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A Web-based on-machine mould matching and measurement system based on CAD/CAM/CAI integration

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第9期7卷 1474-1481页

作者： CHOI jin-hwa JEON Byung-cheol KIM Gun-hee SHIN Bong-cheol LEE Honghee CHO Myeong-woo SEONG Eun-je PARK Dong-sam Division of Mechanical Engineering Inha University Incheon 402-751 Korea Department of Mechanical Engineering University of Incheon Incheon 402-749 Korea

The purpose of this study is to develop a Web-based on-machine mould identification and measurement system. The Web-based mould identification system matches obtained vision information with CAD database. Developed Web-based system is to exchange messages between a server and a client by making of ActiveX control, and the result of mould identification is shown on Web-browser at remote site. For effective feature classification and extraction, the signature method is used to make meaningful information from obtained image data. For on-machine measurement of the matched mould, inspection database is constructed from CAD database using developed inspection planning methods. The results are simulated and analyzed using developed system to verify the effectiveness of the proposed methods.

关键词： E-manufacturing CAD/CAM/CAI integration On-machine measurement Mould identification Vision system

Increased intestinal macromolecular permeability and urine nitrite excretion associated with liver cirrhosis with ascites

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World Journal of Gastroenterology 2008年第24期14卷 3884-3890页

作者： Soong Lee Seung-cheol Son Moon-Jong Han Woo-jin Kim Soo-Hyun Kim Hye-Ran Kim Woo-Kyu Jeon Ki-Hong Park Myung-Geun Shin Department of Internal Medicine College of MedicineSeonam University and Seonam University Hospital Department of Laboratory Medicine Chonnam National University Medical School and Chonnam National University Hwasun Hospital Brain Korea 21 Project Center for Biomedical Human Resources at Chonnam National University Medical School Department of Internal Medicine Kangbuk Samsung HospitalSungkyunkwan University School of Medicine Korea Polymer Testing & Research Institute Ltd.

AIM： To determine intestinal permeability, the serum tumor necrosis factor （TNF）-α level and urine nitric oxide （NO） metabolites are altered in liver cirrhosis （LC） with or without ascites. METHODS： Fifty-three patients with LC and 26 healthy control subjects were enrolled in the study. The intestinal permeability value is expressed as the percentage of polyethylene glycol （PEG） 400 and 3350 retrieval in 8-h urine samples as determined by high performance liquid chromatography. Serum TNF-α concentrations and urine NO metabolites were determined using an enzyme-linked immunosorbent assay （ELISA） and Greiss reaction method, respectively. RESULTS： The intestinal permeability index wassignificantly higher in patients with LC with ascites than in healthy control subjects or patients with LC without ascites （0.88 ± 0.12 vs 0.52 ± 0.05 or 0.53 ± 0.03, P 〈 0.05） and correlated with urine nitrite excretion （r = 0.98）. Interestingly, the serum TNF-α concentration was significantly higher in LC without ascites than in control subjects or in LC with ascites （198.9 ± 55.8 pg/mL vs 40.9 ± 12.3 pg/mL or 32.1 ± 13.3 pg/mL, P 〈 0.05）. Urine nitrite excretion was significantly higher in LC with ascites than in the control subjects or in LC without ascites（ 1170.9± 28.7 μmol/L vs 903.1 ± 55.1 μmol/L or 956.7 ± 47.7 μmol/L, P 〈 0.05）. COMCLUSIOM： Increased intestinal macromolecular permeability and NO is probably of importance in the pathophysiology and progression of LC with ascites, but the serum TNF-α concentration was not related to LC with ascites.

关键词： Intestinal permeability Tumor necrosisfactor-R Nitric oxide Liver cirrhosis Ascites

Hepatectomy vs radiofrequency ablation for colorectal liver metastasis:A propensity score analysis

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World Journal of Gastroenterology 2015年第11期21卷 3300-3307页

作者： Huisong Lee jin Seok Heo Yong Beom Cho Seong Hyeon Yun Hee cheol Kim Woo Yong Lee Seong Ho Choi Dong Wook Choi Department of Surgery Samsung Medical CenterSungkyunkwan University School of Medicine

AIM:To compare outcomes from radiofrequency ablation(RFA) and hepatectomy for treatment of colorectal liver metastasis(CRLM).METHODS:From January 2000 to December 2009,408 patients underwent curative intent treatment for *** excluded patients using the criteria:size of CRLM > 3 cm,number of CRLM ≥ 5,percutaneous RFA,follow-up period 2 cm) CRLM(P = 0.034).However,survival curves were similar for single or small(≤ 2 cm) CRLM(P = 0.714,P = 0.740).CONCLUSION:Hepatectomy is better than RFA for the treatment of ***,RFA might be suitable for selected patients with single,small(≤ 2 cm) CRLM.

关键词： Colorectal neoplasm Metastasis Catheter ablation H

Ethanol extract of Kalopanax septemlobus leaf inhibits HepG2 human hepatocellular carcinoma cell proliferation via inducing cell cycle arrest at G_1 phase

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Asian Pacific Journal of Tropical Medicine 2016年第4期9卷 336-342页

作者： cheol Park Ji-Suk Jeong jin-Woo Jeong Sung Ok Kim Yong-Joo Kim Gi-Young Kim Su-Hyun Hong Yung Hyun Choi Department of Molecular Biology College of Natural Sciences and Human EcologyDongeui University Department of Research and Development of Resources Gurye-gun Agricultural Center Wild Flower Institute.Gurye-gun Anti-Aging Research Center.Dongeui University Department of Food Science & Biotechnology College of EngineeringKyungsung University Republic of Korea Laboratory of Immunobiology.Department of Marine Life.Sciences.Jeju National University Department of Biochemistry.Dongeui University

Objective:To investigate the effects of an ethanol extract of Kalopanax septemlobus(Thunb.)***(EEKS) on cell proliferation in human hepatocellular carcinoma cells and its mechanisms of ***:Cells were treated with EEKS and subsequently analyzed for cell proliferation and flow cytometry *** of cell cycle regulators were determined by reverse transcriptase polymerase chain reaction analysis and Western blotting,and activation of eyclin-associaled kinases studied using kinase ***:The EEKS suppressed cell proliferation in both HepG2 and Hep3 B cells,but showed a more sensitive anli-proliferative activity in HepG2 *** cytometry analysis revealed an association between the growth inhibitory effect of EEKS and with G_1 phase cell cycle arrest in HepG2 cells,along with the dephosphorylation of retinoblastoma protein(pRB) and enhanced binding of pRB with the E2 F transcription factor family *** with EEKS also increased the expression of cyclin-dependent kinase(CDK) inhibitors,such as p21WAF1/CIP1 and *** any noticeable changes in G_1 cyclins and CDKs(except for a slight decrease in CDK4).Treatment of HepG2 cells with EEKS also increased the binding of p21 and p27 with CDK4 and *** was paralleled by a marked decrease in the cyclin D- and cyclin E-associated kinase ***:Overall,our findings suggest that EEKS may be an effective treatment for liver cancer through suppression of cancer cell proliferation via G_1,cell cycle arrest Further studies arc required to identify the active compounds in EEKS.

关键词： Kalopanax septemlobus Hepatocellular carcinoma G1 cell cycle arrest CDK inhibitor pRB

Functional magnetic resonance imaging of cerebellar activation and lateralization during verbal and visuospatial tasks

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Neural Regeneration Research 2010年第3期5卷 226-231页

作者： Mi-Hyun Choi Su-Jeong Lee Jae-Woong Yang jin-Seung Choi Hyung-Sik Kim Jeong-Han Yi Gye-Rae Tack Soon-cheol Chung Byung-Chan Min Se-jin Park Jong-Rak Park Jae-Hoon Jun Department of Biomedical Engineering Research Institute of Biomedical Engineering College of Biomedical & Health Science Konkuk University Department of Industrial & Management Engineering Hanbat National University Division of Technology Services National Center for Standard Reference Data Korea Research Institute of Standards and Science Department of Photonic Engineering Chosun University

BACKGROUND： Previous studies have analyzed cerebral activation and lateralization of cognitive functions, as well as cerebellar function with reference to high-level cognitive processing. However, there has been very little research on systematization and diversification. In particular, there are no reports on cerebellar lateralization, although reliable results have been reported on cerebral lateralization. OBJECTIVE： This study analyzed cerebellar activation and lateralization in relation to verbal and visuospatial tasks using functional magnetic resonance imaging （fMRI）. DESIGN, TIME AND SETTING： A block design for fMRI observation was performed at the fMRI Laboratory, Brain Science Research Center, Korea Advanced Institute of Science and Technology from May 2006 to September 2008. PARTICIPANTS： Sixteen healthy, male, college students, aged （23.3 ± 0.5） years, and 16 healthy, male, college students, aged （21.5 ± 2.3） years, participated in the study, respectively. METHODS： Verbal and visuospatial tasks were presented while functional brain images were acquired using a 3T fMRI system. Verbal analogy testing required the subject to select the word with the same relationship as one of the given words. Verbal antonym testing required the subject to select the word with a different meaning among four words. Visuospatial tasks involved selecting a shape that corresponded to a given figure with four examples, as well as selecting a development figure of a diagram. MAIN OUTCOME MEASURES： Changes in cerebellar activation and lateralization between two cognition tasks. RESULTS： Bilateral hemisphere Iobules VI and IX, right hemisphere Iobule VIII, bilateral hemisphere Iobules Crus I, and vermis Iobule IV, V, and Vl were closely related to verbal tasks in comparison to visuospatial tasks. Conversely, bilateral hemisphere Iobules IV and V, as well as the right hemisphere Iobule VI, were closely related to visuospatial tasks compared to verbal tasks. There was no great differe

关键词： cerebellum lateralization functional magnetic resonance imaging verbal and visuospatial tasks neuroimaging neural regeneration

Roles of humidity and heat treatment temperatures on YBa_2Cu_3O_(7-x) coated conductors by trifluoroacetic acid-metal organic deposition process

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中国有色金属学会会刊：英文版 2009年第4期19卷 956-960页

作者： Seok-Hern JANG Jun-Hyung LIM Chang-Min LEE Eui-cheol PARK Soo-Min HWANG Jun-Hyuk CHOI Jong-Hyun SHIM jin-Hyun PARK Won KIM jinho JOO School of Advanced Materials Science and Engineering Sungkyunkwan University

YBa2Cu3O7-x(YBCO) films were fabricated on an LAO substrate using the trifluoroacetic acid-metal organic deposition(TFA-MOD) method and the effects of the humidity and heat treatment temperatures on the microstructure,degree of texture and critical properties of the films were *** order to understand the combined effects of the humidity and the calcining and firing temperatures on critical properties,heat-treatment was performed at various temperatures with the other processing variables *** films were calcined at 400-430 ℃ and fired at 750-800 ℃ in a 0-12.1% humidified Ar-O2 *** texture was determined by pole-figure *** amount of the BaF2 phase was effectively reduced and a sharp and strong biaxial texture was formed under a humidified atmosphere,which led to increased critical *** addition,the microstructure varied significantly with firing temperature but changed little with calcining *** highest IC of 40 A/cm-width,which corresponds to JC value of 1.8 MA/cm2,was obtained for the films fired at 775 ℃(in 12.1% humidity) after calcining at 400-430 ℃.It is likely that the highest IC value is due to the formation of a more pure YBCO phase,c-axis grains,and a denser microstructure.

关键词： YBa2Cu3O7 热处理温度三氟乙酸沉积过程湿度涂层导体有机金属微观结构变化

Modeling and implementation of tandem polymer solar cells using wide-bandgap front cells

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Carbon Energy 2020年第1期2卷 131-142页

作者： Seo-jin Ko Hyosung Choi Quoc Viet Hoang Chang Eun Song Pierre-Olivier Morin Jungwoo Heo Mario Leclerc Sung cheol Yoon Han Young Woo Won Suk Shin Bright Walker jin Young Kim Division of Advanced Materials Korea Research Institute of Chemical Technology(KRICT)DaejeonSouth Korea Department of Chemistry and Research Institute for Natural Sciences Hanyang UniversitySeoulSouth Korea Vietnam Certification Centre Directorate for StandardsMetrology and Quality(STAMEQ)HanoiVietnam Department of Chemistry Laval UniversityQuebec CityCanada Department of Energy Engineering Ulsan National Institute of Science and Technology(UNIST)UlsanSouth Korea Department of Chemistry Korea UniversitySeoulSouth Korea Department of Chemistry Kyung Hee UniversitySeoulSouth Korea

Tandem device architectures offer a route to greatly increase the maximum possible power conversion efficiencies(PCEs)of polymer solar cells,however,the complexity of tandem cell device fabrication(such as selecting bandgaps of the front and back cells,current matching,thickness,and recombination layer optimization)often result in lower PCEs than are observed in single-junction *** this study,we analyze the influence of front cell and back cell bandgaps and use transfer matrix modeling to rationally design and optimize effective tandem solar cell structures before actual device *** approach allows us to estimate tandem device parameters based on known absorption coefficients and open-circuit voltages of different active layer materials and design devices without wasting valuable time and *** this approach,we have investigated a series of wide bandgap,high voltage photovoltaic polymers as front cells in tandem devices with PTB7-Th as a back *** this way,we have been able to demonstrate tandem devices with PCE of up to 12.8%with minimal consumption of valuable photoactive materials in tandem device *** value represents one of the highest PCE values to date for fullerene-based tandem solar cells.

关键词： polymer solar cells solar cells tandem solar cells

The Usefulness of the Self-made Fulcrum in Bending Radiography

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The Usefulness of the Self-made Fulcrum in Bending Radiograp...

Seroprevalence of anti-HAV among patients with chronic viral liver disease

2009中华医学会影像技术分会第十七次全国学术大会

作者： Hyo-jin Lee sang-hyun Kim Dong-joo Kim Hyung-cheol Kim Cheon-kyu Choi Department of Radiology Seoul National University HospitalSeoulKorea

Objective:The quality of Bending Radiography is determined as how well the curvature of the spine gets straightened for the evaluation of the flexibility of spine curvature and the prognosis of *** methods in conventional fulcrum have disadvantages:a physician is needed to apply the pressure and exposed to radiation and the force exerted is difficult to *** studied the usefulness of the self -made fulcrum in Bending Radiography comparing the conventional fulcrum.

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World Journal of Gastroenterology 2011年第2期17卷 236-241页

作者： Hyun Chin Cho Seung Woon Paik Yu jin Kim Moon Seok Choi Joon Hyeok Lee Kwang cheol Koh Byung Chul Yoo Hee Jung Son Seon Woo Kim Division of Gastroenterology Samsung Medical CenterSungkyunkwan University School of Medicine Division of Gastroenterology Center for Health PromotionSamsung Medical CenterSungkyunkwan University School of Medicine Biostatics Team Samsung Medical CenterSungkyunkwan University School of Medicine

AIM:To investigate the current seroprevalence of hepatitis A virus(HAV) antibodies in patients with chronic viral liver disease in *** also tried to identify the factors affecting the prevalence of HAV antibodies. METHODS:We performed an analysis of the clinical records of 986 patients(mean age:49±9 years,714 males/272 females) with chronic hepatitis B virus(HBV) or hepatitis C virus(HCV) infection who had undergone HAV antibody testing between January 2008 and December ***:The overall prevalence of IgG anti-HAV was 86.61%(854/986) in patients with chronic liver disease and was 88.13%(869/986) in age-and gendermatched patients from the Center for Health *** anti-HAV prevalence was 80.04%(405/506) in patients with chronic hepatitis B,86.96%(20/23) in patients with chronic hepatitis C,93.78%(422/450) in patients with HBV related liver cirrhosis,and 100%(7/7) in patients with HCV related liver *** anti-HAV prevalence according to the decade of age was as follows:20s(6.67%) ,30s(50.86%) ,40s(92.29%) ,50s(97.77%) ,and 60s(100%) .The antiHAV prevalence was significantly higher in patients older than 40 years compared with that in patients younger than 40 years of *** analysis showed that age≥40 years,female gender and metropolitan cities as the place of residence were independent risk factors for IgG anti-HAV seropositivity. CONCLUSION:Most Korean patients with chronic liver disease and who are above 40 years of age have already been exposed to hepatitis A virus.

关键词： Chronic hepatitis B Chronic hepatitis C Hepatitis A virus Korea Seroprevalence