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USC 증기터빈용 LP Exhaust Hood 유동특성
이병은(Byeong E. Lee),김진환(Jin W. Kim),박구하(Koo H. Park),나운학(Un H. Nah),이수언(Soo E. Lee) 한국유체기계학회 2004 유체기계 연구개발 발표회 논문집 Vol.- No.-
CFD analysis has been performed to investigate flow behavior in LP exhaust hood of steam turbines and evaluate exhaust loss, which is directly related to the steam turbine performance, in it. Development of the optimum shape of LP exhaust hood has been done with an improved shape of steam guide, which plays a key role in terms of cost as well as performance. The newly developed LP exhaust hood will be applied for a large USC steam turbine having a capacity of 1,000 ㎿.
한국인 중증 외상 환자에서 촬영한 경추 외측면 단순 방사선 영상의 적절성
이경학 ( Kyung Hag Lee ),김영철 ( Yeong Cheol Kim ),최석호 ( Seok Ho Choi ),한국남 ( Gook Nam Han ),이수언 ( Soo Un Lee ),이정은 ( Jung Eun Lee ),서길준 ( Gil Joon Suh ),윤여규 ( Yeo Kyu Yoon ) 대한외상학회 2012 大韓外傷學會誌 Vol.25 No.4
Purpose: The objective of this study was to investigate the appropriateness of the cross table lateral cervical X-ray used in the emergency department for severely traumatized Korean patients. Methods: Patients visiting our institution from May 2011 to May 2012, who had injury severity score (ISS) > 15 and who received a cervical X-ray in the emergency department, were included in this study. Data including demographics, ISS score, GCS score, and place where the x-ray was taken were collected to evaluate their relationship with appropriate coverage of the cervical X-ray. The appropriateness of a cervical cross lateral view Xray was evaluated using exposure of the basion, and the opisthion, as well as the distal level of exposure. Results: Fifty-two patients were included in this study. The identification rate of the basion was 79.2%, and the identification rate of the opisthion was 88.7%. Complete exposure of C7/T1 was accomplished in 3.8% of the patients. The ISS was higher for X-ray taken in the trauma bay, but the range of exposure showed no difference between the places where the X-rays taken. Patients who had exposure of C 5/6 or more had lower body weight and body mass index (BMI) compared with unexposed patients. Conclusion: In severely traumatized Korean patients, the adequacy of the cross table lateral cervical X-ray was inappropriate in most cases. No difference was observed in the exposure range between the places where the X-rays were taken, and patients with less exposure showed higher body weight and higher BMI. (J Trauma Inj 2012;25:241-246)