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Limited endoscopic sphincterotomy plus large balloon dilation for choledocholithiasis with periampullary diverticula

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World Journal of Gastroenterology 2010年第34期16卷 4335-4340页

作者： hyung Wook Kim Dae Hwan Kang Cheol Woong Choi Jong Hwan Park Jin Ho lee Min Dae Kim Il Doo Kim Ki Tae Yoon Mong Cho Ung Bae Jeon suk Kim Chang Won Kim Jun Woo lee Department of Internal Medicine Pusan National University School of Medicine and Medical Research Institute Pusan National University Yangsan Hospital Department of Radiology Pusan National University School of Medicine and Medical Research Institute Pusan National University Hospital

AIM: To investigate the effectiveness and safety of limited endoscopic sphincterotomy (EST) plus large balloon dilation (LBD) for removing choledocholithiasis in patients with periampullary diverticula (PAD). METHODS: A total of 139 patients with common bile duct (CBD) stones were treated with LBD (10-20 mm balloon diameter) after limited EST. Of this total, 73 patients had PAD and 66 patients did not have PAD (controls). The results of stone removal and complications were retrospectively evaluated. RESULTS: There were no significant differences between the PAD and the control groups in overall successful stone removal (94.5% vs 93.9%), stone removal in first session (69.9% vs 81.8%), mechanical lithotripsy (12.3% vs 13.6%), and complications (11.0% vs 7.6%). Clinical outcomes were also similar between the types of PAD, but the rate of stone removal in first session and the number of sessions were significantly lower and more frequent, respectively, in type B PAD (papilla located near the diverticulum) than controls [23/38 (60.5%) vs 54/66 (81.8%), P = 0.021; and 1 (1-2) vs 1 (1-3), P = 0.037, respectively] and the frequency of pancreatitis was significantly higher in type A PAD (papilla located inside or in the margin of the diverticulum) than in controls (16.1% vs 3.0%, P = 0.047). CONCLUSION: Limited EST plus LBD was an effective and safe procedure for removing choledocholithiasis in patients with PAD. However, some types of PAD should be managed with caution.

关键词： Endoscopic sphincterotomy Large balloon dilation Choledocholithiasis Periampullary diverticula

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Dual function of a high-contrast hydrophobic-hydrophilic coating for enhanced stability of perovskite solar cells in extremely humid environments

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Nano Research 2017年第11期10卷 3885-3895页

作者： Jin Sun Yoo Gill Sang Han Seongha lee Min Cheol Kim Mansoo Choi Hyun suk Jung Jung-Kun lee School of Advanced Materials Science amp Engineering Sungkyunkwan University Suwon 440-746 Republic of Korea Department of Mechanical Engineering and Materials Science University of Pittsburgh Pittsburgh Pennsylvania 15261 USA Department of Mechanical and Aerospace Engineering Seoul National University Seoul 08826 Republic of Korea

In spite of a continuous increase in their power conversion efficiency （PCE） and an economically viable fabrication process,organic-inorganic perovskite solar cells （PSCs） pose a significant problem when used in practical applications：They show fast degradation of the PCE when exposed to very humid *** this study,the stability of PSCs under very humid conditions is greatly enhanced by coating the surface of the PSC devices with a multi-layer film consisting of ultrahydrophobic and relatively hydrophilic layers.A hydrophobic composite of poly（methyl methacrylate）（PMMA）,polyurethane （PU）,and SiO2 nanoparticles successfully retards the water molecules from very humid ***,the hydrophilic layer with moderately PMMA captures the residual moisture within the perovskite layer;subsequently,the perovskite layer *** dual function of the coating film keeps the PCE of PSCs at 17.3% for 180 min when exposed to over 95% humidity.

关键词： perovskite solar cell stability surface coating ultrahydrophobic self-recovery

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Novel Architecture of OneM2M-Based Convergence Platform for Mixed Reality and IoT

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Computers, Materials & Continua 2022年第4期71卷 51-69页

作者： Seungwoon lee Woogeun Kil Byeong-hee Roh SJ Kim Jin-suk Kang Department of Computer Engineering and Department of AI Convergence Network Ajou UniversitySuwon16499Korea Howard R.Hughes College of Engineering University of NevadaLas VegasNV89154USA AST Co.Ltd. Suwon16681Korea

There have been numerous works proposed to merge augmented reality/mixed reality(AR/MR)and Internet of Things(IoT)in various ***,they have focused on their specific target applications and have limitations on interoperability or reusability when utilizing them to different domains or adding other devices to the *** paper proposes a novel architecture of a convergence platform for AR/MR and IoT systems and *** proposed architecture adopts the oneM2M IoT standard as the basic framework that converges AR/MR and IoT systems and enables the development of application services used in general-purpose environments without being subordinate to specific systems,domains,and device *** implement the proposed architecture utilizing the open-source oneM2M-based IoT server and device platforms released by the open alliance for IoT standards(OCEAN)and Microsoft HoloLens as an MR device *** also suggest and demonstrate the practical use cases and discuss the advantages of the proposed architecture.

关键词： Internet of things(IoT) augmented realty(AR) mixed reality(MR) microsoft HoloLens oneM2M convergence platform

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Experimental investigation of friction coefficient in tube hydroforming

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Transactions of Nonferrous Metals Society of China 2011年第A01期21卷 194-198页

作者： Hyae Kyung YI Hong Sup YIM Gun Yeop lee Sung Mun lee Gi suk CHUNG Young-Hoon MOON Engineering Research Center for Net Shape and Die Manufacturing School of Mechanical Engineering Pusan National University Technical Research laboratories POSCO Jeonnam 545-090 Korea

The friction coefficient between tube and die in guide zone of tube hydroforming was obtained. In hydroforming, the tube is expanded by an internal pressure against the tool wall. By pushing the tube through tool, a friction force at the contact surface between the tube and the tool occurs. In guiding zone, the friction coefficients between tube and die can be estimated from the measured axial feeding forces. In expansion zone, the friction coefficients between tube and die can be evaluated from the measured geometries of expanded tubes and FE analysis.

关键词： tube hydroforming friction coefficient lubricant axial force internM pressure

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基于高光谱成像技术应用光谱及纹理特征识别柑橘黄龙病（英文）

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光谱学与光谱分析 2016年第7期36卷 2344-2350页

作者：马淏吉海彦 Won suk lee 中国农业大学现代精细农业系统集成研究教育部重点实验室北京100083 河南科技大学农业工程学院河南洛阳471003 Department of Agricultural and Biological Engineering University of FloridaGainesvilleFL32611USA

讨论了基于高光谱成像技术光谱及纹理特征在识别早期柑橘黄龙病中的应用。使用一套近地高光谱成像系统采集了176枚柑橘叶片的高光谱图像作为实验样品,其中健康叶片60枚,黄龙病叶片60枚,缺锌叶片56枚。手工选取每幅叶片高光谱图像的病斑... 详细信息

讨论了基于高光谱成像技术光谱及纹理特征在识别早期柑橘黄龙病中的应用。使用一套近地高光谱成像系统采集了176枚柑橘叶片的高光谱图像作为实验样品,其中健康叶片60枚,黄龙病叶片60枚,缺锌叶片56枚。手工选取每幅叶片高光谱图像的病斑位置作为样品感兴趣区域（regions of interest,ROI）,计算其平均光谱反射率,并以此作为样品的反射光谱,光谱范围为396～1 010nm。样品光谱分别经过主成分分析（PXA）及连续投影算法（SPA）进行数据降维,再结合最小二乘支持向量机（LS-SVM）分类器建立分类模型。相比原始光谱,由PCA选取的前四个主成分及SPA选取的一组最佳波长组合（630.4,679.4,749.4和899.9 nm）建立的模型拥有更好的分类识别能力,其对三类柑橘叶片平均预测准确率分别为89.7%和87.4%。同时,从被选四个波长的每幅灰度图像中提取6个灰度直方图的纹理特征以及9个灰度共生矩阵的纹理特征再次构建分类模型。经SPA优选的10个纹理特征值进一步提高了分类效果,对三类柑橘叶片的识别正确率达到了100%,93.3%和92.9%。实验结果表明,同时包含光谱信息及空间纹理信息的高光谱图像在柑橘黄龙病的识别中显示了很大的潜力。

关键词：柑橘黄龙病高光谱成像分类纹理特征连续投影算法

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Insights from Seoul National University Hospital’s experience: a systematic review of pure laparoscopic donor hepatectomy progression

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Hepatobiliary Surgery and Nutrition 2024年第2期13卷 293-300页

作者： suk Kyun Hong YoungRok Choi Nam-Joon Yi Kwang-Woong lee Kyung-suk Suh Department of Surgery Seoul National University College of MedicineSeoulSouth Korea

Following its initial execution in November 2015,pure laparoscopic donor hepatectomy(PLDH)has gained acceptance as a conventional practice at Seoul National University Hospital(SNUH).It is noteworthy that a significant proportion of cases entail full right hepatectomies,which are acknowledged to be technically *** expertise and knowledge have been accrued,the pure laparoscopic technique has been extended to encompass liver recipients as a viable option in *** aim of this review is to present the developmental progression of PLDH,with a focus on pure laparoscopic donor right hepatectomy(PLDRH),at *** includes the standardization process,which can be achieved by sharing the hospital’s accumulated experience and previous *** types of graft,including full right,left,left lateral section,and monosegment,were procured by pure laparoscopic *** criteria for selection were expanded to include donors with variations in the anatomy of the portal vein and bile ***,the procedure of PLDRH was determined to be safe and viable for donors with high body mass index and larger graft *** conclusion,this review demonstrates the alterations implemented throughout our evolution from restricted to inclusive criteria for donor selection,leading to a complete shift from open surgery to pure laparoscopic procedures in donor hepatectomy and eventually pure laparoscopic living donor liver transplantation(LDLT)in recipient.

关键词： Donor hepatectomy laparoscopy living donor liver transplantation(LDLT) right hepatectomy minimally invasive

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A New Species of Amsassia from the Ordovician of Korea and South China:Paleobiological and Paleogeographical Significance

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Acta Geologica Sinica(English Edition) 2016年第3期90卷 796-806页

作者： Mirinae lee Heeju PARK Nguyen Viet TIEN suk-Joo CHOH Robert J.ELIAS Dong-Jin lee Department of Earth and Environmental Sciences Andong National UniversityAndong36729Republic of Korea Institute of Geological Sciences-Vietnam Academy of Science and Technology(IGS-VAST) Hanoi100000Socialist Republic of Vietnam Department of Earth and Environmental Sciences Korea UniversitySeoul02841Republic of Korea Department of Geological Sciences The University of ManitobaWinnipegR3T 2N2Canada

A new species of the probable calcareous alga Amsassia, A. koreanensis, is recognized from the Duwibong Formation （Middle Ordovician, Darriwilian） of the Taebaeksan Basin in mid-eastern Korea. This is the first report of the genus from the Korean Peninsula, expanding its geographical range to the eastern Sino-Korean Block. The new species also occurs in the Xiazhen Formation （Upper Ordovician, Katian） at Zhuzhai in the South China Block. Amsassia koreanensis is the smallest species of this modular genus, having a maximum module diameter of 0.28 ram. Module increase is by bipartite, tripartite and quadripartite types of longitudinal axial fission, but unlike other species of the genus, quadripartite fission is common. The types of fission are comparable to those in some Tetradiida （now Prismostylales, florideophycean rhodophyte algae）, although the processes of fission are different. The distribution of A. koreanensis further strengthens the biogeographical connection between the Sino-Korean and South China blocks, suggesting that these two paleocontinents were located closer together during the Middle to Late Ordovician than previously speculated.

关键词： Amsassia koreanensis sp. nov. Ordovician Sino-Korean Block South China Block paleobiology paleogeography.

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Recoverable SnO_2-Based Sensors Promoted with MoO_3 and Sb_2O_3 for the Detection of DMMP

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稀有金属材料与工程 2006年第A03期35卷 155-156页

作者： Woo suk lee Ho Yun Choi Soo Chool lee Soo Jae lee Duk Dong lee Jeung Soo Huh Jae Chang Kim Department of Chemical Engineering Kyungpook National UniversityDaegu 702-701Korea School of Electrical Engineering and Computer Science Kyungpook National UniversityDaegu 702-701Korea Department of Materials Science and Metallurgy Kyungpook National UniversityDaegu 702-701Korea

The sensitivity and the recovery behavior of SnO_2-based gas sensor prepared from a commercial SnO_2 powder were tested under the low concentration of DMMP(0.5μg/g) in the flow system at 350℃.In order to improve the sensitivity of the sensor,promoters such as NiO,Nb_2O_5,MoO_3,and Sb_2O_3 were added into SnO_2 *** sensitivities were increased up to 80% from 50% but they were not *** the SnO2-based gas sensor promoted with MoO_3 and Sb_2O_3 was recovered after detection of DMMP,although the recovery rate was *** particular,the SnO_2-based sensor promoted with 5wt% of MoO_3 and 1wt% of Sb_2O_3 simultaneously showed an complete recovery ability,though its sensitivity was 40% which was lower than that of SnO_2 gas sensor without *** ability was discussed in terms of catalytic roles of promoters.

关键词： SnO2 MoO3 Sb2O3 sensor,recovery DMMP

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Characteristics of damaged layer in micro-machining of copper material

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中国有色金属学会会刊：英文版 2009年第B09期19卷 295-300页

作者： Dong-Hee KWON Jeong-suk KIM Myung-Chang KANG Se-Hun KWON Jong-Hwan lee School of Mechanical Engineering Pusan National University National Core Research Center for Hybrid Materials Solution Pusan National University Department of Mechatronics Busan College of Korea Polytechnic Ⅶ

The study on damaged layer is necessary for improving the machinability in micro-machining because the damaged layer affects the micro mold life and micro machine parts. This study examined the ultra-precision micro-machining characteristics, such as cutting speed, feed rate and cutting depth, of a micro-damaged layer produced by an ultra-high speed air turbine spindle. The micro cutting force, surface roughness and plastic deformation layer were investigated according to the machining conditions. The damaged layer was measured using optical microscope on samples prepared through metallographic techniques. The scale of the damaged layer depends on the cutting process parameters, particularly, the feed per tooth and axial depth of the cut. According to the experimental results, the depth of the damaged layer is increased by increasing the feed per tooth and cutting depth, also the damaged layer occurs less in down-milling compared with up-milling during the micro-machining operation.

关键词：机械加工性微观特征损伤层铜材样品制备技术微型机器切削速度切削深度

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Mitochondria-targeting drug conjugates for cytotoxic, anti-oxidizing and sensing purposes:current strategies and future perspectives

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Acta Pharmaceutica Sinica B 2018年第6期8卷 862-880页

作者： Gantumur Battogtokh Yeon Su Choi Dong Seop Kang Sang Jun Park Min suk Shim Kang Moo Huh Yong-Yeon Cho Joo Young lee Hye suk lee Han Chang Kang Department of Pharmacy Integrated Research Institute of Pharmaceutical Sciences and BK21 PLUS Team for Creative Leader Program for Pharmacomics-based Future Pharmacy College of Pharmacy The Catholic University of Korea Division of Bioengineering Incheon National University Department of Polymer Science and Engineering Chungnam National University

mitochondrial-targeting moieties to anticancer drugs, antioxidants and sensor molecules. Among them, the most widely applied mitochondrial targeting moiety is triphenylphosphonium(TPP), which is a delocalized cationic lipid that readily accumulates and penetrates through the mitochondrial membrane due to the highly negative mitochondrial membrane potential. Other moieties, including short peptides,dequalinium, guanidine, rhodamine, and F16, are also known to be promising mitochondrial targeting agents. Direct conjugation of mitochondrial targeting moieties to anticancer drugs, antioxidants and sensors results in increased cytotoxicity, anti-oxidizing activity and sensing activity, respectively,compared with their non-targeting counterparts, especially in drug-resistant cells. Although many mitochondria-targeted anticancer drug conjugates have been investigated in vitro and in vivo, further clinical studies are still needed. On the other hand, several mitochondria-targeting antioxidants have been analyzed in clinical phases I, II and III trials, and one conjugate has been approved for treating eye disease in Russia. There are numerous ongoing studies of mitochondria-targeted sensors.

关键词： Anticancer agents Antioxidants Direct conjugation Mitochondria-targeting Sensing agents

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