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Mityurich G.S.,Belarusian Trade and Economics University of Consumer Cooperatives | Chernenok E.V.,Gomel State University | Sviridova V.V.,Gomel State University | Serdyukov A.N.,Gomel State University
Crystallography Reports | Year: 2015

Photoacoustic transformation of the TE mode of a Bessel light beam (BLB) has been studied for piezoelectric detection in short-period superlattices formed by magnetoactive crystals of bismuth germanate (Bi12GeO20) and bismuth silicate (Bi12SiO20) types. It is shown that the resulting signal amplitude can be controlled using optical schemes of BLB formation with a tunable cone angle. A resonant increase in the signal amplitude has been found in the megahertz range of modulation frequencies and its dependences on the BLB modulation frequency, geometric sizes of the two-layer structure and piezoelectric transducer, radial coordinate of the polarization BLB mode, and dissipative superlattice parameters are analyzed. © 2015, Pleiades Publishing, Inc. Source


Shalupaev S.V.,Gomel State University | Serdyukov A.N.,Gomel State University | Mityurich G.S.,Belarusian Trade and Economics University of Consumer Cooperatives | Aleksiejuk M.,Polish Academy of Sciences | And 2 more authors.
Archives of Metallurgy and Materials | Year: 2013

The results of finite-element modeling of controlled laser thermosplitting of crystalline silicon are presented. The case of treatment by two laser beam with wavelengths, namely 0.808 pm and 1.06 pm is studied. Calculations of the thermoelastic fields formed in a single-crystalline silicon wafer as a result of consecutive two-beam laser heating and action of coolant were performed for silicon crystalline orientations: (100), (110), (111). Modeling was performed for circular and U-shaped laser beams. The results received in the presented work, can be used for the process optimization concerning the precise separation of silicon wafers by laser cutting. Source


Mityurich G.S.,Belarusian Trade and Economics University of Consumer Cooperatives | Aleksiejuk M.,Polish Academy of Sciences | Sviridova V.V.,Gomel State University | Serdyukov A.N.,Gomel State University
Archives of Metallurgy and Materials | Year: 2013

The paper treats the thermooptical sound generation in the magnetoactive two-layered medium on the condition of tunnel interference of electromagnetic waves. It were studied the conditions of complete suppression of the photoacoustic signal amplitude in response to the polarization type of oppositely interacting waves, the difference in their initial phases as well as the intensities of one of the oppositely interacted beams. The given paper provides an effective method of managing the thermooptical sound generation in the magnetoactive structural element during the tunnel electromagnetic interference of electromagnetic waves. Source


Lopukhov G.P.,A-D Technologies | Maskalev M.V.,Gubkin Russian State University of Oil and Gas | Zhevnova N.G.,Belarusian Trade and Economics University of Consumer Cooperatives
Neftyanoe Khozyaistvo - Oil Industry | Year: 2012

The results of the specific energy consumption are given for production of oil In the water flooding, thermal and gas methods. It Is noted that the methods of enhanced oil recovery, which are considered as Independent ways to develop, should be comparable energy costs with the baseline method, water flood. Source


Pinchuk L.S.,National Academy of Sciences of Belarus | Goldade V.A.,National Academy of Sciences of Belarus | Kuzmenkova N.V.,Belarusian Trade and Economics University of Consumer Cooperatives | Sytsko V.E.,Belarusian Trade and Economics University of Consumer Cooperatives | And 2 more authors.
Fibre Chemistry | Year: 2013

An effective method for protecting securities from counterfeiting is to incorporate into the paper mass chemical fibers containing specific additives distributed in a predetermined manner throughout the fiber length. Results from modifying polyester fibers with luminescent dyes using a crazing mechanism were presented. SEM and AFM were used to show craze generation steps, their transformation into fibrils, and redistribution of modifiers incorporated into the crazes in the fiber surface layer. A procedure for concentrating luminescent dyes and colloidal nickel particles on localized fiber parts with alternation of untreated parts and those containing the specific additives was described. The magnetic susceptibility of fiber parts containing ferromagnetic nickel was confirmed experimentally by measurements of the fiber magnetic moment using a high-field magnetic measurement system. Polyester fibers with parts of luminescent color separation alternating along the length were produced. It was concluded that the technology for modifying chemical fibers using a crazing mechanism enabled the controlled incorporation of specific additives in localized fiber parts. This satisfied optimally criteria for protecting paper filled with such fibers from counterfeiting. © 2013 Springer Science+Business Media New York. Source

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