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내구성, 경제성이 뛰어난 폴리우레아 부표 기술 연구 개발
김상천,정해상,김민철 한국항해항만학회 2018 한국항해항만학회 학술대회논문집 Vol.2018 No.추계
국제항로표지협회에서는 일정 규모이상의 해양의 양식장에는 (등)부표를 의무적으로 설치할 것을 권고하고 있다. 현재 사용되는 철제와 프라스틱 부표는 제작비용이 너무 고가로서 자발적인 설치가 어려운 실정이다. 그러므로 기존 부표보다 훨씬 저렴하면서도, 친환경적 이면서도 내구성이나 기능이 뛰어난 부표를 개발하여 어민들에게 보급할 필요가 있다. 본 연구에서는 가벼우면서도 견고한 EPS(발포폴리 스티렌, 고밀도 스티로폼)를 내부재료로 사용하고, 외부에 폴리우레아를 충분한 두께로 도포한 등부표에 관한 연구를 하였다.
다기능 경량 등부표(Multi-light buoy)에 관한 연구
김상천 한국항해항만학회 2012 한국항해항만학회 학술대회논문집 Vol.2012 No.추계
다기능 경량 등부표는 바다와 강에 설치되어 선박 항로표시 및 수산, 양식 산업 시설물 경제표시 등 선박충돌사고 및 인명사고를 미연에 방지하기 위한 용도이며, 또한 수심이 낮은 해안과 암초지역은 물론 어떤 장소에서도 설치 및 운용이 용이하여 다양한 용도로 활용할 수 있도록 개발되었다.
金相天 광주대학교 1988 論文集 Vol.5 No.-
This Study was performed in search for the Physique, intellectual faculties and Personalties of the Toogi, including Judo, Wrestling, Boxing, Weightlifting etc. 59 Collegeate's students were selected for the object. They were given the personality test, mental test measurement of the stature, the weight, the circumference of the chest and upper arm bent sinews, the thigh, skinfold thickness and the like. The result can be summarised as follows. 1. Statures of Weightlifting Players in all the three physical grades were lower than Taekwondo Players. 2. In the circumference of the chest, weightlifting Players were larger than Taekwondo Players in all the three Physical grades. 3. The skinfold thickness of boxers was larger than wrestlers in all the three Physical grades. 4. In the intelligence test, all the Players were in average 98.29 percent, and Taekwondo Players had 102.33 percent. 5. In sociality I(family), Judo Players had average quotient of 8.65(30%) and Weightlifting Players showed 11.67(48%) in average. 6. In sociality II(associates), Taekwondo Players showed 15.81(19%) and wrestlers showed 22.03(40%) in average. 7. In conformity, Judo Players showed average quotient of 9.54(35%) and boxers had 11.4(52%). 8. In adaptability, Weightlifting Players showed average quotient of 14.98(30%) and wrestlers had 21.33(63%). 9. In Mood, Taekwondo Players showed average quotient of 12.06(20%) and wrestlers showed 16.29(46%). 10. In emotional stability, Judo Players, Weightlifting Players and Taekwondo Players showed average quotient of 13.14(35%), 13.22(36%), and 13.54(37%), and boxers and wrestlers showed 19.66(70%) and 18.31(60%). 11. In leadership, each of Taekwondo Players and Weighlifting Players showed average quotient of 13.37(27%) and 13.68(29%), and Judo Players and Wrestling Players showed each 15.10(48%) and 15.09(47%).
최대운동부하후 운동선수와 일반학생의 Catecholamine 반응에 관한 연구
김상천 圓光大學校 附設 體力科學硏究所 1999 體力科學硏究 Vol.22 No.-
The purpose of study was to investigate the effects on plasma responses to catecholamine after all-out exercise of college athlete group and non-major student. Analysis of plasma catecholamine and insulin was done in athlete group(5) and non-major group(5). None of the volunteers were taking any midication for at least 3 months preceding the study. Subjects fasted for 2 hours and abstrained from alcohol, tobacco, at least 24 hours prior to testing. Blood samples were collected at 30min before exercise, immediately after exercise at 10min and 20min during recovery post exercise. All data were expressed as mean and S.D, From the statistical evaluation of the data and review of related previous studies conclusions may be made as follows; 1. epinephrined level was significantly increased in both athletes and non-major at maximal exercise(P<.05, P<.01). 2. Norepinephrined level was significantly increased in both athletes and non-major at maximal exercise(P<.05).