• Proceedings of the IEEK Conference
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• 2002.06e
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• pp.121-124
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• 2002

This paper explains the system which finds the data of the joint of Wire Frame(that express the body structure of the golfer) from standard golf swing movie. Also, this paper used interpolation and the method which modify the distance between a joint and a close joint to general new joint data. Last this paper explains the system that make a standard golf swing attitude by continuous display the static attitude(which are formed with Wire Frame) of golf swing operations.

• Proceedings of the IEEK Conference
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• 2002.06c
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• pp.223-226
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• 2002

If one can easily modify the existing motion data to a new motion in making an animation movie, he can save a lot of time for graphic design. To implement this kind of system, we propose a PC-based system composed of low cost commercial animation tool (3D Studio Max) for visualization of the animation and motion editing module that handles optimization process during the motion transform. Researchers studying advanced motion transform techniques only have to focus on the mathematical manipulation of the motion data

• The Transactions of The Korean Institute of Electrical Engineers
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• v.58 no.12
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• pp.2391-2395
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• 2009

Active control schemes which modify the excitation to correct for any of the nonideal characteristics of the SPMSM is described. Especially, because of design limitations(size and cost) in automobile, the back-EMF of SPMSM can't be perfectly designed with sinusoidal wave and iron core of stator is saturated so that torque ripple is unavoidable. An active cancellation method of the pulsating torque components which would otherwise be generated using the classic sinusoidal current excitation is illustrated.

• Korean Institute of Interior Design Journal
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• no.41
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• pp.172-179
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• 2003

The goal of this paper was to analyze the skylight type and there architectural aesthetic effects in museum. The results of this investigation was based on the study of the skylight applications of museums meaning concerning this theme. It could distinguish among dome, upper skylight, side skylight and totally opened skylight according to the viewpoint of the architectural aesthetics and the lighting. Secondly were above-mentioned skylight and the design of fenestration used as a design element in order to influence and modify space and form.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2003.07a
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• pp.43-46
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• 2003

At SIC 2001, Popescu proposed m efficient group signature scheme for large groups［1］. However, this paper shows that his scheme is to be insecure by presenting a signature forgery. Using our attack, anyone (not necessarily a group member) can forge a signature on a message m, and sine the attacker doesn't have to be the group member, the revocation manager cannot reveal the identity of the signer. Additionally, we modify Popescue's scheme to prevent the forgeary.

• Journal of the Korean Operations Research and Management Science Society
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• v.22 no.1
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• pp.1-24
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• 1997

In this paper, we have proposed new solution methods to solve TSLP (two-stage stochastic linear programming) problems. One solution method is to combine the analytic center concept with Benders' decomposition strategy to solve TSLP problems. Another method is to apply an idea proposed by Geoffrion and Graves to modify the L-shaped algorithm and the analytic center algorithm. We have compared the numerical performance of the proposed algorithms to that of the existing algorithm, the L-shaped algorithm. To effectively compare those algorithms, we have had computational experiments for seven test problems.

• Journal of Computing Science and Engineering
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• v.4 no.2
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• pp.110-127
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• 2010

In this study, we propose a method for encoding documents into string vectors, instead of numerical vectors. A traditional approach to text categorization usually requires encoding documents into numerical vectors. The usual method of encoding documents therefore causes two main problems: huge dimensionality and sparse distribution. In this study, we modify or create machine learning-based approaches to text categorization, where string vectors are received as input vectors, instead of numerical vectors. As a result, we can improve text categorization performance by avoiding these two problems.

• Journal of applied mathematics & informatics
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• v.16 no.1_2
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• pp.195-205
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• 2004

To the unconstrained programme of non-convex function, this article give a modified BFGS algorithm. The idea of the algorithm is to modify the approximate Hessian matrix for obtaining the descent direction and guaranteeing the efficacious of the quasi-Newton iteration pattern. We prove the global convergence properties of the algorithm associating with the general form of line search, and prove the quadratic convergence rate of the algorithm under some conditions.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2006.11a
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• pp.322-325
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• 2006

The research project evaluates different infrastructure project delivery methods used internationally. The goal is to define the main benefits, deficiencies, and requirements of the project delivery systems for both the short term and long term perspectives. Also, the research attempts to determine alternatives to modify and to promote change in the current infrastructure project delivery methods in order to make the processes more efficient with value added benefits to all participants.

• 제어로봇시스템학회:학술대회논문집
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• 2000.10a
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• pp.255-255
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• 2000

Technical advance of electrical chart and cruising equipment make it possible to sail without a man. It is important to decide the cruising route in view of effectiveness and stability of a ship. So we need to study on the optimal trajectory planning. Genetic algorithm is a strong optimization algorithm with adaptational random search. It is a good choice to apply genetic algorithm to the trajectory planning of a ship. We modify a genetic algorithm to solve this problem. The effectiveness of the revised genetic algorithm is assured through computer simulations.