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이강주 ( Kang Ju Lee ),이나경 ( Na Gyung Lee ),주현정 ( Hyun Jeong Ju ),박선화 ( Sun Hwa Park ),임차영 ( Cha Young Lim ),오효원 ( Hyo Won Oh ),이흥수 ( Heung Soo Lee ) 대한예방치과·구강보건학회 2013 大韓口腔保健學會誌 Vol.37 No.4
Objectives: This study investigated the busyness of dentists and analyzed factors related to busyness in these professionals. Methods: The subjects were 243 practicing dentists. Surveys were carried out via mail. Busyness was measured by using the Mumma scale. The data were analyzed using the Kruskal-Wallis test. Results: The dentists` busyness index was 1.91. Of the participants, 40% of practicing dentists wanted more patients, 30.8% did not overwork but did not want more patients, and 27.1% overworked and did not want more patients. The busyness index was significantly related to the number of dental hygienists and dentists. However, it did not differ with respect to the number of assistant nurses. Conclusions: The busyness index should be considered when developing relevant human resource plans.
일회적 태극권수련과 수영이 HRV에 미치는 영향력 비교
이강주(Gang Ju Lee),김동환(Dong Hwan Kim),김상복(Sang Bok Kim) 한국사회체육학회 2014 한국사회체육학회지 Vol.0 No.57
The purpose of this study was to compare the effect of acute Ti aChi training with swimming exercise onheart rate variability. Participants were 27 students(Tai Chi group(11), swimming(18), control group(8) beingin G university located in SungNam City. All participants were conducted previous and immediate and recoverytest(after 15min). Tai Chi group performed 24 forms set up Yan gStyle during 15 minutes. Swimming groupperformed 100m individual medley of butterfly(25m), back stroke(25m), breaststroke(25m), crawl(25m) sequence. Control group performed only 3 measurements at same timing as the other groups without treatment. The results follow that first swimming exercise increases hear trate and skin tensions. Second Acute Tai Ch itraining increases SDNN and RMSSD compared with swimming and control group. Results of this study meansthat Tai Chi training increase effectively parasympathetic function and HRV. Comparison of results of this studywith antecedent paper were discussed.
이강주(Kang-Ju Lee),구성영(Seoung-Young Koo),김동욱(Dong-Wook Kim) 전력전자학회 2009 전력전자학술대회 논문집 Vol.2009 No.1
본 논문은 현대중공업에서 추진하고 있는 1.65MW급 풍력터빈에 적용된 이중여자 권선형 유도발전기 제어를 위한 핵심장치인 전력변환 장치 기술개발에 대해 기술한다. 1.65MW DFIG 제어를 위해 Back-to-back IGBT Converter를 설계하고, 방열을 위해 수냉식 구조를 갖는 전력스택을 채택하였으며, 풍력터빈에 의해 발전된 전력을 계통에 연계하기 위한 제반 기술과 Grid-code에 대응하기 위한 제어알고리즘등이 반영된다.