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한국시스템다이내믹스 학회지 공저자 네트워크 특성에 관한 연구
김선덕 ( Kim Sun-duck ),신철 ( Sin Cheol ),정형기 ( Hyung-ki Jung ),이만형 ( Man-hyung Lee ) 한국시스템다이내믹스학회 2016 한국시스템다이내믹스 연구 Vol.17 No.3
This study examines the basic conditions of joint authorship research activities in the Korean System Dynamics Review and points out the structural co-author network characteristics among co-authored papers based on the social network analysis(SNA) techniques. In specific, this study identifies the cooperative relationship of research papers in the Korean System Dynamics Review, knowledge formation, and knowledge propagation paths. The study results imply that Korean System Dynamics Review has exhibited the typical ``Steven``s power law,` which is repeatedly observed among complex systems, and that knowledge structure centered upon and propagated around couples of researchers. Additionally, the study results present that there have been active personal exchanges among major researchers. In contrast, personal contacts among research groups and within groups seem relatively weak.
심방세동 환자에서 주요 항부정맥제의 전기생리 작용의 차이
장수영 ( Su Young Jang ),조정관 ( Jeong Gwan Cho ),정형기 ( Hyung Ki Jung ),기원주 ( Won Ju Ki ),이경진 ( Kyoung Jin Lee ),고점석 ( Jum Suk Ko ),이민구 ( Min Goo Lee ),박근호 ( Keun Ho Park ),심두선 ( Doo Sun Sim ),윤남식 ( Nam Si 대한내과학회 2011 대한내과학회지 Vol.80 No.6
Background/Aims: Drug-eluting stents (DES) are superior to bare metal stents (BMS) in reducing restenosis rates across a wide range of patients and lesion subsets.This study compared the clinical outcomes of DES versus BMS in patients with large coronary Methods: The study compared 134 patients (59.9±10.6 years, 90 men, 44 women) who underwent single vessel angioplasty with DESimplantation in large vessels with 115 patients (60.3±8.9 years, 82 men, 33 women) who received BMS. The clinical outcomes at 12 months were compared between groups. The study end points were major adverse cardiac events (MACE), including cardiac death, nonfatal myocardial infarction, and the need for target vessel and target lesion revascularization. Results: The baseline clinical coronary angiography and procedural characteristics were similar in both groups. The duration of dual antiplatelet therapy was longer in the DES group than in the BMS group (240±2.7 vs. 348±1.7 days, p=0.042). During the 12-month clinical follow-up, MACE were observed in 13 patients (11.3%) with BMS and 12 patients (9.0%) with DES (p=0.486). Conclusions: For coronary stents implanted in large coronary arteries, DES seems to be more favorable, although no significant differences were observed in the clinical outcomes between DES and BMS during a 1-year clinical follow-up. (Korean J Med2011;80:664-671)