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Wyszukujesz frazę "Szymański, G. M." wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    The effect of the concentration of the ionic liquid didecyldimethylammonium lactate on the retention and separation of pyrimidine bases
    Autorzy:
    Szymański, M.
    Zapart, J.
    Florek, G.
    Szymański, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/347003.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
    Tematy:
    ionic liquids
    reversed-phase high-performance liquid chromatography
    additives
    Opis:
    Ionic liquids (IL) are new materials with a wide spectrum of use. Being a variable combination of an organic cation and an organic or inorganic anion, their have controllable properties. The effect of the ionic liquid added to the mobile phase on the separation of uracil derivatives is studied and demonstrated in this paper. The ionic liquid used was didecyldimethylammonium lactate, which has an advantageous effect on the separation of the analytes studied. Pyrimidine bases which were used as the test compounds are characterized by alkaline properties due to which so-called peak tailing is observed during separation. A methanol/water mixture was used as the mobile phase in the chromatographic analyses. Optimum separations were obtained for 8% levels of the organic modifier. The best separations of the test isomers were obtained for 0.01% IL added to the mobile phase. The findings obtained are evidence that the use of ionic liquids in HPLC is an efficient method for the separation of polar compounds: the duration of the analysis is shorter and the resulting peaks are sharp and symmetrical.
    Źródło:
    Ars Separatoria Acta; 2012-2013, 9/10; 15-24
    1731-6340
    Pojawia się w:
    Ars Separatoria Acta
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of Large Vocabulary Continuous Speech Recognition for Polish
    Autorzy:
    Demenko, G.
    Szymański, M.
    Cecko, R.
    Kuśmierek, E.
    Lange, M.
    Wegner, K.
    Klessa, K.
    Owsianny, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490468.pdf
    Data publikacji:
    2012-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    43.72.-p
    43.72.+q
    Opis:
    In this study, the results of acoustic modeling used in a large vocabulary continuous speech recognition system are presented. The acoustic models have been developed with the use of a phonetically controlled large corpus of contemporary spoken Polish. Evaluation experiments showed that relatively good speech recognition results may be obtained with adequate training material, taking into account: (a) the presence of lexical stress; (b) speech styles (a variety of segmental and prosodic structures, various degrees of spontaneity of speech (spontaneous vs. read speech), pronunciation variants and dialects); (c) the influence of the sound level and background noises. The present large vocabulary continuous speech recognition evaluation results were obtained with Sclite assessment software. Moreover, the article delivers information about the speech corpus structure and contents and also a brief outline of the design and architecture of the automatic speech recognition system.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 1A; A-086-A-091
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optically Pumped Laser Action on Nitride Based Separate Confinement Heterostructures Grown along the (11¯20) Crystallographic Direction
    Autorzy:
    Teisseyre, H.
    Szymański, M.
    Khachapuridze, A.
    Skierbiszewski, C.
    Feduniewicz-Żmuda, A.
    Siekacz, M.
    Łucznik, B.
    Kamler, G.
    Kryśko, M.
    Suski, T.
    Perlin, P.
    Grzegory, I.
    Porowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047728.pdf
    Data publikacji:
    2007-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.55.Px
    78.45.+h
    78.66.Fd
    Opis:
    The intention of this work is to discuss and report on our research on nonpolar laser structures grown on bulk GaN crystal substrates along the (11¯20) nonpolar direction. The main advantages of such nonpolar structures are related to the elimination of the built-in electric fields present in commonly used systems grown along the polar (0001) axis of nitride crystals. We demonstrated the optically pumped laser action on separate confinement heterostructures. Laser action is clearly shown by spontaneous emission saturation, abrupt line narrowing, and strong transversal electric polarization of output light. The lasing threshold was reached at an excitation power density of 260 kW/cm$\text{}^{2}$ for a 700μm long cavity (at room temperature).
    Źródło:
    Acta Physica Polonica A; 2007, 112, 2; 467-472
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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