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이도성 韓國計量經濟學會 1995 계량경제학보 Vol.6 No.-
신호게임에서 송수신자간의 추론에 의해 암묵적으로 전달 가능한 전략에 관한 정보의 개념을 정의한다. 암묵적인 전달 가능성이 있는 정보는 각 경기자가 정보 전달에 참여할 誘因과 이러한 정보가 전달될 것으로 생각하고 행동하는 것에 대한 安全性의 고려를 필요로 한다. 이러한 개념들은 신호게임에서 경기자간의 조정과 협상이 일어나는 상황을 묘사하고 있으며 이 조건들을 만족시키는 전달 가능 최대 정보와 부합되는 전략으로 이루어진 균형을 離脫不能均衡으로 정의한다. 이탈불능균형의 존재를 보이고 기존의 개념들 중에서 연관된 개념들과의 비교를 통해서 이 개념의 특징을 밝힌다.
이도성 서강대학교 경제학연구원 2002 시장경제연구 Vol.31 No.2
Major research areas of modern control theory are surveyed to recognize the current boundary of the theory. The literature on the tate constraints and degeneracy phenomenon of maximum principle are surveyed and their major results are reported. An example whose dynamic constraint is outside the domain of Lipschitz continuity is analyized showing new kinds of pathology. In the absence of Lipschitz condition degeneracy phenomenon occurrs without state constraints and 'blow up to infinity in finite time' type jump occurrs in adjoint variables.
이도성 서강대학교 경제연구소 2003 시장경제연구 Vol.32 No.1
Evolving relationships between the main results of dynamic programming and optimal control are surveyed Their common predecessor is the classical calculus of variations and their major results, ie, HJB equation and the maximum principle are essentially two different ways of expressing the Euler-Lagrange condition of the calculus of variations This fact is accounted by the method of charateristics that converts the PDE of HJB equation into the system of ODEs of the maximum principe. The relationship between these two methods of dynamic optimization weakens as nonsmoothness in value function is permitted and the equalities that prevailed with smoothness becomes those of inclusions
이도성 대한척추신경외과학회 2013 Neurospine Vol.10 No.2
Type III odontoid fractures have been treated by several methods. In case of anteriorly displaced type III odontoid fracture which is not corrected by closed reduction, anterior screw fixation cannot be used. We report the first case of anterior screw fixation of anteriorly displaced type III odontoid fracture corrected by transoral digital manipulation.
Rapid Repeated Recurrent Lumbar Disc Herniation after Microscopic Discectomies
이도성,엄기성 대한척추신경외과학회 2011 Neurospine Vol.8 No.2
The recurrence of lumbar disc herniation after single-level discectomy is a well-known complication. Pain and neurological symptoms during the first week after surgery can be caused by missed pathology or early recurrent disc herniation. However, recurrent disc herniation that causes segmental instability after repeat operation is rare. Here, we report a case of a 42-year-old woman having a rare complication of rapid recurrent lumbar disc herniation after 2 microscopic discectomies within a short period. We suggest that rapid disc fragmentation and rapid growth of annular defect caused rapid repeated recurrence of lumbar disc herniation and segmental instability. Further investigation will be needed to identify the cause of this rapid disc degeneration.
이도성 서강대학교 경제학연구원, 서강대학교 경제대학원 2005 시장경제연구 Vol.34 No.2
Differential games models in economics are surveyed with special emphasis on technical difficulties encountered in the process of modelling economic problems into differential games models. The problems caused by nonconvexity (or nonconcavity) of the data. by adopting feedback information structure, by introducing infinite horizons, and by modelling Stackelberg games are pursued. Sufficient condition without convexity which is known as Jacobi's conjugate point theory is introduced as a pertinent alternative for convextity conditions. Some recent applications of differential games are surveyed.