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정석,조희찬,이훈 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.2
본 연구에서는 현재까지 분체를 생산하기 위한 분쇄공정에 있어 적용된 수치모델들을 소개하고 그 중 입자들이 움직일 때 발생하는 힘의 상호작용을 분석하여 분쇄매체의 거동을 예측할 수 있는 Discrete Element Method(DEM) 이라는 수치모델 중 hard-particle모델과 softparticle모델을 비교분석하여 분쇄공정에 도입함으로써 분쇄기내에서 발생하는 현상에 대해 규명하고 분체를 생산하는데 있어 효과적인 공정설계와 운전조건을 제시하고자 하였다.
Basic Knowledge about Metal Stent Development
정석 대한소화기내시경학회 2016 Clinical Endoscopy Vol.49 No.2
Biliary self-expandable metal stents (SEMS), a group of non-vascular stents, have been used in the palliative management of biliary obstruction around the world. However, there are still unmet needs in the clinical application of biliary SEMS. Comprehensive understanding of the SEMS is required to resolve the drawbacks and difficulties of metal stent development. The basic structure of SEMS, including the materials and knitting methods of metal wires, covering materials, and radiopaque markers, are discussed in this review. What we know about the physical and mechanical properties of the SEMS is very important. With an understanding of the basic knowledge of metal stents, hurdles such as stent occlusion, migration, and kinking can be overcome to develop more ideal SEMS.
통합데이터 플랫폼을 활용한 산업단지 미세먼지 저감 방안
정석진,정석,Chung, Seokjin,Jung, Seok 한국자원리싸이클링학회 2020 資源 리싸이클링 Vol.29 No.1
Manufacturing processes in industrial complexes produce NOx, SOx, VOCs, which cause particulate matter (PM). Therefore, this study analyzed the characteristics of each industrial complex by using scattered public data, matched the existing particulate matter(PM) reduction technology, and proposed an optimized reduction plan. The application of matching technologies and facilities by industrial complexes based on data is able to mitigate NOx, SOx, and VOCs which cause particulate matter in the process in advance. This way can be an effective alternative in order to reduce PM in the manufacturing processes as well as industrial complexes.
정석,김정자,Jung, Seok,Kim, Jeong-Ja 대한물리치료과학회 1999 대한물리치료과학회지 Vol.6 No.1
The hand is a very specialized organ that functions to obtain information and to execute motor acts essential to human interaction with the environment. Loss of hand function through infections affects the mechanical tasks that the hand performs and psychological adjustments to their disability. Infection is a disastrous complication of hand injuries and adequacy of circulation is of greatest importance to prevention of infection. Careful debridement, incision, and adequate drainage and antibacterial treatment are of great importance. Optimal care of the infected hand demands that carefully surgical care, early postoperative exercises and other therapy. Hand rehabilitation has grown as a specialty area of both physical and occupational therapy. It is essential that the surgeon and therapist work together, and communicate freely-all of which generally require daily contact. Treating the psychological loss suffered by the patient with a hand infections is an integral part of the rehabilitation therapy as well. Treatment techniques, Whether thermal modalities or specifically designed exercises, are used as a bridge to reach a further goal of returning to functional performance.