of 1 cm passively Q-switched with a PbS-quantum-dot-based saturable absorber is presented. The laser operates at the wavelength of 1.94 ¹m and produces pulses with duration of 8 ns and energy of 30 ¹J at the repetition rate up to 4.2 kHz. The maximum output power of 120 mW is achieved at incident pump power ...
      2018-03-18

    • Some aspects of sherardizing implementation during anti-corrosion protection of heat-treated metal parts 

      Konstantinov, V. M.; Buloichyk, I. A. (2015)
      The article reveals the peculiarities of obtaining Zn anticorrosive diffusion layers on heat-treated metal parts using sherardizing method. It is shown that sherardizing processes can be successfully used as a final heat treatment operation for some metal parts after hardening in a temperature gap between 350-700 degrees C. 380-450 degrees C. are the most efficient temperatures ...
      2018-03-15

    • Choosing The Risk Curve Type 

      Vlasenko, O.; Kozlov, S. (2009)
      Dialectics of categories of risk and return are becoming increasingly important in business process. The knowledge of risk indices allows to shape the judgement and make a decision. The provided risk-management method lets to make more reasonable and adequate managing decisions. The paper provides the substantiation of necessity of the enterprise risk level integral estimation. ...
      2018-03-15

    • Broadly tunable femtosecond mode-locking in a Tm:KYW laser near 2 μm 

      Lagatsky, A. A.; Calvez, S.; Gupta, J. A.; Kisel, V. E.; Kuleshov, N. V.; Brown, C. T. A.; Dawson, M. D.; Sibbett, W. (Optical Society of America, 2011)
      Efficient mode-locking in a Tm:KY(WO4)(2) laser is demonstrated by using InGaAsSb quantum-well SESAMs. Self-starting ultrashort pulse generation was realized in the 1979-2074 nm spectral region. Maximum average output power up to 411 mW was produced around 1986 nm with the corresponding pulse duration and repetition rate of 549 fs and 105 MHz respectively. Optimised pulse durations ...
      2018-03-15

    • Biomechanical properties of composite compact-porous titanium produced by electric discharge sintering 

      Minko, D.; Belyavin, K.; Sheleg, V. (2017)
      The main disadvantage of currently used endosteal implants is their unsatisfactory biostable performance. Under action of functional stress caused by flaws of the design or lower mechanical characteristics the areas of stresses extreme concentration exceeding strength limits of bone tissue appears in the bone surrounding the implant that leads to the tearing away the implant. The ...
      2018-03-15

    • Формирование межкультурной компетенции студентов переводческих специальностей 

      Конышева, А. В. (Полоцкий государственный университет, 2015)
      Обучение иностранному языку студентов – будущих переводчиков - должно знакомить не только с языком как таковым, но и с культурой страны изучаемого языка, а также путем сравнения язык может оттенять особенности национальной культуры и знакомить с общечеловеческими ценностями. Иными словами, обучение иностранному языку должно содействовать воспитанию студентов в контексте диалога ...
      2018-03-14

    • Применение линейки оценки радиационной обстановки для прогнозирования величины и структуры санитарных потерь 

      Грубеляс, В. В.; Савлучинский, В. В.; Саевич, Т. Н. (БГМУ, 2018)
      Максимально точное прогнозирование возможных величины и структуры санитарных потерь является основой для планирования медицинского обеспечения предстоящих боевых действий. Расчет величины санитарных потерь в зависимости от количества предполагаемых общих потерь учитывает влияние основных условий боевой деятельности войск, в которых они возникают и которыми определяются. Использование ...
      2018-03-12

    • Развитие художественно-эстетических потребностей студентов университета 

      Гончарова, Е. П.; Авдонина, Т. В. (Гомельский государственный университет имени Ф. Скорины, 2013)
      В статье обсуждается актуальная проблема формирования нравственной позиции и художественно-эстетических потребностей студентов университета. Рассматриваются теоретические основы становления культурного отношения человека к действительности, выделяются функции искусства в духовно-нравственном развитии социума, анализируются практические результаты исследования художественно-эстетических ...
      2018-03-12

    • Formation of Cone-Shaped Inclusions and Line Defects on the Cz-Si Wafer Surface by the Helium Implantation and DC Nitrogen Plasma Treatment 

      Frantskevich, N. V.; Mazanik, A. V.; Frantskevich, A. V.; Koltunowicz, T.; Zukowski, P. (2011)
      The general goal of this work is to investigate the defects formed on the surface of the Cz-Si wafers subjected to helium implantation, vacuum annealing and nitrogen plasma treatment. The performed scanning electron microscopy study has shown that in the general case two types of surface defects can be formed: cone-shaped inclusions with the base diameter of 0.2-2 mu m and the ...
      2018-03-10

    • The design and composition of expansion joints on big-span bridges with intensive heavy-duty traffic 

      Busel, A.; Krotau, R. (2016)
      In the Republic of Belarus the roads with a high intensity of transport most widely employ expansion joints with rubber and steel compensators fastened to the reinforced concrete base with embedded therein studs. While operated expansion joints are exposed to various kinds of operational and climatic impacts causing their damage. Expansion joints destruction results in a sharp ...
      2018-03-10

    • Operation of a Spark-Ignition Engine on Mixtures of Petrol and N-Butanol 

      Kukharonak, H.; Ivashko, V.; Pukalskas, S.; Rimkus, A.; Matijosius, J. (2017)
      The Article analyses the use of n-butanol (biobutanol) in mixtures with petrol in spark-ignition (SI) internal combustion engines (ICE). Analysis of the scientific literature allowed determining that n-butanol content had a different effect on the same engine parameters in different tests, thus a decision was made to conduct additional research, where, having assembled the necessary ...
      2018-03-10

    • Composite Materials for Steel Cutting and Concrete Crushing 

      Usherenko, Y.; Usherenko, S.; Yazdani, J. (2017)
      The steel based on composite material, created by the stitching of steel matrix by a flow of powder particles. Stitching process implemented in conditions of super deep penetration (SDP) which provides a penetration of the powder particles at speed 1000 m/s on depth up to hundred millimeters. Due to the interaction between the particles and the steel matrix at pulsating pressureabove ...
      2018-03-10

    • Anchorage of Retaining Walls and Antilandslide Structures 

      Nikitenko, M.; Boiko, I.; Sernov, V.; Chernoshey, N.; Sikorae, N. (2013)
      The article describes the experience of designing, arrangement and testing of anchors for fixing the protection of deep foundation pits in narrow urban areas on various construction projects during the reconstruction.
      2018-03-10

    • Effect of Vertical Cross-Sectional Shape of Foundation on Settlement and Bearing Capacity of Soils 

      Boiko, I. L.; Alhassan, M. (2013)
      Load-settlement relationships of shallow foundation models with different vertical cross-sectional shapes on different modeled subsoil conditions are presented. Model of shallow foundations with rectangular, wedge and T-shape vertical cross-sections were studied. The study generally shows that bulk of the load resistance of subsoil bases at the instance of shallow foundations ...
      2018-03-10

    • 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

    • Application of Modern Educational Technologies at the Research University 

      Kachalov, N.; Velsh, A.; Antonova, Z.; Konysheva, A.; Proschaeva, N. (2015)
      Application of modern educational technologies for diagnosing set education results, student motivation increase, influencing creative thinking ability aimed at problem solving, critical understanding of information and independent educational activity skills development are discussed in the paper.
      2018-03-10

    • Bautin ideal of a cubic map 

      Benediktovitch, I.; Romanovski, V. (2001)
      We compute the radical of the ideal generated by the first three focus quantities of maps defined by irreducible branches of a cubic curve on the real plane. It is shown that the ideal is not radical in this case.
      2018-03-10

    • Modeling of spraying with time-dependent material feed rate 

      Stepanenko, D. A. (2007)
      This paper presents a mathematical model for predicting the thickness of coatings deposited by means of spraying onto rotating parts with circular symmetry, for the case of time-dependent material feed rate. A procedure for calculating the material feed rate control law providing production of coatings with uniform thickness or coatings with a predefined law of thickness variation ...
      2018-03-10

    • Changing of technical and operational road parameters caused by traffic load and climatic factors 

      Leonovich, I.; Melnikova, I. (2014)
      Climatic factors and car wheels are the reasons of changes in road condition: deformations of subgrade, cracks, potholes and rut appear, roughness and safety are deteriorating, and the strength of the road structure reduces. In our opinion, cracks in the road structure are of particular importance. The appearance of cracks causes the destruction of the whole road structure during ...
      2018-03-10

    • Nonlinear thermo-optical properties of two-layered spherical system of gold nanoparticle core and water vapor shell during initial stage of shell expansion 

      Pustovalov, V. K.; Astafyeva, L. G. (2011)
      Nonlinear thermo-optical properties of two-layered spherical system of gold nanoparticle core and water vapor shell, created under laser heating of nanoparticle in water, were theoretically investigated. Vapor shell expansion leads to decreasing up to one to two orders of magnitude in comparison with initial values of scattering and extinction of the radiation with wavelengths ...
      2018-03-06