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    Wyświetlanie 1-10 z 10
    Tytuł:
    Założenia polityki zagranicznej Józefa Piłsudskiego w okresie stanowienia Państwa
    Autorzy:
    Łossowski, Piotr (1925- ).
    Powiązania:
    Niepodległość i Pamięć 1997, nr 9, s. 61-65
    Data publikacji:
    1997
    Tematy:
    Piłsudski, Józef (1867-1935)
    Sesja naukowa nt.: Józef Piłsudski. Polski żołnierz, mąż stanu (w 60 rocznicę śmierci) (12-13.05.1995; Warszawa)
    Opis:
    Referat wygłoszony na sesji naukowej "Józef Piłsudski. Polski żołnierz, mąż stanu (w 60 rocznicę śmierci)". Warszawa, 12-13 V 1995 r.
    Dostawca treści:
    Bibliografia CBW
    Artykuł
    Tytuł:
    Wide Frequency Range AC Magnetic Properties of Fe-Based Composite Materials
    Autorzy:
    Kollár, P.
    Birčáková, Z.
    Füzer, J.
    Füzerová, J.
    Bureš, R.
    Fáberová, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1507025.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Ni
    85.70.-w
    75.60.-d
    75.50.Bb
    Opis:
    The aim of this work was to analyze the influence of resin content on contribution of the hysteresis, eddy current and anomalous losses to the total losses in the frequency range from DC to 150 kHz. The samples of composite material were prepared in the form of the ring with outer diameter of 25 mm, inner diameter of 17 mm and height approximately 3 mm and in the form of cylinder with diameter of 25 mm and height approximately 3 mm by a compaction of mixture of iron powder ASC100.29 (90 vol.%) and commercial termoset resins. The DC hysteresis losses were obtained by the measurements of DC hysteresis loops and the total power losses in the frequency range 0.4 Hz-150 kHz from AC hysteresis loops, both at maximum induction 0.05, 0.1 and 0.2 T. The magnetic properties of the composite rings were compared with the properties of the material prepared from the powder supported by Höganäs AB Sweden. By analyzing the frequency dependence of total losses of the Fe-based SMC we found out that hysteresis losses contribute to the total losses as a majority component.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 759-761
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ultraviolet Detectors Based on ZnO:N Thin Films with Different Contact Structures
    Autorzy:
    Ievtushenko, A.
    Lashkarev, G.
    Lazorenko, V.
    Karpyna, V.
    Sichkovskyi, V.
    Kosyachenko, L.
    Sklyarchuk, V.
    Sklyarchuk, O.
    Bosy, V.
    Korzhinski, F.
    Ulyashin, A.
    Khranovskyy, V.
    Yakimova, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1811930.pdf
    Data publikacji:
    2008-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Dz
    81.15.Cd
    85.60.Dw
    72.40.+w
    Opis:
    Al/ZnO:N/Al and Ni/ZnO:N/Al diode photodetectors fabricated by dc magnetron sputtering of ZnO:N films on p-Si substrates are studied. The photocurrent-to-dark current ratio equal to 250 at λ= 390 nm and the time constant of photoresponse about 10 μs for Al/ZnO:N/Al structures with 4 μm interdigital spacing was achieved. The Ni/ZnO:N/Al diode structure has the rectification ratio ≈10² at bias 1 V, the maximal responsivity about 0.1 A/W is observed at 365 nm, and the measured time constant of photoresponse is about 100 ns.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 5; 1123-1129
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Possible Long Time Tails in Current-Current Correlation Function for Two-Dimensional Electron Gas in Random Magnetic Field
    Autorzy:
    Łusakowski, A.
    Turski, Ł. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1968462.pdf
    Data publikacji:
    1997-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    05.60.+w
    72.10.-d
    Opis:
    We consider a two-dimensional degenerate electron gas in the presence of perpendicular random magnetic field. The magnetic field disorder which is assumed to be Gaussian is characterized by two parameters. The first is proportional to the amplitude of local magnetic field fluctuations. The second one characterizes the disorder on the longer scale - we call it the screening length. Using the Kubo formula for the conductivity we have found a class of diagrams which leads to the long time tails in the current-current correlation function. For short times in comparison with the diffusion time corresponding to the screening length this function behaves like logarithm of time, for longer times it decays like t$\text{}^{-1}$ which of course brings into question the diffusive character of the behavior of the charged particle in random magnetic field widely assumed in the literature.
    Źródło:
    Acta Physica Polonica A; 1997, 92, 6; 1109-1115
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parking in the City: an Example of Limited Resource Sharing
    Autorzy:
    Šeba, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1585124.pdf
    Data publikacji:
    2009-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    05.45.+b
    05.20.-y
    05.60.+w
    Opis:
    During the attempt to park a car in the city the drivers have to share limited resources (the available roadside). We show that this fact leads to a predictable distribution of the distances between the cars that depends on the length of the street segment used for the collective parking. We demonstrate in addition that the individual parking maneuver is guided by generic psychophysical perceptual correlates. Both predictions are compared with the actual parking data collected in the city of Hradec Kralove (Czech Republic).
    Źródło:
    Acta Physica Polonica A; 2009, 116, 5; 779-782
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mapping of Copper Oxidation State Using High Pressure X-Ray Photoelectron Spectroscopy
    Autorzy:
    Kowalska, J.
    Gopinath, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1364054.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.05.Tp
    85.60.Gz
    73.40.-c
    78.66.-w
    Opis:
    The interaction of $O_2$ with polycrystalline foil of Cu, from ultra high vacuum to 1 mbar and up to 773 K has been investigated. The study were performed by using the high pressure X-ray photoelectron spectroscopy (electron spectroscopy for chemical analysis) ultraviolet photoelectron spectroscopy system. In this work the results of mapping copper oxidation states as a function of temperature at 1 mbar $O_2$ have been presented.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4; 1065-1066
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diffusive Propagation of Phonon Beams in Yttrium Aluminum Garnets Containing Substitutional Rare Earth Atoms
    Autorzy:
    Ivanov, S.
    Khazanov, E.
    Paszkiewicz, T.
    Taranov, A.
    Wilczyński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1872971.pdf
    Data publikacji:
    1995-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    63.20.Mt
    66.70.+f
    05.60.+w
    Opis:
    The diffusive maxima of phonon signals are studied for a number of solid solutions of rare earth atoms in yttrium aluminum garnets. The used exact formula for the diffusion constants allows for qualitative discussion of the obtained results. The established energy of phonons, forming the diffusive maximum of phonon signal of the temperature T$\text{}_{H}$ arriving at the bolometer, ranges from 3.2k$\text{}_{B}$T$\text{}_{H}$ to 4.2k$\text{}_{B}$T$\text{}_{H}$, which is in reasonable agreement with the existing estimations. The qualitative analysis allows us to estimate the contribution, made by the rare earth ions occupying the octahedral positions of the sixfold oxygen coordination, to the scattering of phonons due to lattice imperfections in yttrium aluminum garnets.
    Źródło:
    Acta Physica Polonica A; 1995, 87, 2; 381-386
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    AC Magnetic Properties of Vitroperm Based Composite Materials
    Autorzy:
    Kollár, P.
    Hegedüs, L.
    Füzer, J.
    Bureš, R.
    Fáberová, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1533956.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Tt
    81.05.Ni
    85.70.-w
    75.60.-d
    75.50.Bb
    Opis:
    The aim of this work was to investigate the influence of resin content on AC magnetic properties of Vitroperm 800-based composite material to extend possibilities for application of this kind of material at higher frequency (up to 100 kHz). The samples of composite material were prepared in the form of the ring with outer diameter of 25 mm, inner diameter of 18 mm and height approximately 3 mm. Powder mixtures were prepared from Vitroperm 800 in partial nanocrystalline state and commercial termoset resins by mechanical mixing. The AC magnetic properties (losses) at maximum induction up to 0.5 T were measured by MATS-2010SA loop tracer in frequency range 1-100 kHz. The specific resistivity of the material was measured by the van der Pauw method. The magnetic properties of the composite rings were compared with the properties of the material prepared from Fe based powder supported by Höganäs. It was found out that the total losses of the Vitroperm-based soft magnetic composite are more than 10 times lower (at 10 kHz) than that for Fe-based one.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 787-789
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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