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김상천 건국대학교 1975 建農學報 Vol.1975 No.6
Currently farming method in Korea is in the process of mechanization and using tractors in the farm is in a way considered a symbol of such modernization. Therefore it is deemed necessary to make survey on the problem pertinent to using the tractors and analyze the forms of accidents during the agricultural operation, which will, it is hoped, contribute to preventing of minimizing the losses resulting from various accidents. Tractor drivers are recommended to pay attention to the following facts revealed by the study : 1. (a) 60% of tractor accidents in the United States is overturn accidents. (b) Overturn accidents in England account for 80%. (c) Majority of the accidents in Germany is also overturn accidents. 2. The following is a catagorization of accidents by the working stage: (a) During cultivation ‥‥‥‥‥‥‥‥‥18% During transfer‥‥‥‥‥‥‥‥‥‥‥‥15% During convey ………………………………13% 3. Tractor accidents in the farm land occupy 70%. 4. The summer season records the highest accident rate than other seasons and, Monday and Saturday than otter days in the week. 5. Steep slopes, banks and narrow wooden bridges cause the highest accident rate of 66% when tractors transfer. 6. 70% of the accidents occurs in the farm land, three quarter of the rest on the road and the remaining one quarter is traffic accidents related to automobles. 7. Monthly analysis shows that May indicates 13% of the total accidents, which is the highest, and January, Februay and December, the most idle months, record the lowest. 8. Analyzing the relations with weather conditions, accidents take place in the hot and dry season. So, sufficient rest and relaxation is needed on the part of the drivels and excessive work must be avoided. 9. More than 50% of the accidents occur between noon and 18 hours in the day. 10. Tracttors of bigger horse-power are much more susceptible to accidents than those of smaller horse-power.
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.
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.
최대운동부하에 따른 태권도선수의 혈액학검사 변화에 관한 연구
김상천 광주대학교 산업경영연구소 1998 산경연구 : 광주대 Vol.11 No.2
The purpose of this study examined on the change of blood components after maximal exercise load in Taekwando athletes. This study employed ten taekwando athletes as experimental subjects of cardiovascular funcition(Heart Rate, Blood Pressure) and blood components(Leukocyte, Erythrocytes, Hemoglobin, Hematocrit) responses during the maximal exercise with Treadmill for the purpose of observation of blood state. The results at this experiment were as follows: 1. Heart Rate in maximal exercise significantly(P<.05) increased at after exercise. Systolic Pressure in submaximal exercise significantly(P<.05) increased at after exercise, Diastolic Pressure in submaximal exercise significantly(P<.05) increased at after exercise. And recovery time in maximal exercise significantly (P<.05) decreased at 5minutes and 10minutes, 20minutes after. 2. Leukocyte in maximal exercise significantly(P<.01) increased at after exercise. And recovery time in maximal exercise significantly(P<.05) decreased at 5minutes and 10minutes after. Erythrocytes in maximal exercise significantly(P<.05) increased at after exercise. And recovery time in maximal exercise significantly(P<.05) decreased at 10minutes and 20minutes after. 3. Humoglobin in maximal exercise significantly(P<.05) increased at after exercise. And recovery time in maximal exercise significantly(P>.05)decreased without change. 4. Hematocrit in maximal exercise significantly(P<.05) increased at after exercise. And recovery time in submaximal exercise significantly(P<.05)decreased at 5minutes and 10minutes after.