원자력 부품 가공용 Multi Turn Table 구조강도 해석

조재상(Jae Sang Jo),김정환(Jung Hwan Kim),박재현(Jae Hyun Park),황동환(Dong Hwan Hwang),배재일(Jae Il Bae) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.5-2

활로 4 징증에서 술전 폐동맥 크기에 대한 연구

조재일,김종환,Jo, Jae-Il,Kim, Jong-Hwan 대한흉부심장혈관외과학회 1983 Journal of Chest Surgery (J Chest Surg) Vol.16 No.1

Tetralogy of Fallot is characterized by the interventricular septal defect associated with obstruction of the right ventricular outflow. The importance of the latter anatomic malformation was clinically evaluated according to the angiographic measurements of the pulmonary arteries along with the pulmonary valve annulus. Seventy of a total 76 patients operated on during a whole year of 1981 were the patients for clinical evaluation. Fifteen patients died within 1 month after operation with the operative mortality of 21.4%. The young age and the severity of pulmonary arterial hypoplasia were ones among the surgical risk factors at a total corrective surgery of tetralogy. Preoperative angiographic measurements of the pulmonary arteries to speculate the expected postoperative ratio between the left ventricular and the right ventricular pressures were retrospectively calculated according to the formula. The predicted values of P RV/LV greater than 0.5 carried apparenliy higher complication and mortality rates than the group of P RV/LV less then 0.5. The selection of the candidates for either a total correction or the staged operation In tetralogy of Fallot can be evaluated on the preoperative angiographic measurements and the expected Improvements of the clinical results were discussed.

심내막상 결손증에 대한 임상고

조재일,서경필,Jo, Jae-Il,Seo, Gyeong-Pil 대한흉부심장혈관외과학회 1984 Journal of Chest Surgery (J Chest Surg) Vol.17 No.4

Thirty-seven patients had undergone repair of a endocardial cushion defect between 1977 and Aug. 1983 in Seoul National University Hospital. Twenty eight had a partial defect, one intermediate defect and eight complete endocardial cushion defect. Tricuspid cleft was found in 4 cases and mitral cleft was in all p-ECD. Seven patients were of type C anatomy in c-ECD. Four patients had associated major anomalies, including three TOF in c-ECD, one coarctation in p- ECD. In p-ECD patients, the septal defect was closed with patch in all cases and the atrioventricular valvular insufficiency was corrected with MVR in 4 cases, TVR in 1 case and simple interrupted sutures in remainders. In c-ECD patients the septal defect was closed with single patch except one case. The atrioventricular valve was repaired with simple interrupted sutures except one MVR and TVR case. The operative mortality was 14.2% in p-ECD, 44.4% in c-ECD, but recent 3 years [1980-1983] mortality was 8.7% in p-ECD, 20% in c-ECD. More than grade III systolic regurgitant murmur was oted postoperatively in 4 cases of c-ECD and 3 cases of p-ECD. The operative risk factors were preoperative NYHA classification, cyanosis, Rp/Rs, systolic pressure of main pulmonary artery and the degree of regurgitation of atrioventricular valves. The causes of death were low cardiac output syndromes, pulmonary complications and arrhythmias.

심근보호에 대한 임상적 고찰

조재일,이영균,Jo, Jae-Il,Lee, Yeong-Gyun 대한흉부심장혈관외과학회 1984 Journal of Chest Surgery (J Chest Surg) Vol.17 No.4

Of the valve replacement patients operated between 1983 and June, 1984, 75 patients need more than 60 minutes of aortic cross-clamping time. 42 patients performed single valve replacement [35 MVR, 7 AVR with or without TAP] and remainder needs double valve replacement with or without TAP. The average aortic clamping time was 95.1 minutes. They need 30 minutes more extra-corporeal circulation time than aortic clamping time. The patients were divided into two groups by usage of cardioplegic solution. Group I [n=31] with Bretschneider solution and group II with potassium cardioplegic solution [M.G.H. modification] were analyzed by extra-corporeal circulation data,/CG and Echocardiography findings, and clinical data. There was no difference between two groups in Bivon addition amounts [cc/kg] and E.F. and S.F. by echocardiography, group I need 1 more electrocardioversion to convert sinus rhythm postoperatively. Also no difference could be found in patients whose preoperative C.I. was above 2.0 between two group. But significant postoperative decrease in E.F. was found in group I whose preoperative C.I. was below 2.0. Relatively longer ECC time was also needed in same group. Ischemic changes in ECG and low cardiac output syndrome was, however more prevalent in groupII. As a whole, the clinical data was satisfactory with both cardioplegic solution in clinical practice.

전이성 폐암의 외과적 치료

주홍돈,조재일,심영목,Ju, Hong-Don,Jo, Jae-Il,Sim, Yeong-Mok 대한흉부심장혈관외과학회 1992 Journal of Chest Surgery (J Chest Surg) Vol.25 No.10

There are follow-up data according to thirteen patients recieved the surgical resection for metastatic lung cancer arising from different primary tumor. The patients were received the surgical resection at Korean Cancer Center Hospital from July 1987 to Setember 1991 and followed-up to August 1992. There were 9 men and 4 women, ranging in age from 16 to 70 years[mean age, 42.8 years]. The primary tumors were 2 synovial sarcoma, 2 sarcoma, 2 osteosarcoma, 3 laryngeal ca, 1 melanoma, 1 ovarian ca and 1 bladder ca. The operative procedures were 5 wedge resections, 1 segmental resection, 5 lobectomies, 1 bil-obectomy and 1 pneumonectomy. There was no operative and hospital death. There were 3 deaths[each survival period: 2, 9 and 20 months, average 10.3 months]and 5 tumor recurrence during follow-up. At now, the average survival period of aliving patients is 29.1 months.

광커넥터의 반사를 이용한 다중화된 굽힘 손실형 단일모드 광섬유 변위센서

유정애,조재흥,권일범,Yoo Jung-Ae,Jo Jae Heung,Kwon Il-Bum 한국광학회 2004 한국광학회지 Vol.15 No.5

교량과 각종 건물을 비롯한 대형 토목 구조물에서 발생하는 수 mm의 변위를 한 개의 광섬유로 간편하게 측정하기 위하여 광커넥터에서 반사가 굽힘 손실에 의하여 변하는 현상을 이용한 새로운 다중화된 광섬유 변위센서를 제안하고 실험하였다. 한 쌍의 광커넥터 양끝에서 반사광의 신호차이가 두 광커넥터 사이에서 발생한 굽힘 변위에 의해서 달라지는 것을 Optical Time Domain Reflectometer로 측정하여 선형으로 그 변화가 측정되는 변위센서를 만들고, 이 센서 4개를 직렬형으로 배열하여 여러 지점의 변위를 동사에 측정이 가능한 다중화 센서 시스템을 구성하고 실험하였다. 그 결과 이 변위센서를 이용하면 4개 지점에서 각각 최대 6 mm까지의 변위를 6%의 오차범위 내에서 0.9942의 선형성을 가지고 변위를 측정할 수 있음을 확인하였다. We propose and present a new multiplexed bend loss type single-mode fiber-optic sensor system for displacement measurement in order to measure the displacement of several mm of civil engineering structures such as bridges and buildings. We make a bend loss type fiber-optic sensor for measuring displacements using the signal difference between two reflection signals due to various bend losses generating at a pair of optical connectors by using the optical time domain reflectometer. And we fabricate a multiplexed bend loss type fiber-optic sensor detecting linear displacements of 4 measuring positions of an object by setting these new 4 fiber-optic sensors on a single mode fiber simultaneously. We find that the multiplexed fiber-optics displacement sensor has linearity of 0.9942, maximum displacement of 6 mm, and accuracy of 6% for 4 measuring points.

발사대 제어용 통신 드라이버 개발 및 현장 시험

정일형(Il-Hyung Jung),조재복(Jae-Bok Jo),안재철(Jae-Chel An),문경록(Kyung-Rok Moon),홍일희(Il-Hee Hong) 한국추진공학회 2022 한국추진공학회 학술대회논문집 Vol.2022 No.11

광섬유와 필름격자를 이용한 가속도 센서

이윤재,조재흥,권일범,서대철,이남권,Lee, Youn-Jea,Jo, Jae-Heung,Kwon, Il-Bum,Seo, Dae-Cheol,Lee, Nam-Kwon 한국광학회 2008 한국광학회지 Vol.19 No.3

상용의 전자기 가속도 센서에 비해 신호의 안정성 면에서 우수하고 가격이 저렴하며 제작이 비교적 용이한 필름 격자를 이용한 광세기 방식의 새로운 가속도 센서를 제안하고 이를 제작하였다. 외부의 진동에 반응하는 외팔보(cantilever beam)에 서로 주기가 어긋난 2장의 진폭 변조용 필름 격자가 나란히 부착되어 이 필름격자를 지나가는 출력광이 외부진동에 따라 서로 다른 위상으로 변조된다. 이 두 필름격자에 의한 출력의 위상각을 이용하여 출력광 신호의 위상을 구하고, 위상 연속화 과정을 거쳐 외팔보의 변위를 계산하여 가속도 환산 관계식을 통해 가속도를 측정하였다. 본 논문의 필름 격자를 이용한 광섬유 가속도 센서는 대형 구조물 및 토목 구조물의 모니터링에 알맞은 7 Hz 이하의 저주파 대역에서 사용 가능하도록 설계하였다. 이 광섬유 가속도 센서는 광섬유를 이용하였으므로 전자기적 노이즈가 예상되는 곳에서도 구조물의 진동 측정에 적합하다. We develop a fiber optic acceleration sensor with LED, PD, POF, and a cantilever beam, having film grating at the edge of the beam. Light is transmitted from LED to PD through the film grating. When the cantilever beam moves by external vibration, output light is modulated as sinusoidal signals. The characteristics of output signals are dominated by the spacing of the film grating and also by the size and the elasticity of the beam. Two output signals, having constant initial phase difference, are obtained by two gratings with 90 degree phase difference. Those two signals are used to determine phase angle, which is proportional to the displacement of the beam. Finally, the acceleration is determined from conversion equation between displacement and acceleration. This sensor is designed for monitoring the vibration of large and complex building in the low frequency range of below 7 Hz, and is particularly suitable to measure acceleration in electromagnetic environments.

폐에 발생한 원발성 혈관 외피 세포종 - 1례 보고 -

김성호,조재일,심영목,Kim, Seong-Ho,Jo, Jae-Il,Sim, Yeong-Mok 대한흉부심장혈관외과학회 1990 Journal of Chest Surgery (J Chest Surg) Vol.23 No.2

Hemangiopericytoma is a rare neoplasm of vascular origin and arises in almost any part of the body. We experienced a 26 year-old man of primary pulmonary hemangiopericytoma with 4 months history of hemoptysis. Pulmonary hemangiopericytoma has no characteristic clinical or radiological features to distinguish it from other tumor of the lung, and because of that reason, wide surgical excision appears to be the treatment of choice. The hemangiopericytoma is usually encapsulated, and is composed of capillary pericytes histologically. The prognosis of the tumor is poor. Our case was dead 1 year after surgery because of the recurrence.

Celestin Tube 를 이용한 진행된 식도암환자에서의 고식적 수술치료 - 6례보고-

한재진,조재일,심영목,Han, Jae-Jin,Jo, Jae-Il,Sim, Yeong-Mok 대한흉부심장혈관외과학회 1989 Journal of Chest Surgery (J Chest Surg) Vol.22 No.2

Dysphagia is common symptom in patients with advanced esophageal cancer, which is not to be resected surgically. Especially when esophagorespiratory fistula is complicated, it leads to rapid deterioration and death due to pulmonary infection. Esophageal intubation relieves dysphagia as simple surgical execution and offers rapid effectiveness. For six patients with inoperable esophageal cancer including three esophago-respiratory fistulas, the palliative esophageal intubation was performed in Korea Cancer Center Hospital, in 1988. Traction technique via high gastrotomy with Celestin tube was used. Adequate palliation of dysphagia was achieved in 5 patients, but wound infection was developed in 2 patients, tube migration in 2 patients, and 2 died in hospital due to sepsis on the 16th and 42nd postoperative day, respectively. In 3 patients with esophagorespiratory fistula complicated after radiation therapy, the intubation was performed urgently and the result was satisfactory in 2 of them that the fistula was occluded successfully and aspiration or pulmonary infection was prevented.