• 응용통계연구
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• 제31권6호
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• pp.707-719
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• 2018

시계열 데이터의 분류와 군집화를 효율적으로 수행하기 위해 다양한 시계열 표현 방법들이 제안되었다. 본 연구는 Lin 등 (2007)이 제안한 국소 평균 근사를 이용하여 시계열의 차원을 축소한 후 심볼릭 자료로 이산화하는 symbolic aggregate approximation (SAX) 방법의 개선에 대해서 연구하였다. SAX는 국소 평균 근사를 할 때 등간격으로 임의의 개수의 세그먼트로 나누어 평균을 계산하여 세그먼트의 개수에 그 성능이 크게 좌우된다. 따라서 본 논문은 불균형 Haar 웨이블릿 변환을 통해 국소 평균 수준을 등간격이 아니라 자료의 특성을 반영하여 자료 의존적으로 선택하게 함으로써 시계열의 차원을 효과적으로 축소함과 동시에 정보의 손실을 줄이는 방법에 대해서 제안한다. 제안한 방법은 실증 자료 분석을 통해 SAX 방법을 개선시킴을 확인하였다.

• 한국자동차공학회논문집
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• 제9권1호
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• pp.148-155
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• 2001

A disassembility assessment has mostly depend on the subjective decision making from the qualitative element. The work of disassembly is already classified with given disassemble points from the symbolic chart method. It is not useful in the practical assessment because it is not specified. The new method of design for disassembility assessment(DFDA) is practical to introduce the fuzzy number as the conversion of quantitative element from qualitative. It is appled to air-cleaner of passenger-vehicle for the usefulness.

• 한국생물정보학회:학술대회논문집
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• 한국생물정보시스템생물학회 2005년도 BIOINFO 2005
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• pp.272-277
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• 2005

We introduce a new approach to optimize the parameters in biological kinetic models by quantifier elimination (QE), in combination with numerical simulation methods. The optimization method was applied to a model for the inhibition kinetics of HIV proteinase with ten parameters and nine variables, and attained the goodness of fit to 300 points of observed data with the same magnitude as that obtained by the previous optimization methods, remarkably by using only one or two points of data. Furthermore, the utilization of QE demonstrated the feasibility of the present method for elucidating the behavior of the parameters in the analyzed model. The present symbolic-numeric method is therefore a powerful approach to reveal the fundamental mechanisms of kinetic models, in addition to being a computational engine.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1994년도 추계학술대회 논문집
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• pp.653-657
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• 1994

A symbolic performance analysis approach for flexible for manufactring systems (FMS) can be formulated based on the integration of Petri Nets (PN) and moment generating function (MGF) concept. In this method, generalized stochastic Petri Nets are used to define performance models for FMS, then MGF nased approach for evaluating stochastic PN is used to derive performance parameters of PN, and finally system performance is calculated. A GSPN model of machine cell is shown to illustrate the proposed method for evaluating such performance indices as production rate, utilization, work-in-process and lead time. The major advantage of this method over existing performance evaluation of FMS is the ability to compute symbolic solutions for performance. Finally future research toward automating performance measure for GSPN models of FMS is discussed.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2000년도 추계학술대회논문집 - 한국공작기계학회
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• pp.428-433
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• 2000

A disassembility assessment has mostly depend on the subjective decision making from the qualitative element. The work of disassembly is already classified with given disassemble points from the symbolic chart method. It is not useful in the practical assessment because it is not specified. The new method of design for disassembility assessment(DFDA) is practical to introduce the fuzzy number as the conversion of quantitative element from qualitative. It is appled to compare the usefulness of air-cleaner in Korea-Japan passenger-vehicle.

• 패션비즈니스
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• 제5권5호
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• pp.49-64
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• 2001

Fur is conceived as a material signifier, not only with its commodity value as luxury goods but also as its symbolic value as objects invested by one's libidinal desire. In this study, complex meanings of fur as multi-layered signs of political and sexual power focusing on fetishism shall be explored, especially on the spectacle fetishism acted by mass media during the anti-fur movement in the 1980s. In conjuction herewith, a highlight shall also be made to the symbolic value in fashion design since 1990s. In this study, first, as a theoretical investigation, fetishism, that has been traditionally considered only as sexual fetishism in fashion discourse will be explored in socio-economic level. Second, in historical context, how the meanings and values of fur have become realized in various cultural spaces, such as literature, art, film and finally, fashion will be viewed. In fashion, fur is a product of desire and power influenced by commodity fetishism as well as sexual fetishism. During the anti-fur movement, mass media has developed the concept of spectacle fetishism. Fur is a sign of animal-victim, and fur-clad women is viewed with images full of imperialsm, sexism and racism, thus act as derisive spectacles of consumerism. Since 1990s as a reflection on anti-fur movement, fetishistic characteristics, which challenge traditional operation method, are expressed by disguise, parody, and returning to the nature. First, fur as disguise is intended to hide sexually perverse, decadent characteristics and expensiveness of fur by texturing or patterning techniques. Second, fur as parody uses fake fur or dyed fur in order to satirize erotically and ethnographically fetishized meanings of fur. Third, aboriginal design of fur is adapted to use symbolic values outside the West, which can potentially mobilize antagonistic oppositions out of their fetishistic regimes. In conclusion, fur as sign of female sexuality and its libidinal profits of exchange, has significant symbolic values expressed in fashion.

• 복식문화연구
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• 제11권1호
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• pp.135-152
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• 2003

The purpose of this study is to analyze the symbolic meaning which is immanent in the children´s clothing advertisement text. For the purpose of this research, this study used the semiotic method which are in parallel. Namely, rearranged the R. Barthes´theory and S. Chapman's analysing frame in order to decode meaning which is immanent in the advertisement text, and 1 coded children's clothing advertisement according to the market fractionation cause (age. sex and brand image), and analysed the paradigmatic meaning and socio-cultural meaning- As a result, to carry on the effective children's clothing advertisements. the discriminate paradigmatic system which corresponds with the concept of company brand and the quality of the target consumer should be selected, and the purchaser volition considering desire of target consumer's self image and brand image should be made. Futhermore it should be the social-cultural product reflecting a phenomenon in the social-cultural actual condition. Therefore we must understand the social-cultural meaning in the children's clothing advertisement and then have to establish an advertisement strategy.

• 지능정보연구
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• 제16권4호
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• pp.67-84
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• 2010

미래에 대한 정확한 예측은 경영자, 또는 기업이 수행하는 경영의사결정에 매우 중요한 역할을 한다. 예측만 정확하다면 경영의사결정의 질은 매우 높아질 수 있을 것이다. 하지만 점점 가속화되고 있는 경영 환경의 변화로 말미암아 미래 예측을 정확하게 하는 일은 점점 더 어려워지고 있다. 이에 기업에서는 정확한 예측을 위하여 전문가의 휴리스틱뿐만 아니라 과학적 예측모형을 함께 활용하여 예측의 성과를 높이는 노력을 해 오고 있다. 본 연구는 사례기반추론모형을 예측을 위한 기본 모형으로 설정하고, 데이터 간의 유사도 측정에 퍼지 관계의 개념을 적용함으로써 개선된 예측성과를 얻고자 하였다. 특히, 독립변수 중 기호 데이터 형식의 속성을 가지는 변수들간의 유사도를 측정하기 위해 이진논리의 개념(일치여부의 판단)과 퍼지 관계 및 합성의 개념을 이용하여 도출된 유사도 매트릭스를 사용하였다. 연구 결과, 기호 데이터 형식의 속성을 가지는 변수들 간의 유사도 측정에서 퍼지 관계 및 합성의 개념을 적용하는 방법이 이진논리의 개념을 적용하는 방법과 비교하여 더 우수한 예측정확성을 나타내었다. 그러나 유사도 측정을 위해 다양한 퍼지합성방법(Max-min 합성, Max-product 합성, Max-average 합성)을 적용하여 예측하는 경우에는 예측정확성 측면에서 퍼지 합성방법 간의 통계적인 차이는 유의하지 않았다. 본 연구는 사례기반추론 모형의 구축에서 가장 중요한 유사도 측정에 있어서 퍼지 관계 및 퍼지 합성의 개념을 적용함으로써 유사도 측정 및 적용 방법론을 제시하였다는데 의의가 있다.

• 한국정보통신학회논문지
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• 제14권10호
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• pp.2310-2316
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• 2010

이 논문에서는 형식 검증(formal verification)의 한 분야인 모델 검증(model checking)에 재타이밍(retiming) 기법을 적용하는 방법에서 대해 연구하였다. 재타이밍은 주어진 회로의 레지스터들을 재배치함으로써, 입출력 동작을 바꾸지 않으면서 전이 관계(transition relation)을 변환할 수 있는 기법이다. 이러한 재타이밍을 이용하면 모델 검증을 더 효율적으로 수행하도록 회로를 바꿀 수 있다. 이 논문에서는, 레지스터의 개수와 전이 관계의 특성을 반영한 cost 함수를 제안하고, 재타이밍으로 얻을 수 있는 회로 구조들을 효율적으로 탐색하는 heuristic annealing 알고리즘을 개발한다. 제안된 방법이 모델 검증의 성능을 향상시킬 수 있음을 실험 결과를 통해 보여주었다.

• 영어어문교육
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• 제15권3호
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• pp.33-57
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• 2009

Taking the issues of inequity and power between NES and NNES teachers as a starting point, this qualitative study explores the way the widespread belief of the native speaker fallacy manifests itself in one NNES teacher's teaching life and is linked to the teacher's understanding of herself as an English teacher. Guided by critical applied linguistics (Pennycook, 2001) and using Bourdieu's (1991) theorization of symbolic violence, I conducted an instrumental case study (Stake, 1995) in an ESL writing class at a US university. I collected data through classroom observations and interviews over a nine-month period and analyzed the data using the constant comparison method (Glaser and Strauss, 1967). The findings illustrate the ways the dominant ideology of the native speaker fallacy works to maintain and reproduce the status quo unequal relation between NES and NNES teachers by making all parties involved believe in the artificial sociocultural arrangements that favor NES teachers as legitimate. The findings direct our attention to the importance of critical teacher education that will enable future TESOL professionals to engage in critical reflection on diverse issues and envision transformative change. The findings, in particular, point to the need for language support for NNES teachers in TESOL teacher education.