http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
최대우,신양섭,현광석 忠南大學校體育科學硏究所 1994 體育科學硏究誌 Vol.12 No.1
I measured the heart rate of 5 male students of the department of phisical education, Chungnam National University, with a heart cheker and a pedometer, during footvolley ball games. The results are following: 1. The intensity which needs the improvement of Endurance Over Whole Body is 60-70% of VO₂ Max. The event suiting this was the play with 3persons without breaking time. 2. Whey they took warming-up for 5 minutes before the footvolley ball game, their mean heart rate was 122.3 beat/min. When they played footvolley ball without warming-up, their heart rate was 145.6 beat/min. The latter was higher than the former by 23.3 beat/min. 3. The mean heart rate of the footvolley ball with 3 persons was 126.4 beat/min ; The mean heart rate of footvolley ball with 4 persons was 124.1 beat/min ; The mean heart rate of footvolley ball with 5 persons was 108.1 beat/min. thus 3 person play indicated the highest intensity the shortest unit time. (P〈0.001) 4. The mean heart beat was 5.7 best/min with or without time ; the heart beat without breaking time was higher. (P〈0.001) 5. The heart beat of Forward and Backard was that Backward (3 persons) was a little higher and Forward (4 or 5 persons) was a little higher.
열간 단조용 금형강 SKD61의 열처리에 따르는 기계적 성질의 변화
이찬규,최영선,윤재홍,조대현,신희권 國立 昌原大學校 産業技術硏究所 1997 産技硏論文集 Vol.11 No.-
The best heat treatment conditions for improving mechanical properties was invastigated about effecting of solution treatment and tempering temperature in various condition of SKD61. The mechanical property of SKD61 has been studied by tensile, hardness and sharphy test, and observation microstructure.