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대호 (大湖) 저수지 (貯水池) 퇴적토의 (堆積土) 탈질화 (脫窒化) 세균과 탈질화 (脫窒化) 작용능에 미치는 환경요인
고유석,안태영 ( You Seak Go,Tae Young Ahn ) 한국하천호수학회 1992 생태와 환경 Vol.25 No.3
The denitrifying potential and various environmental factors were investigated and the influence of environmental factors on the distribution of denitrifying bacteria and potential was analyzed through stepwise multiple regression in the sediment of lake Daeho. The N_2O production was measured with gas chromatography at in situ temperature by acetylene blockage method and the N_2O production rates were 0∼9.18㎍-N/g-dw/day. The genera that showed denitrification potential were identified as Pseudomonas, Corynebacterium, Flavobacterium, etc. It was shown through statistical analysis that the environmental factors affecting the variation of denitrifying bacteria and potential differed with stations. NO_3 was used as a terminal electron acceptor, however terminal electron acceptor could be changed by environmental factors.
[차량운동성능부문] 차량 동역학을 고려한 차량용 댐퍼 해석 프로그램 개발
고유석(Yoyseok Koh),조길준(Giljoon Cho),심정수(Jeongsoo Shim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The shock absorber is an important automotive part, which affect the comfort and the stability of the vehicle. In this paper, a physical model is developed to accuont for the nonlinear behavior of the auto-motive shock absorber. The quarter and half car models are constructed with the commercial GUI(Graphic User Interface) package. Instead of using a simple damper model with a damping coefficient, a shock absorber model which considers the compressibility of the oil and the variable gas phase in the shape of the bubbles, is linked with the vehicle model.<br/> Under the several driving conditions such as ride and steering motion, the internal architecture(valve parameters and hysterisis effects) of the damper and the vehicle motion are identified. This program can be applied to the design and the analysis of the various automotive shock absorber which affects the vehicle dynamics.
Suspension system과 Braking system을 이용한 UCC system 개발에 관한 연구
고유석(Youseok Kou),김완일(Wanil Kim),김동신(Dongshin Kim) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Purpose of this work is for developing UCC system to enhance vehicle stability and driving comfort through vehicle test and computer simulation. The system characteristics of suspension control systems(CDC system for damping control and Rear Wheel Steering system for rear slip angle) are analyzed and that of ESP system is discussed for braking control system. The integrated control of the respective systems is applied to reduce the cost of the sensor and enhance the vehicle performance, This study will present the base of the development of UCC.
CDC 시스템의 Yaw 제어를 통한 UCC 시스템 구현
고유석(Y.S.Kou),두민수(J.W.Lee),김완섭(W.I.Kom),김완일(W.S.Kim),이정우(M.S.DOO) 한국자동차공학회 2002 한국자동차공학회 Symposium Vol.2002 No.11
A vehicle suspension control system is newly evaluated in terms of enhancing vehicle stability and handling with braking control system CDC system is used to distribute the damping forces bet wren front and rear axles .which has effect on the vehicle yaw rate with ESP(Electric Stability Program), CDC system mitigates the over-steer and the under-steer tendencies during quick transient maneuver while ESP plays a same role in the unstable area of vehicle.<br/> Both systems can share control information through CAN and cooperate to achieve improved performance. The basic principle of system operation is explained based on CDC system, ESP and the vehicle dynamics. The computer simulation and the vehicle test result are presented to show the effect of damper setting on the vehicle characteristics and demonstrate the benefit of the proposed yaw control algorithm.
김호림,고유석 세계섬학회 2022 World Environment and Island Studies Vol.12 No.1
This study attempted to reinterpret the meaning of the Roh MooHyun Jeju-Declaration in accordance with the age of artificial intelligence based on the liberal theory. In the era of artificial intelligence, a new aspect of the U.S.-China hegemonic competition was considered. The Roh MooHyun Declaration, which declared Jeju Island a peaceful island, was reinterpreted from three points of view of liberal theory. This study presented the necessity and orientation of the World Peace Island Network International Organization.
가축분뇨를 이용한 SCP 생산 균주의 분리 및 균체 단백질 생산
한석균,고유석,안태영,배동훈 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.6
질소원으로서 계분을 이용하는 균주를 선별하고 계분배지에서 균체의 생육속도가 다른 균주에 비하여 우수한 균주를 분리하였다. 형태·생리학적 특성을 기초로 하여 yeast의 분류 기준과 비교하여 본 균주를 Candida sp.로 동정하였으며 본 균주를 Candida sp. D116으로 명명하였다. Poultry feces extract medium에서 4% 농도의 glucose 첨가가 균체 생육에 효과적이었다. D116 균주를 액체 발효하여 균체생산능, 요산 그리고 가용성 단백질의 변화를 조사하였다. 그 결과 약 60시간이 경과하면 액체 발효 배지내의 거의 모든 가용성 단백질 및 요산의 감소를 보였으며 균체생육은 약 36시간 배양하였을 때 최고조에 도달하였고 그 후에는 점차 감소하는 경향을 보였다. SCP의 대량생산의 결과 50%의 계분혼합 배지와 30℃의 배양 온도에서 36시간 배양하여 균주의 생육수준이 3.8×10^9 CFU/ml 농도의 균체를 생산하였고 200 L의 배양액중 약 870 g-dw의 균체를 얻었으며 생산된 군체의 조단백질 함량은 67%이었다. Production of Single Cell Protein from Poultry Feces. Suk-kyun Han, You-Suk Go, Tae-Young Ahn and Dong-Hoon Bal^1*. Deparment of Microbioligy, College of Natural Sciences, Dankook Univerity, Cheonan 330-714 and Research Center for Molecular Microbiology, Seoul Nationa University, Seoul 151-742, Korea, ^1Department of Food Engineering. College of Engineering, Dankook University, Cheonan 330-714 and Bioproducts Research Center of Yonsei University, Seoul 120-749, Korea - From the soil collected form provincial area of South Korea, a microorganisms which have been shown good growth in the minimal poultry feces extract medium was isolated. Supplement of glucose to the poultry feces extract medium helped the complete degraded during the microbial growth. Maximum cell growth (3.8×10^9 CFU/ml) obtained at 36 hours of incubation after inoculation. Uric acid was degraded faster in minimal medium that in the glucose complement medium. VFA (volatile fatty acid), which are known as major compounds of poultry feces odor, were almost removed from the minimal poultry feces extract medium. Glucose supplement to the minimal medium enhanced the growth of microbial cells. Addition of 4% of glucose and 4% of neopeptone to the minimal poultry feces extract medium helped the maximal growth of cells.