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    Wyświetlanie 1-24 z 24
    Tytuł:
    Effect of Nonequilibrium Plasmons on Electron-Plasmon Interactions in Semiconductors
    Autorzy:
    Popov, V. V.
    Bagaeva, T. Yu.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968414.pdf
    Data publikacji:
    1997-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.45.Gm
    72.10.Di
    Opis:
    The effect of nonequilibrium plasmons on the steady-state high-dc-field response of electron gas in n-GaAs is numerically studied via iterative procedure using the Monte Carlo simulation algorithm for hot-electron transport and the Boltzmann equation for plasmons. The electron population inversion in wave vector space along the electric field is predicted to exist for fields in excess of about 10 kVcm. The plasmon distribution disturbances leave the steady-state velocity at low fields almost unaffected but lead to reduction of that up to 10% for fields around and above the maximum of the velocity-field characteristics.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 5; 963-966
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    "Mechanical Alloying-Compaction-Electroplating" as Technological Scheme for the Development of Nanocomposite Coatings
    Autorzy:
    Popov, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1375576.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.Pq
    81.05.Ni
    81.20.Ev
    Opis:
    A novel technique of producing composite electrochemical coatings with non-agglomerated nanodiamond reinforcing particles uniformly distributed in the matrix was developed. The technique is intended for coatings to be applied by transferring material from the anode to the cathode. The anode is fabricated using the mechanical alloying method that enables a composite with the uniform distribution of non-agglomerated nanoparticles to be formed.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4; 1005-1007
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Composite prismatic structure in bivalve shell
    Złożona struktura pryzmatyczna muszli małżów
    Autorzy:
    Popov, S.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/23435.pdf
    Data publikacji:
    1986
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Composite prismatic structure has been examined in Nuculidae, Lucinidae, Cardi- idae, Tellinidae, Psammobiidae, Donacidae and Veneridae. This microstructure is divided into three basic structural varieties: typical composite prismatic, characteristic of Nuculidae (Nucula); fibrous composite prismatic, observed in Cardiidae, Tellinidae, Psammobiidae; and compound composite prismatic mainly characteristic of Donacidae and Veneridae. The observed differences within the structure, the orientation of prisms and the growth pattern are genetically determined. They may considerably supplement the criteria on which the taxonomy of the group is based. At the same time there exist phenotypic, environmentally controlled structural differences.
    Złożona struktura pryzmatyczna była badana u Nuculidae, Lucinidae, Cardiidae, Tellinidae, Psammobiidae, Donacidae i Veneridae. Wymieniona struktura występuje w trzech zasadniczych odmianach: typowa złożona struktura pryzmatyczna, charakterystyczna dla Nuculidae (Nucula); włóknista złożona struktura pryzmatyczna, obserwowana u Cardiidae, Tellinidae, Psammobiidae oraz kombinowana odmiana złożonej struktury pryzmatycznej charakterystyczna głównie dla Donacidae i Veneridae. Takie różnice obserwowane w strukturze jak orientacja pryzm i sposób wzrostu wydają się być zdeterminowane genetycznie. Mogą one w znacznej mierze uzupełnić kryteria taksonomiczne badanej grupy. Równocześnie obserwuje się również fenotypowe różnice strukturalne podlegające wpływowi środowiska.
    Źródło:
    Acta Palaeontologica Polonica; 1986, 31, 1-2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Opredelenie parametrov ehlementov stroitelnykh konstrukcijj c uchetom zadannojj verojatnosti ikh nerazrushenija
    Approach of the systems to design of build constructions
    Autorzy:
    Chemodurov, V.
    Popov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/77891.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    building condition
    nonlinear programming
    optimal decision
    design
    structural element
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 1
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiz neuchtennykh raskhodov vody v sisteme vodootvedenija
    An analysis of unaccounted water in the sewerage system
    Autorzy:
    Zajjchenko, L.
    Lesnojj, V.
    Popov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/76820.pdf
    Data publikacji:
    2013
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    water supply system
    sanitation
    sewage system
    waste water
    service
    cost
    analysis
    Opis:
    The methods of determining the unaccounted water in the sewerage system has been developed. An objective assessment of these costs will assign economically to justify tariffs for water and wastewater services, to carry out targeted work on resource companies on water supply and sanitation.
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 5
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling the optimal structure for territorial technogenic safety system
    Autorzy:
    Popov, V.
    Chub, I.
    Novozhylova, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/411299.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Oddział w Lublinie PAN
    Tematy:
    technogenic safety system
    turbulence surrounding
    technogenic hazards
    stochastic discrete programming
    Opis:
    Turbulence surrounding of the development programs of territory technogenic safety systems impacts the implementation of the program. Thus, it raises the need to design constructive tools of mathematical modeling configured to the phases of the development program in order to increase the efficiency of applying limited human, financial material, time and other resources being involved to solve the problem of technogenic safety systems. We consider both a static optimization model of the technological safety system structure and dynamic one taking into account the state of fixed assets of potentially dangerous industrial object, composition and quantity of hazardous substances being applied and stored at some industrial object, other factors that determine the potential possibility of technogenic incident occurrence. As criteria of the problems one can use forms of known criteria that allow to assess the economic efficiency of different technological safety systems. The main constraints of static and dynamic optimization mathematical models have been proposed and analyzed. In common the problems being considered are stochastic discrete (discrete-continuous) problems of multi-criteria optimization, and their decision is based on the implementation of the branch and bound approach. The approach allows organizing iterative algorithm to identify desired parameters of TTSS development program product.
    Źródło:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2015, 4, 3; 79-84
    2084-5715
    Pojawia się w:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reflection from layered dielectric structures with combined regular and random inhomogeneities
    Autorzy:
    Guzev, M.A.
    Popov, G.V.
    Powiązania:
    https://bibliotekanauki.pl/articles/308755.pdf
    Data publikacji:
    2000
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    optical waveguides
    layered structures
    Opis:
    Optical wave reflection from a layered half-space with regular and random inhomogeneities where the regular perturbations correspond to a linear waveguide near the half-space boundary. Random inhomogeneities are simulated in the frame of the white noise model. The problem is solved analytically in a framework of the embedding method which reduces a boundary problem to the problem with initial values considering the field as a function of the half-space boundary coordinate and obtaining then its solution as a steady-state probability density of the reflection coefficient phase. Numerical calculations revealed some features of the field behaviour under the combined influence of regular and random inhomogeneities such as the reflection coefficient phase increasing inhomogeneity from uniform distribution for small regular inhomogeneities toward a strong peak at the phase equal to pi/2 for increasing ones, and some fine effects which are still greater then the calculation accuracy.
    Źródło:
    Journal of Telecommunications and Information Technology; 2000, 1-2; 80-82
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of Heart Rate Variability Fluctuations by Wavelet Transform
    Autorzy:
    Popov, A.
    Karplyuk, Y.
    Fesechko, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/226306.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    heart rate variability
    HRV fluctuations
    HRV wavelet analysis
    time-dependent HRV estimation
    wavelet transform
    Opis:
    Technique for separate estimation of fast and slow fluctuations in the heart rate signal is developed. The orthogonal dyadic wavelet transform is used to separate the slow heart rate changes in approximation part of decomposition and fast changes in detail parts. Experimental results using the recordings from persons practicing Chi meditation demonstrated the applicability of estimation heart rate fluctuations with the proposed approach.
    Źródło:
    International Journal of Electronics and Telecommunications; 2011, 57, 3; 395-400
    2300-1933
    Pojawia się w:
    International Journal of Electronics and Telecommunications
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of biofertilisers on the vegetative growth, mineral content and physiological parameters of pepper (Capsicum annuum L.) cultivated under organic agriculture conditions
    Wpływ bionawozów na wzrost wegetacyjny, zawartość minerałów oraz parametry fizjologiczne papryki rocznej (Capsicum annuum L.) hodowanej w warunkach rolnictwa organicznego
    Autorzy:
    Vlahova, V.
    Popov, V.
    Boteva, H.
    Zlatev, Z.
    Cholakov, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/11542957.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Tematy:
    biofertilizer
    vegetative growth
    mineral content
    physiological parameter
    pepper
    Capsicum annuum
    plant cultivation
    organic agriculture
    organic condition
    Opis:
    In recent years, biofertilisers have emerged as a promising component of an integrated nutrient supply system in agriculture. The objective of this study was to examine the influence of selected biofertilisers on the vegetative growth, the content of N, P2O5 and K2O in the leaves and stems, and on the physiological parameters of pepper of the variety of ‘Sofiiska Kapiya’ cultivated under organic agriculture conditions. This experiment was carried out from 2009 to 2011 on the experimental fields of the Agroecological Centre at the Agricultural University-Plovdiv (Bulgaria), situated on the territory of a certified ecological farm. The study included the following biofertilisers – Boneprot, Lumbrical, Baikal EM “Effective Microorganisms”, Emosan, and Bio One. The results of the biometric measurements of the average plant height at the end of the vegetative period showed the highest values for the variant treated with Emosan on the Boneprot basic fertilisation (62.60 cm – 2009; 64.80 cm – 2010, and 63.87 cm – 2011). Upon feeding with the biofertilisers Emosan and Baikal EM on basic fertilisation with Boneprot (2009, 2010 and 2011) at the pepper mass fruit yield stage, plants showed higher values of net photosynthesis (PN) that were also similar to the high values observed in the flower bud stage. The highest intensity of transpiration (ȿ) was observed for the variants treated with the biofertilisers Baikal EM (2009 and 2011) and Emosan (2010) on basic fertilisation with Boneprot. It was concluded that the feeding with Emosan stimulated the vegetative growth of the pepper plants due to the high concentrations of nutrient-providing proteins contained in this biofertiliser. The results showed that biofertilisers do not significantly impact the P content of the pepper leaves and stems, but changes were more obvious in the leaves. The fertilisation with the studied biofertilisers increased the K2O content in leaves and stems compared to the control (non-fertilised) plants; the values were higher for the leaves.
    W ostatnich latach bionawozy pojawiły się w rolnictwie jako obiecujący element zintegrowanego systemu dostarcznia składników odżywczych. Celem niniejszego badania było zbadanie wpływu wybranych bionawozów na rozwój wegetacyjny i zawartość N, P2O5 oraz K2O w liściach i łodygach, a także na parametry fizjologiczne papryki rocznej odmiany ‘Sofiiska Kapiya’ uprawianej w warunkach rolnictwa organicznego. Doświadczenie przeprowadzono w latach 2009–2011 na polach doświadczalnych Ośrodka Rolniczo-Ekologicznego Uniwersytetu Rolniczego Plovdiv (Bułgaria) położonych na certyfikowanej farmie ekologicznej. Badanie dotyczyło następujących bionawozów: Boneprot, Lumbrical, Baikal EM “Effective Microorganisms”, Emosan oraz Bio One. Wyniki pomiarów biometrycznych przeciętnej wysokości rośliny pod koniec okresu wegetacyjnego wykazały największe wartości dla odmiany, której aplikowano Emosan przy podstawowym nawożeniu Boneprotem (62,60 cm – 2009; 64,80 cm – 2010 oraz 63,87 cm – 2011). W przypadku podawania bionawozów Emosan i Baikal EM przy podstawowym nawożeniu Boneprotem (2009, 2010 oraz 2011) na etapie plonowania owoców papryki, rośliny wykazywały wększe wartości fotosyntezy netto (PN). Wartości te były podobne do dużych wartości zaobserwowanych na etapie pąków kwiatowych. Największą intensywność transpiracji (E) zaobserwowano u odmian, którym podawano bionawozy Baikal EM (2009 i 2011) oraz Emosan (2010) przy podstawowym nawożeniu Boneprotem. Wyciągnięto wniosek, iż zastosowanie Emosanu stymuluje wzrost wegetacyjny roślin papryki ze względu na wysokie stężenia białek dostarczającyh elementów odżywczych zawartych w tym bionawozie. Wyniki wykazały, że bionawozy nie wpływają w sposób istotny na zawartość P w liściach i łodygach papryki, ale zmiany były bardziej oczywiste w liściach. Nawożenie badanymi nawozami zwiększało zawartość K2O w liściach i łodygach w porównaniu z kontrolą (rośliny nienawożone), a wartości te były większe dla liści.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2014, 13, 4; 199-216
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of boundary effects on electron beam dose distribution formation in multilayer targets
    Autorzy:
    Kałuska, I.
    Lazurik, V. T.
    Lazurik, V. M.
    Popov, G. F.
    Rogov, Y. V.
    Zimek, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/148556.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    absorbed dose
    electron beam
    simulation
    Monte Carlo
    software ModeStEB
    dosimetry
    Opis:
    Computational dosimetry play a significant role in an industrial radiation processing at dose measurements in the product irradiated with electron beams (EB), X-ray and gamma ray from radionuclide sources. Accurate and validated programs for absorbed dose calculations are required for computational dosimetry. The program ModeStEB (modelling of EB processing in a three-dimensional (3D) multilayer flat targets) was designed specially for simulation and optimization of industrial radiation processing, calculation of the 3D absorbed dose distribution within multilayer packages. The package is irradiated with scanned EB on an industrial radiation facility that is based on the pulsed or continuous type of electron accelerators in the electron energy range from 0.1 to 25 MeV. Simulation of EB dose distributions in the multilayer targets was accomplished using the Monte Carlo (MC) method. Experimental verification of MC simulation prediction for EB dose distribution formation in a stack of plates interleaved with polyvinylchloride (PVC) dosimetric films (DF), within a packing box, and irradiated with a scanned 10 MeV EB on a moving conveyer is discussed.
    Źródło:
    Nukleonika; 2010, 55, 3; 363-368
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Combustion Formation of Novel Nanomaterials: Synthesis and Cathodoluminescence of Silicon Carbide Nanowires
    Autorzy:
    Savchyn, V.
    Karbovnyk, I.
    Popov, A.
    Huczko, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1807601.pdf
    Data publikacji:
    2009-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.Hk
    78.67.Bf
    81.07.Bc
    Opis:
    This paper presents the combustion synthesis and characterization of one-dimensional silicon carbide nanostructures (nanowires of 3C-SiC polytype with zincblend structure) by means of cathodoluminescence technique. Cathodoluminescence spectra of nano-SiC samples and, as a reference, of a commercially available SiC micropowder are compared. It is shown that the emission band at 1.97 eV which is slightly evidenced in the spectrum of the commercial SiC under 10 keV electron beam irradiation becomes the prevailing band in CL of the purified silicon carbide nanowires.
    Źródło:
    Acta Physica Polonica A; 2009, 116, S; S-142-S-145
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Middle Cambrian lingulate brachiopods from the Tarbagatay Range, Kazakhstan
    Autorzy:
    Popov, L E
    Holmer, L E
    Gorjansky, V J
    Powiązania:
    https://bibliotekanauki.pl/articles/21219.pdf
    Data publikacji:
    1996
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    brachiopod fauna
    Kostjubella relaxata
    geological setting
    Acrotretida
    Kazakhstan
    Cambrian
    taxonomy
    Stilpnotreta galinae
    Brachiopoda
    systematic palaeontology
    Opis:
    Early Middle Cambrian (Amgian) lingulate brachiopods from the Tarbagatay Range in eastern Kazakhstan represent mostly endemic taxa, which may suggest that the Tarbagatay Range was relatively isolated from adjacent terranes during that time; only Kleithriatreta indicate similarity with the Australian part of Gondwana, as well as with the south and central Kazakhstanian terranes. Late Middle Cambrian (Mayan) taxa from the same area are mostly cosmopolitan. Kostjubella relaxata gen. et sp. n., Prototreta (?) dolosa sp. n. and Stilpnotreta galinae sp. n. are proposed.
    Źródło:
    Acta Palaeontologica Polonica; 1996, 41, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new, unusual rhynchonellide brachiopod with a strophic shell from the Sirurian of Iran
    Autorzy:
    Popov, L.E.
    Hairapetian, V.
    Pour, M.G.
    Modzalevskaya, T.L.
    Powiązania:
    https://bibliotekanauki.pl/articles/20883.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    A new, unusual rhynchonellide brachiopod Jafarirhynchus alatus assigned to the newly established family Jafarirhynchidae is described from the Silurian (Telychian) of the Boghu Mountains in east-central Iran. It forms a low diversity association with the spiriferide Striispirifer? ocissimus, which exhibits well preserved calcified brachial supports. A strophic shell, well-developed ventral interarea and liberosessile mode of life make this taxon unique among Palaeozoic rhynchonellide brachiopods. In spite of a superficial similarity to spiriferides and the atrypide family Davidsonioidea, Jafarirhynchus retains the typical rhynchotrematoid cardinalia with a septalium supported by the median septum, a septiform cardinal process and long, raduliform crura. It is considered as an offshoot of the local lineage, which includes two successive species of Stegocornu (family Rhynchotrematidae) which proliferated in Central Iran and adjacent Afghanistan during Aeronian time.
    Źródło:
    Acta Palaeontologica Polonica; 2015, 60, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of Mechanical Alloying for Production of Aluminium Matrix Composites with Non-Agglomerated Nanodiamond Reinforcing Particles
    Autorzy:
    Popov, V.
    Prosviryakov, A.
    Sagalova, T.
    Többens, D.
    Kiryukhantsev-Korneev, Ph.
    Powiązania:
    https://bibliotekanauki.pl/articles/1375581.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Ni
    81.20.Ev
    Opis:
    Agglomeration is the main problem that prevents large-scale implementation of nanodiamonds in the production of composites. Mechanical alloying was applied for crushing the agglomerates and to obtain uniform distribution of the primary nanodiamond particles in aluminium matrix composites. The commonly used X-ray diffraction method fails to detect non-agglomerated diamond nanoparticles 5 to 6 nm in size, if they are incorporated in a metal matrix. Synchrotron radiation was used for the identification of non-agglomerated nanodiamonds. Scanning electron microscopy and synchrotron investigation showed that mechanical alloying does not lead to transformation of the diamond structure into other allotropic forms of carbon and the nanodiamond reinforcing particles are uniformly distributed in the aluminium matrix.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4; 1008-1011
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of injection technologies in the device of ground constructions in different geological terms
    Zastosowanie technik iniekcyjnych w celu posadowienia konstrukcji w różnych warunkach geologicznych
    Autorzy:
    Dudlya, N. A.
    Popov, A. V.
    Telnih, N. N.
    Tsaplin, E. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/300063.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    technologie iniekcyjne
    injection technologies
    Opis:
    A theoretical ground and examples of successful application of injection re-enforcement of soils for the improvement of his uniformity and rise of bearing strength is given in foundation of different buildings.
    W artykule omówiono podstawy teoretyczne i przykłady skutecznego zastosowania technologii iniekcyjnych w celu poprawy spójności gruntów oraz podwyższenia ich wytrzymałości dla posadowienia fundamentów budynków.
    Źródło:
    Wiertnictwo, Nafta, Gaz; 2009, 26, 3; 507-515
    1507-0042
    Pojawia się w:
    Wiertnictwo, Nafta, Gaz
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Impedance Spectra of As-Grown and Heat Treated $Na_{0.5}Bi_{0.5}TiO_3$ Crystals
    Autorzy:
    Kruzina, T.
    Sidak, V.
    Trubitsyn, M.
    Popov, S.
    Tuluk, A.
    Suchanicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398237.pdf
    Data publikacji:
    2018-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    77.84.-s
    43.58.Bh
    72.80.Rj
    Opis:
    The complex impedance spectra Z*(ω) were studied for as-grown and annealed in air $Na_{0.5}Bi_{0.5}TiO_3$ single crystals. Experimental data showed that annealing significantly increased impedance and led to appearance of low frequency Z* relaxation. The detected relaxation processes were associated with charge transfer within the regions with initial and reduced after annealing concentration of oxygen vacancies.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 4; 816-818
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Silurian stratigraphy of Central Iran - an update
    Autorzy:
    Hairapetian, V.
    Ghobadi Pour, M.
    Popov, L. E.
    Männik, P.
    Miller, C. G.
    Powiązania:
    https://bibliotekanauki.pl/articles/139183.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Iran
    Silurian
    biostratigraphy
    lithostratigraphy
    sedimentology
    correlation
    sylur
    biostratygrafia
    litostratygrafia
    sedymentologia
    korelacja
    Opis:
    The Silurian biostratigraphy, lithostratigraphy, and facies of Central Iran including the Kashmar (Boghu Mountains), Tabas (Derenjal Mountains, Ozbak-Kuh), Anarak (Pol-e Khavand) and Kerman regions is reviewed and updated. The current state of knowledge of the Silurian in the Zagros Basin, Alborz, Kopet-Dagh and Talysh regions, as well as in a few areas scattered across the Sabzevar Zone, and the Sanandaj-Sirjan terranes is also reviewed. Silurian volcanism in various parts of Iran is briefly discussed. The end of the Ordovician coincided with a widespread regression across Iran synchronous with the Hirnantian glaciation, and only in the Zagros Basin is there a continuous Ordovician–Silurian transition represented by graptolitic black shales of the Sarchahan Formation. In the Central-East Iranian Platform marine sedimentation re-commenced in the early to mid Aeronian. By the Sheinwoodian, carbonate platform depositional environments were established along its north-eastern margin. In other parts of Iran (e.g., Kopet-Dagh and the Sabzevar Zone), siliciclastic sedimentation continued probably into the late Silurian. The Silurian conodont and brachiopod biostratigraphy of Central Iran is significantly updated facilitating a precise correlation with the Standard Global Chronostratigraphic Scale, as well as with key Silurian sections in other parts of Iran. The Silurian lithostratigraphy is considerably revised and two new lithostratigraphical units, namely the Boghu and Dahaneh-Kalut formations, are introduced.
    Źródło:
    Acta Geologica Polonica; 2017, 67, 2; 201-233
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Search for Chelyabinsk Meteorite Fragments in Chebarkul Lake Bottom (GPR and Magnetic Data)
    Autorzy:
    Buzin, V.
    Edemsky, D.
    Gudoshnikov, S.
    Kopeikin, V.
    Morozov, P.
    Popov, A.
    Prokopovich, I.
    Skomarovsky, V.
    Melnik, N.
    Berkut, A.
    Merkulov, S.
    Vorovsky, P.
    Bogolyubov, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/307795.pdf
    Data publikacji:
    2017
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    Chelyabinsk meteorite
    Ground Penetrating Radar
    Opis:
    The paper summarizes experimental efforts of the Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation (IZMIRAN) undertaken in search of the biggest part of Chelyabinsk meteorite in the bottom of lake Chebarkul, South Ural, Russia, and to estimate the ecological effects of its subsequent excavation.
    Źródło:
    Journal of Telecommunications and Information Technology; 2017, 3; 69-78
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Defects of Non-Stoichiometry and Dynamic Stability of SnTe Crystal Lattice
    Autorzy:
    Rogacheva, E. I.
    Sinelnik, N. A.
    Nashchekina, O. N.
    Popov, V. P.
    Lobkovskaya, T. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1929741.pdf
    Data publikacji:
    1993-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.70.Bv
    65.70.+y
    Opis:
    The temperature dependencies of coefficient of linear expansion α in the range of 4.2-300 K were obtained for SnTe samples with various degrees of deviation from stoichiometry. For the sample of stoichiometric composition in the α vs. temperature curves the anomalies connected with ferroelectric phase transition were detected. It was found that within cubic phase existence region α isotherms have a minimum at 50.4 at.% Te. Maximum dynamic stability at indicated composition is believed to be associated with the formation of vacancy superstructure.
    Źródło:
    Acta Physica Polonica A; 1993, 84, 4; 733-736
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    X-ray Synchrotron Studies of Nanostructure Formation in High Temperature - Pressure Treated Silicon Implanted with Hydrogen
    Autorzy:
    Wieteska, K.
    Wierzchowski, W.
    Graeff, W.
    Misiuk, A.
    Barcz, A.
    Bryja, L.
    Popov, V. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2035493.pdf
    Data publikacji:
    2002-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    68.55.-a
    61.46.+w
    Opis:
    The effects of various high temperature-pressure treatments in Czochralski grown silicon (Cz-Si) implanted with 130 keV hydrogen to the dose of 4times10$\text{}^{16}$ cm$\text{}^{-2}$ were investigated using synchrotron X-ray topographic methods and rocking curve measurements. The high temperature- pressure processes included 10 h annealing at 450°C, 650°C, and 725°C at argon pressure 12 kbar and 1 bar. The topographic investigations were performed with projection and section methods in back-reflection and transmission geometry. It was found that annealing resulted in significantly reduced strain induced by the implantation, which became undetectable with presently used very sensitive synchrotron arrangement. A significant difference between the Cz-Si:H samples annealed at high and atmospheric pressure was observed. In the first case a distinct topographic contrast attributed to the formation of comparatively larger inclusions was observed. This effect was different at different temperatures. The samples annealed at enhanced pressure were more uniform and often produced significant interference effects.
    Źródło:
    Acta Physica Polonica A; 2002, 102, 2; 239-244
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review of the Ordovician stratigraphy and fauna of the Anarak Region in Central Iran
    Autorzy:
    Popov, L. E.
    Hairapetian, V.
    Evans, D. H.
    Ghobadi Pour, M.
    Holmer, L. E.
    Baars, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/138968.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    darriwilian
    katian
    brachiopods
    cephalopods
    trilobites
    biogeography
    darriwil
    kat
    ramienionogi
    głowonogi
    trylobity
    biogeografia
    Opis:
    The Ordovician sedimentary succession of the Pol-e Khavand area, situated on the northern margin of the Yazd block, has important differences from those in other parts of Central Iran. It has been established that the presumably terminal Cambrian to Lower Ordovician volcano-sedimentary Polekhavand Formation, exposed in the Pol-e Khavand area, has non-conformable contact with greenschists of the Doshakh Metamorphic Complex. The succeeding, mainly siliciclastic Chahgonbad Formation contains low to moderately diverse faunal assemblages, including brachiopods, cephalopods, trilobites and tentaculitids. The Darriwilian age of the lower part of the formation is well established by the co-occurrence of brachiopod genera Camerella, Phragmorthis, Tritoechia and Yangtzeella. The associated rich cephalopod fauna is different from the Darriwilian cephalopod associations of the Alborz terrane and may show some affinity with warm water faunas of North China and South Korea. It is likely that the Mid Ordovician fauna recovered from the lower part of the Chahgonbad Formation settled in the area sometime during a warming episode in the late Darriwilian. By contrast the low diversity mid Katian brachiopod association includes only three taxa, which occur together with the trilobite Vietnamia cf. teichmulleri and abundant, but poorly preserved tentaculitids questionably assigned to the genus Costatulites. This faunal association bears clear signatures linking it to the contemporaneous cold water faunas of the Arabian, Mediterranean and North African segments of Gondwana. Four brachiopod species recovered from the Chahgonbad Formation, including Hibernodonta lakhensis, Hindella prima, Lomatorthis? multilamellosa and Yangtzeella chupananica are new to science.
    Źródło:
    Acta Geologica Polonica; 2015, 65, 4; 403-435
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adaptive potential and productivity of two Salix viminalis L. clonal varieties grown in North Central Bulgaria
    Autorzy:
    Stankova, T.
    Gyuleva, V.
    Tsvetkov, I.
    Popov, E.
    Kalmukov, K.
    Dimitrov, D.N.
    Andonova, E.
    Stefanova, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2130197.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Dendrologii PAN
    Tematy:
    basket willow
    spacing
    rotation
    allometry
    site conditions
    Opis:
    Salix viminalis L. is a broadly cultivated willow species that has been intensively used for breeding purposes, particularly in selection of clones and hybrids for biomass production. The present study aimed to explore and compare growth and adaptability of two basket willow (Salix viminalis L.) clonal varieties - rubra and purpurea - at the specific edaphic and climate conditions and cultivation practice presented in an experimental plantation in North Central Bulgaria. The influence of spacing, genotype, root age and rotation on their productivity were also investigated and allometric relationships for non-destructive estimation of woody plant biomass were suggested. The trial plantation was established in the spring of 2018 as 4 sectors of a Nelder wheel plot with 15 nearly-square spacings, ranging from 0.25 to 9.80 m2 (40000–1020 plants per hectare). The two varieties were arranged in 4 four-spoke sectors (2 sectors per clone). Data collection took place from 2018 to 2020 and comprised 1- and 2-year rotations. The study showed that Salix viminalis var. rubra was more susceptible to desiccation-causing adverse climatic changes, poorly adapted to the specific conditions of the study site and gradually died out during the second and the third year. Salix viminalis var. purpurea exhibited steady survival rate (97 - 77%) and annual biomass productivity varying from 3 to 17 Mg/ha/year across the densities, sectors and years. During the first year of growth purpurea variety had a significantly higher plant weight and sprout number than rubra variety. Growing space affected positively the number of shoots and tree dendromass, and sprouting was reinforced by coppicing that doubled the shoot number during the subsequent rotation. This was reflected in the development of the stump-level allometric models that were differentiated according to rotation. The stump-level allometric model of higher predictive power was based on the main shoot length and shoot number. An exponential relationship to the breast-height shoot diameter was also suggested for biomass estimation of each sprout separately.
    Źródło:
    Dendrobiology; 2022, 88; 1-15
    1641-1307
    Pojawia się w:
    Dendrobiology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetoelastic Anomalies and Suppression of Jahn-Teller Distortions in La$\text{}_{1-x}$Sr$\text{}_{x}$MnO$\text{}_{3}$ by Pulsed Magnetic Fields
    Autorzy:
    Kadomtseva, A. M.
    Popov, Yu. F.
    Vorob'ev, G. P.
    Kamilov, K. I.
    Ivanov, V. Yu.
    Mukhin, A. A.
    Balbashov, A. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2013240.pdf
    Data publikacji:
    2000-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Kz
    75.50.Pp
    Opis:
    Thermal expansion Δl/l(T) and magnetostriction λ$\text{}_{∥, ⊥ }$(H,T) in the pulsed magnetic fields H up to 250 kOe were studied in the single La$\text{}_{1-x}$Sr$\text{}_{x}$MnO$\text{}_{3}$ crystals (x=0.1, 0 .125, and 0.15) at temperatures T=10-320 K. Anomalies in the Δl/l (T) curves were observed near a charge (polaron) ordering (T$\text{}_{p}$) and structural transitions between orthorhombic Jahn-Teller distorted O' phase and high temperature orthorhombic (pseudocubic) O$\text{}^{*}$ one (T'$\text{}_{s}$). A noticeable increase in the field-induced magnetostriction λ$\text{}_{∥, ⊥ }$(H) was revealed in the O' phase at T$\text{}_{p}$
    Źródło:
    Acta Physica Polonica A; 2000, 97, 3; 599-602
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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