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    Wyświetlanie 1-4 z 4
    Tytuł:
    Finite Element Analysis Of Adolescent Mandible Fracture Occurring During Accidents
    Autorzy:
    Żmudzki, J.
    Chladek, G.
    Panek, K.
    Lipiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/352291.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mandible fracture
    disocclusion state
    finite element analysis
    critical blow force
    Opis:
    The paper aims was assessing risks of mandible fractures consequent to impacts or sport accidents. The role of the structural stiffness of mandible, related to disocclusion state, was evaluated using the finite element method. It has been assumed, that the quasi-static stress field, due to distributed forces developed during accidents, could explain the common types of mandibular fractures. Mandibular condyles were supposed jammed in the maxillary fossae. The force of 700 N, simulating an impact on mandible, has been sequentially applied in three distinct areas: centrally, at canine zone and at the mandibular angle. Clinically most frequent fractures of mandible were recognized through the analysis of maximal principal stress/strain fields. It has been shown that mandibular fracture during accidents can be analyzed at satisfactory level using linear quasi-static models for designing protections.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 1; 65-72
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Libyan Period in Egypt. Historical and Cultural Studies into the 21st–24th Dynasties: Proceedings of a Conference at Leiden University, 25–27 October 2007
    Autorzy:
    Lipiński, Edward
    Broekman, G.P.F.
    Demarée, R.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/707567.pdf
    Data publikacji:
    2011
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Źródło:
    Rocznik Orientalistyczny; 2011, 2
    0080-3545
    Pojawia się w:
    Rocznik Orientalistyczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Black Silicon Obtained in Two-Step Short Wet Etching as a Texture for Silicon Solar Cells - Surface Microstructure and Optical Properties Studies
    Autorzy:
    Kulesza-Matlak, G.
    Gawlińska, K.
    Starowicz, Z.
    Sypień, A.
    Drabczyk, K.
    Drabczyk, B.
    Lipiński, M.
    Zięba, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/352242.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    black silicon
    low temperature texturization
    silicon nanowire
    solar cells
    multicrystalline silicon
    Opis:
    In this study a two-step short wet etching was implemented for the black silicon formation. The proposed structure consists of two steps. The first step: wet acidic etched pits-like morphology with a quite new solution of lowering the texturization temperature and second step: wires structure obtained by a metal assisted etching (MAE). The temperature of the process was chosen due to surface development control and surface defects limitation during texturing process. This allowed to maintain better minority carrier lifetime compared to etching in ambient temperature. On the top of the acidic texture the wires were formed with optimized height of 350 nm. The effective reflectance of presented black silicon structure in the wavelength range of 300-1100 nm was equal to 3.65%.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 2; 1009-1017
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studying of Perovskite Nanoparticles in PMMA Matrix Used as Light Converter for Silicon Solar Cell
    Autorzy:
    Lipiński, M.
    Socha, R. P.
    Kędra, A.
    Gawlińska, K.
    Kulesza-Matlak, G.
    Major, Ł.
    Drabczyk, K.
    Łaba, K.
    Starowicz, Z.
    Gwóźdź, K.
    Góral, A.
    Popko, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/356850.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    perovskite nanoparticles
    light converters
    solar cells
    solar energy materials
    Opis:
    The nanoparticles of CH3NH3PbBr3 hybrid perovskites were synthesized. These perovskite nanoparticles we embedded in polymethyl methacrylate (PMMA) in order to obtain the composite, which we used as light converter for silicon solar cells. It was shown that the composite emit the light with the intensity maximum at about 527 nm when exited by a short wavelength (300÷450 nm) of light. The silicon solar cells were used to examine the effect of down-conversion (DC) process by perovskite nanoparticles embedded in PMMA. For experiments, two groups of monocrystalline silicon solar cells were used. The first one included the solar cells without surface texturization and antireflection coating. The second one included the commercial cells with surface texturization and antireflection coating. In every series of the cells one part of the cells were covered by composite (CH3NH3PbBr3 in PMMA) layer and second part of cells by pure PMMA for comparison. It was shown that External Quantum Efficiency EQE of the photovoltaic cells covered by composite (CH3NH3PbBr3 in PMMA) layer was improved in both group of the cells but unfortunately the Internal Quantum Efficiency was reduced. This reduction was caused by high absorption of the short wavelength light and reabsorption of the luminescence light. Therefore, the CH3NH3PbBr3 perovskite nanoparticles embedded in PMMA matrix were unable to increase silicon solar cell efficiency in the tested systems.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 3; 1733-1739
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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