http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이정상(J. S. Lee),김종암(C. Kim),노오현(O. H. Rho) 한국전산유체공학회 2003 한국전산유체공학회지 Vol.8 No.2
In this work, we propose a new idea of flapping airfoil design for optimal aerodynamic performance from detailed computational investigations of flow physics. Generally, flapping motion which is combined with pitching and plunging motion of airfoil, leads to complex flow features such as leading edge separation and vortex street. As it is well known, the mechanism of thrust generation of flapping airfoil is based on inverse Karman-vortex street. This vortex street induces jet-like flow field at the rear region of trailing edge and then generates thrust. The leading edge separation vortex can also play an important role with its aerodynamic performances. The flapping airfoil introduces an alternative propulsive way instead of the current inefficient propulsive system such as a propeller in the low Reynolds number flow. Thrust coefficient and propulsive efficiency are the two major parameters in the design of flapping airfoil as propulsive system. Through numerous computations, we found the specific physical flow phenomenon which governed the aerodynamic characteristics in flapping airfoil. Based on this physical insight, we could come up with a new kind of airfoil of tadpole-shaped and more enhanced aerodynamic performance.
이재욱 ( Lee Jae Ug ),장혜련 ( Jang Hye Lyeon ),손민정 ( Son Min Jeong ),박정환 ( Park Jeong Hwan ),주권욱 ( Ju Gwon Ug ),김연수 ( Kim Yeon Su ),안규리 ( An Gyu Li ),한진석 ( Han Jin Seog ),김성권 ( Kim Seong Gwon ),이정상 ( Lee J 대한신장학회 2004 Kidney Research and Clinical Practice Vol.23 No.1
배 경 : 신혈관성 고혈압의 치료로 최근 경피적 혈관성형술 및 우회술 또는 혈관 이식술 등의 수술적 치료가 활발히 시행되고 있으며, 이에 따라 치료 후 혈압과 신기능에 있어 그 효과가 주목되고 있다. 이에 저자들은 신혈관성 고혈압의 원인 질환을 알아보고 치료 방법에 따른 예후를 평가하고자 하였다. 방 법 : 서울대학교병원 내과에서 1983년 1월-2002년 12월까지 혈관조영술과 기능검사로 확진된 신혈관성 고혈압 환자를 대상으로 6개월 이상 추적 관찰이 이루어진 환자들의 기저 질환과 치료 반응에 따른 예후를 평가하였다. 결 과 : 74명 중 남녀는 각각 37명이었으며, 진단 시의 평균 연령은 40 (12-77)세였다. 원인 질환으로는 죽상경화 31명 (41.9%), Takayasu 동백염 21명 (28.4%), 섬유근 이형성증 14명 (18.9%), 기타 8명 (10.8%)이었다. 내과적 치료를 받은 환자는 25명(33.8%), 방사선학적 중재술을 받은 환자는 29명 (39.2%)이었고, 수술적 치료를 받은 환자는 20명(27.0%)이었다. 치료군의 진단 당시 혈압은 각각 185.9±26.3/115.0±20.2 mmHg, 188.9±23.7/116.6±20.9 mmHg, 192.7±23.1/118.2±19.0 mmHg, 진단 당시 혈청 크레아티닌은 각각 1.5±1.0 ㎎/dL, 1.2±0.7 ㎎/dL, 1.4±0.6 ㎎/dL로 유의한 차이가 없었다. 내과적 치료를 시행한 환자 25명에서 평균 82±64 (6-253)개월 후의 혈압은 150.0±20.3/88.7±13.6 mmHg로 감소하였고 (p<0.05), 혈청 크레아티닌 (2.3±3.6 ㎎/dL)은 치료 전과 차이가 없었다. 방사선학적 중재술을 받은 환자 29명에서 평균 60±48 (6-185)개월 후의 혈압은 141.9±24.4/88.3±17.4 mmHg로 감소하였고 (p<0.05), 고혈압의 완치 9명 (31.0%), 호전 14명 (48.3%)이었다. 신기능은 악화된 환자가 2명 (6.9%), 유지된 환자 20명 (69.0%), 호전된 환자 7명 (24.1%)이었다. 수술적 치료를 받은 환자 20명의 평균 95±62 (6-228)개월 후의 혈압은 150.1±25.6/91.7±11.5 mmHg로 감소하였고 (p<0.05), 고혈압의 완치 2명 (10.0%), 호전 13명 (65.0%), 무반응 5명 (25.0%)이었다. 이들 중 신기능이 악화된 환자는 3명(15.0%), 안정적으로 유지된 환자는 13명 (65.0%), 호전된 환자는 4명 (20.0%)이었다. 결 론 : 죽상경화가 신혈관성 고혈압의 가장 흔한 원인 질환임을 확인할 수 있었고, 내과적 치료와 방사선학적 중재술 및 수술적 치료가 모두 혈압의 조절 및 신기능의 보존에 우수한 성적을 보임을 알 수 있었다. Background : Renovascular hypertension has variable etiologic diseases and therapeutic outcomes. We performed a retrospective analysis of the causes and treatment results of renovascular hypertension to elucidate long-term prognosis with respect to blood pressure and renal function. Methods : We reviewed patients who were admitted to Seoul National University Hospital for evaluation of renovascular hypertension in period from January, 1983 to December, 2002. Diagnosis of renovascular hypertension was made by combination of positive functional studies such as captopril renal scintigraphy and/or captopril test and angiographic demonstration of significant stenoses in one or both or renal arteries. Patients who were followed up for more than six months were included and classified according to the etiologic disease and treatment modalities. Responses of blood pressure and renal function in each patient were periodically evaluated. Results : Of 74 patients included, 37 were male and 37 were female. The median age of the patients was 40. Atherosclerotic renal artery stenosis was the most common diagnosis (31, 41.9%), followed by Takayasu‘s arteritis (21, 28.4%) and fibromuscular dysplasia (14, 18.9%). Control of blood pressure and preservation of renal function were significant in medical, radiological, and surgical therapy group. There was no significant difference in response of blood pressure and renal function to treatment among treatment groups. Poor response of blood pressure and deterioration of renal function were observed more frequently in patients with atherosclerotic renal artery stenosis than in those with Takayasu`s arteritis or fibromuscular dysplasia. Conclusion : Atherosclerosis was the most common etiologic diagnosis of renovascular hypertension. Medical treatment showed satisfactory treatment results as compared to radiologic and surgical revascularization. Pathients with atherosclerotic renal artery stenosis showed poorer control of blood pressure and preservation of renal function. (Korean J Nephrol 2004;23(1):66-74)
신기능장애 및 혈액투석환자에서의 Pyrazinamide 의 약력학적 연구
김대중(D . J . Kim),김성권(S . K . Kim),이정상(J . S . Lee),한용철(Y . C . Han),이문호(M . H . Lee),이선희(S . H . Lee),신상구(S . G . Shin),박찬웅(C . W . Park) 대한내과학회 1986 대한내과학회지 Vol.31 No.1
The pharmacokinetics of single oral dose(lgm) of pyrazinamide was studied in 20 patients with various degrees of renal insufficiency including 6 patients on long-term hemodialysis. The average 24 hr urinary recovery of pyrazinamide in patients with creatinine clearance 10 to 30 ml/hr/kg, and patients with creatinine clearance lesser than 10 ml/hr/kg were 7.5 and 0.9% of administered dose respectively. Serum half-life of the drug was slightly, but significantly(p<0.05), prolonged in patients with creatinine clearance lesser than 10 ml/hr/kg(half-life; 11.25±2.55 hr) compared with normal subjects(half-life; 8.21±1.38 hr) previously reported. The mean serm half-life of pyrazinamide in patients on longterm hemodialysis was 12.26±2.92 hr. The half-life fell to 3.52±1.17 hr during hemodialysis. It was estimated that approximately 41% of drug in the body was removed into dialysate during 4 hr dialysis. The mean dialysance of pyrazinamide was 91.40±2.83 ml/min. From the observed pharmacokinetics of pyrazinamide in patients with impaired renal function, it is suggested that adjustment of dosage regimen may not be required for patients just with impaired renal function. However, replacement of dialysed fraction of pyrazinamide would be required for the maintenance of adequate serum level.
진호준(H . J . Chin),안규리(K . L . Ahn),오국환(K . H . Oh),오윤규(Y . K . Oh),김연수(Y . S . Kim),한진석(J . S . Han),김성권(S . K . Kim),이정상(J . S . Lee) 대한내과학회 1997 대한내과학회지 Vol.52 No.4
It has been known that most patients with Korean Hemorrhagic Fever (KHF) were recovered without any significant renal complication. But several cases of renal hypertension, chronic pyelonephritis, and chronic renal failure after KHF have been reported. Recently, we experienced one case of chronic pyelonephritis as a sequela of KHF, which has been diagnosed at the 78th month of illness. This case showed reduced thickness of renal parenchyme, small and irregular shaped kidney, focal loss of normal cupping of calyces, and accumulation of radiacontrast media at distal calyes by IVP. This case suggested that chronic pyelonephritis may develop as a sequela of KHF,
김연수(Y . S . Kim),이중건(J . G . Lee),정윤철(Y . C . Jung),이진학(J . H . Lee),최영진(Y . J . Choi),안규리(C . Ahn),한진석(J . S . Han),김성권(S . Kim),김병국(B . K . Kim),이정상(J . S . Lee),이현순(H . S . Lee) 대한내과학회 1994 대한내과학회지 Vol.46 No.2
Castlemam's disease is an asymptomatic and benign lymph node hyperplasia which is frequently manifested as mediastinal mass in over 70% of cases. Amyloidosis is rarely associated with Castleman's disease. Recently we experienced a patient with nephrotic syndrome due to renal amyloidosis who had been previously diagnosed as Castleman's disease of retroperitoneal lymph node enlargement. A 47-year old woman was admitted because of generalized edema and chest tightness. Five months ago she diagnosed as Castlman's disease-plasma cell type, of retroperitoneal lymph node enlargement. The patient was followed up through outpatient department without any specific medication. Physical examination showed pale conjunctivae, palpable mass on epigastric area and pretibial pitting edema. The hemoglobin, leukocyte count and erythrocyte sedimentation rate were 96 g/L, 5.9×109/L and 127 mm/hour, respectively. The blood urea nitogen was 3.6 mmol/L and creatinine was 88 umol/L. The urinalysis showed 3 positive for albumin. Twentyfour hour urine contained 16.6 grams of protein. A computerized tomographic (CT) scan of the abdomen disclosed multiple lymph node enlargement at mesentery. Percutaneous needle biopsy of kidney showed massive infiltration of pale pinkish amorphous material in the glomerular tuft forming large nodules. Ultrastructural examination exhibited heavy deposition of amyloid fibrils in the mesangium and perpendicular to glomerular basement membrane. Polarizing microscopy with Congo-red stain revealed prominent yellow green birefringence in glomeruli, tubules and interstitium.