• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2000.10a
• /
• pp.167-170
• /
• 2000

This paper is concerned with development of a performance evaluation model for material handling system in cellular manufacturing system based on multi-attributes analysis method. We used the AHP(analytic hierarchy process) and fuzzy set ranking methodologies to overcome the special decision problems; those of multi -objective, multi-criterion, and multi-attributes. We proposed a 3-step approaches and we developed a systemic and practical computer program to solve the problems in the proposed methods. Computational experiments are then performed to cellular manufacturing system and show the effectiveness of the proposed model.

• The Korean Journal of Ecology
• /
• v.20 no.5
• /
• pp.303-313
• /
• 1997

A new evaluation technique, i.e. multicriterion matrix technique, on the vegetation assessment was proposed and compared with several techniques having been previously used in the environmental impact assessment. Four criterias and 10 subcriterias were selected for two evaluation indices such as vegetation naturalness value and vegetation class. These criterias were characterized by syntaxonomical informations of hemeroby concept and potential vegetation, hierarchical system between criterias, and ordinal scale of vegetation naturalness valuse. Vegetation naturalness values were classified into 11 ordinal levels and condensed to five vegetation classes for facilitating practical use. In the example study two sites were compared by using two indices. This technique could have useful applications for ssessment of regional vegetation. A vegetation map of naturalness described by combination of two indices was proposed in order to illustrate regional vegetation naturalness.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• v.9 no.5
• /
• pp.64-70
• /
• 1995

This paper presents a practical approach to evaluate the reliability indices of electric distribution systems. The use of reliability evaluation is placed with framework of distribution system planning and operation. In this paper, the reliability model is based on an analytical method, connecting component failure to load point outage in each section. Five cases are reported in the paper to study the effect of varying failure rates and repair times on real distribution systems. Simulations are preformed by the developed reliability evaluation program.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 1995.10a
• /
• pp.1005-1008
• /
• 1995

The spindle is a very important part of machine tool. The evaluation of spindle motion is required for improving the performance of machine tools. The evaluation tools have been developed for precison spindle by the reversal technique, and 3D error map motion of spindle is proposed. This technique makes us understand the total movement of spindle more easily. The proposed technique has been successfully applied to practical machine tools, giving high potentials for the spindle performance measurement.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
• /
• 2014.04a
• /
• pp.201-204
• /
• 2014

Recent year, the vibration induced fatigue and noise of piping work become critical in offshore hydrocarbon production facilities with increasing requests by major oil company. In this paper, the risk base piping vibration induced fatigue assessment of NORSOK L-002 standard and UK Energy Institute guideline have been introduced with real project application practice. Also the piping breakout noise evaluation by flow restriction devices of compressible and in-compressible flow are reviewed with its practical application on real project.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.56 no.10
• /
• pp.1852-1858
• /
• 2007

To Increase availability and to enhance the safety, the modernization of Instrumentation & Control (I&C) systems is considered. The extended use of the digital technology lets nuclear power plants(NPPs) to replace their old analog systems with some proven digital systems. To adapt digital equipment to plants effectively and systematically, however, there must be an essential prerequisite, which is to evaluate current I&C equipment. This paper shows a practical methodology to evaluate the current status and reliability of I&C systems of NPPs using Reliability Evaluation System(RES) before performing upgrades or replacements for systems. The proposed method was applied to KORI Unit 2. The proposed method shows the current status of operating I&C systems effectively for upgrading I&C systems.

• Proceedings of the KIEE Conference
• /
• 2006.07a
• /
• pp.490-491
• /
• 2006

Based on the real field test of 22.9kV HTS cable, which is installed in Gochang Power Testing Center located in Chonbuk Province, the standard for the performance test and the quality evaluation have been established. This work will be applied to the development of HTS cable and the purchase process as a practical material. In particular, new items for the cable evaluation such as the measurement of critical current and the heat loss, which was not dealt with in conventional cable, are specified in detail.

• Communications for Statistical Applications and Methods
• /
• v.23 no.4
• /
• pp.343-353
• /
• 2016

In doubly-censored data, an originating event time and a terminating event time are interval-censored. In certain analyses of such data, a researcher might be interested in the elapsed time between the originating and terminating events as well as regression modeling with risk factors. Therefore, in this study, we introduce a model evaluation method to measure the predictive ability of a model based on negative predictive values. We use a semiparametric estimate of the predictive accuracy to provide a simple and flexible method for model evaluation of doubly-censored survival outcomes. Additionally, we used simulation studies and tested data from a prostate cancer trial to illustrate the practical advantages of our approach. We believe that this method could be widely used to build prediction models or nomograms.

• Journal of the Korea Safety Management & Science
• /
• v.17 no.1
• /
• pp.215-224
• /
• 2015

International organization and airport operator have issued a guidance manual with regard to the sustainability specialized in airport by adopting environment friendly rating system and developing a variety of sustainable practices. The structure of framework is essential to the development of practical and effective sustainability guideline of airport. Evaluation criteria and method for airport sustainability properly designed is necessary for the assurance of the level of sustainability. In this study, evaluation criteria and method proper to airport after structuring of framework for airport sustainability will be suggested by reviewing a variety of reference documents issued from foreign and domestic organization.

• The International Journal of Costume Culture
• /
• v.13 no.2
• /
• pp.67-81
• /
• 2010

This study is a basic research to develop kit and program for fashion psychotherapy, a new genre of therapy. Symptom checklist, self-esteem evaluation, interpersonal relationship problem evaluation and fashion preference evaluation were conducted on 159 college students in Seoul. The results were analyzed with t-test and one-way ANOVA. The result showed that first, warm color preference was significantly high in interpersonal problem among psychological problems. Second, smooth material preference was significantly high in paranoia among psychological problems. Third, differences in design preferences by psychological problems were not significant. Fourth, differences in design preferences between abnormal range and normal range of psychological problems were significant in line shape, with depression abnormal group showing significantly high straight line preference. Additionally, complex shape preference was significant in complexity in somatization and phobia abnormal groups. This study can be utilized in kit development for a new field, fashion psychotherapy. This study is significant as practical basic data in constructing fashion psychotherapy program.