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김형관 ( Kim Hyeong Gwan ),김효수 ( Kim Hyo Su ),오세일 ( O Se Il ),채인호 ( Chae In Ho ),김철호 ( Kim Cheol Ho ),오병희 ( O Byeong Hui ),이명묵 ( Lee Myeong Mug ),최윤식 ( Choe Yun Sig ),박영배 ( Park Yeong Bae ) 한국지질동맥경화학회 ( 구 한국지질학회 ) 2002 韓國脂質學會誌 Vol.12 No.1
Objectives: The relation of apolipoprotein(apo)B-100/apo A-I ratio to coronary artery disease (CAD) has not been well investigated. The aim of this study was to reveal the association between apoB-100/apoA-I ratio and CAD. Methods: The study population co
UV 임프린팅법에 의한 필름형 광도광판의 제조 및 특성 연구
김형관(Hyeong-Gwan Kim),김소원(So-Won Kim),이희철(Hee-Chul Lee) 한국표면공학회 2016 한국표면공학회지 Vol.49 No.2
In this study, we have fabricated light guide plates (LGPs) in thin film form for edge type back light unit (BLU) by using UV imprint lithography. In the LGPs, the pattern of functional resins on PC and PMMA substrates were successfully transferred from original master mold through PVC stamp. Optimized pattern arrays with slowly-sloped density were designed to obtain high brightness and uniformity. We could obtain a relatively improved brightness of 950 cd/㎡ and a uniformity of 87.3% by using the NP-S20 functional resins at an input power of 1.3 W because NP-S20 resin could show high formability after UV hardening process. The LGP prepared on polymethylmethacrylate (PMMA) substrate exhibited higher brightness than that on polycarbonate (PC) substrate because PMMA has lower refractive index resulting in more refraction toward the vertical direction.
축구 동호회 가입 유인 및 저해 예측변수 탐색 : 기계학습을 통한 2021 국민생활체육조사 자료 분석
김형관(Kim, Hyeong-Gwan),유진은(Yoo, Jin-Eun) 한국체육과학회 2023 한국체육과학회지 Vol.32 No.6
Soccer club enrollment appears necessary to advance the role of soccer as Sports for All (SFA) and consequently to promote its effect on SFA. The main purpose of this study is to explore predictors to impact soccer club enrollment via machine learning. A total of 413 soccer participants and their 247 variables from the 2021 National Survey on Sports for All data were analyzed using group Mnet and random forest, respectively. As the machine learning methods did not show statistically significant differences in terms of prediction, group Mnet, a linear method, was chosen for its strength in interpretation. As a result of group Mnet, 19 predictors were selected contributing to the prediction of soccer club enrollment. Predictors to encourage enrollment included degrees of regular physical activities, economic expenditure levels on physical activities, and perceived importance of social interaction in sports club activities. On the other hand, discouraging predictors included perceptions on drinking, the current level of interest in soccer, and the economic burden relating to physical activities. Based on the results, future policy directions were suggested for more effective policy implementation of soccer as SFA.