• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 한국퍼지및지능시스템학회 1998년도 The Third Asian Fuzzy Systems Symposium
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• pp.413-416
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• 1998

In this paper we first show that uniform PR systems and half independent PR systems have same dynamics, and then an important property of this two kinds of systems is derived. The most important property of uniform PR systems is that they have the ability of classifying m-dimensional problabilistic vector into in classes. The significance of studying the dynamics of uniform PR systems are tried from the beginning with a uniform PR system.

• Nuclear Engineering and Technology
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• 제34권6호
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• pp.586-595
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• 2002

The Seismic probabilistic risk assessment (SPRA) or seismic margin assessment (SMA) have been used for the seismic safety evaluation of nuclear power plant structures and equipments. For the SPRA or SMA, the reference response spectrum should be defined. The site-specific median spectrum has been generally used for the seismic fragility analysis of structures and equipments in a Korean nuclear power plant Since the site-specific spectrum has been developed based on the peak ground motion parameter, the site-specific response spectrum does not represent the same probability of exceedance over the entire frequency range of interest. The uniform hazard spectrum is more appropriate to be used in seismic probabilistic risk assessment than the site- specific spectrum. A method for modifying the seismic fragility parameters that are calculated based on the site-specific median spectrum is described. This simple method was developed to incorporate the effects of the uniform hazard spectrum. The seismic fragility parameters of typical NPP components are modified using the uniform hazard spectrum. The modification factor is used to modify the original fragility parameters. An example uniform hazard spectrum is developed using the available seismic hazard data for the Korean nuclear power plant (NPP) site. This uniform hazard spectrum is used for the modification of fragility parameters.

• Proceedings of the KSME Conference
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• 대한기계학회 2008년도 추계학술대회A
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• pp.150-154
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• 2008

In this research, stress components and principal stresses of O-ring under internal pressure and under uniform squeeze rate were obtained from the stress freezing method of photoelastic experiment and photoelastic experimental Hybrid method for 3-dimensional problems. The obtaining processes of those were introduced. It was certified that the processes of those are effective for the 3-dimensional stress analysis of structures. Stress freezing method, the obtaining processes of those and photoelastic experimental hybrid method were effectively applied to the stress analysis of O-ring made from rubber that under uniform deformation and internal pressure. Stress components and principal stress of Oring under uniform squeeze rate and under internal pressure were analyzed.

• ETRI Journal
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• 제31권6호
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• pp.778-783
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• 2009

To fabricate uniform and reliable thin gold stripes that provide low-loss optical waveguides, we developed a novel liftoff process placing an additional $SiN_x$ layer under conventional photoresists. By patterning a photoresist and over-etching the $SiN_x$, the photoresist patterns become free-standing structures on a lower-cladding. This leads to uniform metal stripes with good reproducibility and effectively removes parasitic structures on the edge of the metal stripe in the image reversal photolithography process. By applying the newly developed process to polymer-based gold stripe waveguide fabrication, we improved the propagation losses about two times compared with that incurred by the conventional image-reversal process.

• Journal of the Korea Society of Computer and Information
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• 제18권9호
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• pp.189-199
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• 2013

This study was conducted to identify the effect of a flight attendant's uniform quality on uniform satisfaction and on selecting an airline. To do that, uniform components were first classified into three factors esthetics, functionality, and symbolization. Then the differences of respondents'perception were tested according to the demographics of respondents. Finally the causal relationships among three uniform components, uniform satisfaction and select airline were examined. For the empirical study, the questionnaire data were collected from college and university student studying cabin crew service. The result of this study showed that the perceptions of students who study cabin crew service were significant on according some demographics information, esthetics, functionality and symbolization factors affecting uniform satisfaction, which had the positive effect on selecting an airline. These results suggested practical implications for cabin crew's uniform. These result include important managerial implications for the airlines. Also there was some limitation on a hypothesis of study and the further study were needed.

• Journal of computational fluids engineering
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• 제22권1호
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• pp.88-94
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• 2017

The IR signal entering into a sensor is composed of the following components: the self-emitted component directly from the object surface, the reflected components of the solar and sky irradiance at the object surface, and the scattered component by the atmosphere without reference to any object surfaces. The self-emitted and reflected components from the object can be lowered by the atmospheric layer between the object and the IR sensor. The principle factors influencing the atmospheric transmittance are the air temperature, the relative humidity and the observation distance. Previous studies on IR signal transmission through the atmosphere are focused on uniform atmospheric conditions and the non-uniform nature of the atmosphere was not properly treated in modeling. In this study, we use the local atmospheric transmittance to simulate the non-uniform atmosphere in analyzing the IR signal from the object surface. The results show that the nonuniform analysis of the atmosphere becomes more important as the wavelength of IR signal increases.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 한국퍼지및지능시스템학회 1998년도 The Third Asian Fuzzy Systems Symposium
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• pp.731-739
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• 1998

The probabilistic relaxation(PR) scheme based on the conditional probability and probability space partition has the important property that when its compatibility coefficient matrix (CCM) has uniform components it can classify m-dimensional probabilistic distribution vectors into different classes. When consistency or inconsistency measures have been defined, the properties of PRs are completely determined by the compatibility coefficients among labels of labeled objects and influence weight among labeled objects. In this paper we study the properties of PR in which both compatibility coefficients and influence weights are uniform, and then a learning rule for such PR system is derived. Experiments have been performed to verify the effectiveness of the learning rule.

• Structural Engineering and Mechanics
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• 제65권5호
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• pp.633-644
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• 2018

This paper presents the results of an assessment of the seismic fragility of a long, curved multi-frame bridge under multi-support earthquake excitations. To achieve this aim, the numerical model of columns retrofitted with elliptical steel jackets was developed and validated using existing experimental results. A detailed nonlinear numerical model of the bridge that can capture the inelastic response of various components was then created. Using nonlinear time-history analyses for a set of stochastically generated spatially variable ground motions, component demands were derived and then convolved with new capacity-based limit state models to obtain seismic fragility curves. The comparison of failure probabilities obtained from uniform and multi-support excitation analyses revealed that the consideration of spatial variability significantly reduced the median value of fragility curves for most components except for the abutments. This observation indicates that the assumption of uniform motions may considerably underestimate seismic demands. Moreover, the spatial correlation of ground motions resulted in reduced dispersion of demand models that consequently decreased the dispersion of fragility curves for all components. Therefore, the spatial variability of ground motions needs to be considered for reliable assessment of the seismic performance of long multi-frame bridge structures.

• Korean Journal of Acupuncture
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• 제28권3호
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• pp.53-62
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• 2011

Objectives : Burn is most common adverse events of moxibustion. Various kinds of components influence on the heat stimulation of commercial indirect moxa, but there are not enough investigation about the status. The purpose of this study is to investigate the 6 components to build a base data that is currently available to build a standard of an indirect moxibustion. Methods : The length and weight, density, thickness of the paper disk, diameter of the paper disk, and diameter in the paper disk hole were measured against 6 kinds of commercial indirect cautery. Results : 1. 'Seoam', 'Kihwang' and 'Taegeuk' shows uniform length than the other brands. 2. 'Dongbang', 'Kihwang' and 'Taegeuk' shows uniform weight than the other brands. 3. 'Dongbang', 'Kihwang' and 'Taegeuk' shows uniform density than the other brands. 4. 'Dongbang' and 'Kihwang' shows uniform thickness than the other brands. 5. 'Seoam', 'Dongbang' and 'Taegeuk' shows uniform diameter of disc hole than the other brands. Conclusions : As a result of investigation, 'Dongbang' and 'Kiwhang' indirect moxibustion was identified as a uniform product. This results are considered as an important base materials of the KS through commercial indirect moxibustion.

• Journal of the Korean Society of Clothing and Textiles
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• 제29권9_10호
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• pp.1265-1273
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• 2005

The objective of this study is to examine the images of the current uniforms and to provide the basic references in designing female flight attendants uniforms. In Incheon International Airlines, 11 of the major airlines with the most passengers along with the highest capacity were chosen and 22 pieces of photographs were collected, two photos coming from each airline companies. The semantic differential scale has been formed by 16 pairs of adjectives. Then, it has conducted a statistical analysis using a SPSS WINDOWS that contains 475 copies of the selected questionnaires (375 of the non-flight attendants, and 100 of the female flight attendants). The following are the results and the conclusion of this study. According to this study, four main components of the uniforms of the female flight attendants were attractiveness, femininity, noticeability, and activity, which have occupied $65.9\%$ of the total variance. It was concluded that attractiveness and femininity were two main factors in perceiving the females' uniforms. According to the results of the uniform image difference, it was shown that Asiana Airline's uniform is the most attractive and Cathay Pacific Airline uniform is the most feminine. The most noticeable uniform was from Singapore airline which included cultural and traditional components of its own national colors. Pants suits of Lufthansa airline and Northwest airline were shown as the most active uniforms. There were significant differences in uniform images according to subjects' gender, age, education, and occupation. Men perceived uniforms more attractive, feminine, and active than women. People over 40 perceived uniforms more attractive, feminine, and active, and the High School graduates perceived uniforms more feminine and active. On occupational basis, Federal workers and Educators perceived uniforms more active on uniforms. Passengers who take planes once a month perceived uniforms more attractive, feminine, and active.