• 한국정보통신설비학회:학술대회논문집
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• 2003.08a
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• pp.201-203
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• 2003

MPEG-21 멀티미디어 프레임워크는 다양한 터미널과 네트워크 환경에 있는 접속기기들 간에 멀티미디어 컨텐츠를 투명하고 널리 사용하게 하는 데에 그 목적이 있다. MPEG-21의 많은 요소 기술 가운데 컨텐츠에 대한 접근 및 변경 등에 관련한 권리 사항을 표현하는 것과 관련하여 권리 표현 언어를 표준화하고 있다. 본 논문에서는 권리 표현 언어의 구조 등에 대하여 알아보고 관련 표준화 동향을 알아보고자 한다.

• 한국생물공학회:학술대회논문집
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• 2005.10a
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• pp.962-963
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• 2005

• Journal of the Korean Institute of Telematics and Electronics A
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• v.31A no.5
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• pp.18-26
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• 1994

We express fundamental second-order and third- order harmonic distortions and intermodulation distortions in terms of the laser parameters. Compared to the Darcie `s result only limited to the high frequency (f >1GHz), these expression are quite valid in the entire modulation frequency region. It is found that the fundamental nonlinear distortions are strongly effected by the spontaneous emission to lasing mode as well as the gain compresion damping in the low frequency region.

• Journal of the Korean Institute of Telematics and Electronics
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• v.4 no.2
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• pp.29-34
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• 1967

On clarifing radiations from antenna, it is necessary to consider the contribution of the current distribution on te conductive supporter. The expression has not only analized the total radiative current distribution on the dipole antenna and its conductive supporter, in case when the former was placed closely and in parallel to the latter, but also shown the results of practical experiment.

• Proceedings of the IEEK Conference
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• 2001.06b
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• pp.361-364
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• 2001

This paper presents a simple method for estimating the maximum crosstalk noise of on-chip grobal wires. For the derivation of the maximum crosstalk expression we have modeled wires using lumped-elements that are composed of R, L and C. We have also used experimental constant to reduce the modeling error. The accuracy of the proposed method is verified by comparing against the HSPICE simulation results under the present process parameters and environmental conditions. The results of the proposed method can be used as an estimator in design-aid tools.

• Proceedings of the IEEK Conference
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• 1999.11a
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• pp.720-723
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• 1999

For that the attitude control performance test of the satellite, dynamic analysis of satellite structure performed in reference with KOREASAT, and the equation of motion of rigid bodies was derivated. For attitude stability, Lyapunov's stability theorem and state space expression were applied to dynamic equation of satellite. To prove efficiency of our method, simulations are performed and result are shown.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.19 no.38
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• pp.43-50
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• 1996

Evolution Programs, a form of Genetic Algorithms transformed from chromosome representation, are applied to the Timetabling of University which is one of the NP-hard problems. At the step of algorithms application, each class is established to be a specific category in feasible solution space. At. the same time, the exiting gene used in chromosome expression of Evolution Programs is modified to satisfy constraints effectively by transformation of gene which has multi-information. The new crossover method for fester operation in the Recombination attempted.. Roulette wheel selection and tournament selection are prepared.

• Proceedings of the IEEK Conference
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• 2002.06c
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• pp.161-164
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• 2002

The informal specification technique lacks abstraction and preciseness. On the other hand, the formal specification technique makes the developer difficult to express and understand the software specification, because it contains mathematical expression. This paper proposes DSC(Domain Specification Component) to solves these problems. DSC supports the understanding of problem domain and improves reusability with selecting the strong point of informal and formal specification technique. We applied the proposed DSC to CMIP-based network management manager software. And we analyzed the effects of the reusability and confirmed the increase of the reusability.

• Journal of the Korean Mathematical Society
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• v.57 no.3
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• pp.641-653
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• 2020

To extend the well-known extremal characterization of the geometric mean of two n × n positive definite matrices A and B, we solve the following problem: $${\max}\{X:X=X^*,\;\(\array{A&V&X\\V&B&W\\X&W&C}\){\geq}0\}$$. We find an explicit expression of the maximum value with respect to the matrix geometric mean of Schur complements.

• The Journal of the Acoustical Society of Korea
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• v.15 no.3E
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• pp.19-26
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• 1996

In this paper, convergence properties of the LMS, LMF, and LVCMS algorithms are investigated under the assumption of the uncorrelated Gaussian input data. By treating these algorithms as special cases of more general algorithm family, unified results on these algorithms are obtained. First the upper bound on the step size parameter is obtained. Second, an expression for misadjustment is obtained. These theoretical results confirm earlier LMS works. Further, the results explain why the LMS and LVCMS algorithms are experiencing difficulties with plant noise having heavier tailed densities. Simulation results agree with theoretical expectation closely for various plant noise statistics.