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Formation and Characterization of Plasma Sprayed Photocatalytic TiO2- ZnO Nano- Compounded Coatings

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Journal of Rare Earths 2004年第Z2期22卷 162-166页

作者： Lee Soo Wohn Aum Ho Sung Hur bo young Chen Huang Division of Materials and Chemical Engineering Sun Moon UniversityAsanChungnam 336708Korea Division of Mechanical and Control EngineeringSun Moon UniversityAsanChungnam 336708Korea Division of Materials EngineeringGyeong Sang National UniversityChinju 660701Korea Division of Materials and Chemical EngineeringSun Moon UniversityAsanChungnam 336708Korea

Two kinds of TiO2-ZnO nano-compounded powders aggregated by spray-drying process and evaporation method were used to deposit photocatalytic coatings by atmospheric plasma spraying technique. The phase compositions, morphologies of the agglomerated TiO2-ZnO powders and the as-sprayed coating were characterized using X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM) respectively. Furthermore, roughness measurements were carried out on their surfaces of the plasma sprayed TiO2-ZnO nano-comPounded coatings. Compared with the TiO2ZnO nano-compounded coating deposited from the spray-dried powder, it was found that the TiO2-ZnO nano-compounded coating deposited from the evaporated powder possesses higher anatase phase. It is ascribed to the existing of partially melted or non-melted microstructure in the TiO2-ZnO coating deposited from the evaporated powder. The partially-meltedor non-melted microstructure was retained from the starting agglomerated powder. This microstructure is beneficial to improve the photocatalytic properties of plasma sprayed TiO2-ZnO nano-compounded coatings.

关键词： plasma spraying spray-drying evaporation characterization TiO2-ZnO rare earths

Fabrication of Mg-Zn-Y-based quasi-crystal by pouring melt into different cooling media

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China Foundry 2012年第3期9卷 207-214页

作者： Wang Zhifeng Zhao Weimin Qin Chunling Hur bo-young School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China Light Metals Group Korea Institute of Materials ScienceChangwon 642-831Republic of Korea School of Nano and Advanced Materials Engineering Gyeongsang National UniversityJinju 660-701Republic of Korea

Mg-Zn-Y-based quasi-crystal （QC） alloys were fabricated by pouring melts into different cooling media. The effects of different cooling rates on the QC morphology, size, volume fraction and micro-hardness were studied. Multi-component Mg-Zn-Y-based QC alloys were synthesized based on amorphous design principle. QC morphology transformation and its influencing factors were analyzed. Micro/nano spherical quasi-crystals （QCs） were fabricated through a wedge-shaped copper mould and their forming mechanism were discussed by atoms cluster theory, optimum cooling rate theory and the known crucial criteria. The results of research show that with the cooling rate reduced, the solidified morphology of QC phase changes from near-spherical, micro petals （1 to 2 um） to big petals （20 um） and finally grows up to bulk pentagon or hexagon （200 to 400 um）. Multi-component micro-spherical QCs possess higher value of micro-hardness than petal-like QCs with the same components, and also higher than ternary micro-Mg-Zn-Y QCs. The fine master alloys containing micro-QCs （0.4 um） and nano-QCs （about 300 nm and 40 nm） have been fabricated correspondingly on the middle and the tip of wedge-shaped castings. A morphology evolution schematic diagram of Mg-Zn-Y-based QCs is included in this paper.

关键词： quasi-crystals cooling media magnesium alloy Mg-Zn-Y-based alloys

The Influence of Longitudinal Magnetic Field on the CO_2 Arc Shape

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Plasma Science and Technology 2015年第4期17卷 321-326页

作者：常云龙刘明旭路林 A.S.BABKIN bo-young LEE Institute of Material Science and Engineering Shenyang University of Technology Metallurgical Institute Lipetsk State Technical University School of Aerospace and Mechanical Engineering Korea Aerospace UniversityGoyangGyeonggi-do 412-791Republic of Korea

The COarc welding was carried out under a longitudinal magnetic field,and the arc shape has been studied by using a high-speed *** the camera images,we know that under the action of the longitudinal magnetic field,the upper end of the arc will constrict and the lower end of the arc will *** would become a bell-type shape and rotate at a highspeed in the optimum range of magnetic field *** arc shape was simulated using a mathematical model,which was established based on experiment data and theoretical knowledge,and mechanism analysis has been carried out regarding the effect of longitudinal magnetic field on COwelding arcs.

关键词： longitudinal magnetic field high-speed camera the arc of CO_2 welding computer simulation technology

Prevention and management of adverse events following COVID-19 vaccination using traditional Korean medicine:An online survey of public health doctors

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World Journal of Clinical Cases 2022年第28期10卷 10053-10065页

作者： Byungsoo Kang Hongmin Chu bo-young Youn Jungtae Leem College of Korean Medicine Dongshin UniversityNaju-si 58245South Korea Daecheong Public Health Subcenter Ongjin Public HealthcenterIncheon 23105IncheonSouth Korea Department of Preventive Medicine College of Korean MedicineKyung Hee UniversitySeoul 02447South Korea College of Korean Medicine Wonkwang UniversityIksan 54538Jeollabuk-doSouth Korea

BACKGROUND Since February 2021,vaccination against coronavirus disease 2019(COVID-19)caused by severe acute respiratory syndrome coronavirus 2 has started in *** To perform a questionnaire survey about the prevention and management of adverse events of COVID-19 vaccination among public health doctors of Korean Medicine(PHKMDs).METHODS An online questionnaire was developed,comprising categories about adverse events of vaccination(AEVs)and perception of using Korean medicine(KM)in managing vaccine adverse events(AEs)among ***’experience of AEVs,usage of Korean medicine for AEVs,and perception and attitude in using KM for AEVs were *** survey web-link was emailed to the association of *** links were sent through Survey Monkey to all PHKMDs in *** A total of 143 participants were recruited for this study;65%of participants were vaccinated at the same of the survey(n=93).Although most participants did not take any medication for prevention of the adverse events,62%(n=58)of participants had taken herbal medicine to treat the adverse events(n=52).Approximately 35%of participants(n=33)said that they would recommend taking herbal medicine to prevent any *** various KM interventions,the participants strongly recommended taking an herbal medicine(n=69,74.19%)to treat AEs,and the second-highest was acupuncture treatment(n=19,20.43%).CONCLUSION Overall,this research demonstrated a high prevalence of KM usage by the ***,this study’s results may serve as fundamental evidence for health professionals to consider using KM treatments when treating or preventing AEVs in the near future.

关键词： COVID-19 Vaccination Adverse events Herbal medicine Korean medicine

Process of establishing design requirements and selecting alternative configurations for conceptual design of a VLA

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Chinese Journal of Aeronautics 2017年第2期30卷 738-751页

作者： bo-young Bae Sangho Kim Jae-Woo Lee Nhu Van Nguyen bong-Cheul Chung Department of Aerospaee Information Engineering Konkuk University Seoul 143-701 Republic of Korea Konkuk Aerospace Design Airworthiness Research Institute Konkuk University Seoul 143-701 Republic of Korea

In this study,a process for establishing design requirements and selecting alternative configurations for the conceptual phase of aircraft design has been *** proposed process uses system-engineering-based requirement-analysis techniques such as objective tree,analytic hierarchy process,and quality function deployment to establish logical and quantitative ***,in order to perform a logical selection of alternative aircraft configurations,it uses advanced decision-making methods such as morphological matrix and technique for order preference by similarity to the ideal *** addition,a preliminary sizing tool has been developed to check the feasibility of the established performance requirements and to evaluate the flight performance of the selected *** present process has been applied for a two-seater very light aircraft（VLA）,resulting in a set of tentative design requirements and two families of VLA configurations：a high-wing configuration and a low-wing *** resulting set of design requirements consists of three categories：customer requirements,certification requirements,and performance *** performance requirements include two mission requirements for the flight range and the endurance by reflecting the customer *** flight performances of the two configuration families were evaluated using the sizing tool developed and the low-wing configuration with conventional tails was selected as the best baseline configuration for the VLA.

关键词： Aircraft configuration Conceptional design Design requirements Requirement analysis Very light aircraft (VLA)

Hemoglobin induces colon cancer cell proliferation by release of reactive oxygen species

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World Journal of Gastroenterology 2006年第35期12卷 5644-5650页

作者： Ryung-Ah Lee Hyun-Ah Kim bo-young Kang Kwang-Ho Kim Ewha Medical Institute Department of Surgery College of Medicine Ewha Womans University Seoul Korea Department of Surgery College of Medicine Ewha Womans University Seoul Korea Ewha Medical Institute Ewha Womans University Seoul Korea

AIM: To study whether hemoglobin could amplify colon cancer cell proliferation via reactive oxygen species (ROS) production. METHODS: Colon cancer cell line HT-29 was grown in the conventional method using RPMI1640 media. The viability of the cells was measured using the colorimetric MTT [3-(4, 5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazo- lium bromide] assay after adding hemoglobin. We de- termined reactive oxygen species levels to be indicators of oxidative stress in HT 29 cell lines with and without hemoglobin and/or 5-fluorouracil (5-FU), 5’-deoxy-5-flu- orouridine (5-DFUR) using fluorometric dichlorofluorescin diacetate (DCFH-DA) assay. RESULTS: Cellular proliferation was increased with he- moglobin in a concentration-dependent manner. A signif- icant increment on ROS levels was found in HT 29 cells following hemoglobin incubation. The cytotoxic effects of 5-FU and 5-DFUR were significantly blunted by admin- istration of hemoglobin. There was a slight increase of peroxiredoxin 1, superoxide dismutase 1 concentration according to different hemoglobin concentrations. CONCLUSION: Hemoglobin has a cellular proliferative effect on HT-29 colon cancer cell line by production of ROS. Also, hemoglobin abates cytotoxic effects of che- motherapeutic agents such as 5-FU and 5-DFUR.

关键词： Colon cancer Hemoglobin Reactive oxygen species

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基于数字博物馆接触的青年传统文化认同

新闻与传播评论 2025年第1期78卷 46-65页

作者：韩博刘嘉琪中国社会科学院新闻与传播研究所北京100021

数字文博产品在吸引青年走进“云端”博物馆的同时,也带领他们走近中华优秀传统文化。为探索青年群体从数字博物馆的接触中生成传统文化认同,刻画其表征、影响因素与过程,论文以“云游敦煌”“数字故宫”等17个代表性数字博物馆为样本,... 详细信息

数字文博产品在吸引青年走进“云端”博物馆的同时,也带领他们走近中华优秀传统文化。为探索青年群体从数字博物馆的接触中生成传统文化认同,刻画其表征、影响因素与过程,论文以“云游敦煌”“数字故宫”等17个代表性数字博物馆为样本,以QQ空间中的大规模评论数据为基准材料,采用混合研究设计:第一阶段,利用扎根理论对相关评论内容进行质化研究;第二阶段,随机招募到全国4365个有效青年样本参加线上问卷调查。研究结果显示:数字博物馆接触是促成青年传统文化认同的有力途径。其中,数字博物馆文化情境中的文化展品与文化表征耦合构成吸引青年的基础条件,启动环节在于唤醒青年主体的具身联觉,加工环节在于激活个体内隐文化心理加工过程以形成更深层次的文化感知,最终青年传统文化认同生成或强化的表现主要呈现于认知认同、情感涌现和行为实践三个方面。此外,与原有文化印象的比较和集体文化记忆的勾连,作为调节因素共同影响着青年传统文化认同结果。

关键词：青年数字博物馆传统文化认同扎根理论

Etching characteristics and surface modification of InGaSnO thin films under Cl_(2)/Ar plasma

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Plasma Science and Technology 2023年第10期25卷 91-96页

作者： young-Hee JOO Jae-Won CHOI bo HOU Hyuck-In KWON Doo-Seung UM Chang-Il KIM Department of Electronic and Electrical Engineering Chung-Ang UniversitySeoul 06974Republic of Korea Department of Firearms and Optics Daeduk UniversityDaejeon 34111Republic of Korea School of Physics and Astronomy Cardiff UniversityCardiff CF243AAUnited Kingdom Department of Electrical Engineering Sejong UniversitySeoul 05006Republic of Korea

Indium gallium tin oxide(IGTO)thin films have the potential for high mobility and lowtemperature processing,which makes them suitable for applications such as display backplanes and high-voltage switching ***,very few studies have investigated the plasmaetching characteristics of IGTO and changes in its properties after *** this study,the etching characteristics of IGTO were investigated using Cl_(2)/Ar plasma,and changes in surface properties were *** showed that the etch rate increased with an increase in the proportion of Cl_(2),with the highest etch rate observed at 69 nm min^(-1)in pure Cl_(2)plasma with a gas flow rate of 100 ***,increased radio-frequency power caused a rise in the etch rate,while a process pressure of 15 m Torr was *** primary etching mechanism for IGTO thin films under Cl_(2)plasma was a chemical reaction,and an increased work function indicated the occurrence of defects on the *** addition,the etching process reduced the surface roughness of Cl_(2)-containing plasma,whereas the etching process in pure Ar plasma increased surface *** study contributes to a better understanding of the plasmaetching characteristics of IGTO and changes in its properties after etching,providing valuable insights for IGTO-based applications.

关键词： InGaSnO Cl2-based plasma etching mechanism surface modification plasma etching

Usefulness of magnifying endoscopy for iodine-unstained lesions in a high-risk esophageal cancer population

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World Journal of Gastroenterology 2010年第37期16卷 4709-4715页

作者： Ik Seong Choi Jae young Jang Won young Cho Tae Hee Lee Hyun Gun Kim bo young Lee Soung Won Jeong Joo young Cho Joon Seong Lee So young Jin Institute for Digestive Research SoonChunHyang University College of Medicine

AIM: To investigate the usefulness of magnified observations of iodine-unstained esophageal lesions in the histological diagnosis of esophageal mucosa abnormalities, in high-risk esophageal cancer groups. METHODS: The subjects included 38 patients who had at least one of the four criteria known to be highrisk factors for esophageal cancer. Following endoscopic observation, magnified observations were performed on iodine-unstained lesions of the esophagus. The total number of lesions was 43. These lesions were classified as type A (clear papilla), type B (fused papilla), and type C (non-visible papilla) according to the findings. Tissue biopsy was then carried out. Finally the histological findings were graded in terms of histological factors, and their relationships were compared. RESULTS: Of the 43 lesions, 11 were type A, 17 were type B, and 15 were type C under magnifying endoscopy. Histological findings such as inflammatory cell infiltration and basal cell hyperplasia were significantly increased in type B and type C lesions compared with type A lesions (P < 0.05). Low-grade esophageal dysplasia was apparent in 1 (9%) of 11 type A lesions, in 3 (18%) of 17 type B lesions, and in 6 (40%) of 15 type C lesions, with the highest rate in type C. CONCLUSION: Magnified observations of the esophagus, classified by papillary aspects using magnifying endoscopy of iodine-unstained lesions in high-risk esophageal cancer groups, are considered useful in estimating dysplasia and inflammation of esophageal mucosa.

关键词： Esophageal cancer Iodine Magnifying endoscopy