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Broiler 의 품종별 산육성에 관한 연구 3 . Cage 와 평사에서 사육한 Hubbard 종의 산육성
박형기(H . K . Park),유성열(S . Y . Yoo),유용걸(Y . G . Yu) 한국축산학회 1993 한국축산학회지 Vol.35 No.4
Among the broiler breeds in Korea, Hubbard was chosen to be raised in cage and on floor and 6 chicks of each randomly chosen out of 640 were slaughtered at the 5th, 6th and 7th week, respectively to examine the meat productivity. Heaiver body weights of the male in the floor group while for the female in the cage group. Heavier body weights of the males were found in the floor group and those of the females in the cage. However, males showed heavier live weight than females in both feeding system. Average carcass percentage based on the live weight was 70.9%. Greater carcass percentages were found in the floor male and cage-fed female groups, respectively. Lean weight was 56,4 percentage of the carcass weight. Male was greater to female. Edible portion was greater in male and in the floor broiler group. Cage males and floored females tended to deposit more fat in the body. It is recommeded to raise male broilers in floor while females in cage system.
Broiler 의 품종간 산육성 (産肉性) 에 관한 연구 2 . 평사 사육에 의한 Arbor Acres 와 Maniker 종의 산육성
박형기(H . K . Park),유성열(S . Y . Yoo),유용걸(Y . G . Yu) 한국축산학회 1993 한국축산학회지 Vol.35 No.2
Two broiler breeds, Arbor Acres and Maniker, were Moor-fed trod 6 chicks of each sea randomly chosen out of 640 were slaughtered at the 5th, 6th, and 7th week, respectively to examine the meat productivity. Arbor Acres weight 4.6% more than Maniker as far as the breeds difference in live weight is concerned and Males in both breeds weighed 17% more than female in live weight. Weights of carcass against live weights amounted 70% in both varieties regardless of sex. Lean meat From carcass weight was 54% on the average in both breeds and sexes. Arbor Acres yielded higher meat productivity than Maniker. Males had meat productivity from 15 to 26% higher than females. In addition, the ratio of edible portion was higher in Arbor Acres than in Maniker. The rate of fat deposit in comparison with carcass weight was higher percent io female and male of Maniker, than that of Arbor Acres.
박국남(K.N. PARK),박종학(J.H. PARK),이정영(C.Y. LEE),김학노(H.R. KIM),유성연(S.Y. YOO) 한국유체기계학회 2006 유체기계 연구개발 발표회 논문집 Vol.- No.-
The Fuel Test Loop(FTL) has been developed for the irradiation test of nuclear fuels. The FTL provides the test conditions similar to the operation conditions of the PWR and CANDU nuclear plants. The FTL consists of In-Pile Test Section(IPS) and Out-of-Pile System(OPS). The IVA(IPS Vessel Assembly) could be divided into an external assembly and an interior assembly from a total assembly. IVA is to dual pressure vessel which nuclear fuel is assembled on interior. For a domestic production characteristic confirmation and a design verification IVA mock-up it produced. IVA mock-up where it is produced were used in vibration test and differential pressure test. In order to verify the pressure-drop prediction in the IVA, a series of pressure-drop test has been carried out by using the IVA mock-up. As a result of the experiment, it is found that the measured pressure drop shows a good agreement with the calculated pressure drop.
탈질공정을 갖는 가스엔진 열병합발전시스템 배기가스 환원분위기 조성용 후연소버너 최적화 연구
최재준(J. J. Choi),김혁주(H. J. Kim),박화춘(H. C. Park),정대헌(D. H. Chung),박병식(B. S. Park),송대섭(D. S. Song),유성연(S. Y. Yoo) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
The instable oil price makes seek the more efficient energy machine and energy system. CHP(combined heat and power) system is the most favorable alternative choice among the energy saving systems but the severe emission regulation for the CHP system is an another challenge thing. Because of the need for the Ultra Low NOx CHP system, the efforts for reducing the toxic emission including NOx and CO are continuously investigated. The cogeneration hybrid system was developed by the need for the low NOx CHP system at the previous work, but the huge amount of the total fuel considering conventional CHP system, the after-burner which is a component of the cogeneration hybrid system was optimized to minimize the fuel consumption. In this experiment, the after-burner was re-optimized by the fuel supply minimization and engine exhaust gas-fuel flow distribution optimization. All the condition was optimized and adjusted to meet the exhaust gas condition, below 1% O₂ amount and 300-2000ppm CO. The optimized cogeneration hybrid system can meet the current NOx level and exhaust gas regulation and it will achieve the clean combustion gas and efficient cogeneration system.
Polypropylene/Montmorillonite Nanocomposite 의 합성과 구조 분석
유성구,서길수,류종하,박영해 嶺南大學校 工業技術硏究所 1998 工業技術硏究所論文集 Vol.26 No.1
Polypropylene/Montmorillonite Nanocomposite has been prepared by two methods. One is the melt-mixing of three components, i.e., PP, maleic anhydride modified polypropylene oligomers, and clays. And the other one is annealing method of three components under vacuum. The structure of nanocomposite were investigated by using a transmission electron microscopy. It was found that maleic anhydride modified polypropylene oligomers were important to achive the polypropylene/ontmorillonite nanocomposite. And nanocomposite exhibit higher thermal stability compared to that of pure PP.