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World Journal of Gastroenterology 2021年第48期27卷 8357-8369页

作者： dong-Hoe koo Min-Hee Ryu Mi-Yeon Lee Mee-Sun Moon Yoon-koo kang Division of Hematology/Oncology Department of Internal MedicineKangbuk Samsung HospitalSungkyunkwan University School of MedicineSeoul 03181South Korea Department of Oncology Asan Medical CenterUniversity of Ulsan College of MedicineSeoul 05505South Korea Division of Biostatistics Department of R&D ManagementKangbuk Samsung HospitalSeoul 03181South Korea

BACKGROUND New prognostic factors have been reported in patients with metastatic or recurrent gastric cancer(MRGC),necessitating modifications to the previous prognostic *** To develop a new model,MRGC patients who received fluoropyrimidines/platinum doublet chemotherapy between 2008 and 2015 were *** A total of 1883 patients was divided into a training set(n=937)and an independent validation set(n=946).RESULTS Multivariate analysis showed that the following six factors were associated with poor overall survival(OS)in the training set:Eastern Cooperative Oncology Group performance score≥2 and bone metastasis(2 points each),peritoneal metastasis,high alkaline phosphatase level,low albumin level,and high neutrophil-lymphocyte ratio(1 point each).A prognostic model was developed by stratifying patients into good(0-1 point),moderate(2-3 points),and poor(≥4 points)risk *** the validation set,the median OS of the three risk groups was 15.8,10.1,and 5.7 mo,respectively,and those differences were significant(P<0.001).CONCLUSION We identified six factors readily measured in clinical practice that are predictive of poor prognosis in patients with *** new model is simpler than the old and more easily predicts OS.

关键词： Stomach neoplasms Chemotherapy Prognosis Validation Gastric cancer

A new species of Zanclognatha Lederer and three new records of the families Erebidae and Noctuidae(Lepidoptera,Noctuoidea)from Korea,with notes on larval feeding habits

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Journal of Forestry Research 2021年第3期32卷 1235-1240页

作者： kang-Won Lee Joon-Mo koo Jae-dong Kim Hui-Lin Han Kyu-Tek Park Holoce Ecosystem Conservation Research Institution HoengseongGangweon Province 225-841Republic of Korea Department of Plant Medicine Chungbuk National UniversityCheongju28644Republic of Korea Department of Applied Biology College of Agriculture and Life ScienceChungnam National UniversityDaejeon 34134Republic of Korea School of Forestry Northeast Forestry UniversityHarbin 150040China Key Laboratory of Sustainable Forest Ecosystem Management-Ministry of Education Northeast Forestry UniversityHarbin 150040People’s Republic of China Bioresource and Environmental Center Incheon National UniversityIncheon 22012Republic of Korea

A new species of Zanclognatha Lederer,1857 of the family Erebidae,*** sp.n.,one species of Family Erebidea,Asota egens(Walker,1854)and two species of Family Noctuidae:Meganephria retinea Gyulai and Ronkay,1999 and Amphipyra subrigua Bremer and Grey,1853,are reported for the first time from *** addition,larval feeding habits with their host plants for three species are newly recognized from *** of adults,larvae for Zanclognatha querciella and Meganephria retinea,and the genitalia of male or female for all species are provided.

关键词： Host plants New species New records Korean peninsula Taxonomy

Anatomical resection of hepatocellular carcinoma: A critical review of the procedure and its benefits on survival

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World Journal of Gastroenterology 2017年第7期23卷 1139-1146页

作者： koo Jeong kang Keun Soo Ahn Division of Hepatobiliary and Pancreatic Surgery Department of SurgerySchool of MedicineKeimyung University Dong-san Medical CenterDaegu 41931South Korea

Hepatocellular carcinoma(HCC) is the sixth most common type of cancer and the third most frequent cause of cancer-related death. Advances in preoperative assessment of HCC(e.g., imaging studies and liver function tests), surgical techniques, and postoperative care have improved the surgical outcomes and survival of patients who undergo hepatic resection for HCC. However, in the last 20 years, the long-term survival after hepatectomy has remained unsatisfactory owing to the high rates of local recurrence and multicentric occurrence. Anatomical liver resection(AR) was introduced in the 1980 s. Although several studies have revealed tangible benefits of AR for HCC, these benefits are still debated. Because most HCCs occur in patients with liver cirrhosis and poor hepatic function, there are many factors that affect survival, including the surgical method. Nevertheless, many studies have documented the perioperative and long-term benefits of AR in various conditions. In this article, we review the results of several recently published, well-designed comparative studies of AR, to investigate whether AR provides real benefits on survival outcomes. We also discuss the potential pitfalls associated with this approach.

关键词： Hepatocellular carcinoma Cirrhosis Curative Anatomical resection Prognosis

Lump type crossed fused renal ectopia with bilateral vesicoureteral reflux: A case report

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World Journal of Clinical Cases 2019年第6期7卷 773-777页

作者： Taesoo Choi koo Han Yoo Ran Song dong-Gi Lee Department of Urology School of MedicineKyung Hee University Division of Rheumatology Department of Internal MedicineSchool of MedicineKyung Hee University

BACKGROUND Crossed fused renal ectopia is a rare congenital anomaly of the ascent of the kidney. This anomaly may be observed as a solitary kidney during initial evaluation. A solitary kidney must be evaluated for associated anomalies such as duplication,horseshoe kidney,or crossed renal *** SUMMARY An anomaly was observed in a 9-mo-old male child who was subsequently diagnosed with crossed fused renal ectopia and vesicoureteral reflux(VUR). In this condition,recurrent febrile urinary tract infection can be a serious problem,and can easily cause renal damage due to relatively short ureters and high pressure in the *** To prevent urosepsis and preserve renal function,early diagnosis and proper management including surgical correction should be considered for the management of renal ectopia with VUR.

关键词： Kidney Congenital abnormalities Vesicoureteral reflux Ureteroneocystostomy Politano-Leadbetter Case report

Transparent high-performance piezoceramics through pressureless sintering

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Journal of Advanced Ceramics 2024年第5期13卷 561-567页

作者： Hye-Lim Yu Woo-Seok kang Ju-Hyeon Lee Temesgen Tadeyos Zate Young-Jin Lee Bo-Kun koo dong-Jin Shin Min-Soo Kim Soon-Jong Jeong Young Ghyu Ahn Wook Jo Department of Material Science and Engineering Ulsan National Institute of Science and TechnologyUlsan 44919Republic of Korea Energy Conversion Research Center Korea Electrotechnology Research InstituteChangwon 51543Republic of Korea MLCC Development Team Component Biz.UnitSamsung Electro-Mechanics Co.Ltd.Suwon 16674Republic of Korea

Piezoelectricity offers an electromechanical coupling that is widely utilized in transducer *** has been a consistent demand for transparent piezoelectric materials for optoelectrical ***,despite the inherent tradeoff between the transparency and the piezoelectricity,numerous strategies have been explored to develop the transparent piezoelectric ***,the most transparent piezoelectric materials developed to date is either a single crystal or materials that achieve transparency via hot-press sintering,limiting its industrial ***,we introduce a novel piezoelectric material that ensures transparency through co-doping and pressureless sintering of polycrystalline *** this study,we employed a compositional optimization approach to enhance the synergistic effect between the transparency and the piezoelectric properties of 0.71Pb(Mg_(1/3)Nb_(2/3))O_(3)–0.29PbTiO_(3)(PMN–0.29PT)*** utilizing the tape casting process for mass production and large-area manufacturing,our Pb_(0.913)La_(0.0145)Sm_(0.0145)(Mg_(1/3)Nb_(2/3))_(0.71)Ti_(0.29)O_(3)(TP2.9)ceramics exhibited over 60%transparency and large piezoelectric coefficient(d33)of 1104 pC/*** material holds considerable promise for a wide range of industrial applications in both the optical and electronic domains.

关键词： piezoelectric ceramics transparency pressureless sintering co-doping tape casting

Silver-palladium alloy deposited by DC magnetron sputtering method as lubricant for high temperature application

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中国有色金属学会会刊：英文版 2009年第4期19卷 1001-1004页

作者： Jung-Dae KWON Sung-Hun LEE koo-Hyun LEE Jong-Joo RHA Kee-Seok NAM Sang-Hoon CHOI dong-Min LEE dong-Il KIM Materials Processing Division Korea Institute of Materials Science Technology Research & Development Institute Korea Plant Service and Engineering

The silver-palladium(Ag-Pd) alloy coating as a solid lubricant was investigated for its application to the high temperature stud bolts used in nuclear power plants.A hex bolt sample was prepared in the following steps:1) bolt surface treatment using alumina grit blasting for cleaning and increasing the surface area;2) nickel(Ni) film coating as a glue layer on the surface of the bolt;and 3) Ag-Pd alloy coating on the Ni *** films were deposited by using a direct current(DC) magnetron sputtering *** thickness and composition of the Ag-Pd alloy film have effect on the friction coefficient,which was determined using axial force measurement.A 500 nm-thick Ag-Pd(80-20,molar ratio) alloy film has the lowest friction coefficient of 0.109.A cyclic test was conducted to evaluate the durability of bolts coated with either the Ag-Pd(80-20) alloy film or N-5000 *** a cycle,the bolts were inserted into a block using a torque wrench,which was followed by heating and *** only one cycle,it was not possible to remove the bolts coated with the N-5000 oil from the ***,the bolts coated with the Ag-Pd(80-20) alloy could be easily removed up until 15 cycles.

关键词：银钯合金直流电高温润滑剂沉积磁控溅射法固体润滑涂层高温螺栓

New Year’s greeting and overview of World Journal of Hepatology in 2021

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World Journal of Hepatology 2021年第1期13卷 1-5页

作者： Ke-Qin Hu koo Jeong kang Nikolaos Pyrsopoulos Xiang Li Division of Gastroenterology and Hepatology University of CaliforniaIrvine Medical CenterOrangeCA 92868United States Division of Hepatobiliary Pancreatic Surgery Department of SurgeryKeimyung University Dong-San Medical CenterDaegu 41931South Korea Medicine-Gastroenterology and Hepatology Rutgers-New Jersey Medical SchoolNewarkNJ 07103United States Production Department Baishideng Publishing Group IncPleasantonCA 94566United States

The World Journal of Hepatology(WJH)was launched in October *** mainly publishes articles reporting research findings in the field of hepatology,covering a wide range of topics,including viral hepatitis B and C,non-alcoholic fatty liver disease,alcoholic liver disease,autoimmune and chronic cholestatic liver disease,drug-induced liver injury,cirrhosis,liver failure,hepatocellular carcinoma,coronavirus disease 2019-related liver conditions,*** of December 31,2020,the WJH has published 1349 articles,among which,the total cites is 18995 and the average cites per article is *** celebrating the New Year,we are pleased to share with you special a New Year’s greeting from the WJH Editors-in-Chief,along with a detailed overview of the journal’s submission,peer review and publishing metrics from *** all,we are appreciative for the substantive support and submissions from authors worldwide,and the dedicated efforts and expertise provided by our invited reviewers and editorial board members.

关键词： World Journal of Hepatology New Year’s greeting message Editors-in-Chief Editorial Board Highly influential scientists Baishideng Publishing Group Inc

Heterogeneity in the risk of incident liver cirrhosis driven by PNPLA3 genotype and diabetes among different populations

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Hepatobiliary Surgery and Nutrition 2024年第1期13卷 115-118页

作者： Bo Kyung koo dong Hyeon Lee Jeong Hwan Park Won Kim Division of Endocrinology Department of Internal MedicineBoramae Medical CenterSeoulRepublic of Korea Department of Internal Medicine Seoul National University College of MedicineSeoulRepublic of Korea Division of Gastroenterology and Hepatology Department of Internal MedicineBoramae Medical CenterSeoulRepublic of Korea Department of Pathology Boramae Medical CenterSeoulRepublic of Korea

Advanced fibrosis determines the prognosis of nonalcoholic fatty liver disease(NAFLD);therefore,accurate risk-prediction for advanced fibrosis is fundamental in the management of NAFLD(1).Targeted screening for advanced fibrosis in high-risk populations,such as those with type 2 diabetes,obesity with metabolic complications,a family history of cirrhosis,or significant alcohol use is recommended for implementing early intervention to prevent future adverse hepatic outcomes of NAFLD(2,3).Non-invasive tests including fibrosis-4 index(FIB-4)and liver stiffness measurement(LSM)are recommended to identify individuals at a higher risk of liver-related events(1,2).In addition to clinical classifications,such as FIB-4;genetic information provides further stratification for liver-related outcomes(4).

关键词： Nonalcoholic fatty liver disease(NAFLD) cirrhosis PNPLA3-rs738409

Colonoscopy-induced ischemic colitis in patients without risk factors

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World Journal of Gastroenterology 2014年第13期20卷 3698-3702页

作者： Sang Ok Lee Sae Hee Kim Sung Hee Jung Chan Woong Park Min Ji Lee Jin A Lee Hyun Cheol koo Anna Kim Hyun-Young Han dong-Wook kang Division of Gastroenterology Department of Internal MedicineEulji University College of MedicineEulji University HospitalDaejeon 302-779South Korea Department of radiology Eulji University College of MedicineEulji University HospitalDaejeon 302-779South Korea Department of pathology Eulji University College of MedicineEulji University HospitalDaejeon 302-779South Korea

Ischemic colitis is the most common form of intestinal *** is a condition that is commonly seen in the elderly and among individuals with risk factors for *** predisposing conditions for ischemic colitis are major vascular occlusion,small vessel disorder,shock,some medications,colonic obstructions and hematologic *** colitis following colonoscopy is ***,we report two cases of ischemic colitis after a routine screening colonoscopy in patients without risk factors for ischemia.

关键词： Ischemic colitis Colonoscopy Hematochezia

The effect of fair disclosure regulation on timeliness and informativeness of earnings announcements

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China Journal of Accounting Research 2013年第1期6卷 35-49页

作者： Yeonhee Park Inman Song dong-Hoon Yang Mahmud Hossain Jeong-Ho koo Department of Business Information Education Kongju National UniversityRepublic of Korea Department of Accounting SungKyunKwan UniversityRepublic of Korea School of Accountancy University of Hawaii at ManoaUSA dongguk Business School Dongguk University3-26 Pil-dong Chung-gu Seoul 100-715 Republic of Korea School of Accounting Curtin UniversityAustralia Department of Accounting Kumoh National Institute of TechnologyRepublic of Korea

This paper examines the effect of Korea's fair disclosure regulation on the timeliness and informativeness of earnings announcements. The present regulation for Korean listed firms requires that if a company's sales revenue, operating income(or loss) and net income(or loss) have changed by over 30%compared to the prior year, the firm must disclose this information through a preliminary financial report(PFR) even before the company is audited by external auditors. To analyze the effects of this policy, we first investigate the timeliness of preliminary financial report disclosures. We examine the extent to which Korean listed companies actually comply with the requirement for prompt notification of information concerning material changes in financial performance. Second, we investigate the informativeness of preliminary financial reports by analyzing differential stock market reactions to different timings of preliminary financial report disclosures. Our empirical results reveal that more than half of our sample firms release their preliminary financialreports after external audits are completed, thereby potentially invalidating the effectiveness of the regulation. In addition, we find that preliminary financial reports have information value only if they are disclosed prior to annual audit report dates. This finding supports the notion that timeliness increases the informativeness of preliminary financial report disclosure by curbing insiders' ability to potentially profit from their information advantage.

关键词： Fair disclosure Preliminary reports Interim information Timeliness of information Korea