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Wyszukujesz frazę "Lim, K. M." wg kryterium: Autor

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    Wyświetlanie 1-6 z 6
    Tytuł:
    Parameters of an Unique Condenson State in the Structure of the rm $In_4$ $Se_3$ Crystal
    Autorzy:
    Sznajder, M.
    Lim, Y.
    Glukhov, K.
    Kharkhalis, L.
    Bercha, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1410037.pdf
    Data publikacji:
    2012-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.15.Mb
    71.20.-b
    71.20.Nr
    71.38.-k
    Opis:
    Based upon the ab initio band structure calculations results the dispersion law parameters of charge carriers of the orthorhombic $In_4$ $Se_3$ semiconductor as well as of its Sn- and Te-doped compounds were calculated. This allowed to estimate parameters of the electron condenson states in those compounds.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 6; 1115-1117
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oxidation Behavior of Steel with Cr Content and Water Flow Rate
    Autorzy:
    Kim, D.-J.
    Kim, K. M.
    Shin, J. H.
    Cheong, Y. M.
    Lee, E. H.
    Lee, G. G.
    Kim, S. W.
    Kim, H. P.
    Choi, M. J.
    Lim, Y. S.
    Hwang, S. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/351548.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    steel
    flow accelerated corrosion
    Cr content
    flow rate
    surface oxides
    Opis:
    Fast water flow facilitates ferrous ion transport leading to flow accelerated corrosion (FAC) of carbon steel and the possibility of a large accident through a failure of a secondary pipe in a nuclear power plant. Ion transport is directly linked to oxide properties such as the thickness, chemical composition and porosity. This work deals with a precise observation of the cross section of the corroded specimen focusing on an oxide passivity and its thickness using SEM (scanning electron microscope) and TEM (transmission electron microscope) as well as an apparent weight loss and a surface observation for the specimens corroded using a rotating cylindrical electrode autoclave system in pure water of pH 7 at 150°C having dissolved oxygen below 1 ppb within a flow rate range of 0 to 10 m/s. The Cr content in steel was changed from 0.02 to 2.4 wt%. Increasing the Cr content in the alloy, the FAC rate and oxide thickness decreased. The oxide porosity tends to decrease with the Cr content and immersion time owing to the development of Cr containing oxide. The oxidation behavior is not changed with the immersion time.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2B; 1383-1387
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Incorporation of Resonators Into Plenum Window
    Autorzy:
    Lee, H. M.
    Haris, A.
    Lim, K. M.
    Xie, J.
    Lee, H. P.
    Powiązania:
    https://bibliotekanauki.pl/articles/176744.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    plenum window
    Helmholtz resonators
    noise pollution
    ventilation
    Opis:
    A plenum window with incorporation of Helmholtz resonators in between two glass panes was tested in a reverberation room. The effects of jagged flap on reducing strength of diffracted sound was also investigated in the present studies where white, traffic and construction noises were examined Turing each set of experiment. When the noise source was located at the central line of the plenum window, the plenum window with Helmholtz resonators was able to mitigate 8.5 dBA, 8.9 dBA and 8.2 dBA of white, traffic and construction noises, respectively, compared with the case of without window. These amounts of noises that attenuated by the plenum window were slightly higher than the case where noise source was diverged 30° away from the plenum window. The effects of jagged flaps on the acoustical performance of the plenum window were negligible. The Helmholtz resonators had the best performance in the frequency region between 900 Hz to 1300 Hz where in this frequency range, the plenum window with Helmholtz resonators was able to attenuate additional 1.7 dBA, 1.9 dBA and 1.6 dBA of white, traffic and construction noises, respectively, compared with the case of without resonators.
    Źródło:
    Archives of Acoustics; 2018, 43, 4; 739-746
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improved Light Conversion Efficiency Of Dye-Sensitized Solar Cell By Dispersing Submicron-Sized Granules Into The Nano-Sized TiO2 Layer
    Poprawa efektywności konwersji światła ogniw słonecznych uczulonych barwnikiem poprzez rozproszenie submikronowych granulek w warstwie nanocząstek TiO2
    Autorzy:
    Song, S. A.
    Lim, M. J.
    Jung, K. Y.
    So, W.-W.
    Moon, S.-J.
    Powiązania:
    https://bibliotekanauki.pl/articles/353347.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    titania nanoparticles
    granules
    dye-sensitized solar cell
    light scattering
    spray pyrolysis
    nanocząsteczki tytanu
    granulat
    uczulone barwnikiem ogniwa słoneczne
    rozpraszanie światła
    Opis:
    In this work, TiO2 nanoparticles and submicron-sized granules were synthesized by a hydrothermal method and spray pyrolysis, respectively. Submicron-sized granules were dispersed into the nano-sized TiO2 layer to improve the light conversion efficiency. Granules showed better light scattering, but lower in terms of the dye-loading quantity and recombination resistance compared with nanoparticles. Consequently, the nano-sized TiO2 layer had higher cell efficiency than the granulized TiO2 layer. When dispersed granules into the nanoparticle layer, the light scattering was enhanced without the loss of dye-loading quantities. The dispersion of granulized TiO2 led to increase the cell efficiency up to 6.51%, which was about 5.2 % higher than that of the electrode consisting of only TiO2 nanoparticles. Finally, the optimal hydrothermal temperature and dispersing quantity of granules were found to be 200°C and 20 wt%, respectively.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 2B; 1467-1471
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication of High-Strength Gray Cast Iron Using Permanent Magnet Scrap
    Autorzy:
    Park, S.-Y.
    Kim, J. H.
    Seo, S. J.
    On, J. S.
    Lim, K. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/352204.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    gray cast iron
    rare earth element
    Nd-Fe-B magnet scrap
    graphite formation
    microstructure
    Opis:
    In this study, we have developed the manufacturing technology for high strength gray cast irons by using the spent permanent magnet scraps. The cast specimen inoculated by using a spent magnet scraps showed the excellent tensile strength up to 306MPa. This tensile strength value is 50MPa higher than that of the specimen cast without inoculation, and is similar to that of the specimen inoculated by using the expensive misch-metal. These superior mechanical properties are attributed to complex sulfides created during solidification that promote the formation and growth of Type-A graphite. It is therefore concluded that spent magnets scrap can provide an efficient and cost-effective inoculation agent for the fabrication of high-performance gray cast iron.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2B; 1113-1117
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Demarcation energy properties of regenerated fiber Bragg grating sensors in few-mode fibers
    Autorzy:
    Mohd Nazal, N. A.
    Lai, M.-H.
    Lim, K.-S.
    Gunawardena, D. S.
    Chong, W.-Y.
    Yang, H.-Z.
    Ahmad, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/174756.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    regenerated fiber Bragg grating
    thermal regeneration
    thermal decay
    few-mode fibers
    Opis:
    In this work, thermal regeneration of fiber Bragg gratings inscribed in single-mode fibers, two-mode step index fibers and four-mode step index fibers is performed, where the single-mode fibers are used as the reference in the analysis. Specifically, we investigate the behavior of the thermal decay, recovery and eventually the permanent erasure of the gratings in the temperature range from 25 to 1300°C. In the domain of demarcation energy, the thermal responses of the gratings can be normalized and they share similar characteristic curves despite the different temperature ramping rates used in the annealing treatment. It is found that the demarcation energy at the regeneration point and the attempt-to-escape frequency for each grating can be associated with the confinement factors of the fibers. The finding in this work has provided a new insight in the manufacture of regenerated fiber Bragg grating sensors by using few-mode fibers for multiparameter sensing in high temperature environments.
    Źródło:
    Optica Applicata; 2018, 48, 2; 263-271
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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