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구동장치의 동강성을 고려한 미사일 조종날개의 비선형 플러터 해석
신원호(Won-Ho Shin),배재성(Jae-Sung Bae),이인(In Lee),한재흥(Jae-Hung Han),신영석(Young-Suk Shin),이열화(Yeol-Wha Lee) 한국항공우주학회 2005 韓國航空宇宙學會誌 Vol.33 No.2
구동기의 백래쉬와 동강성을 고려한 미사일 조종날개의 비선형 공탄성 해석이 수행되었다. 아음속 비정상 공기력 계산을 위해 DHM을 사용하였고 최소상태접근법을 사용하여 근사하였다. 비선형 플러터 해석을 위해 백래쉬는 유격으로 모델하고 기술 함수법을 사용하여 선형화하였다. 또한, 동강성은 주파수의 함수로 모터의 운동방정식으로부터 계산하였다. 선형 및 비선형 플러터 해석 결과들은 공력탄성학적 특성들이 백래쉬와 동강성에 중요한 영향을 받는다는 것을 보여준다. 비선형 플러터 해석에서 다양한 제한 주기 운동이 선형플러터 속도 이하에서 관측되었다. 또한 플러터 특성과 응답을 시간영역에서도 조사하였다. Nonlinear aeroelastic analyses of a missile control fin are performed considering backlash and dynamic stiffness of actuator. Doublet-Hybrid method is used for the calculation of subsonic unsteady aerodynamic forces, and aerodynamic forces are approximated by the minimum-state approximation. For nonlinear flutter analysis backlash is represented by a free-play and is linearized by using the describing function method. Also, dynamic stiffness is function of frequency and is calculated by solving equation of motion for actuator. The linear and nonlinear flutter analyses show that the aero elastic characteristics are significantly dependent on the backlash and dynamic stiffness. From the nonlinear flutter analysis, various types of limit cycle oscillations are observed in a range of air speeds below the linear divergent flutter boundary. The nonlinear flutter characteristics and the nonlinear aeroelastic responses are also investigated in the time domain.
중풍후유증 환자의 견통(肩痛)을 내궁계지탕가미방(川芎桂枝湯加味方)으로 치료한 치험 3례
신원용,현진오,최은영,강아미,김용형,조은영,한창호,임성우,이원철,최동준,Shin, Won-Yong,Hyun, Jin-Oh,Choi, Eun-Young,Kang, A-My,Kim, Yong-Hyung,Jo, Eun-Young,Han, Chang-Ho,Lim, Seong-Woo,Lee, Won-Chul,Choi, Dong-Jun 대한한방내과학회 2006 大韓韓方內科學會誌 Vol.27 No.4
Shoulder pain is a common problem after stroke. This study was done to examine the effect of Cheongungkyeoji-tang for three stroke patients with shoulder pain. Cheongungkyeoji-tang was prescribed for these patients suffering from shoulder pain. In the morning, the grade of shoulder pain was evaluated by visual analogue scale (VAS). Results were taken as three cases of effective treatment of shoulder pain with Cheongungkyeoji-tang. This study suggests that Cheongungkyeoji-tang is an effective treatment for shoulder pain after stroke.
최원림,신원한,조성진,김범태,최순관,변박장,Choi, Weon-Rim,Shin, Won-Han,Cho, Sung-Jin,Kim, Bum-Tae,Choi, Soon-Kwan,Byun, Bak-Jang 대한신경외과학회 2001 Journal of Korean neurosurgical society Vol.30 No.1
Objective : This study was undertaken to evaluate operative results and prognosis according to preoperative clinical status and histopathological finding of spinal cord tumor. Methods : We analyzed of clinical feature, tumor location, histopathologic finding, operative results and prognosis in 55 patients with spinal cord tumor during last 10 years. Results : 1) The incidence of spinal cord tumors varies with the age of affected patients who are 2 to 75 years of age. Peak incidences were in the 5th & 7th decade of life, and the ratio of male to female was 1.2:1. 2) The most common histopathologic type was neurinoma(41.9%). 3) The tumors were located most frequently in the thoracic area(22 cases, 40.0%) and in the intradural extramedullary space(30 cases, 54.5%). 4) The most common initial clinical feature was pain in 20 cases(36.4%). For neurologic status on admission, 30 cases(54.5%) showed motor disturbance. 5) In radiologic studies, there were abnormal finding in 21 cases from plain X-rays among 37 cases. The entire 20 cases in when myelography was done showed subarachnoid blockade, either complete or incomplete. The magnetic resonance imaging, regard as the most accurate diagnostic method, revealed the exact location of the tumor and the relationship of the tumor with the adjacent anatomical structure. 6) The total removal was possible in 36 cases(65.5%), subtotal removal in 17 cases(30.9%) and biopsy in 2 cases (3.6%). Nineteen cases(90.5%) among 21 cases with preoperative radiculopathy group showed recovery or improvement, where as only 11 cases(36.7%) among 30 cases with preoperative motor weakness group showed recovery or improvement, with statistically significant difference(p<0.01). Pathologically, 26 cases(83.9%) among 31 cases of neurinoma and meningioma showed postoperative recovery or improved, but only 1 case(6.3%) among 16 cases of metastatic tumor, astrocytoma and ependymoma recovered. Postoperative complication noted in 5 cases(9.1%), and were noted postoperative hematoma, pneumonia, pulmonary edema and spinal cord infarction. Conclusion : Preoperative neurologic status and histopathologic finding are considered important factors of Postoperative outcome in patients with spinal cord tumor.
시스템엔지니어링 수명주기를 고려한 도시철도 핵심장치 개발 전략
한석윤(Han Seok Youn),김진호(Kim Jin Ho),안태기(An Tae Ki),이우동(Lee Woo Dong),신원식(Shin Won Sik) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
Urban transit is a large scaled complex system which combines rolling stocks, power supply, signalㆍcommunications, tracks & stations etc. KRRI develops nine key devices since July, 2007 as a part of the second phase of project on the standardization of urban rail transit system, which include information-communication system, station facilities, AC-DC current electric power system in urban transit. We promote the project under two directions, i.e. user-customer oriented standardization and strategic standardization for leading technologies in urban transit. In this paper, we present development plan of these key systems in view of system life cycle based on system engineering standards KSX ISO/IEC 15288 which supplies the common fundamental frame to describe the life cycle of artificial systems. System engineering process of KSX ISO/IEC 15288 are helpful to efficiently develop those key devices, although it is difficult to apply the standard identically to the key devices with the varieties and characteristics.
급성기 중풍환자에서 음주습관이 중풍의 발생양상에 미치는 임상적 영향
최동준,현진오,신원용,김용형,강아미,이원철,전찬용,조기호,한창호,Choi, Dong-Jun,Hyun, Jin-Ho,Shin, Won-Yong,Kim, Yong-Hyung,Kang, A-My,Lee, Won-Chul,Jun, Chan-Yong,Jo, Ki-Ho,Han, Chang-Ho 대한한방내과학회 2007 大韓韓方內科學會誌 Vol.28 No.1
Objectives : This study investigated the clinical effect of a drinking habit in acute stroke patients. Methods : 409 acute stroke patients were included from October 2005 to October 2006. Patients were hospitalized within 14 days after the onset of stroke at DongGuk University International Hospital, Kyungwon University In-cheon Oriental Medical Hospital, or Department of Cardiovascular and Neurologic Diseases (Stroke Center), Kyung Hee University Oriental Hospital. We investigated general characteristics, drinking habit, and stroke subtype by TOAST classification. Results : Among drinking subjects, hemorrhagic stroke was more frequent than ischemic stroke (odds ratio 3.04), and less in small vessel occlusion than others (odds ratio 1.84). Ischemic stroke was associated with a longer (30 yrs) drinking habit than hemorrhagic stroke. Conclusions : To acquire more concrete conclusions on this theme, we need further and larger scale research.
고칼륨혈증으로 이뇨제 중단된 소변빈삭 환자의 한방치험 1례
최은영,현진오,신원용,강아미,김용형,한이수,김학재,최흥민,임성우,Choi, En-Young,Hyun, Jin-Oh,Shin, Won-Yong,Kang, A-My,Kim, Yong-Hyung,Han, I-Su,Kim, Hak-Jae,Choi, Heung-Min,Lee, Seong-Woo 대한한방내과학회 2006 大韓韓方內科學會誌 Vol.27 No.3
Spironolactone reduces potassium excretion in renal collecting ducts and causes hyperkalemia. A 66-year-old female with urinary incontinence had to discontinue diuretics for hyperkalemia. After treatment with Jesaengsinkihwan-gagambang. she reduced urinary incontinence and her total urine volume was increased. BUN decreased from 32.2 to 16 and creatinine decreased from 1.5 th 0.9. So. we report one case of urinary incontinence with discontinuance of diuretics for hyperkalemia treated with Jesaengsinkihwan-gagambang.