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- 저자 : Yen-Hsun Huang (검색결과 3 건)
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Metal Chloride Precursor Synthesization of Cu2ZnSnS4 Solar Cell Materials
Min Yen Yeh,Yu-Fong Huang,Cheng-Liang Huang,Chyi-Da Yang,Dong-Sing Wuu,Po-Hsun Lei 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.2
Cu2ZnSnS4 (CZTS) thin films with kesterite structures were prepared by directly sol-gel synthesizingspin-coated precursors on soda-lime-glass (SLG) substrates. The CZTS precursors wereprepared by using solutions of copper (II) chloride, zinc (II) chloride, tin (IV) chloride, and thiourea. The ratio of SnCl4 in the precursors was found to play a critical role in the synthesization of CZTS. CZTS phases of SnS and SnS2 were observed in the synthesized films as prepared using precursorswith a close to stoichiometric ratio of CuCl2:ZnCl2:SnCl4:CH4N2S = 4:1:1:8, where SnCl4 was 1mol/l. The amounts of the educed SnS and SnS2 phases observed in the SEM images could bereadily reduced by decreasing the volume of SnCl4 in the mixed solution. With decreasing amountof SnCl4 from 1 mol/l, the as prepared CZTS reveals a significant improvement in its crystallineproperties. In this work, CZTS with an average absorption coefficient and an optical energy gapof over 104 cm−1 and 1.5 eV, respectively, was obtained using precursors of copper (II) chloride,zinc (II) chloride, tin (IV) chloride, and thiourea mixed in a ratio of 2:1:0.25:8, and it had goodcrystallinity revealing a Cu-poor composition.
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Lan Ting-Yuan,Lin Yen-Chun,Tseng Tai-Chung,Yang Hung-Chih,Kao Jui-Hung,Cheng Chiao-Feng,Lee Tai-Ju,Huang Shang-Chin,Lu Cheng-Hsun,Li Ko-Jen,Hsieh Song-Chou 거트앤리버 소화기연관학회협의회 2023 Gut and Liver Vol.17 No.2
Background/Aims: Rituximab is known to be associated with high hepatitis B virus (HBV) reactivation rate in patients with resolved HBV infection and hematologic malignancy. However, data regarding HBV reactivation (HBVr) in rheumatic patients receiving rituximab is limited. To assess the HBVr rate in hepatitis B surface antigen (HBsAg)-negative patients receiving rituximab for autoimmune diseases in a large real-world cohort. Methods: From March 2006 to December 2019, 900 patients with negative HBsAg receiving at least one cycle of rituximab for autoimmune diseases in a tertiary medical center in Taiwan were retrospectively reviewed. Clinical outcome and factors associated with HBVr were analyzed. Results: After a median follow-up period of 3.3 years, 21 patients developed HBVr, among whom 17 patients were positive for hepatitis B core antibody (anti-HBc) and four were negative. Thirteen patients had clinical hepatitis flare, while eight patients had HBsAg seroreversion without hepatitis. Old age, anti-HBc positivity, undetectable serum hepatitis B surface antibody level at rituximab initiation and a higher average rituximab dose were associated with a higher HBVr rate. There was no significant difference in the HBVr risk between rheumatoid arthritis and other autoimmune diseases. Among anti-HBc-negative patients, subjects without HBV vaccination at birth had an increased risk of HBVr (4/368, 1.1%) compared with those who received vaccination (0/126, 0%). Conclusions: In HBV endemic areas where occult HBV is prevalent, anti-HBc-negative patients, may still be at risk for HBVr after rituximab exposure. HBVr may still be considered in HBsAgnegative patients developing abnormal liver function after rituximab exposure, even in patients with negative anti-HBc.
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Yu-Fan Lin,Chien-Ying Wang,Yen-Hsun Huang,Sheng-Min Lin,Ying-Ying Yang 한국보건의료인국가시험원 2022 보건의료교육평가 Vol.19 No.-
Purpose Endotracheal intubation and central venous catheterization are essential procedures in clinical practice. Simulation-based technology such as smart glasses has been used to facilitate medical students’ training on these procedures. We investigated medical students’ self-assessed efficacy and satisfaction regarding the practice and training of these procedures with smart glasses in Taiwan. Methods This observational study enrolled 145 medical students in the 5th and 6th years participating in clerkships at Taipei Veterans General Hospital between October 2020 and December 2021. Students were divided into the smart glasses or the control group and received training at a workshop. The primary outcomes included students’ pre- and post-intervention scores for self-assessed efficacy and satisfaction with the training tool, instructor’s teaching, and the workshop. Results The pre-intervention scores for self-assessed efficacy of 5th- and 6th-year medical students in endotracheal intubation and central venous catheterization procedures showed no significant difference. The post-intervention score of self-assessed efficacy in the smart glasses group was better than that of the control group. Moreover, 6th-year medical students in the smart glasses group showed higher satisfaction with the training tool, instructor’s teaching, and workshop than those in the control group. Conclusion Smart glasses served as a suitable simulation tool for endotracheal intubation and central venous catheterization procedures training in medical students. Medical students practicing with smart glasses showed improved self-assessed efficacy and higher satisfaction with training, especially for procedural steps in a space-limited field. Simulation training on procedural skills with smart glasses in 5th-year medical students may be adjusted to improve their satisfaction.
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