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Timothy 초지에서 고정방목과 윤환방목간의 한우에 의한 목초이용율과 증체량 비교시험
이인덕 ( I . D . Lee ) 한국축산학회 1981 한국축산학회지 Vol.23 No.2
Two grazing systems-continuous and rotational-were compared on herbage utility and body weight gain in a timothy parture at the Taekwanryung area by the 13 Korean native heifer from 1978 to 1979. The results obtained were summarized as follows: 1. In dry matter yield per ha, non significant differences (P$gt;0.05) was found between two systems, however, the rotational grazing tended to be clearly increased compared to continuous grazing. 2. In total haerbage consumption per ha, the rotational grazing was significantly increased by 17% (P$gt;0. 05) compared to continuous grazing, whereas, and average herbage consumption per head, per day was highered in continuous grazing. 3. In utilization ratio of herbage, the rotational grazing was increased by 8.4 compared to continuous grazing. 4. In liveweight gain per ha, the rotational grazing was significantly increased by 13% (P$lt;0.05) compared to continuous grazing, whereas, the liveweight gain per hear, per day was slightly increased in continuous grazing. 5. In sward composition of ladino clover in timothy pasture, the continuous grazing was slightly increased than rotational grazing and also it tended to be increasing as grazing year advanced.
자동차 휠 베어링 설계 시 3축성형한계를 고려한 크랙 예측
이인하(I. H. Lee),안정호(J. H. An),송민우(M. W. Song),송가형(G. H. Song),곽호택(H. T. Kwak) 한국소성가공학회 2016 한국소성가공학회 학술대회 논문집 Vol.2016 No.4
In this study, orbital forming process, assembly method of automotive wheel bearing hub and inner ring, was analytically implemented using the STAMPACK™ that is based on explicit finite element method. CPU time significantly reduced beside implicit finite element method and STAMPACK™ analysis showed similar results with the test data. Additionally, It predicted crack and found solution plan using TFD(triaxiality fracture diagram).