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Wyszukujesz frazę "Włodarski, T." wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Algebra with a symplectic form
Autorzy:
Włodarski, T.
Powiązania:
https://bibliotekanauki.pl/articles/745910.pdf
Data publikacji:
1986
Wydawca:
Polskie Towarzystwo Matematyczne
Opis:
The article contains no abstract
Źródło:
Commentationes Mathematicae; 1986, 26, 2
0373-8299
Pojawia się w:
Commentationes Mathematicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Spatial variability of selected physicochemical parameters within peat deposits in small valley mire: a geostatistical approach
Autorzy:
Pawłowski, D.
Okupny, D.
Włodarski, W.
Zieliński, T.
Powiązania:
https://bibliotekanauki.pl/articles/94486.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
peat
geostatistics
organic matter
pH
spatial analysis
Opis:
Geostatistical methods for 2D and 3D modelling spatial variability of selected physicochemical properties of biogenic sediments were applied to a small valley mire in order to identify the processes that lead to the formation of various types of peat. A sequential Gaussian simulation was performed to reproduce the statistical distribution of the input data (pH and organic matter) and their semivariances, as well as to honouring of data values, yielding more ‘realistic’ models that show microscale spatial variability, despite the fact that the input sample cores were sparsely distributed in the X–Y space of the study area. The stratigraphy of peat deposits in the Ldzań mire shows a record of long-term evolution of water conditions, which is associated with the variability in water supply over time. Ldzań is a fen (a rheotrophic mire) with a through-flow of groundwater. Additionally, the vicinity of the Grabia River is marked by seasonal inundations of the southwest part of the mire and increased participation of mineral matter in the peat. In turn, the upper peat layers of some of the central part of Ldzań mire are rather spongy, and these peat-forming phytocoenoses probably formed during permanent waterlogging.
Źródło:
Geologos; 2014, 20, 4; 269-288
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Blue fluorescence of Ti3+ ions in Ti3+-doped, gamma-irradiated SrAl0.5Ta0.5O3:LaAlO3 crystals
Autorzy:
Kaczmarek, S.
Berkowski, M.
Tsuboi, T.
Wabia, M.
Włodarski, M.
Olesińska, W.
Wrońska, T.
Powiązania:
https://bibliotekanauki.pl/articles/148592.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
Ti3+ centers
Czochralski method
growth
absorption
emission
Opis:
Titanium-doped SrAl0.5Ta0.5O3: LaAlO3 (SAT:LA) perovskite solid solution single crystals were grown by the Czochralski method for two Ti concentrations: 1 wt.% (LSAT1) and 2 wt.% (LSAT2). It was stated that incorporation of Ti into SAT:LA crystal takes place in a non-uniform way. Ti3+ ions enter the crystal mainly in its conical part and mainly inside a thin (2-3 mm) layer within the crystal boundary. At room temperature, crystals from the conical part of the boule reveal strong absorption centered at about 529 nm for the case of LSAT1 single crystal while at about 451 and 651 nm for the case of LSAT2. Low temperature measurements have shown two absorption peaks centered at about 489 and 562 nm. Moreover, the 850 nm peak is clearly observed. The intensity of the above described absorption coefficient strongly depends on the dopant concentration and reaches even 80 cm-1. The above bands seem to be connected with non emitting Ti3+ centers. After g-irradiation, additional absorption is observed peaked at about 423 nm which gives two emission bands placed near 400 and 800 nm (375 nm excitation wavelength). They seem to be Ti3+ emissions coming from Ti3+ ions, occupying two different lattice octahedral positions one of which being octahedral (Al, Ta) site. Blue fluorescence is self-evident.
Źródło:
Nukleonika; 2003, 48, 1; 35-40
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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