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족부 족관절에 흔히 발생하는 스포츠 손상: 외측 족관절 불안정성
양기원,이경태,김진수,Young, Ki-Won,Lee, Kyung-Tai,Kim, Jin-Su 대한정형외과스포츠의학회 2007 대한정형외과스포츠의학회지 Vol.6 No.1
족부 족관절 영역의 스포츠 손상에서 가장 많은 것은 외측 족관절 불안정성이다. 이미 이에 대하여 많은 연구 및 발표가 있어 왔다. 이 가운데 아직 결론에 도달하지는 않고, 진행중인 논제에 대하여 간략하게 살펴보고자 한다. 외측 족관절 불안전성 환자를 치료함에 있어서 좀 더 좋은 결과를 얻는데 도움이 될 것으로 생각한다.
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버퍼 관리 기법을 이용한 개선된 ERICA 스위치 알고리즘
양기원,오창석 한국콘텐츠학회 2002 한국콘텐츠학회논문지 Vol.2 No.2
In this paper, we propose a enhanced ERICA switch algorithm using the buffer management scheme which can reduce the queue length, support the efficiency link utilization and the fair share. It has three different buffer thresholds which are low threshold, congestion notification threshold and high threshold. According to the each buffer threshold status, switch announced congestion notification to the source differently. So, sources could know the congestion more quickly and fast remover from network congestion. As a experimental results, it is proved that proposed algorithm is the more efficient than ERICA. Especially, proposed switch algorithm provides congestion control mechanism to make the best use of with keeping fairness and reduce queue length.
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양기원,도중회 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.55 No.1
Al-doped and undoped ZnO films were deposited on (000l) Al2O3 substrates at various oxygen partial pressures by using pulsed laser deposition. With changing oxygen partial pressure, the c lattice parameter, the FWHM in the rocking curve, and the absorption edge in the optical transmission spectra of the Al-doped ZnO films displayed distinctive differences above and below 10 mTorr. The transport property of the Al-doped ZnO films gradually changed from a semiconductor-like one above 10 mTorr to a metal-like one below 1 mTorr while the undoped ZnO showed only a semiconductor-like property even at 0.1 mTorr. These results suggest that donor defects created by a low oxygen pressure play an important role in lowering the resistivity of the Al-doped ZnO film, but they do not provide ZnO with a sufficient condition to exhibit metal-like properties. We conjecture that the metal-like conductivity of Al-doped ZnO films is due to a combined effect of Al doping and low oxygen pressure.
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Freer Test for an Intraoperative Evaluation of a Lisfranc Joint Injury: A Technical Report
양기원,이홍섭,박성철,정구민,Young, Ki Won,Lee, Hong Seop,Park, Seongcheol,Jeong, Gu Min Korean FootAnkle Society 2020 대한족부족관절학회지 Vol.24 No.4
Failure to achieve stable fixation during surgery for a Lisfranc joint injury leads to subtle instability that causes dysfunction and posttraumatic osteoarthritis. Therefore, it is important to check for appropriate fixation during surgery. This paper reports a test that evaluates the joint instability dynamically during the open reduction of the Lisfranc joint and checks the stability after fixation. a Freer elevator was inserted into the interosseous area between the medial cuneiform and second metatarsal base, and a twisting force was applied to evaluate the dynamic instability of the Lisfranc joint. After fixation of the Lisfranc joint, the stability of the fixation could be tested by trying this maneuver with the Freer elevator. Overall, the Freer test can be considered a valuable test in open surgery for a Lisfranc joint injury.
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족관절 수술 후 발생한 통증에 대한 체외충격파의 치료 효과
양기원,김진수,전성한,이도현,Young, Ki Won,Kim, Jin Su,Jeon, Sung Han,Lee, Do Hyun 대한정형외과초음파학회 2015 대한정형외과 초음파학회지 Vol.8 No.1
Purpose: To evaluate the effectiveness of extracorporeal shock wave therapy (ESWT) for postoperative pain after surgery around ankle. Materials and Methods: We included 21 patients who performed an operation around ankle from 2009 to 2013. 4 times ESWT were applied to the patients who have tenderness more than visual analog scale (VAS) point 4. We evaluated the VAS at each sessions and final follow-up, and American Orthopedic Foot and Ankle Society ankle-hindfoot score (AFOAS) was checked at preoperative and final follow-up. Patient's satisfaction and complications were surveyed. Results: Preoperative VAS was mean 4.7, postoperative pain VAS was mean 6.0 at 4.5 months follow-up. The VAS after ESWT each session at 1, 2, 3 weeks and final follow-up were 4.8, 3.2, 2.3, 2.9, respectively. Mean final follow-up period was 9.4 months. Final VAS were significantly decreased (p<0.001). Final VAS were increased from VAS at last session of ESWT, however, not significant (p=0.189). AOFAS significantly improved from preoperative 60 to final follow-up 86 (p<0.001). Excellent was 12 patients (57%), good was 4 patients (19%), no change was 3 patients (14%) and poor was 2 patients (9%). 1 patient complained a dizziness and nausea during ESWT. Conclusion: ESWT for postoperative pain after ankle surgery shows satisfactory pain reduction in 76% of all patients without severe complication.
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