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Wyszukujesz frazę "Choi, In Young" wg kryterium: Autor

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Remotely measuring the hydrogen gas by using portable Raman lidar system
    Autorzy:
    Choi, In Young
    Baik, Sung Hoon
    Choi, Young Soo
    Powiązania:
    https://bibliotekanauki.pl/articles/1835765.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Raman lidar
    photon counter
    hydrogen gas
    remote gas detection
    Opis:
    A Raman lidar system is able to detect the range of gas distribution and measure the hydrogen gas concentration remotely. This paper discusses the development of a photon counting Raman lidar system for remotely measuring the hydrogen gas concentration. To verify the developed photon counting Raman lidar system, experiments were carried out in outdoor conditions. As the results indicate, the developed photon counting Raman lidar system is possible to measure 0.66 to 100 vol% hydrogen gas concentrations at a distance of 30 m. In addition, the measuring average error measured 0.54% and the standard deviation is 2.42% at a distance of 30 m.
    Źródło:
    Optica Applicata; 2021, 51, 1; 37-49
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    FERMENTED ORIENTAL MEDICINAL INSECT EXTRACT HAS A SYNERGISTIC EFFECT ON INHIBITING TGF-ß1- OR H2O2-INDUCED HEPATIC FIBROGENESIS IN LX-2 AND HEPG2 CELLS
    Autorzy:
    Choo, Young-Moo
    Choi, Young-Ji
    Park, In-Sun
    Son, Yu-Kyog
    You, Kang-Yeol
    Kim, Jiyoung
    Powiązania:
    https://bibliotekanauki.pl/articles/895380.pdf
    Data publikacji:
    2019-06-28
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 3; 599-603
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microstructural and Mechanical Characteristics of Non-Equiatomic High Entropy Alloy FeMnCoCr Prepared by Spark Plasma Sintering
    Autorzy:
    Seo, Namhyuk
    Jeon, Junhyub
    Choi, Seunggyu
    Moon, Young Hoon
    Shon, In-Jin
    Lee, Seok-Jae
    Powiązania:
    https://bibliotekanauki.pl/articles/354220.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    non-equiatomic high entropy alloys
    phase stability
    heat treatment
    microstructural characteristics
    Opis:
    In this study, a non-equiatomic high entropy alloy was fabricated using the spark plasma sintering method, and its microstructural features and mechanical properties were investigated. The chemical composition of FeMnCoCr was determined by using the entropy calculation related to the design of high entropy alloys. A bulk sample with the same composition was also prepared using the conventional metallurgical processes of casting and hot rolling. The microstructures of the samples fabricated by these different processes were compared by microscope observation, and a quantitative phase analysis was carried out using FE-SEM. Hardness measurement was used to evaluate mechanical properties. Particular attention was paid to microstructural changes due to heat treatment, which was analyzed by considering how austenite stability is affected by grain refinement.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 3; 1005-1009
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of TiC Addition on Strain-Induced Martensite Transformation and Mechanical Properties of Nanocrystalline Fe-Mn Alloy Fabricated by Spark Plasma Sintering
    Autorzy:
    Jeon, Junhyub
    Choi, Seunggyu
    Seo, Namhyuk
    Moon, Young Hoon
    Shon, In-Jin
    Lee, Seok-Jae
    Powiązania:
    https://bibliotekanauki.pl/articles/354736.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Fe-Mn alloy
    ceramic reinforcement
    austenite stability
    mechanical properties
    spark plasma sintering
    Opis:
    The effect of TiC content on the microstructure and mechanical properties of a nanocrystalline Fe-Mn alloy was investigated by XRD analysis, TEM observation, and mechanical tests. A sintered Fe-Mn alloy sample with nano-sized crystallites was obtained using spark plasma sintering. Crystallite size, which is used as a hardening mechanism, was measured by X-ray diffraction peak analysis. It was observed that the addition of TiC influenced the average size of crystallites, resulting in a change in austenite stability. Thus, the volume fraction of austenite at room temperature afterthe sintering process was also modified by the TiC addition. The martensite transformation during cooling was suppressed by adding TiC, which lowered the martensite start temperature. The plastic behavior and the strain-induced martensite kinetics formed during plastic deformation are discussed with compressive stress-strain curves and numerical analysis for the transformation kinetics.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 4; 1249-1254
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Composition on Strain-Induced Martensite Transformation of FeMnNiC Alloys Fabricated by Powder Metallurgy
    Autorzy:
    Choi, Seunggyu
    Jeon, Junhyub
    Seo, Namhyuk
    Moon, Young Hoon
    Shon, In-Jin
    Lee, Seok-Jae
    Powiązania:
    https://bibliotekanauki.pl/articles/356419.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    FeMnNiC alloy
    spark plasma sintering
    strain induced martensite
    austenite stability
    hardness
    Opis:
    We investigated the austenite stability and mechanical properties in FeMnNiC alloy fabricated by spark plasma sintering. The addition of Mn, Ni, and C, which are known austenite stabilizing elements, increases its stability to a stable phase existing above 910°C in pure iron; as a result, austenitic microstructure can be observed at room temperature, depending on the amounts of Mn, Ni, and C added. Depending on austenite stability and the volume fraction of austenite at a given temperature, strain-induced martensite transformation during plastic deformation may occur. Both stability and the volume fraction of austenite can be controlled by several factors, including chemical composition, grain size, dislocation density, and so on. The present study investigated the effect of carbon addition on austenite stability in FeMnNi alloys containing different Mn and Ni contents. Microstructural features and mechanical properties were analyzed with regard to austenite stability.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 3; 1001-1004
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dilatometric Analysis of the Sintering Behavior of Bi2Te3 Thermoelectric Powders
    Autorzy:
    Han, Ju-Yeon
    Byun, Jong Min
    Lee, Young-In
    Choi, Byung Joon
    Kim, Hogyoung
    Oh, Sung-Tag
    Powiązania:
    https://bibliotekanauki.pl/articles/354899.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Bi2Te3
    dilatometric analysis
    sintering behavior
    microstructure
    Opis:
    The sintering behavior of p-type bismuth telluride powder is investigated by means of dilatometric analysis. The alloy powders, prepared by ball milling of melt-spun ribbons, exhibit refined and flake shape. Differential thermal analysis reveals that the endothermic peak at about 280°C corresponds to the melting of bismuth, and peaks existing between 410°C and 510°C are presumably due to the oxidation and crystallization of the powder. The shrinkage behavior of ball-milled powders was strongly dependent of heating rate by the thermal effect exerted on specimens. In the case of 2°C/min, the peak temperature for the densification is measured at 406°C, while the peak temperature at a heating rate of 20°C/min is approximately 443°C. The relative density of specimen pressureless-sintered at 500°C exhibited relatively low value, and thus further study is required in order to increase the density of sintered body.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 3; 1117-1120
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Prediction of Optimized Metalloid Content in Fe-Si-B-P Amorphous Alloys Using Artificial Intelligence Algorithm
    Autorzy:
    Lee, Min_Woo
    Choi, Young-Sin
    Kwon, Do-Hun
    Cha, Eun-Ji
    Kang, Hee-Bok
    Jeong, Jae-In
    Lee, Seok-Jae
    Kim, Hwi-Jun
    Powiązania:
    https://bibliotekanauki.pl/articles/2176648.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Fe-based amorphous alloy
    metalloid elements
    artificial intelligence
    coercivity
    saturation magnetization
    Opis:
    Artificial intelligence operated with machine learning was performed to optimize the amount of metalloid elements (Si, B, and P) subjected to be added to a Fe-based amorphous alloy for enhancement of soft magnetic properties. The effect of metalloid elements on magnetic properties was investigated through correlation analysis. Si and P were investigated as elements that affect saturation magnetization while B was investigated as an element that affect coercivity. The coefficient of determination R2 (coefficient of determination) obtained from regression analysis by learning with the Random Forest Algorithm (RFR) was 0.95 In particular, the R2 value measured after including phase information of the Fe-Si-B-P ribbon increased to 0.98. The optimal range of metalloid addition was predicted through correlation analysis method and machine learning.
    Źródło:
    Archives of Metallurgy and Materials; 2022, 67, 4; 1539--1542
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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