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안종국,이창수 인제대학교 백병원 2002 仁濟醫學 Vol.23 No.2
Purpose: The purpose of this study is to provide the general guidence of treatment of recurrent patella dislocation and subluxation. Materials and Method: We studied retrospectively 24 patients who underwent the operation for the recurrent patella dislocation and subluxation from september 1997 to august 2002. The procedures were lateral retinacular release, medial reefing and proximal and distal realignment surgery. The clinical evaluation was graded by Crosby and Insall's criteria and radiological parameters were post operative congruence angle(CA) and patellofemoral joint degeneration. Result: In clinical evaluation, 9 patients showed excellent result, 16 patients good result and 3 patients fair to poor result. Among the 3 patients who showed fair to poor result, there was chronic synovitis in one patient. So we did arthroscopic irrigation and debridement. After that, Symptom improved, Congruence angle(CA) changed average 20.4 degrees to 12.3 degrees. Conclusion: Age and Q angle are factor in deciding the procedures of treatment of recurrent patella dislocation and subluxation. Also it is very helpful in deciding the further procedures to evaluate the patella tracking in operation filed artnroscopically.
안종국,김효준 三陟大學校 産業科學技術硏究所 2002 産業科學技術硏究論文集 Vol.7 No.1
This paper present the design of a robust controller for a computer-controlled active vibration isolation system in the battle ship. Firstly, isolation system model is constructed considering the isolation structure equipped with precision electric devices actuator dynamic of a nonlinear hydraulic system. An active control system is designed based on sliding mode control theory regarding parametric uncertainties of the isolation structure induced by laden condition and varying parameters of the hydraulic system resulting from leakage, pressure drop of pressurized line and temperature-effected viscosity. Finally, the performance of the active isolation system is evaluated by simulation under certain disturbance condition with are transmitted from base structure of the battle ship induced by an under water explosion or firing of machine gun.
장방형 용기내 자성유체의 Benard유동에 대한 전열 제어 특성에 관한 연구
안종국,서이수,박길문,Ahn, Jong-kug,Seo, Lee-Soo,Park, Gil-Moon 한국유체기계학회 2004 한국유체기계학회 논문집 Vol.20 No.2
This study deals with the Benard Flow of Magnetic Fluids in a rectangular cavity which the ratio between height and width is 1 : 4 and the base side or left side is a heating face while other sides are to be cooling faces. When Magnetic field was equally impressed, considering the internal rotation of the elementary ferromagnetic particle, we found the following result from the numerical analysis of the GSMAC algorithm applied to the equation of the magnetic fluid. Benard flow is controlled by intensity and direction of magnetic fields, and critical point appears when especially magnetic field with a heating base and side area near H=-7000 and H=-10000 is applied.
안종국,박명호 三陟大學校 2003 論文集 Vol.36 No.-
An experimental study about the effects of temperature and pressure on the burning velocity of gasoline-air, methane-air and methane/hydrogen-air mixtures has been conducted by a closed vessel technique. The experimental results show that the burning velocity of gasoline is slightly higher than that of methane, but their basic behavior of combustion characteristics, positive dependence on temperature and negative one on pressure, is the same, and 20 vol.% addition of hydrogen to methane enhances the burning velocity by about 30%, but does not come to reverse the tendency of pressure dependence to that of pure hydrogen.
장방형 용기내 자성유체의 Benard유동에 대한 전열 제어 특성에 관한 연구
안종국,서이수,박길문 한국유체기계학회 2004 한국유체기계학회 논문집 Vol.7 No.4
This study deals with the Benard Flow of Magnetic Fluids in a rectangular cavity which the ratio between height and width is 1 : 4 and the base side or left side is a heating face while other sides are to be cooling faces. When Magnetic field was equally impressed, considering the internal rotation of the elementary ferromagnetic particle, we found the following result from the numerical analysis of the GSMAC algorithm applied to the equation of the magnetic fluid. Benard flow is controlled by intensity and direction of magnetic fields, and critical point appears when especially magnetic field with a heating base and side area near H=-7000 and H=-10000 is applied
안종국,박명호,김민주 三陟大學校 産業科學技術硏究所 2002 産業科學技術硏究論文集 Vol.7 No.3
This study is an investigation for the ADS optimum design by using FEM. We write out program which express ADS perfectly and reduce the required time for correcting of model to the minimum in solution and manufacture result. We complete algorithm which can plan optimum forming of model by feedback error information in CAE. For that, we draw up ADS program which modeling rachet wheel by using visual LISP and telegraph to ANSYS, structural solution program, we can solve stress solution. Then we correct model by feedback date obtaining in solution process, repeat course following stress solution again and do modeling rachet wheel for optimum forming. That is our aim. As a result of experience, we can develope automatic design program using Visual LISP and exhibit ADS as modeling third dimension CAD for optimum design. Also, we develop optimum design algorithm using ADS and FEM. In rachet wheel, greatest equivalence stress originates in key groove corner and KS standard is proved the design for security.
인장대 강선 고정술을 이용한 제5 중족골 기저부 골절의 수술적 치료
안종국,정형진,배서영,박지용,Ahn, Jong-Kuk,Chung, Hyung-Jin,Bae, Su-Young,Park, Ji-Yong 대한족부족관절학회 2011 대한족부족관절학회지 Vol.15 No.1
Purpose: To evaluate the clinical and radiological results of internal fixation with tension band wiring for the fracture at the base of fifth metatarsal bone. Materials and Methods: From January 2008 to December 2009, 15 cases with displaced fracture at the base of fifth metatarsal were analyzed and average follow up period was 13.8 months. Lawrence classification was used to classify fracture type. We evaluated clinical results by American Orthopedic Foot Ankle Society (AOFAS) midfoot score and radiological results by union time. Complications was also checked. Results: According to classification, zone I fracture were 11 cases and zone II fracture were 4 cases. Bony union was achieved in all cases after 7 weeks. In the final follow-up, average AOFAS score was 94. There were no complications except hardware irritation. Conclusion: Satisfactory results were obtained after tension band wiring for the fifth Metatarsal base fracture in zone I fracture or comminuted zone II fracture for which it is not easy to be fixed with screw.