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    Wyświetlanie 1-28 z 28
    Tytuł:
    Spontaneous Magnetostriction of $Lu_2Fe_{17-x}Si_x$
    Autorzy:
    Andreev, A.
    Daniš, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813624.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.-y
    75.80.+q
    Opis:
    Thermal expansion of $Lu_2$ $Fe_{17-x}Si_x$ solid solutions was measured by X-ray powder diffraction. The magnetic ordering in all compounds within the homogeneity range (x≤3. 4) is accompanied by a large spontaneous volume magnetostriction distributed anisotropically over the principal axes of the hexagonal crystal structure. The volume effect ω_s in the ground state reaches $14.7×10^{-3}$ in $Lu_2Fe_{17}$ and decreases monotonously to $8.9×10^{-3}$ at x = 3.4 following the reduction of magnetic moment. Despite still large $ω_s$, the Invar behavior observed in $Lu_2Fe_{17}$ changes to a positive thermal expansion for x >1 due to increasing Curie temperature.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 239-242
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Logistic management by freight traffics of contiguous types of transport
    Zarządzanie logistyczne w przewozach towarowych współpracujących rodzajów transportu
    Autorzy:
    Golybenko, A.
    Gubacheva, L.
    Andreev, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/374827.pdf
    Data publikacji:
    2010
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    system logistyczny
    zarządzanie
    współpracujące rodzaje transportu
    transfer
    logistic system
    management
    contiguous types of transport
    Opis:
    The results of investigation of interaction of two contiguous types of sea and railway transport are presented by means of the method of factor-by-factor analysis. Logistic system of management by the freight and wagon traffics is offered, which will allow considerably to shorten time of transfer of freight units from one type of transport to another.
    Źródło:
    Transport Problems; 2010, 5, 3; 83-88
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forming the intermodal system of freight transportation on the east of Ukraine
    Tworzenie systemu intermodalnych przewozów towarowych na wschód Ukrainy
    Autorzy:
    Golubenko, A.
    Gubacheva, L.
    Andreev, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/375186.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    system intermodalny
    przewóz towarów
    zarządzanie
    intermodal system
    freight transport
    management
    volumetric-calendar planning
    Opis:
    In this work the method of volumetric-calendar planning and production schedule drafting- the network planning - have been considered for the case, which is related to serial or serial-parallel execution of certain works and operations in order to shorten the total delivery cycle of intermodal freight in containers.
    Źródło:
    Transport Problems; 2012, 7, 2; 27-35
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The quantum diffusion of carbon in alfa-iron in low temperature
    Autorzy:
    Dąbrowski, L.
    Andreev, A.
    Georgiev, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/147484.pdf
    Data publikacji:
    2006
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    carbon
    diffusion
    tunneling
    adiabatic
    polaron
    Opis:
    Recent experimental data on the diffusion coefficient of carbon in á-iron below liquid nitrogen temperature (LNT) question the classical approach to the observed temperature dependence. As the temperature is lowered below LNT, the diffusion constant tends to a nearly temperature-independent value rather than continuing its activated trend. The low temperature branch is apparently characteristic of a quantum mechanical process dominated by tunneling in ground state. Concomitantly we apply an occurrence-probability approach to describing the overall temperature dependence as a single continuous rate. Within the adiabatic approximation the electronic eigenvalue depending parametrically on the nuclear coordinates is taken to be the potential energy to control the motion of the nuclei. The resulting rate involves all horizontal-tunneling energy-conserving elastic transitions at the quantized energy levels of the migrating atom. A small though not negligible slope in the temperature dependence as the temperature is raised below 100 K is dealt with by complementing for the rate of a parallel one-phonon inelastic-tunneling process in excess to the basic elastic-tunneling rate. Our combined approach agrees well with the experimental data. In particular, the frequency of the coupled vibration is obtained virtually identical to the carbon vibrational frequency from inelastic neutron scattering data. The migrational barrier is also found to be within the limits expected for alfa-iron.
    Źródło:
    Nukleonika; 2006, 51, 2; 93-99
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of upgraded hopper cars in the mining industry
    Ispolzovanie modernizirovannykh vagonov-khopperov v dobyvajushhejj promyshlennosti
    Autorzy:
    Gubacheva, L.
    Andreev, A.
    Leonova, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/792396.pdf
    Data publikacji:
    2012
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    transportation
    rock
    dump
    hopper car
    mining industry
    railway rolling stock
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forming of logistical system of organization of freight transportations in megapolises
    Autorzy:
    Golubenko, A.
    Gubacheva, L.
    Andreev, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/374364.pdf
    Data publikacji:
    2009
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    transport towarów
    logistyka miejska
    freight transportations
    transportations in megapolises
    Opis:
    The questions of forming of the logistical system of organization of freight transportations in megapolises on terminal technology are considered. Solution of task of choice of optimum location of distributive centre and decreasing of total expenditures on delivery of freight is offered.
    Źródło:
    Transport Problems; 2009, T. 4, z. 3, cz.2; 97-103
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New hopper-cars with one-sided self-unloading
    Novye vagony-khoppery s odnostronnejj samorazgryzkojj
    Autorzy:
    Gubacheva, L.
    Andreev, A.
    Leonova, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/792551.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    hopper car
    modernization
    structure
    traffic safety
    modelling
    rolling stock
    transportation
    railway track
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2014, 14, 1
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Operational aspects of screw feeder of transport gasifier with pellet burner
    Osobennosti raboty shnekovogo litatelja transportnogo gazogeneratora s pelletnojj gorelkojj
    Autorzy:
    Gubacheva, L.
    Andreev, A.
    Shevchenko, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/793127.pdf
    Data publikacji:
    2012
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    pellet burner
    industrial transport
    transport gasifier
    working condition
    screw feeder
    experimental investigation
    worm conveyor
    Źródło:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
    1641-7739
    Pojawia się w:
    Teka Komisji Motoryzacji i Energetyki Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Anisotropy of $Lu_2Co_{17-x}Si_x$ Single Crystals
    Autorzy:
    Tereshina, E.
    Andreev, A.
    Šantavá, E.
    Daniš, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813622.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.-m
    75.30.Gw
    Opis:
    Magnetic anisotropy of $Lu_2Co_{17-x}Si_x$ single crystals grown by the Czochralski method was investigated. The homogeneity range of Si substitution for Co extends up to x = 3.4 in $Lu_2Co_{17-x}Si_x$ solid solutions. The unit cell volume, Curie temperature, and spontaneous magnetic moment decrease monotonously with increasing Si content. $Lu_2Co_{17}$ has the easy-plane type of magnetic anisotropy in the ground state, which changes into the easy-axis type by two spin-reorientation transitions of the second-order, the easy-plane-easy-cone at $T_{SR1}$~680 K and the easy-cone - easy-axis at $T_{SR2}$~730 K. Upon Si substitution, the observed spin-reorientations shift towards the lower temperatures for $Lu_2Co_{17-x}Si_x$ $(T_{SR1}$~75 K and $T_{SR2}$~130 K in $Lu_2Co_{16}Si$) and vanish for compounds with 1
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 235-238
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Structure in UIrAl
    Autorzy:
    Prokeš, K.
    Prchal, J.
    Sechovský, V.
    Andreev, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813678.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.25.+z
    Opis:
    By means of neutron diffraction on a hexagonal UIrAl single crystal we find that this system orders ferromagnetically at low temperatures with magnetic moments of 0.93 (10) $μ_B$ aligned along the c axis. The Curie temperature $T_C$ = 65 (5) K determined from the diffraction experiment is in good agreement with bulk magnetic measurements.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 339-342
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Specific Heat and Magnetism of $LuFe_6Al_6$
    Autorzy:
    Svoboda, P.
    Andreev, A.
    Šantavá, E.
    Šebek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813662.pdf
    Data publikacji:
    2008-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.40.Cx
    65.40.Ba
    Opis:
    Here we present the results of the zero-field specific heat study of the $LuFe_6Al_6$ single crystal. The specific heat data were analyzed as a sum of the phonon, electronic, and magnetic contributions, respectively. The analysis of the phonon part involves three acoustic and 36 optical branches, respectively, all of them corrected for the anharmonicity. The magnetic part of the specific heat was obtained by subtracting the electronic and the phonon part from the experimental specific heat and the magnetic entropy was calculated.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 1; 307-310
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ageing of cadmium telluride radiation detectors and its diagnostics with low frequency noise
    Autorzy:
    Andreev, A.
    Sik, O.
    Grmela, L.
    Sikula, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/221866.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    noise spectroscopy
    CdTe radiation detectors
    ageing process
    Opis:
    Samples of CdTe single crystals which are used as radiation detectors were periodically measured during a long time interval with different values of an applied voltage. The samples were also periodically exposed during long time periods to high temperatures of 390 K and to rapid changes of temperature from 300 K to 390 K. After 1.5 years of measurements we observed ageing of the samples which resulted in deterioration of their transport characteristics. The resistance of the samples increased significantly and current-voltage characteristics were unstable in time. Noise spectroscopy showed that low frequency noise can be used for detection of CdTe sample ageing as its spectral density increases significantly comparing to the 1/f noise of a high quality sample.
    Źródło:
    Metrology and Measurement Systems; 2013, 20, 3; 385-394
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Perspective method to guarantee the reliability for the rolling stock of the railway
    Autorzy:
    Golybenko, A.
    Gubacheva, L.
    Andreev, A.
    Mokrousov, S.
    Shcherbakov, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/374447.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
    Tematy:
    niezawodność
    tłumik cierny
    pojazd szynowy
    kolej
    reliability
    friction damper
    rolling stock
    railway
    Opis:
    The design method how to increase the reliability of the railroad underframe frictional dampers has been given. The new design for frictional wedge has been suggested, it helps to decrease both the wear of friction wedge and the deterioration of the connected with shpinton sleeve.
    Źródło:
    Transport Problems; 2012, 7, 4; 33-37
    1896-0596
    2300-861X
    Pojawia się w:
    Transport Problems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Amorphous 5f Ferromagnetic Hydrides $UH_{3}Mo_{x}$
    Autorzy:
    Tkach, I.
    Kim-Ngan, N.
    Maškova, S.
    Andreev, A.
    Matěj, Z.
    Havela, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1369135.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Kj
    75.50.Vv
    72.15.Cz
    Opis:
    γ-U metal, stabilized down to room temperature in the bcc structure by Mo doping, can absorb hydrogen at high $H_{2}$ pressures only. The product is amorphous hydride $UH_{3}Mo_{x}$ analogous to $β-UH_{3}$. Such hydrides are ferromagnetic with high Curie temperatures (up to 200 K), enhanced with respect to $β-UH_{3}$. Magnetic moment of U also increases. Large disorder together with high anisotropy lead to a very high coercivity, reaching 4 T at low temperatures. As amorphization normally tends to suppress magnetic ordering of U compounds, such hydrides represent a new class of materials, amorphous U-based ferromagnets with relatively high Curie temperature.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 292-293
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure and Properties of Multilayer Nanostructured Coatings TiN/MoN Depending on Deposition Conditions
    Autorzy:
    Pogrebnjak, A.
    Abadias, G.
    Bondar, O.
    Postolnyi, B.
    Lisovenko, M.
    Kyrychenko, O.
    Andreev, A.
    Beresnev, V.
    Kolesnikov, D.
    Opielak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1365941.pdf
    Data publikacji:
    2014-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.46.-w
    62.20.Qp
    62.25.-g
    Opis:
    This work presents the results of TiN/MoN coatings studying. These multilayer nanostructured coatings demonstrate dependence on depositions conditions on nanometer level. The influence of nanosized monolayer thickness on structure changing and properties of nanocomposite multilayer coatings TiN/MoN was found. Multilayer TiN/MoN coatings of the total thickness from 6.8 to 8.2 μm were obtained using C-PVD method. Thicknesses of monolayers were 2, 10, 20, 40 nm. The structure of samples was studied using X-ray diffraction (Bruker D-8 Advance) in Cu $K_{α}$ radiation, high resolution transmission electron microscopy with diffraction CFEI EO Techai F200, scanning electron microscopy with energy dispersive X-ray spectroscopy (JEOL-7001F), and microhardness measurements in dependence on indenter load. Scratch tests (friction, wear, etc.) were also provided using Rockwell-C diamond indenter (CSM Revetest Instruments) with a tip radius of 200 μm. Friction and wear behavior were evaluated using ball-on-plate sliding test on a UMT-3MT tribometer (CETR, USA). With decreasing monolayer thickness the hardness value increases, and the size of nanograins reduces. The values obtained for the friction coefficient of the multilayer system is much smaller than in nanostructured coatings of TiN (nc) or MoN (nc). Annealing showed formation of a (Ti,Mo)N solid solution and small growth of nanocrystals.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 6; 1280-1283
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optically Active Si:Er Layers Grown by the Sublimation MBE Method
    Autorzy:
    Stepikhova, M.
    Andreev, A.
    Andreev, B.
    Krasil'nik, Z.
    Shmagin, V.
    Kuznetsov, V.
    Rubtsova, R.
    Jantsch, W.
    Ellmer, H.
    Palmetshofer, L.
    Preier, H.
    Karpov, Yu.
    Piplits, K.
    Hutter, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1992203.pdf
    Data publikacji:
    1998-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.15.Hi
    Opis:
    We report the first application of sublimation molecular beam epitaxy to grow uniformly and selectively doped Si:Er layers with Er concentration up to 5×10$\text{}^{18}$ cm$\text{}^{-3}$. The Hall concentration of electrons is about 10% of total Er contents. The mobility is 300-400 cm$\text{}^{2}$ V$\text{}^{-1}$ s$\text{}^{-1}$ at 300 K. All samples exhibit photoluminescence at 1.537 μm up to 100-140 K.
    Źródło:
    Acta Physica Polonica A; 1998, 94, 3; 549-554
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Light Absorption and Photoluminescence in Quantum Dots and Artificial Molecules
    Autorzy:
    Firsov, D.
    Vorobjev, L.
    Panevin, V.
    Fedosov, N.
    Shalygin, V.
    Samsonenko, J.
    Tonkikh, A.
    Cirlin, G.
    Andreev, A.
    Kryzhanovskaya, N.
    Tarasov, I.
    Pikhtin, N.
    Ustinov, V.
    Hanna, S.
    Seilmeier, A.
    Julien, F.
    Zakharov, N.
    Werner, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2041673.pdf
    Data publikacji:
    2005-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.30.Fs
    Opis:
    Intraband absorption in n- and p-doped structures with InAs/GaAs quantum dots covered by InGaAs layers is studied both experimentally and theoretically. The absorption cross-section for p-type quantum dots was found to be significantly smaller than that for n-type quantum dots. Interband absorption bleaching under strong interband excitation is found and investigated in undoped quantum dot structures. Structures with artificial molecules were grown. Photoluminescence spectra and transmission electron microscopy images proves the presence of coupled symmetrical quantum dots.
    Źródło:
    Acta Physica Polonica A; 2005, 107, 1; 158-162
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modification of MIS Devices by Irradiation and High-Field Electron Injection Treatments
    Autorzy:
    Andreev, D.
    Bondarenko, G.
    Andreev, V.
    Maslovsky, V.
    Stolyarov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030209.pdf
    Data publikacji:
    2017-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    72.20.Ht
    72.20.Jv
    73.20.At
    73.40.Qv
    73.40.Ty
    77.22.Jp
    77.55.-g
    Opis:
    Methods to modify gate dielectrics of MIS structures by irradiation treatments and high-field electron injection into dielectric are considered. In addition, distinctive features of these methods used to correct parameters of MIS devices are studied. It was found out that negative charge, accumulating in the thin film of phosphosilicate glass (PSG) of the MIS structure having a two-layer gate dielectric SiO_2-PSG under the high-field injection or during the irradiation treatment can be used to correct the threshold voltage to improve the charge stability and raise the voltage of breakdown for the MIS devices. It is proved that the density of electron traps rises with the increasing thickness of the PSG film. In this paper a method to modify electrophysical characteristics of MIS structures by the high-field tunnel injection of electrons into the gate dielectric under the mode of controlled current stress is proposed. The method allows to monitor changing of MIS structure parameters directly during the modification process.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 2; 245-248
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Breast cancer imaging by means of optoacoustic technique: initial experience
    Autorzy:
    Andreev, V. G.
    Oraevsky, A. A.
    Karabutov, A. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/332227.pdf
    Data publikacji:
    2001
    Wydawca:
    Polskie Towarzystwo Akustyczne
    Opis:
    A clinical prototype of the laser optoacoustic imaging system (LOIS) for breast cancer detection with 32-element transducer array is described. The frequency band of transducer array provided 0.5-mm axial in-depth resolution. Cylindrical shape of the 10-cm long array enabled us to receive the lateral resolution of 1.0 mm in the vicinity of focal zone. The system sensitivity provided detection of a 2-mm absorbing sphere at the depth of 60mm. An automatic recognition of the optoacoustic signal detected from the irradiated surface was implemented in order to visualize the breast surface and improve the accuracy of tumor localization. Radial back-projection algorithm was used for image reconstruction. Optimal filtering of image was employed to reduce low and high frequency noise. Time necessary for data acquisition and image reconstruction was reduced to 32 sec. The system performance was evaluated initially by imaging of the small absorbing objects in breast tissue-like phantoms. Clinical ex-vivo studies of mastectomy specimens were performed and compared with X-ray radiography and ultrasound.
    Źródło:
    Hydroacoustics; 2001, 4; 1-4
    1642-1817
    Pojawia się w:
    Hydroacoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modification of MOS Devices by High-Field Electron Injection and Arc Plasma Jet Treatment
    Autorzy:
    Andreev, V.
    Bondarenko, G.
    Maslovsky, V.
    Stolyarov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402221.pdf
    Data publikacji:
    2015-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.40.Qv
    73.40.Gk
    Opis:
    Methods of modification of gate dielectrics of the MOS structures by high-field electron injection and arc plasma jet treatment were studied. It is possible to use them for correction of parameters, decreasing defects number and increasing reliability of MOS devices. It was found that the negative charge accumulated in the film of the phosphorus-silicate glass of the MOS structures with the two-layer gate dielectric SiO₂-phosphorus-silicate glass under the high-field electron injection can be used for modification of devices with the same structures. It is shown that the injection-thermal treatment allows to find and exclude MOS structures with defects of isolation and charge defects. Arc plasma jet treatment was found to improve characteristics of the MOS devices. These treatments increase injection and radiation resistance of the gate dielectric by creating the needed density of electron traps in the bulk of SiO₂ film.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 5; 887-890
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modification of Gate Dielectric in MOS Devices by Injection-Thermal and Plasma Treatments
    Autorzy:
    Andreev, V.
    Bondarenko, G.
    Maslovsky, V.
    Stolyarov, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1381776.pdf
    Data publikacji:
    2014-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.40.Qv
    73.40.Gk
    Opis:
    The influence of injection-thermal and plasma treatments on the characteristics of the MOS-structure is studied. It is shown that the thermal stable part of the negative charge which accumulates in the phosphorus-silicate glass (PSG) film in the structures with the two-layer gate dielectric $SiO_2$-PSG under high-field Fowler-Nordheim electron injection can be used for the characteristics modification of MOS-structures with above described structure. The injection-thermal and plasma treatments of MOS-structures are offered to use for improving the reliability and finding the samples which have the charge defects. It is found that using the injection-thermal and plasma treatments allows to increase the injection and radiation stability of the dielectric films of MOS-structures due to structural changes in the $SiO_2$ film and $Si-SiO_2$ interface.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 6; 1371-1373
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New iterative method of solving nonlinear equations in fluid mechanics
    Autorzy:
    Palivets, M.
    Andreev, E.
    Bakshtanin, A.
    Benin, D.
    Snezhko, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/2106452.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    trzęsienie ziemi
    mechanika płynów
    porowatość
    Adomian Decomposition Method ADM
    earthquake
    filtration
    fluid mechanics
    iterative method
    nonlinear fractional partial differential equations
    porous medium
    Opis:
    This paper presents the results of applying a new iterative method to linear and nonlinear fractional partial differential equations in fluid mechanics. A numerical analysis was performed to find an exact solution of the fractional wave equation and fractional Burgers’ equation, as well as an approximate solution of fractional KdV equation and fractional Boussinesq equation. Fractional derivatives of the order are described using Caputo's definition with 01<α≤ or 12<α≤. A comparative analysis of the results obtained using a new iterative method with those obtained by the Adomian decomposition method showed the first method to be more efficient and simple, providing accurate results in fewer computational operations. Given its flexibility and ability to solve nonlinear equations, the iterative method can be used to solve more complex linear and nonlinear fractional partial differential equations.
    Źródło:
    International Journal of Applied Mechanics and Engineering; 2021, 26, 3; 163--176
    1734-4492
    2353-9003
    Pojawia się w:
    International Journal of Applied Mechanics and Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Forming impulses for partial demagnetizing of rare-earth permanent magnets
    Formowanie impulsów dla częściowego odmagnesowania magnesów trwałych z ziem rzadkich
    Autorzy:
    Makarov, D.A.
    Nesterin, V.A.
    Yakovlev, L.S.
    Andreev, V.N.
    Spiridonov, A.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/159927.pdf
    Data publikacji:
    2006
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Elektrotechniki
    Tematy:
    magnes trwały
    pierwiastki ziem rzadkich
    odmagnesowanie
    impuls
    rare-earth permanent magnets
    impuls magnetizing methods
    Opis:
    In manufacture of facilities with permanent magnets there are some tasks when application of gauged magnitudes of magnetic characteristics of permanent magnets is required. In order to solve such tasks it is necessary to develop the methods of partial demagnetizing. Within an impulse magnetic field it is carried out at the expense of feeding series of impulses of demagnetizing field. For monitoring a level of a magnet field the carrying force P of the permanent magnet may be used. The choice of the law of impulse forming depends on the set requirements in an exactitude and productivity of the partial demagnetizing process. Process of partly demagnetizing assumes one-side approximation to a certain value of magnetization along the magnetizing curve, beginning from the maximal value, without operations of partly magnetic bias of the permanent magnet when its magnetization decreased below the given level. Comparing the different laws of forming impulses is made using mathematical modeling of the partial demagnetizing process, based on real characteristics of permanent magnets.
    W wyrobie produktów z magnesami trwałymi zachodzi konieczność stosowania określonych charakterystyk magnetycznych. W tym celu konieczne jest opracowanie metod częściowego odmagnesowania przez powodowanie szeregu impulsów pola odmagnesowującego. Dla obserwowania poziomu pola magnetycznego można użyć siłę nośną P magnesu trwałego. Wybór prawa, formowanie impulsu zależy od zadanych wymagań odnośnie dokładności i skuteczności procesu odmagnesowania. Proces częściowego odmagnesowania zakłada przybliżenie pewnej wartości namagnesowania wzdłuż krzywej magnesowania zaczynając od wartości maksymalnej bez działania częściowego magnetycznego magnesowania wstępnego magnesu trwałego gdy namagnesowanie maleje poniżej danego poziomu. Porównanie różnych praw formowania impulsów wykonuje się stosując modelowanie matematyczne procesu odmagnesowania, w oparciu o rzeczywiste charakterystyki magnesów trwałych.
    Źródło:
    Prace Instytutu Elektrotechniki; 2006, 229; 149-159
    0032-6216
    Pojawia się w:
    Prace Instytutu Elektrotechniki
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication and Study of $GdMnO_{3}$ Multiferroic Thin Films
    Autorzy:
    Andreev, N.
    Abramov, N.
    Chichkov, V.
    Pestun, A.
    Sviridova, T.
    Mukovskii, Ya.
    Powiązania:
    https://bibliotekanauki.pl/articles/1550592.pdf
    Data publikacji:
    2010-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.47.Lx
    75.50.Ee
    75.70.Ak
    77.90.+k
    Opis:
    Laboratory technology of $GdMnO_{3}$ thin film fabrication was elaborated. Samples of $GdMnO_{3}$ were fabricated at $NdGaO_{3}$ substrate by magnetron sputtering using off-axis scheme. Structure and phase content of the samples obtained were studied as well as their magnetic properties. The surface topography of the films was observed by atomic force microscopy. Presence of peculiarities at the temperature dependences of magnetic susceptibility points at magnetic phase transitions in $GdMnO_{3}$, which were found before in the single crystals. This fact jointly with X-ray data shows that at definite fabrication regimes one can obtain the multiferroics thin film $GdMnO_{3}$ modification, and the film quality permits to carry out accurate study of the compound in question.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 1; 218-220
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An integrated approach to development and simulation manufacturing processes of optical products
    Autorzy:
    Yablochnikov, E. I.
    Vasilkov, S. D.
    Andreev, Y. S.
    Pirogov, A. V.
    Tretyakov, S. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/406888.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    optical products
    polymer lens
    simulation
    CAD/CAM/CAE
    technological process
    injection molding
    additive technologies
    cyber-physical systems
    Opis:
    The engineering management process and automation method for making pilot set of optical polymer parts used in LED systems are considered. Optical system and lens geometry development are realized in Zemax. 3D model and molding tools with further generating of NC coded data are developed in Cimatron E. Pre simulation of injection molding process is realized in Moldex3D and thermo-mechanical analysis is provided by OOFELIE. 3D printer Objet is used for parts prototyping on different stages of the process. Data and process management are realized with a help of PDM system SmarTeam.
    Źródło:
    Management and Production Engineering Review; 2015, 6, 4; 94-103
    2080-8208
    2082-1344
    Pojawia się w:
    Management and Production Engineering Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Practice of Geobotanical Indication of Forest Growth Conditions in the Steppe and Wooded Steppe Ecotone in Central Mongolia
    Autorzy:
    Gunin, Petr D.
    Bazha, Sergey N.
    Miklyaeva, Inessa M.
    Karimova, Tatiana Y.
    Petukhov, Igor A.
    Andreev, Anatoly V.
    Bogdanov, Evgenij A.
    Tsyrempilov, Enkhe G.
    Powiązania:
    https://bibliotekanauki.pl/articles/124792.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    Baikal catchment basin
    ecosystems
    belt groups of plants
    zonal groups of plants
    environmental conditions
    humidity factor
    Opis:
    The forest conditions in the Central Aimag of Mongolia, located in the southern part of the Baikal catchment area, near the southern border of the forest-steppe subzone, were examined within the framework of this study. The field materials collected in the summer 201–2018 at the Zuunmod Model polygon serve as the core of the study. An ecosystem map of the Model polygon with the scale 1:50 000 and the Key plot with the scale 1:5 000 was drawn up using World Viеw-2 satellite imagery data (2016). The proven method of botanical indication of forest growth conditions is as follows: identification of the ecologic and coenotic groups of plant species, calculation of the moisture coefficient based on the ratio of the number of species included in the groups characterizing the extreme conditions of the moisture gradient and distribution of communities in accordance with the values of the gradient in the ecological series. Communities of stages of ecological series serve as indirect indicators of the forest conditions: Stage I: Кu <1, insufficient humifying for tree growth, Stage II: Кu 1–2, average humifying, Stage III: Кu >2, sufficient humifying for tree growth. The stages also correspond to the landscape conditions and the character of the vegetation cover.
    Źródło:
    Journal of Ecological Engineering; 2020, 21, 2; 10-21
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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