http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
서로 다른 도파구조와 결합된 광 GADC에서의 최적 전력전송
李庸日,陳明哲 慶北專門大學 2003 慶北專門大學 論文集 Vol.22 No.-
To evaluate optimal design conditions on optical power coupling in grating-assisted directional couplers(GADCs) with two guiding channels, a newly developed rigorous modal transmission-line theory(MTLT) is applied. By defining a power distribution ratio(PDR) and coupling efficiency(CE) amenable to the rigorous analytical solutions of MTLT, we explicitly analyze those characteristics of TE modes propagating in GADCs. The numerical results reveal that the incident power is optimally coupled into the desired guiding channel if the powers of rigorous modes excited at the input boundary of grating-assisted coupler are equally partitioned.
김명호,유문집,이성철,박진영,유석주,박희곤 단국대학교 1996 論文集 Vol.30 No.-
The purpose of operative treatment in thoracolumbar spine fractures is anatomical reduction and stabilization of the fractures and thus promote neurological recovery and early rehabilitation. To achieve these goals, complete preoperative assessment and recognition of the fracture pattern is necessary in addition to good surgical technique. The authors analyzed 27 cases of thoracolumbar spine fractures operated from Jun. 1994 to Dec.1995 at the Department of orthopaedic surgery, Dan-kook University Hospital. All cases were analysed according to McAfee classification. In deciding the appropriate surgical approach, fracture pat-tern, stability and neurologic status were considered. The result were as follows; 1. Unstable burst fracture, 11 cases, was the most frequent type. 2. 1st lumbar fracture was the most common level in this series. 3. Fall down, 15 cases out of 27, was the most common cause on thoracolumbar spine fracture. 4. Anterior approach was performed in 8 cases and posterior approach was performed in 19cases. 5. Good results were obtained through firm fixation and early rehabilitabion.
고관철 전치환술의 임상적 고찰 : 초기 137례의 임상 분석 an Analysis of First 137 Total Hip Arthroplasty in 129 Partients
김명호,이성철,박희곤 단국대학교 1998 論文集 Vol.32 No.-
Primary indication for total hip arthoplasty is pain in the hip joint. The number of total hip arthroplasty has been continuously increasing and the technique and knowledge has developed quite a lot. The authors reviewed and analyzed 137 cases of primary total hip arthroplasty in 129 patients. which were performed at the Department of Orthopaedic Surgery of Dankook University Hospital from June 1994 through August 1997. The patient were 107 males and 22 females, and mean age was 54.5 years. The etiologies for diseases were 103 avascular necrosis of the femoral head. 8 primary and 12 secondary osteoarthritis, and 14 others. Functional evaluation was made with a Harris hip scoring system. The results showed an improvement in hip function from preoperative 54 points in average to postoperative 1 year 94 points in average, and satisfactory results were obtained in 88%.
김명호,이성철,박진영,김정완 단국대학교 1997 論文集 Vol.31 No.-
Surgical treatment of spinal stenosis is a common procedure especially for the elderly people. Spinal stenosis may be local, segmental or generalized and may be caused by the encroachment of bone or soft tissue. The objectives of the present study were to evaluate clinically and radiologically two groups of spinal stenosis who were surgically treated with pedicular screw fixation system and posterior lumbar interbody or posterolateral bone graft following complete posterior decompression. One group was multilevel type and other group was one or two level type spinal stenosis. We have compared the results of autogenous bone fusion and mixed bone fusion(autogenous and heterogenous). From July 1994 to October 1996, 101 cases of lumbar spinal stenosis were surgically treated and were followed up for more than three months. The indication for operative treatment was pain, continuous or intermittent, which caused significant functional disability, and which had not been relieved by conservative treatment. The results of the study were as follows 1. There were 79 cases of degenerative type, 14 cases of spondylolis-thetic type, 3 cases of iatrogenic type, 3 cases of any possible combination type and 2 cases of congenital type lumbar stenosis. 2. The involved levels were as follow : 1 level 18(17.8%), 2 level 47(46.5%), 3 level 26(25.7%) and 4 level 10(9.9%). And among involved levels, the most frequent level was L4-L5 intervertebral space(97%). 3. According to Kirkaldy-Willis criteria, the postoperative results were excellent in 26 patients(25.7%), good in 58(57.4%), fair in 17(16.8%), and showed satisfatory results in 18 cases(100%) of 1 level, 46 cases(97.9%) of 2 level, 13 cases(50%) of 3 level, 7 cases(70%) of 4 level 4. There were 32 cases of sutogenous bone fusion and 69 cases of mixed bone fusion(sutogenous and heterogenous) 5. The non-union rate was 10.9%(11 cases) and 13%(9 cases) in mixed bone fusion(autogenous and heterogenous) and 6.2%(2 cases) in autogenous bone fusion. 6. Postoperatively, the complications were as follows : 11 cases(10.9%) non-union, 6 cases(5.9%) implant failure, 2 cases(1.98%) wound infection, 2 cases(1.98%) cauda equina syndrome.
柳碩柱,李聖喆,朴泰永,柳文集,金明昊,鄭宣根 단국대학교 1995 論文集 Vol.29 No.-
We studied 25 cases of patients with anterior knee joint pain without any other knee problems with a isokinetic evaluation technique using Cybex. The results are 1. The peak torques for the knee extensor muscles were decreased statistically 2. The peak torques for the knee flexor muscles were decreased relatively also but not statistically 3. TAE(Torque Acceleration Energy) values for knee extensor & flexors were all decreased from disuse atrophy 4. The torque curve for extensors showed decreased power around 30 degrees of knee flexion
정상체중성인과 과체중성인의 거골-제1종족골 및 종골하면-제1종족골하면 관절간 각도 차이에 대한 연구
유문집,김명호,유석주,이성철,박진영 단국대학교 1997 論文集 Vol.31 No.-
Normal feet have the longitudinal arch for the distribution of the weight. The longitudinal arch is known lateral and medial longitudinal arch. Collapsed arch of the foot is flat foot and it is the cause of the foot pain. Of course the low arch does not always make a foot problem in sports and daily activity. Longitudial foot arch is visible in the standing foot lateral radiograph, Harris mat and visual observation. In Radiographic study the lateral Talo-lst Metatarsal angle is known in standing foot lateral film. But the longitadinal medial arch is not correctly obtained in Talo-lst Metatarsal angle. So this study for Calcaneo-lst metatarsal angle in standing lateral foot radiograph is more valuable angle in medial longitadinl arch. And we do the study on difference in the longitadinal arch in normal weight versus overweight person.