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사료내 약용식물(인진쑥, 오가피 및 마늘)의 첨가가 포유돈, 포유자돈 및 이유자돈의 성적 및 혈청특성에 미치는 효과
권오석,유종상,민병준,손경승,조진호,김해진,진영걸,김인호,Kwon, O.S.,Yoo, J.S.,Min, B.J.,Son, K.S.,Cho, J.H.,Kim, H.J.,Chen, Y.J.,Kim, I.H. 한국축산학회 2005 한국축산학회지 Vol.47 No.4
본 시험은 약용식물(인진쑥, 오가피, 마늘)의 사료내 첨가가 모돈의 생산성, 포유자돈의 성장율 및 이유자돈에서의 성적 및 혈청 특성에 미치는 영향을 알아보고자 실시하였다. 시험 1은 3~5산차의 임신 모돈 48두를 공시하여 각각 1) CON(basal diet; Control), 2) MP1(basal diet added 0.05% of medicinal plant mixtures), 3) MP2(basal diet added 0.1% of medicinal plant mixtures) 그리고 4) MP3(basal diet added 0.2% of medicinal plant mixtures)로 하여 처리구당 12두씩 배치하여 21일동안 실시하였다. 시험 기간동안 포유모돈의 일당 사료섭취량은 약용식물을 0.1% 첨가한 처리구가 0.2%를 첨가한 처리구보다 유의적으로 높게 나타났다(P<0.05). 포유자돈의 개시시와 이유시의 체중 변화에서는 약용식물을 0.05% 첨가한 처리구가 대조구에 비하여 유의적으로 증가하는 경향을 보였다 (P<0.05). 혈액내 glucose의 함량에서는 MP3 처리구가 대조구에 비하여 유의적으로 높게 나타났다(P<0.05). 시험 2는 개시시 체중 4.70$\pm$0.63kg의 3원교잡종(Landrace$\time$Yorkshire$\time$Duroc) 이유자돈 120두를 공시하여 20일간 사양시험을 실시하였다. 시험설계는 옥수수-대두박 위주의 사료로서 NRC(1998)의 영양소 요구량에 따라 1) CON(basal diet; Control), 2) MP1(basal diet added 0.05% of medicinal plant mixtures), 3) MP2(basal diet added 0.1% of medicinal plant mixtures) 그리고 4)MP3(basal diet added 0.15% of medicinal plant mixtures)의 4개의 처리구로 하여 처리당 6반복, 반복당 5두씩 완전임의 배치하였다. 전체시험기간 동안의 이유자돈의 일당증체량(linear, P<0.067)과 사효효율(linear, P<0.018)에서는 약용식물을 첨가함으로서 증가하는 경향을 보였으며, 사료섭취량(linear, P<0.018)에서는 감소하는 경향을 보였다. 건물의 소화율에서는 약용식물을 첨가함에 따라 증가하는 경향을 보였다(linear, P<0.004; quadratic, P<0.03). 결론적으로 포유모돈 사료내 약용식물의 첨가는 0.1%까지 첨가 급여시가 모돈의 체손실 감소 및 포유자돈의 증체량의 향상을 가져 왔으며, 이유자돈에서는 약용식물을 0.05-1.0% 첨가시 자돈의 성장율 및 건물의 소화율을 개선시키는 결과를 보였다. In Exp. 1, a total of forty eight multiparous sows were used in a 21-d performance assay. All litters were standardized at eleven piglets within 24h of parturition. Sows were fed one of the four experimental diets 1) CON(basal diet; Control), 2) MP1(basal diet added 0.05% of medicinal plant mixtures), 3) MP2 (basal diet added 0.1% of medicinal plant mixtures) and 4) MP3(basal diet added 0.2% of medicinal plant mixtures). Backfat thickness difference from farrowing to weaning was tended to increase in CON treatment compared to those of medicinal plants mixture(MP) treatments. However, there were not significant differences among the treatments(P>0.05). Sow’s ADFI was increased in sows fed MP2 treatment compared to MP3 treatment(P<0.05). Piglet weight gain was tended to increase in MP1 treatment compared to CON treatment(P<0.05). The glucose concentration of MP3 treatment was higher that of CON treatment(P<0.05). Exp. 2, a total of one hundred twenty weaning pigs ($L{\time}Y{\time}D$, 4.70$\pm$0.63kg average initial body weight) were used in a 20-d performance assay. Weanling pigs were fed treatments diets included 1) CON(basal diet; Control), 2) MP0.05(basal diet added 0.05% of medicinal plant mixtures), 3) MP0.1(basal diet added 0.1% of medicinal plant mixtures) and 4) MP0.15(basal diet added 0.15% of medicinal plant mixtures). Through entire experimental period, as MP increased in the diets, there was an increase in ADG(linear, P<0.067), improvement gain/feed(linear, P<0.018) and a decrease in ADFI (linear, P<0.008). DM digestibility was significantly increased with addition of MP(linear, P<0.004; quadratic, P<0.030). In conclusion, sows fed MP2 had showed less body weight loss and increased weight gain for suckling piglet. In weaning pigs, as supplementation MP from 0.05 to 0.1% in diet had improved growth performance and DM digestibility.
일반적인 플랜트에 대한 시간지연을 이용한 제어기법의 안정성 해석
권오석,장평훈,정제형,Kwon, Oh-Seok,Chang, Pyung-Hun,Jung, Je-Hyung 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.6
Time Delay Control(TDC) is a robust nonlinear control scheme using Time Delay Estimation(TDE) and also has a simple structure. To apply TDC to a real system, we must design Time Delay Controller to guarantee stability. The earlier research stated sufficient stability condition of TDC for general plants. In that research, it was assumed that time delay is infinitely small. But, it is impossible to implement infinitely small time delay in a real system. So, in this research we propose a new sufficient stability condition of TDC for general plants with finite time delay. And the simulation results indicate that the previous sufficient stability condition does not work even for small time delay, while our proposed condition works well.
핸드스프링 무릎굽혀 앞공중돌기와 무릎펴 앞공중돌기의 운동학적 분석
권오석(Oh Sok Kwon),오정환(Cheong Hwan Oh) 한국사회체육학회 2002 한국사회체육학회지 Vol.18 No.2
The purpose of this study was to compare hand-spring soalto forward tucked with hand-spring soalto forward picked; the change of center of gravity, the time required per pace, joint angle, angle speed, and joint speed. Three dimensional analysis method was used and the subjects who participated in this study comprised 4 gymnasts in college. Major findings of this study were as follows : 1. The center of gravity of hand-spring soalto forward tucked was higher than hand-spring soalto forward picked. 2. The time required per pace was almost similar at the 1st, 2nd, and the 3rd paces. At the 4th pace, hand-spring soalto forward tucked was 0.04 seconds faster than hand-spring soalto forward picked. At the 5th pace, hand-spring soalto forward picked was 0.03 seconds faster than hand-spring soalto forward tucked. 3. Average body joint angles such as elbow joint angle, shoulder joint angle, and hip joint angle per pace do not show big differences, however, at the 4th pace, knee joint angle was shown to be expended about expended position(72 degrees) was shown during hand-spring soalto forward tucked than hand-spring soalto forward picked. 4. Average angle speed per event was shown that during hand-spring soalto forward tucked elbow joint angle speed and shoulder joint angle speed were higher than those of hand-spring soalto forward picked. Meanwhile during hand-spring soalto forward tucked, hip joint speed and knee joint speed were higher that those of hand-spring soalto forward picked. 5. Average joint speed was shown that there is little difference between elbow joint speed and knee joint speed. Shoulder joint speed was relatively higher during hand-spring soalto forward tucked and hip joint speed was relatively higher during hand-spring soalto forward picked.
시간지연제어기법을 이용한 측 방향 미끄러짐 및 요 감쇠 보상 강인 조향 제어
권오석(Oh-Seok Kwon),이선봉(Seonbong Lee) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper we treat robust steering control using time delay control for the vehicle dynamics variation due to tire/road contact condition variation and lateral disturbance force due to side wind and yaw disturbance moment due to the difference between left tire's pneumatic pressure and right one's. And we deal with side slip and yaw damping compensation under fast steering at the high speed of vehicle. So we intend that a driver consider only path to go and do not have to consider vehicle dynamics variation, disturbances and undesired side slip and yaw oscillations. From the simulation results, we find out robustness for vehicle dynamics variation and disturbances when using time delay control and we evaluate side slip and yaw damping compensation capability under fast steering at the high speed of vehicle for the three control methods.
Multi zone Modeling 을 이용한 흡기관내의 과급이 온도성층화를 갖는 예혼합압축자기착화엔진에 미치는 영향에 관한 연구
권오석(O Seok kwon),임옥택(Ock Taeck Lim) 대한기계학회 2009 大韓機械學會論文集B Vol.33 No.4
The HCCI engine is a next generation engine, with high efficiency and low emissions. The engine may be an alternative to SI and DI engines; however, a pressure rise rate is a major limitation for high load range and power reduction. Recently, we were able to reduce the pressure rise rate using thermal stratification. Nevertheless, this was insufficient to produce high power. In this study, the reduction of the pressure rise rate using thermal stratification was confirmed and the HCCI engine power was increased using the boost pressure. The rate and engine power were produced by CHEMKIN and modified SENKIN. As a result of increasing the boost pressure, a higher IMEP was attained while the pressure rise rate increased only slightly in the HCCI with thermal stratification.