• 제어로봇시스템학회:학술대회논문집
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• 1989.10a
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• pp.127-130
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• 1989

The redundant manipulator extends the application fields of classical nonredundant manipulators. In this paper, we propose Premultiplier Model that describes the static behavior of redundant manipulator. This model provides insight and intuition about algebra and physics related to redundant manipulators. Active operational space stiffness control of redundant manipulators is proved to be always unstable and we propose a technique, based on our methodology, to make stiffness control stable.

• Bulletin of the Korean Chemical Society
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• v.23 no.5
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• pp.736-740
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• 2002

An efficient and practical synthetic method of △1 -3-octalone, which is a versatile building block for thesyntheses of polycyclic compounds, has been developed. The dianion of ethyl acetoacetate reacts with cyclohexene-1-carboxaldehyde (3) to produce the aldol adduct 6, which then undergoes Mn(Ⅲ)-mediated radical cyclization followed by acetate elimination to give △1 -3-octalone 4. A detailed mechanistic insight of Mn(Ⅲ)-mediated cyclization of 6 has been disclosed.

• Proceedings of the IEEK Conference
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• 1999.06a
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• pp.500-503
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• 1999

In this paper, we analyze weight distributions of neural networks. If we construct a vector containing all weights of a neural network, then training process can be viewed as finding a solution point in the weight space. In order to obtain insight into the training process of neural networks, we investigate the distribution of the solution points in the weight space Experiments provide some interesting results, showing that solution points tend to form clusters in the weight space and the information may be used to speed up the training process.

• Proceedings of the KSR Conference
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• 2001.10a
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• pp.435-444
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• 2001

In the Korea, railroad accidents result in about 5.4 railroad run-off crashes every year and account for approximately 93 percent of all railroad accident frequency. Despite the number, quantification of the possible countermeasure has been limited and also railroad safety control after private management for railroad has not been established. Therefore, this study provides some initial insight into the important safety problem by introducing some example, including some detailed safety regulations in both British and U.S. to develop appropriate railroad safety management system.

• Journal of the Korean Operations Research and Management Science Society
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• v.14 no.2
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• pp.97-104
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• 1989

This paper extends the existence proofs of a Nash equilibrium to a more general class of differentila game models with constraints on the control spaces. With the assumptions of continuity, convexity, and compactness, the existence is proved using Kakutani Theorem and via a path-following approach. Furthermore, the proof for a period-by-period optimization of multi-period problems provides an insight to a numerical solution algorithm to differential game models with constraints.

• Annals of Clinical Neurophysiology
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• v.22 no.1
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• pp.8-12
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• 2020

Chronic inflammatory demyelinating polyneuropathy (CIDP) is an immune-mediated neuropathy with heterogeneous features. Appropriate treatment will produce a favorable outcome, but a poor treatment response and severe disability have also been reported. The roles of the clinical phenotypes and electrophysiological features of CIDP as well as of autoantibodies against nodal and paranodal proteins have been highlighted previously due to their association with the treatment response and long-term prognosis. This review addresses the diverse factors associated with the prognosis of CIDP.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.193-194
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• 2017

본 연구에서 다루고자 하는 마스크 디자인은 개인의 감정과 사고를 적극적으로 표현하기에 적합한 예술 영역에 해당한다. 따라서 마스크에 디자인된 조형미를 살펴보기 위해 디자인 된 마스크의 유형을 분류하고자 한다. 자유주제로 완성된 마스크디자인 작품을 그룹핑 하였으며, 최종적으로 데카탕스(Decadence), 판타지(Fantasy), 인사이트(Insight), 러블리(Lovely), 키치(Kitsch), 하이퍼 테크노(Hyper Techno)의 6가지 유형으로 도출하게 되었다. 이와 같은 유형 연구는 창의적인 마스크 디자인에 대한 정체성을 파악하는 데에도 매우 중요한 역할을 할 것이며, 관련 연구의 기초적인 토대를 마련하는 계기가 될 것으로 기대한다.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1995.04a
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• pp.35-36
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• 1995

To gain insight into the etiological mechanism of dementia and to develop clinically effective congnitive enhancers, it is required to prepare animal models with symptoms and mechanism resemble to that in human. Dementia is mainly classified into two types : senile type of Alzheimer's disease (STAD) and cerebral ischemia-induced one. As animal models of cerebral ischemia, a couple of types in rats have been introduced : one is the occlusion of bilateral carotid arteries-induced forebrain/global ischemia and the other is the occlusion of middle cerebral arteries-induced focal/regional ischemia.

• Journal of Pharmaceutical Investigation
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• v.26 no.3
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• pp.207-213
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• 1996

The kinetic change of electrical resistance of hairless mouse skin as a function of ionic strength of the bathing medium was determined from impedance measurements. After increasing (decreasing) the ionic strength of the bathing medium, resistance decreased (increased) continuously with time, finally reaching an equilibrium value. We have modelled this process, using nonsteady-state diffusion kinetics. The results show semi-quantitative correlation between theoretically derived and experimentally obtained values. Overall, this work provides further mechanistic insight into ion-conduction through the skin.

• Korean Journal of Environmental Biology
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• v.32 no.4
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• pp.395-396
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• 2014

The present note provides an overview of the three succeeding scientific papers, which gives an insight about the multidisciplinary studies and opinion on Biodiversity. These three papers are based on the seminar series of biodiversity organized by the department of life science, Hanyang University during 2011~2013.