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유기 EL 성막 공정을 위한 점 증발원의 DSMC 시뮬레이션
전성훈,이응기,Jun, Sung-Hoon,Lee, Eung-Ki 한국반도체디스플레이기술학회 2010 반도체디스플레이기술학회지 Vol.9 No.3
The performance of an OLED fabrication system strongly depends on the design of the evaporation cell-source. Therefore, necessity of the preceding study for cell source development of new concept is becoming increase. A development plan to substitute for experiment is applied as use simulation. In this study interpret behavior of a particle through DSMC techniques, and in this paper presenting a form to make so as to have better performance of the pointtype cell source which had a nozzle.
전성훈(Sung Hoon Jun),김민석(Minseok Kim),김숙한(Sookhan Kim),이응기(Eung Ki Lee) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
Doctor blade which is required for precision and durability as main specifications is a core part for product life cycle and quality at a toner cartridge for a laser printer. A study about automation system is needed because of difficulty of mass-producing doctor blades at present. This paper was researched about technique automating production line of doctor blade. Automated manufacturing process for doctor blade consists of six steps that are supply of raw material, punching and cutting, pressing, supply of brackets, laser welding and moving finished product. And each step also was studied in this paper.
광범위 당뇨병성 족부 궤양 및 괴사에 대한 복직근 유리 피판술의 임상적 유용성
정현균,전성훈,최동혁,김희동,송준영,Jung, Heun-Guyn,Jeon, Sung-Hoon,Choi, Dong-Hyuk,Kim, Hee-Dong,Song, Jun-Young 대한미세수술학회 2010 Archives of reconstructive microsurgery Vol.19 No.1
The purpose of this study was to present the clinical significance of rectus abdominis free muscle flap for large sized diabetic ulcer and necrosis of the foot to salvage limb. From June 2000 to February 2006, eleven patients were included in our study. There were seven males and four females with a mean age of 58.3 years (48~65) at the surgery. All had a history of diabetics and subsequent huge soft tissue defect caused by necrotizing abscess formation around the foot and the ankle. After complete debridement of large sized, infected necrotic tissue, susceptible intravenous antibiotics and wound care were done. After control of infection, confirmed by clinical and laboratory findings, the rectus abdominis free muscle flap was applied to cover remained large soft tissue defect and to prevent the recurrence of infection. All flaps survived and it provided satisfactory coverage for the soft tissue defect on the foot and the ankle area for a mean of 41.1 months (24~85) follow up period. All except of one patients did not have any recurrence of infection on the operation site and could salvage their limbs. The rectus abdominis free muscle flap could be recommended for large sized soft tissue defect after necrotizing abscess in diabetic foot to salvage major limb.
두 개 절개를 이용한 양극성 고관절 반치환술 -15예의 분석-
김병학 ( Byung Hak Kim ),정영율 ( Young Yool Chung ),전성훈 ( Sung Hoon Jun ),최동혁 ( Dong Hyeok Choi ) 대한고관절학회 2010 Hip and Pelvis Vol.22 No.3
목적: 근력 약화로 재활치료에 어려움이 예상되거나 탈구의 고위험군 환자에 한하여 Berger가 사용하였던 두 개 절개 수술 방법을 이용하여 인공 고관절 반치환술을 시행하고 이 수술 방법의 유용성에 대해 조사하였다. 대상 및 방법: 2005년12월부터 2007년 7월까지 새로운 수술 방법을 이용한 15명을 대상으로 하였다. 평균 연령은 75.2세 이었다. 15명 중 4명은 뇌경색 후유증인 편측 마비로 보행에 제한이 있었으며, 5명은 신경정신과적인 문제로 치료 중이었다. 수술 시간, 출혈량, 절개 길이, 수술 후 보행시작, 입원 기간, 일상 생활 회복 정도, 합병증에 대해 조사하였다. 결과: 수술 시간은 평균 93분이었다. 절개 길이는 전방 평균 6.4 cm, 후방 평균 7.2 cm이었다. 수술 중 출혈양은 평균 420 cc이었으며, 수술 후 출혈량은 평균 230 cc이었다. 보행 시작은 수술 후 평균 3.3일 (1~5일) 이었다. 입원 기간은 평균 24.3일 이었다. 15명 중 14명에서 수상 전 보행 상태를 회복하였다. 2예에서 수술 중 대퇴골 골절이 발생하여 강선을 이용하여 고정하였으며, 1예에서 전방 절개의 피부 부분 괴사가 발생하였다. 최종 추시에서 탈구나 재치환술은 없었다. 결론: 새로운 수술법은 근력의 약화가 있는 환자나 고령 환자에서 재활치료에 장점이 있었으나 긴 수술 시간과 높은 합병증은 문제점이었다. Introduction: We wanted to evaluate the efficacy of bipolar hemiarthroplasty using Berger`s two-incision surgical technique for patients with muscular weakness around the hip joint and/or a high risk of dislocation. Materials and Methods: We performed bipolar hemiarthroplasty for 15 femoral neck fractures using Berger`s two-incision technique between December 2005 and July 2007. The mean age of the patients was 75.2 years old. Four of them had difficulty in walking due to the sequalae after stroke and five have been treated for psychoneurologic disorders. We investigated the operation time, the length of the anterior and posterior incisions, the amount of bleeding, the time untill walking after the operation, the total hospital stay, the recovery to activities of daily living and the complications such as dislocation. Results: The mean operating time was 93 minutes. The average anterior and posterior skin incision length was 6.4 cm and 7.2 cm, respectively. The mean amount of bleeding was 420 cc at the time of surgery and 230 cc postoperatively through a drain. The patients started walking at a mean of 3.3 (1 to 5) days after the operation and the mean hospitalization was 24.3 days. Fourteen patients went back to their pre-injured activities of daily living, except one case with an intraoperative periprosthetic fracture. As for complications, two cases (13.3%) of femoral fracture were intraoperatively observed and one case of skin necrosis on the anterior incision site occurred. There were not any cases of dislocation or infection. Conclusion: Two-incision bipolar hemiarthroplasty had advantages for rehabilitation in elderly patients who have a high risk of dislocation, as well as in the patients with muscle weakness. But the operation took a long time and it had a high complication rate.