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Wyszukujesz frazę "Nikolov, I." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Dispersion Properties of Optical Polymers
    Autorzy:
    Sultanova, N.
    Kasarova, S.
    Nikolov, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1795587.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.70.Jk
    78.20.Ci
    78.30.Jw
    Opis:
    In this report dispersion properties of different types of optical polymers are discussed on the base of measured refractive indices and the Cauchy-Schott approximation. A number of dispersion curves are presented in the visible and near infrared spectral regions between 400 and 1060 nm. A comparison with some optical glasses with similar refraction is performed. The nonlinear dependence of dn/dλ of polymer materials and test glasses on the wavelength is calculated and analyzed. Normalized dispersion curves at 550 nm and 880 nm are presented to illustrate better the dispersion of the polymers in the considered spectral regions, separately. Abbe numbers are calculated to exhibit the mean and partial dispersion.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 585-587
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sintering Conditions for $Al_2(WO_4)_3$ High-Dense Ceramic
    Autorzy:
    Yordanova, A.
    Koseva, I.
    Nikolov, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1292700.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Je
    81.05.Mh
    Opis:
    $Al_2(WO_4)_3$ nanoparticles with average particles size of 20, 90 and 200 nm are sintered by two methods: cold pressing with additional sintering at different temperatures and time durations and hot pressure sintering. Density, particles size dimensions and anisometricity are tested. The results show that optimal initial nanosized dimensions and an optimal pressing condition are needed to obtain compact ceramic. Hot pressure method gives possibilities of a ceramic with a density in order of 99.8% to be received, which possesses some level of transparency.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 567-570
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ozone decomposition on ZnO catalysts obtained from different precursors
    Autorzy:
    Milenova, Katya I.
    Nikolov, Penko M.
    Kasabova, Nikoleta A.
    Avramova, Ivalina A.
    Powiązania:
    https://bibliotekanauki.pl/articles/778353.pdf
    Data publikacji:
    2014
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    ozone decomposition
    zinc oxide catalyst
    manganese doping
    copper doping
    nanosize
    Opis:
    Kinetic investigations for ozone conversion on three different series of zinc oxide catalysts, containing pure ZnO and doped with Mn or Cu one with dopant content less than 1 wt.% were carried out. The different samples were obtained from carbonate, nitrate and acetate precursors. The as prepared catalysts were characterized by AAS, XRD, IR, EPR and BET methods. The mean size of the crystallites determined by XRD data is in the range 27÷68 nm. The presence of Mn2+ and Cu2+ ions into the ZnO matrix was established by EPR. The ozone decomposition was investigated for 30÷75°C temperature range. The zinc carbonate precursor samples show highest activity, while the nitrate precursor ones show lowest activity toward reaction decomposition of ozone in the whole temperature range. At 75°C two of the catalyst, obtained from carbonate precursor - ZnO and CuZnO show 100% conversion.
    Źródło:
    Polish Journal of Chemical Technology; 2014, 16, 4; 55-59
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microwave radiometry in monitoring and emergency mapping of water seepage and dangerously high groundwaters
    Autorzy:
    Shutko, A. M.
    Haldin, A.
    Krapivin, V.
    Novichikhin, E.
    Sidorov, I.
    Tishchenko, Y.
    Haarbrink, R.
    Georgiev, G.
    Kancheva, R.
    Nikolov, H.
    Coleman, T.
    Archer, F.
    Pampaloni, P.
    Paloscia, S.
    Krissilov, A.
    Camps Carmona, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/307666.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Łączności - Państwowy Instytut Badawczy
    Tematy:
    remote sensing
    passive microwave radiometry
    soil moisture
    water seepage
    risk assessment
    Opis:
    Detailed and geo-referenced maps identifying the locations of saturated and dry levees can be produced using microwave radiometric measurements from a light aircraft or helicopter, and integrated with GPS for positioning and orientation. The development of synergetic remote sensing technology for raised groundwater and seepage detection by the joint use of microwave and optical data along with GIS databases is an effective and most contemporary way of supporting risk assessment and facilitating disaster prevention and management. In this paper we present a remote sensing microwave technology for monitoring and detection of areas of water seepage through irrigation constructions, levees and dykes as well as for revealing areas with dangerously high groundwater level. The possibility for emergency response mapping, integrated with GPS and GIS data, facilitates the risk assessment and management services. The passive microwave radiometry (PMR) is based on spectral measurements in the millimetre to decimetre range of wavelengths. Compared to other remote sensing techniques, such as colour and infrared photography, thermal images and lidar, PMR is the only technology taking measurements under the earth's surface and therefore is very well suited for water seepage and underground water monitoring in a fast and reliable way.
    Źródło:
    Journal of Telecommunications and Information Technology; 2007, 1; 76-82
    1509-4553
    1899-8852
    Pojawia się w:
    Journal of Telecommunications and Information Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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