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정정수(C . S . Chung),권관(K . Kwon),한규범(K . B . Han),김인수(I . S . Kim) 한국축산학회 1989 한국축산학회지 Vol.31 No.11
The present study was undertaken to determine the effects of recombinant porcine growth hormone(rpGH, supplied by Lucky, Ltd., Korea) on growth performance of growing pigs. Twelve barrows with an average initial live weight of 48kg were allocated to either control group(n=6) or rpGH group(n=6). Recombinant rpGH (70ug/kg BW) or vehicle was injected in the extensor muscle daily for 49 days. Pigs were fed a diet containing 16.45% of crude protein and 0.85% of lysine. As expected, serum rpGH was elevated by rpGH injection. Administration of rpGH increased average daily gain by 6%(1.04 vs 1.11kg), improved feed/gain by 10%(3.203 vs 2.895; p $lt;0.05), decreased backfat thickness by 19%(3.60 vs 2.91cm; p $lt;0.01), and increased loin eye area by 5%(36.84 vs 38.53㎠). These results indicate that rpGH administration improves swine growth performance, suggesting that considerable potential exists for development of a GH-based growth promotant for the swine industry.
단차가 있는 철근콘크리트 무량판의 강성보정계수에 대한 연구
김상희(Kim, Sang-Hee),강현구(Kang, Thomas H.-K),김재요(Kim, Jae-Yo),홍건호(Hong, Geon-Ho),한규범(Han, Gyu-Beom),송정훈(Song, Jung-Hoon),박홍근(Park, Hong-Gun) 대한건축학회 2014 大韓建築學會論文集 : 構造系 Vol.30 No.3
The purpose of this study is to propose a modification factor to reflect the stiffness modification when a step is located in flat plates. Reinforced concrete slabs with steps have different structural characteristics that are demonstrated by a series of structural experiment and nonlinear analysis. The corner at the step is weak and flexible, and thus the associated rotational stiffness at the corner of the step is identified through analysis of 6 type models using a nonlinear finite element program. Then a systematic analysis on stiffness changes is performed using a linear finite element procedure along with rotational springs. The stiffness of reinforced concrete flat plates with steps is mainly affected by the step length, location, thickness and height. Therefore, a single modification factor for each of these variables is obtained, while other variables are constrained. When multiple variables are considered, each single modification factor is multiplied each other. Such a method is verified by a comparative analysis. Finally, a complex modification factor can be applied to the existing effective beam width.