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    Wyświetlanie 1-11 z 11
    Tytuł:
    Perspektywiczne koncepcje operacyjnego wykorzystania piechoty morskiej USA
    Autorzy:
    Sergeev, V.
    Powiązania:
    Przegląd Informacyjno-Dokumentacyjny "Marynarka Wojenna" 2001, nr 3, s. 42-48
    Współwytwórcy:
    Szudrowicz, Andrzej. Opracowanie
    Data publikacji:
    2001
    Tematy:
    Piechota morska użycie projekty USA
    Piechota morska reforma USA
    Opis:
    Streszcz.
    Oprac. art. zamieszcz. w "Zarubeznoe Voennoe Obozrenie". --- 2001, nr 4, s. 42-48.
    Dostawca treści:
    Bibliografia CBW
    Artykuł
    Tytuł:
    Perspektywiczne koncepcje operacyjnego wykorzystania piechoty morskiej USA
    Autorzy:
    Sergeev, V.
    Powiązania:
    Przegląd Informacyjno-Dokumentacyjny "Marynarka Wojenna" 2001, nr 3, s. 42-48
    Współwytwórcy:
    Szudrowicz, Andrzej. Opracowanie
    Data publikacji:
    2001
    Tematy:
    Piechota morska użycie projekty Stany Zjednoczone
    Piechota morska reforma Stany Zjednoczone
    Opis:
    Streszcz.; Oprac. art. zamieszcz. w "Zarubeznoe Voennoe Obozrenie". --- 2001, nr 4, s. 42-48.
    Dostawca treści:
    Bibliografia CBW
    Artykuł
    Tytuł:
    Problems of Protection of Urban Areas from Radionuclides Strontium-90 and Caesium-137 after Technological Disasters
    Autorzy:
    Cheremisina, O.
    Sergeev, V.
    Fedorov, A.
    Iliyna, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/124683.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    strontium-90
    caesium-137
    decontamination of radionuclides
    elution of radionuclides
    convection leaching
    heap leaching
    Opis:
    The methods of decontamination of radionuclides from soils are considered. The literature focuses on fixing radionuclides in soils and creating geochemical barriers that it is prevent the spread of pollution. The main disadvantage of these methods is excluding the possibility of building a territory. It is needed to clean up the area to the sanitary and hygienic requirements for further use and then it is desirable to fix the residual activity. The conducted analysis of forms of radionuclides fixation in soils and mechanics of this fixation, therewith revealed that Cs-137 fixed more strongly on mineral components of soil, than Sr-90, which is mainly in the acid-soluble and exchangeable form, and, as a consequence, passes into the liquid phase during soil deactivation more easily. Contaminated soil deactivation in the urbanized territory is possible by washing it by ferric chloride solution at a concentration 0.02–0.05 M and with an equimolar addition of an ammonium chloride. Therewith, most efficient methods, which use in-situ conditions, are heap and convection leaching technologies with treatment degree, which is not less than 80%. At the same time, the most efficient methods which use in-situ conditions are heap and the convection leaching. The hardware-technological scheme of a convection leaching is presented. It is worth to note that ammonium salts additions slightly rise coefficient of treatment from Sr-90. Because ammonium salts are inexpensive, their additions allow to obtain significant economic benefits due to decreasing ferric chloride consumption, which is more valuable, and waste water volume reduction.
    Źródło:
    Journal of Ecological Engineering; 2017, 18, 3; 97-103
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Efficiency of Strontium-90 Desorption Using Iron (III) Solutions in the Decontamination Process of Radioactive Soils
    Autorzy:
    Cheremisina, O.
    Sergeev, V.
    Alabusheva, V.
    Fedorov, A.
    Iliyna, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/123762.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    decontamination of radionuclides
    thermodynamic investigations
    kinetics investigations
    desorption of strontium-90
    iron (III) chloride
    Opis:
    The paper presents the investigation on the estimated efficiency of iron (III) chloride solutions in the decontamination process of radioactive soils with 90Sr, according to kinetic and thermodynamic characteristics of the desorption process. The specific 90Sr radioactivity of soil samples was (3.9±0.3)·104 Bq·g. The adsorption isotherms of Sr2+ and Fe3+ are described with the Langmuir equation. The values of Gibbs energy G0298 = -4.65 kJ·mol-1 and equilibrium ion exchange constant Keq = 6,5 confirm the hypothesis of strontium removal from soils with iron (III) cations. The effectiveness of the method is substantiated by experimental and calculated results of this study samples of radioactive soils are deactivated in 90% after 9.5 hours, whereas the kinetic constant is 6.77·10 s-1. The suggested method of soil cleanup with 0.2 M Fe3+ solutions is optimal and complies with the environmental requirements.
    Źródło:
    Journal of Ecological Engineering; 2018, 19, 2; 149-153
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of the sandy coast: Hydrodynamic and morphodynamic conditions (on the example of the Eastern Gulf of Finland)
    Autorzy:
    Divinsky, B.V.
    Ryabchuk, D.V.
    Kosyan, R.D.
    Sergeev, A.Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/2078924.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Oceanologii PAN
    Tematy:
    sandy coast
    coastal zone
    climate change
    hydrodynamic condition
    morphodynamic condition
    sea level
    surface wave
    sediment transport
    numerical modelling
    Finland Gulf
    Opis:
    Forecasting the coastal zone development under possible climatic changes and technogenic impact is an extremely important task. This forecasting is based on our understanding of the mechanism of the hydrodynamic processes impact on the coastal zone. The goal of this work is to describe the hydrodynamic conditions (currents, sea level, surface waves) of coastal waters and to assess the influence of hydrodynamic parameters on the general dynamics of the beach. The object of this study is a part of the southern coastal zone of the Gulf of Finland (Baltic Sea). The method of research is a full-scale experiment and mathematical modeling. The initial data for the analysis are climatic characteristics of the hydrodynamic regime of the sea (velocity and direction of currents, sea level, integral parameters of wind seas and swell), as well as interannual variations in the position of the coastline in the region of the Izhora village in the eastern part of the Gulf of Finland. Interannual variations in hydrodynamic parameters and volumes of bottom material transported under the influence of wind seas and swell were estimated. Main conclusion: swell waves determine the general background in the patterns of the bottom material transport, and the contribution of wind seas is in the formation of beach properties, namely, the accumulation or decrease of beach material
    Źródło:
    Oceanologia; 2021, 63, 2; 214-226
    0078-3234
    Pojawia się w:
    Oceanologia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The MAS NMR study of solid solutions based on the YAG crystal
    Autorzy:
    Padlyak, B. V.
    Sergeev, N. A.
    Olszewski, M.
    Stępień, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/971533.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    27Al MAS NMR
    local structure
    solid solutions
    yttrium-aluminum garnet (YAG)
    Opis:
    An 27Al magic angle spinning (MAS) nuclear magnetic resonance (NMR) study of nominally pure and Cr-doped yttrium-aluminum garnet (Y3Al5O12 and Y3Al5O12:Cr) crystals is reported. It has been shown that the doping by Cr of the Y3Al5O12 crystals leads to the variation of the occupation by Al atoms both octahedrally and tetrahedrally coordinated sites of the garnet lattice.
    Źródło:
    Nukleonika; 2015, 60, No. 3, part 1; 417-421
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Relaxation of $\text{}^{53}$Cr Spin Echo Signals in Cd$\text{}_{0.985}$Ag$\text{}_{0.015}$Cr$\text{}_{2}$Se$\text{}_{4}$
    Autorzy:
    Abelyashev, G. N.
    Berzhansky, V. N.
    Polulyakh, S. N.
    Sergeev, N. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013365.pdf
    Data publikacji:
    2000-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.20.+q
    76.60.-k
    76.60.Lz
    Opis:
    The frequency dependences of the relaxation times of NMR spin echo signals of quadrupole nuclei $\text{}^{53}$Cr at t$\text{}_{e}$=τ and t$\text{}_{e}$=3τ in ferromagnetic semiconductor Cd$\text{}_{0.985}$Ag$\text{}_{0.015}$Cr$\text{}_{2}$Se$\text{}_{4}$ were investigated at temperature 4.2 K. It was shown that there are two kinds of the quadrupole nuclei $\text{}^{53}$Cr, which have quite different relaxation times. The existence of two kinds of the nuclei $\text{}^{53}$Cr was connected with doping of the cadmium selenochromite with Ag$\text{}^{+}$ ions.zap
    Źródło:
    Acta Physica Polonica A; 2000, 97, 5; 753-756
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Using 2D Distributed Feedback in Optical Laser
    Autorzy:
    Baryshev, V. R.
    Ginzburg, N. S.
    Malkin, A. M.
    Sergeev, A. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047847.pdf
    Data publikacji:
    2007-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.55.Tr
    42.60.Da
    Opis:
    Dynamics of a laser exploiting two-dimensional distributed feedback is considered. Two-dimensional distributed feedback can be realised using a dielectric structure (two-dimensional Bragg resonator) with the width having double-periodical modulation. It is shown that such a structure can provide production of spatial coherent radiation from extended active medium of planar geometry.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 5; 897-901
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamic of water molecules in natrolite
    Autorzy:
    Paczwa, M.
    Sergeev, N. A.
    Olszewski, M.
    Sapiga, A. A.
    Sapiga, A. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1202501.pdf
    Data publikacji:
    2015
    Wydawca:
    Tomasz Mariusz Majka
    Tematy:
    zeolite
    NMR
    natrolite
    water mobility
    Opis:
    Molecular mobility of water molecules has been investigated in the natural zeolite natrolite (Na2Al2Si3O10 ·2H2O) by 1H NMR. Spin-lattice relaxation times in the laboratory and rotating frames (T1 and T1-) have been measured as a function of temperature for a polycrystalline sample. It has been shown that the spin-lattice relaxations times of 1H are governed by the translation motions of water molecules in the natrolite pores. From experimental T1 data it follows that at T > 286 K the diffusion of water molecules along channels parallel to the c axis is observed. From experimental T1 data it follows that at T > 250 K the diffusion of water molecules in transversal channels of natrolite is observed also. At low temperature (T < 250 K) the dipolar interaction with paramagnetic impurities (presumably with Fe3+ ions) become significant as a relaxation mechanism of 1H nuclei.
    Źródło:
    Journal of Education and Technical Sciences; 2015, 2, 1; 15-20
    2300-7419
    2392-036X
    Pojawia się w:
    Journal of Education and Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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