• Proceedings of the KIEE Conference
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• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 B
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• pp.685-688
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• 2003

In this paper, a performance comparison between two blind signal estimation algorithms in a LTI channel is considered. The two algorithms, Iterative Least-Squares with Projection (ILSP) and a modified ILSP, are based on the finite-alphabet property of input symbols. This case typically arises in a multiple access system with a sensor array antenna at the receiving end. We start with the formulation of a maximum-likelihood (ML) estimation problem under an additive white Gaussian noise assumption. A blind ML estimator is derived with its iterative algorithm for calculation. Then we narrow down the consideration of this problem to QPSK case so that a modified algorithm is proposed for $\pi$/4-QPSK case. The modified version is compared with the original ILSP algorithm in terms of the rate of the convergence to global minima. A computer simulation shows that the modified algorithm gives a better performance. This result implies that the performance of the blind separation algorithms may be greatly improved by adopting a smart coding scheme with rich structure.

• Asia Marketing Journal
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• 제6권3호
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• pp.83-98
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• 2004

The objective of HyundaiCard is to study its differentiated marketing strategy based on consumer lifestyle. HyundaiCard M as late follower in card market must do creative strategy to catch-up pioneer and early follower. But existing HyundaiCard M has a few problems that are its weak service package, marketing communication, less efficient channel, and low brand awareness. To cover these strategic problems this company formulated "M" remarketing strategy and implemented these tactics: segmenting customer based on lifestyle and doing alphabet marketing. Alphabet marketing means differentiated marketing named S, T, U, A, K based on consumer lifestyle.

• Proceedings of the Korea Society of Design Studies Conference
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• 한국디자인학회 2002년도 봄 학술발표회 논문집
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• pp.220-221
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• 2002

• Proceedings of the KSPS conference
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• 대한음성학회 1996년도 10월 학술대회지
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• pp.294-299
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• 1996

• MALSORI
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• 제31_32호
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• pp.23-50
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• 1996

• Proceedings of the IEEK Conference
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• 대한전자공학회 2000년도 하계종합학술대회 논문집(3)
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• pp.19-22
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• 2000

This paper presents new on-line handwritten algorithm for continuous alphabet uppercase characters. The algorithm is based on the idea that alphabet uppercase character consists of at most 4 strokes. It tries to determine the maximum output for a recognition result among outputs of four recognizers which have the capacity to discriminate the character using from 1 through 4 stroke information. The recognition module has 4 neural network based recognizers, which can recognize from 1 through 4 stroke character. We also use specialized post-processing techniques for improving the recognition performance. Trained on 440 input data and choosing 390 uppercase words for a recognition test we reached a 92% recognition rate.

• Journal of The Korean Association For Science Education
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• 제8권2호
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• pp.17-22
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• 1988

Computer based instruction in the elementary science curriculum will be played an important role through the fifth curriculum reform from the 1989 school year. This is essential for the science instruction because the strategies on the problem-solvings and inquiry approaches can be utilized for the science classroom. Computer education can be thought as the education about the computer and the education using the computer. Of them the education using the computer means the computer assisted instruction(CAI) what is called all the possible activities using the computer in the classroom. Student achievement as the result of CAI depends on the learning activities of students and the instructional techniques and strategies of teachers using the computer. However, computer based education to enhance the student achievement is pointed out the lacks of the standardized Korean alphabet code and the compatibility of qualified software. These problems will be relieved according to the coding for the Korean alphabet of SUPER PILOT program language.

• 한국HCI학회:학술대회논문집
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• 한국HCI학회 2006년도 학술대회 2부
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• pp.140-146
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• 2006

한글은 자음과 모음이 한눈에 구분되는 세계 유일의 표음문자이다. 14 개의 자음과 10 개의 모음을 조합하여 글자를 만들어 내는 한글의 문자 구성원리의 우수성은 이미 세계가 인정하고 있으며, 영국 리스대학의 Geoffrey Sampson 음성언어학 교수는 물리적, 철학적 원리를 문자화한 한글을 새로운 차원의 Feature System 으로 분류하기도 하였다. 본 연구는 이러한 한글의 그 형상학적 생성원리를 바탕으로 이동통신 단말기의 문자입력 시스템의 사용성 증대를 위한 인터페이스 디자인에 그 목적이 있다. 이를 위하여 본 연구에서는 한글의 Feature System 을 응용한 이동통신 단말기의 새로운 문자입력 시스템의 인터페이스를 개발하고, 이를 기존의 이동통신 단말기를 위한 문자입력 방식과 비교 검증하여 그 사용성을 검증하고자 한다.

• Journal of applied mathematics & informatics
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• 제5권1호
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• pp.191-200
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• 1998

There are two types of composition systems for the Korean alphabet: a combined system and a composite system. This paper decribes an efficient coding method for both of these two types. Using this coding method with the combined system yields about 10.5% code-length savings per a Korean character while it yields about 45% savings with the composite system. In other words the coding method produces a better result(i.e. 34.5% better) with the composite system than with the combined system. The simulation has been performed on a MasPar machine having 64 processors. The results show that the combined system achieved a 45.851-fold speedup while the composite system achieved a 47.274-fold speedup.

• Korean Journal of Cognitive Science
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• 제5권2호
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• pp.5-23
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• 1994

The present research measured interkey times in typewriting according to the mumber of consonants and vowels within words of the Korean alphabet. And another purpose of this study was to investigate whether the perception of syllable and final consonant, and one hand repetition can influence the interkey times in typewriting or not. The procedure of experiment was that subjects typed works according to the conditions. And we analyzed interkey times of each words. The results has shown that the perception of syllable and final consonant, and one hand repetition influenced the interkey times in typewriting.