Browsing 2021 by Title

Now showing items 6-25 of 38

    • Calculation of the Effective Energy Release Centerʼs Position of Inorganic Scintillation Detectors for Calibration at Small “Source–Detector” Distances 

      Lukashevich, R.; Fokov, G. (БНТУ, 2021)
      Inorganic scintillation detectors are widely used to measure of dose rate in the environment due to their high sensitivity to photon radiation. A distinctive feature when using such detectors is the need to take into account of the position of the effective energy release center. This peculiarity is actual when using measuring instruments with inorganic scintillation detectors ...
      2021-10-15

    • Calculation of the Effective Energy Release Centerʼs Position of Inorganic Scintillation Detectors for Calibration at Small “Source–Detector” Distances 

      Lukashevich, R.; Fokov, G. (БНТУ, 2021)
      Inorganic scintillation detectors are widely used to measure of dose rate in the environment due to their high sensitivity to photon radiation. A distinctive feature when using such detectors is the need to take into account of the position of the effective energy release center. This peculiarity is actual when using measuring instruments with inorganic scintillation detectors ...
      2021-10-18

    • Compositionally Disordered Doped with Cerium Crystalline Garnet Type Materials for Brighter and Faster Scintillations 

      Korzhik, M. V. (БНТУ, 2021)
      Ce-doped tetracationic garnets (Gd, M)3Al2Ga3O12(M = Y, Lu) form a family of new multipurpose promising scintillation materials. The aim of this work was to evaluate the scintillation yield in the materials of quaternary garnets activated by cerium ions with partial isovalent substitution of the matrix-forming gadolinium ions by yttrium or lutetium ions. Materials were obtained ...
      2021-12-22

    • Deep Learning Automated System for Thermal Defectometry of Multilayer Materials 

      Momot, A. S.; Galagan, R. M.; Gluhovskii, V. Yu. (БНТУ, 2021)
      Currently, along with growth in industrial production, the requirements for product quality testing are also increasing. In the tasks of defectoscopy and defectometry of multilayer materials, the use of thermal nondestructive testing method is promising. At the same time, interpretation of thermal testing data is complicated by a number of factors, which makes the use of traditional ...
      2021-07-07

    • Design of Peltier Element Based on Semiconductors with Hopping Electron Transfer via Defects 

      Poklonski, N. A.; Vyrko, S. A.; Kovalev, A. I.; Anikeev, I. I.; Gorbachuk, N. I. (БНТУ, 2021)
      The study of thermoelectric properties of crystalline semiconductors with structural defects is of practical interest in the development of radiation-resistant Peltier elements. In this case, the spectrum of energy levels of hydrogen-like impurities and intrinsic point defects in the band gap (energy gap) of crystal plays an important role. The purpose of this work is to analyze ...
      2021-03-18

    • Designing a Planar Fluxgate Using the PCB Technology 

      Kolomeitsev, A. A.; Zatonov, I. A.; Pischanskaya, M. I.; Baranov, P. F.; Ilyaschenko, D. P.; Verkhoturova, E. V. (БНТУ, 2021)
      The development of novel methods, scientific devices and means for measuring magnetic fields generated by ultra-low current is among promising directions in the development of medical equipment and instruments for geodetic surveys and space exploration. The present work is to develop a small sensor capable of detecting weak magnetic fields, which sources are biocurrents, radiation ...
      2021-07-07

    • Determination of the Error in Transferring of Length Unit’s Size when Measuring the Nanoparticles’ Diameter Using an Analyzer of Particles’ Differential Electrical Mobility 

      Solomakho, V. L.; Bagdun, A. A. (БНТУ, 2021)
      The quality of nanomaterials and nanotechnologies is largely determined by the stability of the applied technologies, which, to a large extent, depend on the constancy of particle sizes. In this regard, metrological problems arise that are associated both with measuring the dimensions of the microstructure of aerosols, suspensions and powders, and with ensuring the uniformity of ...
      2021-10-15

    • Development and Testing of a Methodology for Assessing of the Correlation Velocity Measurements’ Accuracy for the Hydrodynamic Investigations of the Turbulent Coolant Flow in Nuclear Reactor Elements 

      Konovalov, I. A.; Chesnokov, A. A.; Barinov, A. A.; Dmitriev, S. M.; Khrobostov, A. E.; Legchanov, M. A.; Borodin, S. S.; Makarov, M. A. (БНТУ, 2021)
      The correlation method of the coolant flow measuring is widely used in research practice including for studying of turbulent coolant flows in scale models of elements of nuclear power plants. The aim of this work was to develop a technique for assessing the effect of noise recorded by a measuring system on the flow rate readings obtained using the correlation method. A technique ...
      2021-03-18

    • Development of Executive Equipment Design for Implementing the Process of Generating of Drops of Micro- and Nanoscale Range 

      Kuznetsov, M. A.; Ilyaschenko, D. P.; Kryukov, A. V.; Solodsky, S. A.; Lavrova, E. V.; Verkhoturova, E. V. (БНТУ, 2021)
      Modeling of velocities and temperatures processes distribution in the plasma-forming channel determining the design features and optimal parameters of the plasma torch nozzle is one of promising directions in development of plasma technologies. The aim of this work was to simulate the processes of velocities and temperature distribution in the plasma-forming channel and to determine ...
      2021-03-18

    • Digital Spectral Analysis by means of the Method of Averag Modified Periodograms Using Binary-Sign Stochastic Quantization of Signals 

      Yakimov, V. N. (БНТУ, 2021)
      The method of averaging modified periodograms is one of the main methods for estimating the power spectral density (PSD). The aim of this work was the development of mathematical and algorithmic support, which can increase the computational efficiency of signals digital spectral analysis by this method. The solution to this problem is based on the use of binary-sign stochastic ...
      2021-10-15

    • Digital Spectral Analysis by means of the Method of Averag Modified Periodograms Using Binary-Sign Stochastic Quantization of Signals 

      Yakimov, V. N. (БНТУ, 2021)
      The method of averaging modified periodograms is one of the main methods for estimating the power spectral density (PSD). The aim of this work was the development of mathematical and algorithmic support, which can increase the computational efficiency of signals digital spectral analysis by this method. The solution to this problem is based on the use of binary-sign stochastic ...
      2021-10-18

    • Evaluation of Nonuniformity of Elastic Properties of Sheets Made from Closed-Сell Polyolefin Foams by Acoustic Method 

      Bogdan, O. P.; Zlobin, D. V.; Muraveva, O. V.; Molin, S. M.; Platunov, A. V. (БНТУ, 2021)
      The widespread use of polyolefin foams in strategically important industries is due to their high thermal, sound and vibration insulation properties. The aim of the work was to evaluate the non-uniformity of elastic properties over the area of sheets of polyolefin foams of various types using the acoustic non-contact shadow amplitude method of testing and confirmation by the ...
      2021-03-18

    • Evaluation of the Magnet Breakaway Force Measurement Accuracy of the NT-800 Sensors for Early Detection of Defects of Their Manufacturing 

      Kutsepau, A.; Kren, A.; Hnutsenka, Y. (БНТУ, 2021)
      Сontrol of mechanical stresses formed with the deposition of nickel coatings plays an important role in the diagnosis of coatings’ technical condition. Large internal stresses can lead to cracking or flaking of coatings which is completely unacceptable for critical parts and assembly units used, for example, in space technology for which reliability is of paramount importance. ...
      2021-10-18

    • Evaluation of the Magnet Breakaway Force Measurement Accuracy of the NT-800 Sensors for Early Detection of Defects of Their Manufacturing 

      Kutsepau, A.; Kren, A.; Hnutsenka, Y. (БНТУ, 2021)
      Сontrol of mechanical stresses formed with the deposition of nickel coatings plays an important role in the diagnosis of coatings’ technical condition. Large internal stresses can lead to cracking or flaking of coatings which is completely unacceptable for critical parts and assembly units used, for example, in space technology for which reliability is of paramount importance. ...
      2021-10-15

    • Expanding of Excimer Laser Photoablation’s Functionality in Ophthalmology 

      Alekseev, V. A.; Kostin, V. G.; Usoltseva, A. V.; Usoltsev, V. P.; Yuran, S. I. (БНТУ, 2021)
      One of the significant weaknesses of excimer laser-based vision correction devices is the difficulty of achieving a required change in the refractive properties of the cornea to sharply focus the image on the retina with distance from the working area (ablation zone) center to the periphery due to a change in the laser beam incidence angle. The study is aimed at improving the ...
      2021-10-14

    • Experimental Installation for Determination of Attenuation Coefficient of Permanent Magnetic Field by Protective Materials 

      Fedosyuk, V. M. (БНТУ, 2021)
      The permanent magnetic field in addition to electromagnetic radiation has a significant effect on performance of devices. This is particularly true for highly sensitive precision measuring equipment, such as, for example, magnetometers or photomultiplier tubes. In this regard a new high-performance materials for protection against permanent fields and electromagnetic radiation ...
      2021-03-18

    • High Power Diode-Pumped Erbium Laser Emitting at Near 1.5 μm 

      Gorbachenya, K. N.; Kisel, V. E.; Yasukevich, A. S.; Koporulina, E. V.; Volkova, E. A.; Maltsev, V. V.; Leonyuk, N. I.; Kuleshov, N. V. (БНТУ, 2021)
      Solid-state lasers emitting in the 1.5–1.6 μm spectral range are very promising for eye-safe laser range finding, ophthalmology, fiber-optic communication systems, and optical location. The aim of this work is the investigation of spectrosposcopic and laser properties of gain medium based on borate crystal for abovementioned lasers. Spectroscopic and laser properties of ...
      2021-07-06

    • Improving of Surface Quality of Metal Reflector Mirrors Machined by Single Point Diamond Turning 

      Gusakov, G. A.; Sharonov, G. V. (БНТУ, 2021)
      Improving the technology of diamond turning of aluminum alloys is of great importance for expanding the application areas of metal-optical products based on aluminum in aerospace technology. The aim of this work was to study the effect of surface inhomogeneities of the initial aluminum alloy substrates on their optical and mechanical characteristics and to determine ways of ...
      2021-07-08

    • Impulsively-Laser Excitation and Propagation of Ultrasonic Waves through Nanomagnetic Fluid 

      Baev, A. R.; Mitkovets, A. I.; Asadchaya, M. V.; Mayorov, A. L. (БНТУ, 2021)
      Magnetic fluids belong to the class of nanomaterials with a high gain of light absorption, aggregative and sedimentation stability as well as controllability by external fields, which is of interest to use in the field of optoacoustics. The purpose of the work was to experimentally study the effect of the optoacoustic transformation in a magnetic fluid, depending on the concentration ...
      2021-10-18

    • Impulsively-Laser Excitation and Propagation of Ultrasonic Waves through Nanomagnetic Fluid 

      Baev, A. R.; Mitkovets, A. I.; Asadchaya, M. V.; Mayorov, A. L. (БНТУ, 2021)
      Magnetic fluids belong to the class of nanomaterials with a high gain of light absorption, aggregative and sedimentation stability as well as controllability by external fields, which is of interest to use in the field of optoacoustics. The purpose of the work was to experimentally study the effect of the optoacoustic transformation in a magnetic fluid, depending on the concentration ...
      2021-10-15