• Journal of the Korean Operations Research and Management Science Society
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• v.20 no.2
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• pp.125-137
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• 1995

This paper provides a locally convergent algorithm and a globally convergent algorithm for a variational inequality problem over convex polyhedral. The algorithm are based on the B (ouligand)-differentiability of the solution of a nonsmooth equation derived from the variational in-equality problem. Convergences of the algorithms are achieved by the results of Pang[3].

• Journal of the Ergonomics Society of Korea
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• v.29 no.4
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• pp.631-637
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• 2010

The aim of affective engineering is to develop a new product by translating customer affections into design factors. Affective data have so far been analyzed using a multivariate statistical analysis, but the affective data do not always have linear features assumed under normal distribution. Rough sets model is an effective method for knowledge discovery under uncertainty, imprecision and fuzziness. Rough sets model is to deal with any type of data regardless of their linearity characteristics. Therefore, this study utilizes rough sets model to extract affective knowledge from affective data. Four types of scent alternatives and four types of sounds were designed and the experiment was performed to look into affective differences in subject's preference on air conditioner. Finally, the purpose of this study also is to extract knowledge from affective data using rough sets model and to figure out the relationships between rough sets based affective engineering method and statistical one. The result of a case study shows that the proposed approach can effectively extract affective knowledge from affective data and is able to discover the relationships between customer affections and design factors. This study also shows similar results between rough sets model and statistical method, but it can be made more valuable by comparing fuzzy theory, neural network and multivariate statistical methods.

• Proceedings of the Safety Management and Science Conference
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• 2005.11a
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• pp.276-280
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• 2005

Industrial processes and operations can not be accomplished independently but are connected with each others through suppliers and customer, and these ideas are fundamental notions of Life Cycle Assessment(LCA). This paper will introduce Life Cycle Assessment(LCA) in environment which is rising, and would like to build environmental management system using approach of Quality Function Deployment(QFD) and Safety Function Deployment(SFD) belonging to the assessment method.

• Journal of Environmental Policy
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• v.5 no.4
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• pp.51-84
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• 2006

The current study suggested plans to maintain excellent natural environment of national parks by prohibiting excessive use and introduced the concept of environment capacity using GIS. This paper is that researches on National Parks in the past studied were mostly on the natural resources, human resources, facilities and visitors as well as standard for management of these issues from individual perspective, this study defined concept of integrated (principle of overlay) carrying capacity. It also estimated environmental ecological conservation value considering ecological conservation and environment-ecological index and estimated visit attraction index based on attraction value of nature and facilities in the parks. And it suggested management index as a management plan for effective analysis and management of carrying capacity. As a result, in case of Mt. Jiri National Park, Grade 5 area requiring inducement occupied 71% while Grade 1 area requiring dispersion occupied 0.1%, which means the necessity of appropriate dispersion in the site. Moreover, this research aims to find a monitoring method, utilizing the concept of ubiquitous, for the continuous systematic monitoring on immense natural resources, facilities, and visitors. The continuable national park management plan was proposed by establishing quantitative, and qualitative objective of the environment capacity from the decision based on GIS public opinions from the gathered information. Through the GIS public opinion system and ubiquitous based technology, I propose the effective management technology method for national park.

• Proceedings of the Korean Society for Quality Management Conference
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• 1998.11a
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• pp.239-250
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• 1998

A method of finding optimal linear restriction on regression parameters in linear model for mixture experiments in the sense of minimizing integrated mean squared error is studied. We use the formulation of optimal restrictions on regression parameters for estimating responses proposed by Park(1981) by transforming mixture components to mathematically independent variables.

• Journal of Korea Multimedia Society
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• v.13 no.11
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• pp.1677-1686
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• 2010

Application contents verifications and operations are essential for using a secure smart phone environment. In the existing smartphone environment, application verification was performed only in the application company and users has direct management application. However these application verification and management practices have been caused by a variety of security vulnerabilities. Therefore, we will analyze the security vulnerabilities in the existing methods and then we propose an application contents management of smart phone using pre-qualification method.

• Management Science and Financial Engineering
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• v.16 no.1
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• pp.47-57
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• 2010

We present a new integer programming formulation and a class of valid inequalities for solving the one-dimensional facility layout problem, which leads to a very efficient solution method for the problem.

• Journal of Korean Society for Quality Management
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• v.19 no.2
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• pp.1-16
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• 1991

Recently, Cook and Weisberg(l989) presented dynamic graphics for regression diagnostics. They suggested animating graphics which could aid to understanding the effects of adding a variable to a model. In this paper, using the Cook and Weisberg's idea of animation, we propose a dynamic graphical method for residuals to display the effects of removing an observation from a model. Based on the information obtained from these animating graphics, it is possible to see the influence of outliers on influencial observations for regression diagnostics.

• Proceedings of the KIEE Conference
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• 1998.07c
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• pp.935-938
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• 1998

This paper presents the method of load management to measure the winter season's load characteristics of distribution pole transformers. The proposed load model constructed used by the quadratic load correlation coefficients. To verify the estimated model, we compared with linear model by calculation results. The results can contribute an improvement of conventional load management method.

• Journal of Korean Society for Quality Management
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• v.14 no.2
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• pp.40-46
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• 1986

The decision maker has the job of torecasting capital investments and operating expenses to aid the decision making in choosing and evaluating present and future alternatives. The estimating function eventually analysis, evaluates and choose the alternatives. The analysis stemmed originally from a preliminary design of some sort, and eventually plans are started to investigate investment possibilites. This study provide the descounted cash flow and the present worth method. Despite any choice of an analytical method, there remains the problem of predicting certain future events. Therefore, these models dealing with optimum plant sizing, equipment replacement, and lease or buy will be discussed.