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    Wyświetlanie 1-7 z 7
    Tytuł:
    Thermal Analysis On The Kinetics Of Magnesium-Aluminum Layered Double Hydroxides In Different Heating Rates
    Analiza termiczna kinetyki rozkładu warstwowego podwójnego wodorotlenku magnezu aluminium przy różnych szybkościach grzania
    Autorzy:
    Hongbo, Y.
    Meiling, C.
    Xu, W.
    Hong, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/351862.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    layered double hydroxides
    thermal analysis
    kinetics
    warstwowy podwójny wodorotlenek
    analiza termiczna
    kinetyka
    Opis:
    The thermal decomposition of magnesium-aluminum layered double hydroxides (LDHs) was investigated by thermogravimetry analysis and differential scanning calorimetry (DSC) methods in argon environment. The influence of heating rates (including 2.5, 5, 10, 15 and 20K/min) on the thermal behavior of LDHs was revealed. By the methods of Kissinger and Flynn-Wall-Ozawa, the thermal kinetic parameters of activation energy and pre-exponential factor for the exothermic processes under non-isothermal conditions were calculated using the analysis of corresponding DSC curves.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1357-1359
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis Of Magnesium-Aluminum Layered Double Hydroxides By Mechanochemical Method And Its Solid State Reaction Kinetics
    Mechaniczno-chemiczna synteza warstwowego podwójnego wodorotlenku magnezu aluminium i kinetyka reakcji w stanie stałym
    Autorzy:
    Hongbo, Y.
    Meiling, C.
    Xiuhui, W.
    Hong, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/351963.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    layered double hydroxides
    mechanochemical method
    kinetic
    warstwowy podwójny wodorotlenek
    metoda mechaniczno-chemiczna
    kinetyka
    Opis:
    A mechanochemical method is developed in preparing magnesium-aluminum-layered double hydroxides (MgAl-LDHs). This approach includes activation process and diffusion process. In order to verify the LDHs structure and study the reaction kinetics, X-ray diffraction (XRD) patterns, inductively coupled plasma(ICP) and physical adsorption instrument were characterized. The results show that activation time can change the surface of particles and affect the reaction grade. During the diffusion process, reaction time is the most important factor. The reaction energy (ΔQ) was calculated that is 6kJ/mol.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1455-1457
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Joining Of Green Body And Dense Substrate For Indium Tin Oxide Under Uniaxial Pressure In An Open Condition
    Łączenie zielonej masy i gęstego podłoża z tlenku cyny indu w warunkach jednoosiowego ściskania w stanie otwartym
    Autorzy:
    Moon, G.-S.
    Chung, T.-J.
    Yang, S. H.
    Hong, G.-S.
    Oh, K.-S.
    Powiązania:
    https://bibliotekanauki.pl/articles/355654.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    transparent conducting oxide
    indium tin oxide
    green body
    joining
    tlenek indu
    zielona masa
    łączenie
    Opis:
    The green body and dense substrate of indium tin oxide was joined by uniaxially pressing at 0.3 MPa at 1300°C to test the restoring of the eroded part of transparent conducting oxide target. The green body was sintered to 98% of theoretical density under the suppression of shrinkage along the boundary below 5%. The boundary between two parts was free of pore but could be recognized from the difference in grain sizes. The joined part had the virtually same density with the substrate, but the grain size was less than one fifth compared with that of substrate.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1209-1212
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Weak uniform normal structure and iterative fixed points of nonexpansive mappings
    Autorzy:
    Domínguez Benavides, T.
    López Acedo, G.
    Xu, Hong
    Powiązania:
    https://bibliotekanauki.pl/articles/967052.pdf
    Data publikacji:
    1995
    Wydawca:
    Polska Akademia Nauk. Instytut Matematyczny PAN
    Tematy:
    nonexpansive mapping
    iterative fixed point
    geometrical coefficients of Banach spaces
    James' quasi-reflexive space
    weak uniform normal structure
    Opis:
    This paper is concerned with weak uniform normal structure and iterative fixed points of nonexpansive mappings. Precisely, in Section 1, we show that the geometrical coefficient β(X) for a Banach space X recently introduced by Jimenez-Melado [8] is exactly the weakly convergent sequence coefficient WCS(X) introduced by Bynum [1] in 1980. We then show in Section 2 that all kinds of James' quasi-reflexive spaces have weak uniform normal structure. Finally, in Section 3, we show that in a space X with weak uniform normal structure, every nonexpansive self-mapping defined on a weakly sequentially compact convex subset of X admits an iterative fixed point.
    Źródło:
    Colloquium Mathematicum; 1995, 68, 1; 17-23
    0010-1354
    Pojawia się w:
    Colloquium Mathematicum
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reduction of Thermal Conductivity Through Complex Microstructure by Dispersion of Carbon Nanofiber in p-Type Bi0.5Sb1.5Te3 Alloys
    Autorzy:
    Sharief, P.
    Madavali, B.
    Sohn, Y.
    Han, J. H.
    Song, G.
    Hong, S. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049341.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bismuth telluride
    carbon nano fiber
    grain size
    Thermal conductivity
    ZT
    Opis:
    The influence of nano dispersion on the thermoelectric properties of Bi2Te3 was actively investigating to wide-spread thermoelectric applications. Herein this report, we have systematically controlled the microstructure of Bi0.5Sb1.5Te3 (BST) alloys through the incorporation of carbon nanofiber (CNF), and studied their effect on thermoelectric properties, and mechanical properties. The BST/x-CNF (x-0, 0.05, 0.1, 0.2 wt.%) composites powder was fabricated using high energy ball milling, and subsequently consolidated the powder using spark plasma sintering. The identification of CNF in bulk composites was analyzed in Raman spectroscopy and corresponding CNF peaks were recognized. The BST matrix grain size was greatly reduced with CNF dispersion and consistently decreased along CNF percentage. The electrical conductivity was reduced and Seebeck coefficient varied in small-scale by embedding CNF. The thermal conductivity was progressively diminished, obtained lattice thermal conductivity was lowest compared to bare sample due to induced phonon scattering at interfaces of secondary phases as well as highly dense fine grain boundaries. The peak ZT of 0.95 achieved for 0.1 wt.% dispersed BST/CNF composites. The Vickers hardness value of 101.8 Hv was obtained for the BST/CNF composites.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 3; 803-808
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical investigation of vanadium oxide film with surface microstructure
    Autorzy:
    Hong, W.
    Wang, Z.
    Chen, Q.
    Sheng, C.
    Gu, G.
    Luo, P.
    Xie, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/174416.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    vanadium oxide
    VO2
    film
    surface microstructure
    photonic band edge
    dispersion material
    Opis:
    This paper presents a method to design a surface microstructure of vanadium oxide to enhance optical absorption. This method, using a density of eigenfrequency, can be calculated by a planar wave expand method, to indicate the absorption efficiency of a dispersion material, which can be used as an approach method for further design. Based on this, a nanostructure-based vanadium oxide film is designed and simulated to validate this method. The simulation results show that the tendency of density of eigenfrequency is corresponding to the tendency of optical absorption enhancement. Moreover, this structure can achieve high optical broadband absorption when the material dispersion is considered. High optical absorption enhancement can be achieved by adjusting the geometrical parameters; our maximum overall enhancement absorption ratio was 31.84% at the metal phase, which can be attributed to the enhancement effect of a photonic band edge.
    Źródło:
    Optica Applicata; 2017, 47, 4; 601-609
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hemifacial asymmetries in age perception: the left cheek looks older for females, but not males
    Autorzy:
    Lindell, Annukka K
    Cianchetta, Rhiannon O
    Azim, Sana M
    Freeman, Cody G
    de Oliveira, Nicole C
    Saban, Sakire
    Messina, Julia L
    Wilson, Kira Elise
    Egan, Alanna
    Caspar, Megan D
    Grey, Emma J
    McDonald, Bryce A
    Croxford, Kylie N
    Bui, Thu Trang
    Aiello, Ashley A
    Heywood-Smith, Victoria M
    Kidd, Andrew J
    Stanley, Shenae C
    Wakeling, Alarna
    Hoggan, Stephanie A.L
    Morriss, Ashleigh S
    Trinh, Thi Phuong Mai
    Thai-Nguyen, Hong
    Fonte, Melissa
    Agolli, Franceska
    Powiązania:
    https://bibliotekanauki.pl/articles/2106020.pdf
    Data publikacji:
    2019-12-18
    Wydawca:
    Fundacja Edukacji Medycznej, Promocji Zdrowia, Sztuki i Kultury Ars Medica
    Tematy:
    emotion
    asymmetry
    hemisphere
    laterality
    age
    Opis:
    The left hemiface expresses emotion more intensely than the right. Because emotional expressions contract the facial muscles and wrinkle the skin, theoretically the left hemiface’s greater expressivity should prompt more pronounced expression lines and wrinkles on the left than right side of the face. As wrinkles are the most salient age cue, we investigated whether the left hemiface consequently appears older than the right. Two hundred and sixty participants (F=148; M=112) viewed booklets containing pairs of left-left and right-right chimeric faces of eight models (M=F). For each trial participants were asked to make a two alternative forced choice response indicating which image looked older. Results confirmed a left cheek bias, with participants more likely to select left-left than right-right chimeras. Whilst participant gender did not influence perceptions, model gender predicted cheek selections: responses to female models drive the overall left cheek bias. The left cheek (56.8%) appeared older than the right cheek (43.2%) for female models, whereas there was little difference in perceived age between male models' left (50.8%) and right (49.2%) cheeks. Given that youth influences perceptions of female beauty, these findings complement previous research and offer a potential explanation for why the left side of females’ faces are judged less attractive: the right cheek appears younger.
    Źródło:
    Acta Neuropsychologica; 2019, 17(4); 417-426
    1730-7503
    2084-4298
    Pojawia się w:
    Acta Neuropsychologica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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