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Wyszukujesz frazę "Fedorov, A." wg kryterium: Autor


Wyświetlanie 1-10 z 10
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:
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:
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
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:
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:
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
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
    Wyświetlanie 1-10 z 10

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