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    Wyświetlanie 1-10 z 10
    Tytuł:
    The Guaranteed Power Supply System on the Base of Alternative and Renewable Energy Sources
    Autorzy:
    Abramovich, B. N.
    Sychev, Y. A.
    Fedorov, A. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/262687.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Tematy:
    alternative
    renewable
    power supply
    voltage sag
    power supply interruption
    distributed generation
    guaranteed
    uninterrupted
    Opis:
    The necessity of developing and implementation of the guaranteed power supply system using distributed generation on the base of alternative and renewable energy sources is proved in conditions of responsible technological processes. The theoretical and experimental researches were made in raw mineral enterprises, which have a great amount of responsible technological consumers. The permitted duration of power supply interruption for responsible consumers of continuous technological processes of raw mineral industry is determined. The effectiveness of distributed generation using for guaranteed power supply mode is shown. The reasonability of solar, wind and followed oil gas energy applying in role of power sources for distributed generation is also proved in the paper. The basic variants of guaranteed power supply system structure are described and offered in the paper for all kind of industry and technique, especially for responsible digital control systems and telecommunications.
    Źródło:
    Electrical Power Quality and Utilisation. Journal; 2015, 18, 1; 1-6
    1896-4672
    Pojawia się w:
    Electrical Power Quality and Utilisation. Journal
    Dostawca treści:
    Biblioteka Nauki
    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:
    Interlayer Exchange Coupling in Semiconductor EuS-PbS Ferromagnetic Wedge Multilayers
    Autorzy:
    Kowalczyk, L.
    Wrotek, S.
    Dziawa, P.
    Osinniy, V.
    Szot, M.
    Story, T.
    Sipatov, A. Yu.
    Volobuev, V. V.
    Fedorov, A. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2046924.pdf
    Data publikacji:
    2006-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.Ck
    75.30.Et
    Opis:
    Antiferromagnetic interlayer coupling between ferromagnetic layers of EuS via nonmagnetic PbS spacer layer was experimentally studied in EuS-PbS wedge multilayers grown on KCl (001) substrates with EuS thickness of 6 nm and PbS thickness varying in the wedges in the range 0.3-6 nm (i.e. n=1-20 monolayers). Measurements of magnetic hysteresis loops of EuS-PbS multilayers performed in the temperature range 5-30 K by superconducting (SQUID) and magneto-optical magnetometers revealed a rapid increase in saturation magnetic field in multilayers with PbS spacer thinner than about 1.5 nm. It shows a monotonic increase in interlayer coupling strength with a decreasing PbS spacer thickness, in qualitative agreement with 1/2$\text{}^{n}$ dependence predicted theoretically for semiconductor magnetic superlattices.
    Źródło:
    Acta Physica Polonica A; 2006, 110, 2; 225-231
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First Jurassic mammals from Kyrgyzstan
    Autorzy:
    Nessov, L A
    Kielan-Jaworowska, Z.
    Hurum, J.H.
    Averianov, A.O.
    Fedorov, P.V.
    Potapov, D.O.
    Froyland, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/21388.pdf
    Data publikacji:
    1994
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    docodont ulna
    Docodonta
    mammal
    fossil
    Kyrgyzstan
    Jurassic mammal
    right ulna
    reptilian tooth
    mammalian incisor
    mammalian ulna
    sediment
    Mesozoic mammal
    Źródło:
    Acta Palaeontologica Polonica; 1994, 39, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Serija učenij VVS NATO TAM
    Autorzy:
    Prochorov, A.
    Fedorov, V.
    Powiązania:
    Zarubežnoe Voennoe Obozrenie 1996, nr 10, s. 41-43
    Data publikacji:
    1996
    Tematy:
    "TAM-95" (ćwiczenie wojskowe) NATO 1996 r.
    Lotnictwo taktyczne ćwiczenia teatr wojny NATO Europa Środkowa 1996 r.
    Opis:
    Organizowane przez dowództwo połączonych sił powietrznych NATO na ŚE TDW ćwiczenia-zawody lotnictwa taktycznego TAM.
    Fot., rys.
    Dostawca treści:
    Bibliografia CBW
    Artykuł
    • odwiedzone
    Tytuł:
    Magnetic Properties of EuS-SrS Semiconductor Multilayer Structures
    Autorzy:
    Szot, M.
    Kowalczyk, L.
    Deptuła, P.
    Domukhovski, V.
    Osinniy, V.
    Smajek, E.
    Szczerbakow, A.
    Sipatov, A. Yu.
    Volobuev, V. V.
    Fedorov, A. G.
    Story, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047716.pdf
    Data publikacji:
    2007-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.Ck
    75.30.Et
    Opis:
    Magnetic and structural properties of EuS-SrS semiconductor multilayers were studied by SQUID and magneto-optical Kerr effect magnetometry techniques and by X-ray diffraction method. The multilayers composed of monocrystalline, lattice matched ferromagnetic EuS layers (thickness 35-50Å) and nonmagnetic SrS spacer layers (thickness 45-100Å) were grown epitaxially on KCl (001) substrates with PbS buffer layer. Ferromagnetic transition in EuS-SrS multilayers was found at the Curie temperature T$\text{}_{c}$=17 K. The multilayers exhibit only weak in-plane magnetic anisotropy with [110] easy magnetization axis. Coercive field of EuS-SrS multilayers shows a linear increase with decreasing temperature. Magneto-optical mapping of magnetic hysteresis loops of the multilayers revealed good spatial homogeneity of their magnetic properties.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 2; 419-424
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of EuS/Co Multilayers on KCl and BaF₂ Substrates
    Autorzy:
    Szot, M.
    Kowalczyk, L.
    Story, T.
    Domukhovski, V.
    Knoff, W.
    Gas, K.
    Volobuev, V.
    Sipatov, A.
    Fedorov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811998.pdf
    Data publikacji:
    2008-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Et
    75.75.+a
    Opis:
    Magnetic and structural properties of EuS/Co multilayers were studied by magnetic optical Kerr effect and SQUID magnetometry techniques and by X-ray diffraction method. The multilayers containing monocrystalline, ferromagnetic EuS layer (thickness 35-55 Å) and metallic Co layer (thickness 40-250 Å), were grown on KCl (001) and BaF₂ (111) substrates using high vacuum deposition technique employing electron guns for Co and EuS. All investigated EuS/Co multilayers exhibit ferromagnetic properties at room temperature due to Co layer with the ferromagnetic transition in EuS layer clearly marked upon cooling below 16 K. In EuS/Co/EuS trilayers grown on KCl substrate the antiferromagnetic alignment of magnetization vectors of Co and EuS layers was experimentally observed as a characteristic low field plateau on magnetization hysteresis loops and a decrease in multilayer magnetization below 16 K. In Co/EuS bilayers the characteristic temperature dependent shift of magnetization loops was found due to exchange bias effect attributed to the CoO/Co interface formed by the oxidation of the top Co layer.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 5; 1397-1402
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Free Exciton Luminescence in ZnCdSe Solid Solutions, ZnSe Epitaxial Films and ZnSe$\text{}_{1-x}$S$\text{}_{x}$/ZnSe$\text{}_{1-y}$S$\text{}_{y}$ Superlattices
    Autorzy:
    Tenishev, L. N.
    Permogorov, S. A.
    Fedorov, D. L.
    Yakushcheva, G. G.
    Kuznetsov, P. I
    Powiązania:
    https://bibliotekanauki.pl/articles/1952205.pdf
    Data publikacji:
    1996-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.20.Ci
    Opis:
    We studied the luminescence of bulk Zn$\text{}_{1-x}$Cd$\text{}_{x}$Se solid solutions, epitaxial ZnSe films and ZnSe$\text{}_{1-x}$S$\text{}_{x}$/ZnSe$\text{}_{1-y}$S$\text{}_{y}$ superlattices at T=2-80 K. The analysis of the bands of exciton radiative annihilation with simultaneous emission of 1 or 2 LO phonons shows that the excitons in the studied samples can be considered as free particles with thermalized distribution of kinetic energies. In ZnSe$\text{}_{1-x}$S$\text{}_{x}$/ZnSe$\text{}_{1-y}$S$\text{}_{y}$ superlattices a three-dimensional character of exciton motion was established. The periodic potential of superlattice perturbs the exciton wave vector and induces additional elastic scattering of excitons.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 5; 959-964
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New finds of skeletal fossils in the terminal Neoproterozoic of the Siberian Platform and Spain
    Autorzy:
    Zhuravlev, A.Y.
    Linan, E.
    Gamez Vintaned, J.A.
    Debrenne, F.
    Fedorov, A.B.
    Powiązania:
    https://bibliotekanauki.pl/articles/22120.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    skeletal fossil
    Neoproterozoic
    Siberian Platform
    Spain
    Cloudina
    Ediacaran skeletal fossil
    microstructure
    extinction
    Opis:
    A current paradigm accepts the presence of weakly biomineralized animals only, barely above a low metazoan grade of organization in the terminal Neoproterozoic (Ediacaran), and a later, early Cambrian burst of well skeletonized animals. Here we report new assemblages of primarily calcareous shelly fossils from upper Ediacaran (553–542 Ma) carbonates of Spain and Russia (Siberian Platform). The problematic organism Cloudina is found in the Yudoma Group of the southeastern Siberian Platform and different skeletal taxa have been discovered in the terminal Neoproterozoic of several provinces of Spain. New data on the morphology and microstructure of Ediacaran skeletal fossils Cloudina and Namacalathus indicate that the Neoproterozoic skeletal organisms were already reasonably advanced. In total, at least 15 skeletal metazoan genera are recorded worldwide within this interval. This number is comparable with that known for the basal early Cambrian. These data reveal that the terminal Neoproterozoic skeletal bloom was a real precursor of the Cambrian radiation. Cloudina, the oldest animal with a mineralised skeleton on the Siberian Platform, characterises the uppermost Ediacaran strata of the Ust’−Yudoma Formation. While in Siberia Cloudina co−occurs with small skeletal fossils of Cambrian aspect, in Spain Cloudina−bearing carbonates and other Ediacaran skeletal fossils alternate with strata containing rich terminal Neoproterozoic trace fossil assemblages. These finds treated together provide a possibility to correlate transitional Neoproterozoic– lower Cambrian strata around the world. Such a correlation concurs with available isotope and radiometric data and indicates that typical Ediacaran shelly fossils have not crossed the Precambrian–Cambrian boundary.
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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