• 자원환경지질
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• 제41권2호
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• pp.211-217
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• 2008

육상 및 해상에서 측정된 중력자료와 GRACE 인공위성으로부터 계산된 중력자료를 구면캡 조화분석(Spherical Cap Harmonic Analysis; SCHA)을 이용하여 통합하였다. 중력자료는 한국지질자원연구원에서 측정된 육상중력과 한국해양연구원과 국립해양조사원에서 측정된 해상자료를 이용하였으며, GRACE 인공위성 자료로는 구면조화함수의 계수형태로 되어있는 L-2 level 자료를 이용하여 중력이상값을 계산하였다 0.05도 간격으로 격자화 된 중력자료의 해상도와 구면캡 조화계수의 해상도를 일치시키기 위하여 조화계수를 order 80까지 설정하였으며 Generalized Minimal Residual (GMRES) 역산방법을 이용하여 구면캡 조화계수를 계산하였다. 이 계수로부터 다시 중력이상을 구한 결과 육상 및 해상자료와 0.950,그리고 GRACE 인공위성 자료와 0.995의 매우 높은 상관관계를 보여주어 본 연구의 방법이 매우 잘 적용 되었음을 알 수 있었다. 구면캡 조화분석의 적용으로 중자력 자료의 특성인 라플라스 방정식을 만족함으로써, 측정된 고도 이외에 다른 고도에서도 중력값을 계산할 수 있으며, 본 연구에서는 10 km에서 60 km 고도까지 중력이상을 계산하였다. 각 고도에서 매우 안정적인 결과를 얻을 수 있었으며, 인공위성 자료의 특성인 우수한 저주파성분과 육상 및 해상에서 측정된 자료의 상세한 고주파 성분이 매우 잘 융합되어 있는 것을 볼 수 있었다. 본 연구의 방법을 이용하여 여러가지 고도의 자료를 한꺼번에 통합할 수 있으므로 항공중력 둥의 자료가 추가될 경우, 더욱더 상세하고 안정적인 중력이상값을 계산 할 수 있을 것으로 기대된다.

• 지구물리
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• 제9권3호
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• pp.181-188
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• 2006

The data, methodology, and the resulting accurate gravimetric geoid model for the Korean Peninsula (latitude from 32˚ N to 40˚ N and longitude from 124˚ E to 131˚ E) are presented in this study. The types of used data were a high degree geopotential model (the EGM96 spherical harmonic coefficient set), a set of 12,615 land gravity observations, 1,056,075 shipborne gravity observations, and KMS2002 gravity anomalies from satellite altimetry. The remove-restore technique was successfully applied to combining the above mentioned data sets using up to degree and order 112 of the EGM96 coefficient. The residual geoid was calculated with residual Free-Air anomaly values using the spherical Stokes' formula with a 37-km integration cap radius. The geoid model was referred to WGS84 geodetic system and was tested using a set of GPS/levelling geoid undulations. The absolute accuracy is 0.132 m and some improvement compared to the PNU95 geoid model was found.

• Journal of Chest Surgery
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• 제20권1호
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• pp.218-222
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• 1987

Unroofed coronary sinus syndrome is an uncommon anomaly, Unroofed coronary sinus syndrome is caused by incomplete formation of the left atriovenous fold, and it usually is associated with Left SVC. If it is not diagnosed, a residual reversed or bidirectional shunt will result, and its complications will reduce life expectancy. We experienced 3 cases of unroofed coronary sinus syndrome which combines TOF with PLSVC, partial ECD, primum type ASD. In case of Unroofed coronary sinus syndrome which combines TIF with PLSVC, preoperative diagnosis was not made. In corrective operation for TOF of this case, pump weaning was failed due to hypoxia and cardiac arrest, and he expired at operation room. At autopsy of this case, complete unroofed coronary sinus was found. In the other 2 cases, partial unroofed coronary sinus syndrome was found in operation field and corrective operation was performed successfully. We report these 3 experiences with its review. ^u ++ Noninvasive Assessment of Pressure Gradients across Prosthetic Heart Valve by Doppler Ultrasound - A comparative study of the Duromedics Bileaflet Valves in mitral position and Normal Mitral Valves -with its review.

• Journal of Chest Surgery
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• 제21권4호
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• pp.649-655
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• 1988

One hundred and one patients with tetralogy of Fallot who were older than 16 years of age underwent a total correction of the anomaly between May, 1964 and July, 1987. This group comprised 14.9% of the 679 consecutive patients who had repair of the tetralogy at our institution during the same period. Of the 101 patients, 8 had a previous shunt procedure for palliation. The preoperative mean hemoglobin value was 16.9*1.0% and the mean systemic oxygen saturation, 84.4*0.9%. In 76 patients[75.2%], a type II ventricular septal defect was seen whereas in 14 patients[13.9%], the defect was type I. In 72 patients[71.3%], other cardiac anomalies were present which included patent foramen ovale in 37.6%, atrial septal defect in 8.99b, vegetations in 6.9%, right sided aortic arch in 5.9% and coronary artery anomaly in 5.0%. The right ventricular outflow obstruction was caused most commonly by combination of infundibular and valvular stenosis[74.3%], followed by isolated infundibular stenosis[19.8%] and valvular stenosis [5.9%] alone in order. The preoperative mean diameter of the pulmonary valve ring size was 10.2*0.5 mm in diameter. A transannular patch enlargement of the right ventricular outflow tract was performed in 28 patients and, in 12 a pericardial monocusp was utilized. Major anomalous aorto-pulmonary vessels were encountered in 5 patients which were detected before or during the operation. In 3 patients, they were ligated beforehand to control the flooding of the operative field. Postoperatively, the mean systolic pressure gradient between the right ventricle and the main pulmonary artery was 16.2*2.3 mmHg and the mean systolic pressure- ratio between the right and the left ventricle was 45.3*2.0%. Perioperative complications including bleeding in 8.9%, pleural effusion in 7.9%, dysrrhythmia in 4.9%, and residual VSD in 4.0%. Operative mortality was 8.9%. There has been no operative death in the recent 65 cases since 1981. There were 2 late deaths, 68 and 113 months after surgery. There were 2 late detachment of the VSD patch during the follow-up period. Of the 6 patients with patch detachment found during the postoperative period, 3 had subacute bacterial endocarditis before or after the operation indicating The serious nature of this complication. Two of these patients subsequently underwent a successful reoperation.

• 한국수자원학회논문집
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• 제39권1호
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• pp.35-46
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• 2006

본 연구에서는 안전하고 원활한 용수공급을 목적으로 하는 상수도관망시스템의 오염예방 및 위험관리를 위한 통합의사결정시스템의 기본구조를 제시하고 유럽과 미국에서 널리 사용되고 있는 다기준 의사결정기법인 PROMETHEE와 ANP를 적용해 상수도관망의 이상징후 판정을 위한 위험요소들의 우선순위를 평가하였다. 문제 구성을 위하여 pH 잔류염소농도, 유량, 수압, 전기전도도, 탁도, 블록누수량, 수온을 자료항목으로 선정하였고 관부식, 관파열, 관내수질오염을 평가기준으로 하여 PROMETHEE와 ANP의 결과를 비교 분석하였다. 본 연구에서 제시한 상수도관망의 위험요소 평가결과는 위기상황 대처방안시스템 구축시 사고대응 제어알고리즘 설계의 기초자료가 될 수 있을 것이다.

• Journal of Chest Surgery
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• 제30권2호
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• pp.226-230
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• 1997

본 증례는 잦은 상기도 감염을 보였던 마제상폐를 동반한 양측성 엽내형 폐격리증의 성공적 치료에 대한 보고이다. 단순 흉부X-선상 양측 폐하엽 에 폐렴정 경화와 침윤을 보였으며 흉부전산화단층촬영상 폐격리증에 합당한 다발성 낭성병변을 보였다. 대동맥조영술에서 횡격막 상부에서 시작되어 양측 격리 폐로 유입되는 2개의 기 형체동맥을 관찰할 수 있었다. 좌측 개흉술을 통하여 좌측과 우측의 격리폐로 유입되는 체동맥을 결찰후 분리하고 좌하엽의 폐엽절제술을 시행한 다음 마제상폐의 협소부를 분리절 제후 우측 격리폐는 남겨두었다. 환자는 수술후 10일째 퇴원하였으며 잔류 우측 곁리폐의 합병증이나 증상없이 추적관찰중이다. 수술후 5개월깨 시행한 흉부전산화단층촬영상 남겨두었던 잔류 우측 격 리폐 는 자연 소실되었음을 관찰할수 있었다 본 증례로 보아 합병증이 없는 엽내형 격리폐에서 폐엽절제술 을 시행하지 않고 기형체동맥을 결찰분리만하는 새로운 치료방법을 제안해 보는 바이다.

• Journal of Chest Surgery
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• 제24권2호
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• pp.115-122
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• 1991

From April 1986 to December 1989, 25 infants under the age of 12 months with tetralogy of Fallot were operated on. Age ranged from 3 to 12 months[mean 8.9$\pm$4.9 months] and mean body weight was 7.8$\pm$ 2.6kg. All the patients were deeply cyanotic, 12 of them experienced anoxic spell. Transannular patch was laid down in 19 patients, in 7 of them monocuspid patch was utilized. Postrepair P RV/LV was measured at operation room in 17 patients[mean 0.48$\pm$0. 14]. Hospital mortality was 20Yo. Causes of deaths include right ventricular failure and low cardiac output. The mortality was closely related with patient`s age and body surface area at operation. Also higher mortality was noticed in patients having major associated anomaly or previous palliative operation, preoperative management with propranolol and transannular repair. 18 patients were followed up for 12 to 50 months with a mean follow-up time of 24 months after operation. There were no late deaths and late ventricular arrhythmia or congestive heart failure was not detected as yet. Redo operation was performed in one case because of residual pulmonic stenosis. Considering several advantages of early primary repair, primary repair of symptomatic infants with tetralogy of Fallot should be encouraged despite somewhat high mortality rate as yet and better results could be anticipated along with improvement of myocardial protection method and postoperative care.

• Journal of Chest Surgery
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• 제14권3호
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• pp.254-259
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• 1981

This is a case of successfully surgically treated RVOT obstruction caused by projection of the herniated aortic cusp through subpulmonic supracristal VSD at Department of Thoracic and Cardiovascular Sugery, Hanyang University Hospital. The patient was a 17 year old boy. Congenital heart anomaly was suspected at 2 years of his age. He had palpitation, dyspnea on exertion and epistaxis for 2 years prior to admission to our hospital. On examination, the blood pressure was 170/0mmHg. And the pulse rate was 100/rain. Widening of pulse pressure, water hammer pulse [bounding pulse]. To and fro murmur and head nodding were noted. Cardiomegaly was seen in chest x-ray. EKG, Echocardiography, Cardiac catheterization and angiocardiography were performed. On April 27, 81. Open heart surgery was performed under the impression of VSD combined with AI. On Rt. ventriculotomy, we noticed RVOT obstruction caused by prolapsed rt coronary cusp through a VSD. The subpulmonic supracristal VSD measuring 2.5 x 3 Cm in diameter was closed with Teflon patch graft and then the prolapsed aortic leaflet was plicated by placing three 8-figure suture between the free edge and the base of the leaflet through transverse aortotomy. After operation, excellent result was obtained: B.P, was 110/50mmHg and any sign of AI or residual shunt was not found at discharge.

• Journal of Veterinary Science
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• 제23권4호
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• pp.39.1-39.5
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• 2022

Patent ductus arteriosus (PDA) is a rare congenital cardiovascular anomaly in cats. Due to their small body, intercostal thoracotomy is the most common option to close the PDA. However, few reports detail the surgical technique for ligating PDA in kittens. In this case report, three cats weighing 1.4 kg, 1.2 kg, and 2.9 kg were diagnosed PDA. Clip ligation via left fourth intercostal thoracotomy was performed and the cats were successfully treated. Postoperative echocardiography showed no residual flow in any of the cases. This case report highlights clip occlusion for small cats with PDA could be safe and effective.

• 자원환경지질
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• 제2권2호
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• pp.1-35
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• 1969

미합중국(美合衆國) Connecticut의 Triassic 기분지(紀盆地)에 대하여 중력탐사방법(重力探査方法)에 의(依)한 지하지질구조(地下地質構造) 및 퇴적과정(堆積過程)을 규명하였다. 총측점수(總測點數) 약(約) 800 점(點)에 대한 중력측정치(重力測定値)를 Bouguer 방법(方法)에 의(依)한 Bouguer 중력이상도(重力異常圖)를 작성(作成)하였으며 7개(七個) 중력단면도(重力斷面圖)를 선정(選定)하여 지하지질구조(地下地質構造)에 대한 정량적(定量的) 해석(解析)을 가(加)하였다. 잔류중력이상치(殘留重力異常値)(Residual gravity anomaly)를 계산(計算)하기 위하여 (1) "Grid-residual" 방법과 (2) "Profile smoothing" 방법을 적용하였던바 본지역(本地域)의 지질구조(地質構造)를 파악하기 위해서는 "Profile smoothing" 방법이 적합함이 증명되었다. 지질적(地質的) 증거(證據)와 잔류중력(殘留重力) 이상치(異常値)의 정량적(定量的) 해석(解析)으로부터 다음과 같은 결론(結論)을 얻을 수 있다. (1) Triassic 분지(盆地)의 최탐부(最探部)는 지질학적(地質學的)으로 추정(推定)된 것과는 달리 분지(盆地)의 중앙부(中央部)에 위치(位置)한다. (2) Triassic 분지(盆地)는 연속적(連續的) 계단식(階斷式) 단층(斷層)에 의(依)하여 형성(形成)되었다. (3) 퇴적암층(堆積岩層)에 협재(挾在)되어있는 현무암층(玄武岩層)과 현무암질암맥(玄武岩質岩脈)의 근원(根源)이라고 추정되는 고밀도(高密度)의 암체(岩體)가 Chesire 지역(地域)과 Gaillard 지역(地域) 지하(地下)에 부존(賦存)한다. (5) Triassic 분지(盆地)의 반저(盤底)는 지질적(地質的) 추산(推算)과는 달리 분지(盆地)의 중앙부(中央部)가 동부경계단층부(東部境界斷層部)(Eastern Border Fault)하부(下部)보다 약 7,000 feet 깊은것으로 판단(判斷)된다. (5) 퇴적암층(堆積岩層)의 동경(東頃)은 본분지(本盆地)에 퇴적(堆積)이 완료(完了)된 후 분지(盆地)의 서경부(西境部)(Western Border)에 융기의 축(軸)이 있었기 때문이다. (6) Triassic 분지(盆地)의 지각후(地殼厚)("Moho"까지이 깊이)는 약 14 mi1e이며 동부(東部)및서부고지대(西部高地帶)(Eastern and Western Highlands)는 각각 20 mile 및 19 mile이다.