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    Wyświetlanie 1-4 z 4
    Tytuł:
    Luminescence Properties of Europium in Sorbates of the Complexes with Naphthoic Acid on Zeolite
    Autorzy:
    Beltyukova, S. V.
    Egorova, A. V.
    Tselic, E. I.
    Teslyuk, O. I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2010950.pdf
    Data publikacji:
    1999-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.55.Cr
    Opis:
    A study of luminescence properties of sorbates of the europium(III) complexes with naphthoic acid and 1,10-phenanthroline on the zeolite of CaA-type that may be used as luminophores of the red color luminosity, has been performed. It was shown that the highest luminescence intensity in sorbate is observed upon the preliminary sorption of Eu(III) ion on zeolite following the treatment of naphthoic acid and 1,10-phenanthroline. The stability of sorbates to the temperature action was established (100°C, 2 h).
    Źródło:
    Acta Physica Polonica A; 1999, 95, 6; 977-982
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    EPR Spectroscopy of the Mn^{2+} and Cu^{2+} Centres in Lithium and Potassium-Lithium Tetraborate Glasses
    Autorzy:
    Padlyak, B.
    Wojtowicz, W.
    Adamiv, V.
    Burak, Ya.
    Teslyuk, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1550290.pdf
    Data publikacji:
    2010-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.30.Fc
    81.05.Kf
    Opis:
    The electron paramagnetic resonance spectra of the glasses with $Li_{2}B_{4}O_{7}$ and $KLiB_{4}O_{7}$ compositions doped with Mn and Cu were investigated. On the basis of obtained EPR spectra analysis it was shown that the Mn and Cu impurities are incorporated into the glass network as $Mn^{2+} (\text{}^{6}S_{5//2}, 3d^{5})$ and $Cu^{2+} (\text{}^{2}D_{5//2}, 3d^{9})$ ions. The $Mn^{2+}$ EPR spectra in the glasses with $Li_{2}B_{4}O_{7}$ and $KLiB_{4}O_{7}$ compositions are characterised by the following parameters, measured at T = 300 K: isotropic g-factor ($g_\text{iso}$ = 2.00 ± 0.05), isotropic hyperfine constant ($A_\text{iso}$ = (8.65 ± 0.05) mT) and peak-to-peak linewidth of hyperfine components $ΔB_{pp}$ = (3.50 ± 0.05) mT. The $Cu^{2+}$ EPR spectra in the glasses with $Li_{2}B_{4}O_{7}$ and $KLiB_{4}O_{7}$ compositions, registered at T = 300 K are characterised by the same g-values ($g_∥$ = 2.34 ± 0.05, $g_⊥$ = 2.06 ± 0.05) and peak-to-peak line width of hyperfine components ($ΔB_{pp}^{∥}$ = (5.11 ± 0.05) mT, $ΔB_{pp}^{⊥}$ = (1.80 ± 0.05) mT), whereas anisotropic hyperfine constants show some differences ($A_{∥}$ = (14.28 ± 0.05) mT, $A_{⊥}$ = (2.34 ± 0.05) mT for glass with $Li_{2}B_{4}O_{7}$ composition and $A_{∥}$ = (14.21 ± 0.05) mT, $A_{⊥}$ = (2.55 ± 0.05) mT for glass with $KLiB_{4}O_{7}$ composition). The possible local structure of the $Mn^{2+}$ and $Cu^{2+}$ centres in the lithium and potassium-lithium tetraborate glass network has been considered.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 1; 122-125
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    EPR spectroscopy of Cu2+ and Mn2+ in borate glasses
    Autorzy:
    Drzewiecki, A.
    Padlyak, B.
    Adamiv, V.
    Burak, Y.
    Teslyuk, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/147654.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    borate glasses
    Cu2+ paramagnetic centre
    electron paramagnetic resonance (EPR) spectroscopy
    hyperfine structure
    Mn2+ paramagnetic centre
    Opis:
    Electron paramagnetic resonance (EPR) spectra of the CaB4O7 and LiCaBO3 glasses containing 0.5 and 1.0 mol.% CuO and MnO2 impurity compounds were investigated at room temperature. The glasses with CaB4O7:Cu, LiCaBO3:Cu, CaB4O7:Mn and LiCaBO3:Mn compositions were produced from the corresponding polycrystalline compounds using standard glass synthesis and technological conditions developed by the authors. The EPR spectral parameters of the Cu2+ and Mn2+ centres in both glasses containing 0.5 and 1.0 mol.% CuO and MnO2 doping oxides were determined. Analysis of EPR spectral parameters shows that Cu impurity is incorporated into the CaB4O7 and LiCaBO3 glass network as isolated Cu2+ (3d9, 2D5/2) paramagnetic ions. The Cu2+ ions occupy Ca(Li) sites of the borate glass network coordinated by six O2− anions with geometry of elongated octahedron (D4h symmetry) due to the Jahn- -Teller effect. The EPR spectra of the Mn-doped CaB4O7 and LiCaBO3 glasses are virtually identical and typical of all oxide glasses activated with Mn2+ (3d5, 6S5/2) ions. Observed EPR spectra in the Mn-doped glasses were attributed to isolated Mn2+ (1) centres (geff ≅ 4.3) in octahedral Ca(Li) sites with a strong (fully) rhombic distortion, isolated Mn2+ (2) centres (geff ≅ 2.0) in octahedral Ca(Li) sites with nearly cubic local symmetry as well as pairs and small clusters of the Mn2+ ions, coupled by magnetic dipolar and exchange interactions. On the basis of the obtained results and analysis of referenced data, the local structure of the Cu2+ and Mn2+ centres in the borate glasses have been proposed.
    Źródło:
    Nukleonika; 2013, 58, 3; 379-385
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of intelligent component of hierarchical control system
    Autorzy:
    Tsmots, I.
    Medykovskyy, M.
    Skorokhoda, A.
    Teslyuk, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/410845.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Oddział w Lublinie PAN
    Tematy:
    design
    energy efficiency
    intellectualization of control systems
    assessment
    prediction
    Opis:
    One of the main tasks of modern hierarchical systems management are integration of technological, organizational and economic management functions and processes. Another important task is creation of unified information space with accurate, complete and current information. Efficient hierarchical systems management requires intelligent processing of large amounts of heterogeneous information. It is appropriate to process information via intelligent components that are built using artificial neural networks. Strategic information about macroenvironments, microenvironments and internal environments are the input data for intelligent components of upper management levels. Intelligent components may solve different tasks which could have features like: large amount of data, data diversity (quantitative, qualitative, text), contradiction and incomplete data, consistency and high intensity of incoming data, high computing amount with dominance of computing operations over logical operations, recursions and regularity of data processing using neural network algorithms, continuous complications of processing algorithms and increasing requirements for results accuracy, possibility to process data in parallel. The method of synchronized spatiotemporal mapping algorithms for intelligent operation component that provides synchronization of data flow intensity with computing intensity (hardware implementation) and takes into account the processor architecture (software implementation) has been designed. It has been proposed to use following principles: conveyor and spatial parallelism in data processing, modularity, specialization, uniformity and regularity of the structure, programmability architecture. during design of intelligent hardware components. Evaluation of structure of intelligence hardware components carried out using test equipment efficiency. Equipment efficiency takes into account number of interface outputs and number of interneuron connections. At the next step it links performance costs of equipment and evaluates elements by device performance. The method for designing of intelligent component management system that uses synchronized spatio-temporal mapping algorithm has been described. Current method takes into account the components, the requirements of the specific application and provides implementation of intelligent components with high efficiency.
    Źródło:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2016, 5, 2; 3-10
    2084-5715
    Pojawia się w:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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