http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
화상계측에 의한 지중 전력케이블의 수트리 열화에 관한 연구
김덕근,임장섭,이진,Kim, Duck-Keun,Lim, Jang-Seub,Lee, Jin 한국전기전자재료학회 2000 전기전자재료학회논문지 Vol.13 No.12
Water treeing in underground distribution power cable is not easy to observe by nondestructive method and it has very complex patterns. This study describes the principles and practices of a continuous observation of initiation and growth of tree in polymeric insulation material using an image measurement technique. Using this technique we could observe water tree and the growing process of electrical tree due to the water tree and the growing process of electrical tree due to the water tree. All of these growing process is analyzed quantitatively by image measurement program composed of borland c++. We fabricated the thin film type specimen to observe water tree easier and also the needle electrode was prepared by etching method using electrolytes. Initiation and the growth of three was observed somewhat different depending on the applied voltage and the water electrode. AgNO$_3$solution electrode accelerates the initiation and the growth of water tree, compared to those of distilled water electrode. The water and the electrical tree occurred by water tree has discontinuous growth characteristic.
자가건 보강술을 이용한 급성 전방 십자 인대손상의 일차 복원술
정현기,최충혁,최경진,김덕근 ( Hyun Kee Chung,Choong Hyeok Choi,Kyeong Jin Choi,Duck Keun Kim ) 대한슬관절학회 1997 대한슬관절학회지 Vol.9 No.2
The purpose of this study is to evaluate the results of primary repair and autogenous tendon augrnentation for acute rupture of anterior cruciate ligament. We primarily repaired 13 cases of acute ACL injury with autogenous tendon augmentation between Jul. 1988 and Jan. 1996. Among 13 cases, there were 2 isolated ACL injuries and 11 cases were combined with MCL injuries. All 13 cases were followed up over 1 year. An average follow up period was 4.1 years(1.1 - 8). All patients had open primary rnultiple suture repair and semitendinosus tendon(11 cases) or iliotibial band(2 cases) aug- mentation at average 3.6 days after the injury. In 11 cases, medial collateral ligarnent injuries were noted and these ruptured ligaments were supplement- ed with staple or vicryl suture. We evaluated the results with Lysholm Knee Score, KT-1000 arthrometer, postoperative ROM of knee, thigh muscle atrophy, extension lag, Lachman and pivot shift test. The clinical results were as follows 1. Lysholm Knee Score was mean 87.2 points; over 90 points: 5 cases, 80-8$ points: 5 cases, 70-79 points: 3 cases 2. Using the KT-1000 arthrometer, the average side to side difference wm 1.8nun in 201b(89N) and the compliance index was average 1.7mm. 3. Postoperative ROM of knee was nearly normal and there was no extensioe lag in any cases. But, we per- formed arthroscopic adhesiolysis in one case for limited motion of knee joint a( postoperative 8 months. Thigh circumference was measured 0.95 cm difference than the healthy side at 10cm above upper pole of patella. 4. Lachman test was positive in 2 cases. 5. Pivot shift test was positive in 2 cases. Even if not many cases, we obtained relatively satisfactory results. So the pirimary repair with autogenous tendon auynentation was recornmandable procedure for acute rupture of ACL, especially combined with MCL injury.