• Transactions of the Korean Society of Mechanical Engineers
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• v.18 no.9
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• pp.2339-2348
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• 1994

The objective of this paper is to develop a solution method for the differential-algebraic equation(DAE) derived from constrained muti-body dynamic systems. Mechanical systems are often modeled as bodies and joints. Differential equations of motion are formulated for bodies. Since the bodies are connected by joint, the differential variables must satisfy the kinematic constraint equations that come from the joints. Difficulties are arised due to drift of the differential variables off the constraint equations. An optimization method is adopted to correct the drift of the differential variables. To demonstrate the efficiency of the proposed method a slider-crank mechanism is analyzed dynamically. Identical results are obtained as these from the commercial program DADS. Dynamic analysis of a High Mobility Multi-purpose Wheeled. Vehicle(HMMWV) is carried out to show the practicalism of the proposed method.

• Transactions of the Korean Society of Automotive Engineers
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• v.4 no.4
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• pp.9-17
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• 1996

This paper develops a sequential updating method of the Euler parameter generalized coordinates for the machine kinematics and dynamics, The Newton's method is slightly modified so as to utilize the Jacobian matrix with respect to the virtual rotation instead of this with repect to the Euler parameters. An intermediate variable is introduced and the modified Newton's method solves for the variable first. Relational equation of the intermediate variable is then solved for the Euler parameters. The solution process is carried out efficiently by symoblic inversion of the relational equation of the intermediate variable and the iteration equation of the Euler parameter normalization constraint. The proposed method is applied to a kinematic and dynamic analysis with the Generalized Coordinate Partitioning method. Covergence analysis is performed to guarantee the local convergence of the proposed method. To demonstrate the validity and practicalism of the proposed method, kinematic analysis of a motion base system and dynamic analysis of a vehicle are carried out.

• Lingua Humanitatis
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• v.1 no.2
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• pp.221-228
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• 2001

This article criticizes Professor Nam-Sik Park's understanding and proposals on the educational implementation of English Linguistcs in Korea. First of all, this article claims that 'studying English' cannot be the primary goal of 'doing English linguistics', arguing that the curriculum related to the English linguistics should not be altered on the basis of the practical use of English linguistics. The article furthermore criticizes Professor Park's narrow view on the 'practicalism'. Criticism is also addressed to Professor Park's undesirable and unduly clear-cut dichotomy on 'data' versus 'theory', 'subject' versus 'object', 'theoretical linguistics' versus 'applied linguistics', and 'English linguistics' versus 'linguistics', while the author's fundamental emphasis is given to the idea that humanistic understanding of English language is neccessary for proper and extensive comprehension and application of English linguistics in Korea.

• Korean Institute of Interior Design Journal
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• v.23 no.3
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• pp.100-107
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• 2014

Traditional architectural space, which is a historical cultural heritage must be connected mutually as a organic flow of various elements such as the environment of the time, political background and values, rather than approaching with fragmentary point of view. The Silhak Philosophy, the basis of late Chosun society developed equity thoughts on the basis of ideology of humanism, and it asserted the promotion of technology and industry as a measure to realize the pursuit of truth which is practically useful. Thus, we could verify the possibility of convergent interpretation of cultural technology of Hwaseong architectural space through the humanistic viewpoint of pioneer spirit of Silhak Philosophy which regards human as a main agent of desire of life, and the pursuit of truth which is useful for reality, and the realization of ethical value by aesthetic practicalism. Based on this, the ontological meaning and value of Suwon Hwaseong by the viewpoint of convergence of culture and technology have been drawn as the construction of planned new town by the practice of filial duty, the plan of city space based on rational values, the realization of a metropolis where self-sufficient economic activities are possible, the introduction of thorough construction management system, the introduction of advanced culture and its creative application, and the application of scientifical knowledges and cutting-edge technology.

• The Journal of the Korea Contents Association
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• v.13 no.1
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• pp.234-246
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• 2013

Microcredit was first introduced by non-profit organization in early 2000s and the Ministry of Health and Welfare promoted the support policy of self-support community and the hope-developing bank. And then, microcredit policy was suddenly changed while the microfinance policy was promoted in 2009. For example, there were changes of the control tower of the policy, the emphasis on financial approach from welfare approach, the establishment of the operation agency. This study analyzed the policy changes on microcredit policy using the framework of Hood(1994) and Joo(1999) in order to analyze causes of sudden changes. As results, the reason affecting microcredit policy change was changes of an unemployment rate and the financial environment, the change of outside situation, the policy idea of the middle practicalism of government and the success of the experiment in microcredit, the passive intervention of stakeholders, the internal factors on the policy custom. So the results suggests that the policy is produced illogically because of the absence of stakeholders' participation.

• Journal of Digital Convergence
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• v.15 no.2
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• pp.327-334
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• 2017

For enhancing network efficiency, various applications/services like CDN and P2P try to utilize content which have previously been cached somewhere. Content-centric networking (CCN) also utilizes data caching functionality. However, dislike CDN/P2P, CCN implements such a function on network nodes. Then, any intermediated nodes can directly respond to request messages for cached data. Hence, it is essential which content is cached as well as which nodes cache transmitted content. Basically, CCN propose for every nodes on the path from the content publisher of transmitted object to a requester to cache the object. However, such an approach is inefficient considering the utilization of cached objects as well as the storage overhead of each node. Hence, various caching mechanisms are proposed to enhance the storage efficiency of a node. In this paper, we analyze the performance of such mechanisms and compare the characteristics of such mechanisms. Also, we analyze content utilization patterns and apply such pattern to caching mechanisms to analyze the practicalism of the caching mechanisms.

• Cartoon and Animation Studies
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• s.30
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• pp.87-112
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• 2013

The effort to make the peaceful mood between South and North Korea that had started from so-called 'Sunshine Policy' of the People's Government since 1998, lasted until Rho Mu-hyun government. On the other hand, Lee Myung-bak government changed the policy toward North Korea to more practical and principle-oriented one than the previous two governments. By the shift of the policies, the industry of animation of South and North Korea has been influenced so much. The purpose of his study is to point out the crisis of the status of the animation industry of the Korean Peninsula through the change of the policies, and to propose one method of the new paradigm to the next government in order to build a turning point of South and North Korea animation exchange. First, the paradigms toward North Korea through the past governments are compared. Second, the result and situation of animation industry of South and North Korea are analyzed. Finally, by examining deducted problems, the forward policy toward North Korea and, by extension, the improvement direction and practical tasks of South and North Korea animation exchange policy are considered.