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백신,장석수,김근수,Baek, Shin,Jang, Seok-Su,Kim, Kun-Soo 한국연초학회 2009 한국연초학회지 Vol.31 No.2
향료산업은 화학의 발전과 더불어 번창하였다. 초기에는 시나믹 알데하이드, 바닐린 등과 같은 합성 원료가 제조 되었으며 그 후 장미 천연향의 구성 성분인 메틸 아이오논이 합성되었고 점차 더 섬세하고 지속성이 강하며 안정성 및 확산성이 좋은 신규향료 개발로 연구가 진행되었다. 점차 미량으로도 충분한 향을 발현할 수 있는 향 강도가 강한 향료 개발이 가속화 되었다. 특히 최근에는 GC-MS와 GC-Olfactometry 기술의 발전에 따라 천연물에 존재하는 화합물의 확인이 더 용이해 지면서 향 화학자들의 연구 영역이 점점 더 확대되고 있다. 본 논문에서는 담배에 사용되는 케미칼 향의 분자 골격 또는 골격에 다양한 곁가지로 유도체를 합성함으로써 분자구조에 따른 향 특성 변화에 대해 논의 하였다. 세계적으로 점차 담배에 사용되는 향의 종류가 감소되는 추세에서 동일한 향 계열 중 본 논문에서 언급된 다양한 향을 적절히 선택하여 대체 사용함으로써 첨가제의 축소 및 감소에 많은 도움이 되리라 생각된다. 우선 단맛(sweet)을 내는 물질에 대해 논하는데 이 부분은 상당히 광범위하다. 그래서 단맛의 대표적인 열대과일 향과 쵸코렛 향에 대해 먼저 언급하고, 다음으로 구수한 스모키 향과 팝콘향, Cooling하고 Fresh한 향 특징을 주는 멘솔 유도체 향, 과일 향, 버섯 향, 꽃 향, 스파이스한 향 등에 대해 언급하였다.
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Psim시뮬레이션과 전동기-발전기(MG) 세트의 출력특성분석
임형택(Hyung-Tack Lim),조다솜(Da-Som Jo),손효수(Hyo-Soo Son),문상수(Sang-Soo Moon),이석현(Seok-Hyun Lee),김근수(Kun-Su Kim),조철희(Chul-Hee Jo) 한국신재생에너지학회 2014 신재생에너지 Vol.10 No.3
The importance of energy is growing according to the energy shortage and environmental concerns. Accordingly, in order to solve the problems about the use of fossil fuel, a renewable energy sources are needed. Global renewable energy power industrys position in the renewable energy market becomes important and new technology development is also essential. MG set composed by the induction motor and permanent magnet synchronous generator for simulating a renewable energy source is based on a suitable experiment equipment. The torque generated by applying a voltage to the induction motor in MG set is used as an input of the permanent magnet synchronous generator. In Psim simulation, the characteristics of the induction motor model was formulated and the output torque characteristics of the motor was controlled using the induction motor side inverter, In this paper, the comparison analysis between Psim simulation and the output characteristics of the MG set is performed in order to identify a renewable energy power system more accurately.
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하영준,김근수 仁荷大學校 스포츠科學硏究所 1995 論文集 Vol.7 No.-
The purpose of this study was to compare muscular strengths, muscular powers and muscular endurances between judoists and players of Korean wrestling(ssireum). Cybex 6000 was used to measure these isometric muscular capabilities. The subjects were 12 elite male judoists and 12 male professional players of Korean wrestling. The muscular strength was measured by averaging the peak torques exerted at the knee joint as the knee was flexed and extended three times at the speeds of 60 deg/sec and 240 deg/sec. The muscular power and muscular endurance were measured by 25 times repetitions of the knee flexion and extension at the speed of 180 deg/sec. The results of the study are as follows; 1. The isometric extension strengths of the knee joint of judoists and players of Korean wrestling at the speed of 60 deg/sec were 237.7 ±54.43Nm and 299.3 ±28.47Nm, respectively. The respective isometric flexion strengths were 141.2 ±33.36Nm and 164.3 ±27.60Nm. The isometric extension strengths of the knee joint of judoists and players of Korean wrestling at the speed of 240 deg/sec were 132.66 ±33.13Nm and 157.25 ±25.30Nm, respectively. The respective isometric flexion strengths were 99.3 ±26.07Nm and 108.0 ±17.64Nm. The isometric muscular strengths of the Korean wrestlers group at the both speeds were significantly higher in the knee extension than those of the judoists group, but not significantly different in the knee flexion. 2. The isometric extension muscular powers of the knee joint of judoists and players of Korean wrestling were 289.7 ±74.47watts and 386.1 ±50.48watts, respectively. The isometric muscular power of the Korean wrestlers group was significantly higher in the knee extension than that of judoists group, but not significantly higher in the knee flexion. 3. In the evaluation of the isometric muscular endurance, the total works exerted during 25 times repetitions of knee flexion and extension at the speed of 180 deg/sec were 3609.8 ±23joules in the Korean wrestlers group and 2762.0 ±608.12joules in the judoists group. Its value of the Korean wrestlers group was significantly higher than that of the judoists group. The ratios of muscular endurance in the judoists and Korean wrestlers group were 60.7 ±12.05% and 68.8 ±9.75 in the knee extension and 54.7 ±11.72% and 50.4 ±12.94% in the knee flexion, respectively.
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