• 한국의류학회지
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• 제32권3호
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• pp.505-516
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• 2008

Image which appears in fashion illustration on the late twentieth century is not the representative image as an equivalence to the real fashion styles but the virtual image which bears no relation to any reality. The purpose of this study is review the concept of virtuality and analyze in which way virtual image is expressed in fashion illustrations on the background of Jean Baudrillard's simulacre theory. In post-modem paintings the expression methods of image-virtualization were image mixing through photo-image appropriation, image overlapping, and the icons inserted unreasonably, the focus-out effect through scrubbing and the over-painting on the photograph. Image-virtualization in fashion illustration was expressed through image mixing and expression of image uncertainty. Image mixing was made by photo-image appropriation, image overlapping, connection of heterogeneous images and using interface image, and uncertain image was expressed through the expression of visual ambiguity and virtual movement.

• Journal of Electrical Engineering and Technology
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• 제7권1호
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• pp.124-131
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• 2012

This paper deals with robust stability of linear time-invariant (LTI) systems with unstructured uncertainties. A new relation between uncertainties and system poles perturbed by the uncertainties is derived from a graphical analysis. A stability criterion for LTI systems with uncertainties is proposed based on this result. The migration range of the poles in the proposed criterion is represented as the bound of uncertainties, the condition number of a system matrix, and the disc containing the poles of a given nominal system. Unlike the existing methods depending on the solutions of algebraic matrix equations, the proposed criterion provides a simpler way which does not involves algebraic matrix equations, and a more flexible root clustering approach by means of adjusting the center and the radius of the disc as well as the condition number.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2012년도 학술발표회
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• pp.467-467
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• 2012

As the features of recent flood are spatially concentrated, loss of life and property increase by the impact of climate change. In addition to this the public interest in water control information is increased and socially reasonable justification of water control policy is needed. It is necessary to estimate the flood risk in order to let people know the status of flood control and establish flood control policy. For accurate flood risk analysis, we should consider inter-relation between causal factors of flood damage. Hence, flood risk analysis should be applied to interdependence of the factors selected. The Bayesian networks are ideally suited to assist decision-making in situations where there is uncertainty in the data and where the variables are highly interlinked. In this research, to provide more proper water control information the flood risk analysis is performed using the Bayesian networks to handle uncertainty and dependency among 13 specific proxy variables.

• 한국멀티미디어학회논문지
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• 제3권5호
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• pp.550-556
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• 2000

러프집합에서는 식별불능관계와 근사공간 개념을 이용해서 불완전 정보로부터 최적화된 결정규칙을 유도하게 된다. 그러나, 처리 하고자 하는 정보에 정량적이거나 중복 또는 누락된 데이터가 포함된 경우에는 오류가 발생될 수 있으므로, 이러한 데이터들을 제거하거나 최소화시키는 방법이 필요하다. 정보처리 분야에서 불확실성이나 정보의 양을 측정하는데 사용되고 있는 엔트로피는 러프 관계 데이터베이스의 불완전 정보를 제거하는데 사용되었다. 그러나, 정보시스템에 포함될 수 있는 불완전 정보를 모두 다루지는 못하였다. 본 논문에서는 정보시스템의 조건속성과 결정속성에 포함될 수 있는 불완전 정보를 제거하기 위한 정보 이론적 척도로서 러프집합을 이용한 객체관계 엔트로피와 속성관계 엔트로피를 제시한다.

• 한국지진공학회:학술대회논문집
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• 한국지진공학회 1999년도 추계 학술발표회 논문집 Proceedings of EESK Conference-Fall
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• pp.64-71
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• 1999

Seismicity of the Korean Peninsula shows intraplate seismicity that has irregular pattern in both time and space. Seismic data of the Korean peninsula consists of historical earthquakes and instrumental earthquakes. In this study we devide these data into complete part and incomplete part and considering earthquake size uncertainty estimate seismic hazard parameters - activity rate λ, b value of Gutenberg-Richter relation and maximum possible earthquake IMAX by statistical method in each major tectonic provinces. These estimated values are expected to be important input parameters in probabilistic seismic hazard analysis and evaluation of design earthquake.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집A
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• pp.758-763
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• 2001

A concept called Allowable Load Set (ALS) is introduced and methods of finding its boundaries are developed. The resulting diagram allows an easy understanding of load and strength characteristics of a structure in relation to structural integrity under uncertain loading conditions. An allowable load diagram for an ALS visualizes the relation between a prescribed load and a degree of safety of the structure. During the application of the algorithms, critical areas of the structure are identified. A systematic method of finding the allowable load sets for multi-body mechanical systems is especially presented and applied to an excavator as a realistic case.

• 산업경영시스템학회지
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• 제36권4호
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• pp.64-70
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• 2013

Estimation approaches for casual relation model with high-order factors have strict restrictions or limits. In the case of ML (Maximum Likelihood), a strong assumption which data must show a normal distribution is required and factors of exponentiation is impossible due to the uncertainty of factors. To overcome this limitation many PLS (Partial Least Squares) approaches are introduced to estimate the structural equation model including high-order factors. However, it is possible to yield biased estimates if there are some differences in the number of measurement variables connected to each latent variable. In addition, any approach does not exist to deal with general cases not having any measurement variable of high-order factors. This study compare several approaches including the repeated measures approach which are used to estimate the casual relation model including high-order factors by using PLS (Partial Least Squares), and suggest the best estimation approach. In other words, the study proposes the best approach through the research on the existing studies related to the casual relation model including high-order factors by using PLS and approach comparison using a virtual model.

• 대한간호학회지
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• 제36권7호
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• pp.1215-1223
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• 2006

Purpose: This study was done to understand elderly women within a community who have used lots of drugs. Method: Data was collected through in-depth interviews with four elderly women from April 2001 to February 2002. Data was analyzed by Giorgi's phenomenological method(2000). Results: The components in common with drug usage of elderly women were as follows: 'Awareness of the limitation of physical strength and uncertainty of life', 'Dread of a crisis situation occurring', 'Attachment and dependency on drugs', 'Expectation of a comfortable life and death', 'Prevention of family burden', and 'Pursuit of psychological comfort'. The general structure of experiences was as follows: causal factors were 'Awareness of uncertainty and limitation', 'dread of a crisis situation occurring' the results factor was 'Attachment and dependency on drugs' and the facilitating factors were 'Expectation of a comfortable life and death', 'Prevention of family burden', and 'Pursuit of psychological comfort'. The causal relation was cyclic. This structure showed a realistic adaptation pattern. Conclusion: This study contributed to provide fundamental data for nursing interventions for health promotion and promoting quality of life in elderly women by increasing understanding of the experiences of drugs use.

• 한국수자원학회논문집
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• 제36권3호
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• pp.399-411
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• 2003

Nash의 관측평균순간단위도의 신뢰구간을 결정하는 기법을 개발하였다. 이 방법은 두 매개변수를 Box-Cox 변환과 유역의 상사성관계식을 이용하여 이변수정규분포의 확률변수화하고 이들의 선형 상관관계를 이용한 통계적 추정과정과 더불어 parametric bootstrap 방법을 이용한 단위도의 신뢰구간 산정 등으로 구성된다. 또한 이 방법은 미계측유역에 대한 단위도 추정에도 이용이 가능한 특징을 갖고 있다. 위천유역에 대하여 제안된 방법을 적용한 결과 제시된 방법론은 단위도의 불확실성을 평가하고 그리고 미계측 유역에 대한 매개변수 추정에 있어서 적절한 대안임을 확인할 수 있었다.

• 기술혁신학회지
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• 제1권3호
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• pp.285-298
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• 1998

Innovation with strategic interaction is to overcome the technological uncertainty and to create co-evolution through competition among individuals or organizations for the acceleration of innovation. The concept of innovation in the past was concentrated on cooperation rather than on competition for the efficient management of limited resources. However, in order to minimize the technological uncertainty, we need an innovation on the basis of competition between organizations. Competition stimulates technological adaptability. It is on the analogy of complex system. This is to satisfy consumers' needs, to transform the resources into a technology, and to apply for the development of new products and new technologies. If the emergence of a new technology threatens present technology and develops into a new level of technology through inter-relation, it becomes a mutually supporting technologies. When theses effects are simultaneously realized, it is possible for firm to have strategical innovation and to create a mutually evolutionary development. Furthermore, when the competition among more than two individuals or two organizations continues towards the same direction, the mutual competition and cooperation can be expected to create a synergy effect. The competitive environment should be composed of R&D, production, and consumers' choice. This will lead to interaction among organizations through strategic competition and cooperation. Intra-firm competition and Inter-firm competition are required to exist together.