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장성욱,이진걸,Chang, Sung-Ouk,Lee, Jin-Kul 대한기계학회 2002 大韓機械學會論文集A Vol.26 No.6
This paper discusses the composition of the theory of reinforcement teaming, which is applied in real-time teaming, and evolutionary strategy, which proves its the superiority in the finding of the optimal solution at the off-line teaming method. The individuals are reduced in order to team the evolutionary strategy in real-time, and new method that guarantee the convergence of evolutionary mutations are proposed. It is possible to control the control object varied as time changes. As the state value of the control object is generated, applied evolutionary strategy each sampling time because of the teaming process of an estimation, selection, mutation in real-time. These algorithms can be applied, the people who do not have knowledge about the technical tuning of dynamic systems could design the controller or problems in which the characteristics of the system dynamics are slightly varied as time changes. In the future, studies are needed on the proof of the theory through experiments and the characteristic considerations of the robustness against the outside disturbances.
가상머신 드라이브를 이용한 윈도우즈 환경에서의 실시간 제어기법
장성욱,이진걸,Chang, Sung-ouk,Lee, Jin-Kul 제어로봇시스템학회 2002 제어·로봇·시스템학회 논문지 Vol.8 No.1
We studied the technique which can control the real system without additional hardware drivers using virtual machine driver operated on the windows operating system. We showed the feasibility of the proposed scheme under the error and the delay of a sampling time on the multi task processing through the load test of the experiment using graphic user interface.
장성욱 ( Sung Wook Chang ),한선 ( Sun Han ),류경민 ( Kyoung Min Ryu ),류재욱 ( Jae Wook Ryu ) 대한외상학회 2015 大韓外傷學會誌 Vol.28 No.1
Purpose: Vascular injuries caused by traffic, industrial accidents and by outside activities have increased in Korea. Especially, vascular injuries to the extremities can lead to limb loss and even mortality if they are not appropriately treated. The aim of the study was to evaluate the surgical outcomes of femoropopliteal vascular management after trauma. Methods: The medical records of 12 patients with femoropopliteal vascular injuries who were treated at Dankook University Hospital from 2011 to 2013 were reviewed. Iatrogenic vascular injuries were excluded. The clinical data including the causes of injury, associated injuries and surgical outcomes were analyzed retrospectively. Results: All patients were male, with a mean age of 46.8±16.3 years (range: 26~69 years). The causes of vascular injuries were four traffic accidents, three industrial accidents, two iron plates, one outside activity, one glass injury and one knife injury. The average transit time between the place of the accident place and the emergency department was 3.0±2.1 (0.5~12.5) hours, and the average preparation time for surgery was 8.0±6.7 (1.7~23.3) hours. The anatomic injuries included the popliteal vessel in seven cases and the femoral vessel in five cases. The average Injury Severity Score (ISS) was 12.0±5.0 (5~17), and the average Mangled Extremity Severity Score (MESS) was 5.7±2.1 (2~9). The operation methods were four interposition grafts, three end-to-end anastomoses, two direct repairs and three patch angioplasties. One case required amputation of the injured extremity. Conclusion: Early recognition and revascularization of the injured vessel are mandatory to reduce limb loss and to obtain satisfactory outcomes. Therefore, careful/rapid evaluation of the vascular injuries and timely/successful surgical treatment are the keys to salvaging an injured limb. [ J Trauma Inj 2015; 28: 15-20 ]