• Journal of Korean Institute of Industrial Engineers
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• v.3 no.2
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• pp.83-91
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• 1977

This paper investigates the reliability characteristics of a system consisting of a unit operating on-line and backed by n spares among which m units are kept "warm" as standbys ready to go on-line. The on-line unit has an arbitrary lifetime distribution, while the warm standbys have exponential failure time distributions. The Failed units are repaired and brought back to service. The cold spares do not fail while in storage. Solution of this extremely complicated queuing problem using a "renewal counting" approach is presented and extended to the situation where the warming-up takes non-negligible time. Finally, an approach to the economic system management is discussed, considering the long-run availability, cost of keeping spares and repair facility, and the associated cost of restarting the system, after a system failure. The model presented in this paper will have many applications including the determination of the spares inventory and the number of field spares to be "carried".

• Journal of the Korea Furniture Society
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• v.28 no.4
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• pp.286-293
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• 2017

The dormitory, a common facility for college students, is being deployed and used in terms of both efficient use of space for students and comfortable living. Among them, I was in charge of the rest of the students in the dormitory and investigated and analyzed the dormitory bed which occupied the largest portion of the indoor space. The purpose of this study is to investigate the present condition of bed arrangement and the use condition of the university dormitory in Seoul, and finally to design the bed design which is practical and maximize storage for the students in the dormitory space that accommodates a large number of people, Respectively.

• Korean Institute of Interior Design Journal
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• no.38
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• pp.116-124
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• 2003

The purpose of this study was provide basic data for homemakers' housing notion according to unit size in apartment. This study was conducted by questionnaires that concerning about middle class homemakers whom they lived in Bundang. The results of this study were as follows; 1) In research on the homemakers' general quality, 20pyung unit size was alike 30pyung unit size and 40pyung unit size was similar to 50pyung unit size. 2) Homemakers' perception according to unit size in apartment was various; (a) 20pyungㆍ30pyung unit size-effective household space for husbands' participation, more sports facilities, parking lot space etc. (b) 40pyungㆍ50pyung unit size-homemakers' individual room, ordering and variable unit plan etc. 3) In research on the homemakers' needs, each of unit size was analogous to storage, common facility, new design and new housing form etc.

• Korean Management Science Review
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• v.12 no.1
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• pp.35-50
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• 1995

The material handling equipment selection, that is a key task in the material handling system design, is a complex, difficult task, and requires a massive technical knowledge and systematic analysis. It is also invaluable to justify the selected equipment model by the performance evaluation before its actual implementation. This paper presents an intelligent knowledge-based expert system called "IMESE" created by author, for the selection and evaluation of material handling equipment model suitable for movement and storage of materials in a manufacturing facility. The IMESE was constructed by using the tools of VP-Expert expert system shell, DBASEIII plus, FORTRAN 77, and SLAMII simulation language. The whole process of IMESE is executed under VP-Expert expert system environment.vironment.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1995.04a
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• pp.79-90
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• 1995

The material handling equipment selection, that is a key task in the material handling system design, is a complex, difficult task, and requires a massive technical knowledge and systematic analysis. It is invaluable to justify the selected equipment model by the performance evaluation before its actual implementation. This paper presents an intelligent knowledge-based expert system called "IMESE" created by authors, for the selection and evaluation of material handling equipment model suitable for movement and storage of materials in a manufacturing facility. The IMESE is consisted of four modules: a knowledge base to select an appropriate equipment type, a multiple criteria decision making procedure to choose the most favorable commercial model of the selected equipment type, a database to store the list of commercial models of equipment types with their specifications, and simulators to evaluate the performance of the equipment model. The whole process of IMESE is executed under VP-Expert expert system environment.vironment.

• Journal of the Korean Professional Engineers Association
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• v.37 no.6
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• pp.29-36
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• 2004

Human being have destroyed environment through rapid industrialization, so that the world is increasingly faced with golbal environmental problem such as destruction of ozone layer, global warming., acid rain, decertification and we are heading toward impending disaster of the earth. Especially, recent environmental pollution of China from rapid economic development threatens neighboring Korea and Japan. Regional development are necessary for promotion of national prosperity, but theses regional developments must have brought about environmental and preservation. Actually there are so many conflict cases; Saemankum reclamation project, construction of nuclear waste storage facility, dam construction of China etc. Here, harmony and balance between development and preservation are needed to solve these great crux. Under theses condition, the concept of ESSD(Environmentally Sound and Sustainable Development) emerged as a global issue. And staring point to solve present environmental problems is to perceive the truth that we have inherited only one earth and hence owe a debt to preserve its environment for the benefit of the future generations.

• Proceedings of the Computational Structural Engineering Institute Conference
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• 2004.10a
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• pp.93-100
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• 2004

In this study, a support system is developed for the design of facility structures. This system is called Expert System for Design Optimization of Industrial Plant Structures (EDIPS). Based on the strength assessment of steel-plate structures such as ships and off-shore structures, a detailed load calculation method is developed utilizing the database of various plant structures. The method, developed in support of design and for the assessment of strength, constitutes a part of EDIPS. By providing relevant and consistent design data and procedures to engineers, EDIPS is expected to be useful as an important development tool for maritime distribution system that is used to control the transportation by ships and loading unloading, and storage of cargo.

• The Journal of the Korea institute of electronic communication sciences
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• v.11 no.1
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• pp.37-44
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• 2016

In this paper, to provide a method for providing a network separation subscriber's facilities. How to provide this subscriber's facilities include phase generating authorization key in server, saving activation file in portable data medium included server's authorization key, executing saved activation file in client's portable storage and providing virtual machine by result client's execute file. In case of moving work, the virtual subscriver's facility can provide for a business traveler.

• Journal of the Korean housing association
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• v.14 no.1
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• pp.1-10
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• 2003

The purpose of this study is to analyze patterns of space use and housing preferences to be used in the housing plan for students. Data was collected through questionnaire surveys from local university students living apart from their family. We collected 272 samples and analyzed them using SPSSwin program. The results are as follows; 1) The average hours of staying at the housing for student are 5 hours and 30 minutes(except sleeping time). Most of the time was used for ‘hobby’ and ‘study\ulcorner computer works’. The most of the students had ‘a meal per day’ at their housing. 2) The most preferred housing type by the students is ‘studio apartment’ and the next preferred is ‘apartment’. The highly demanded facility is ‘laundry’ and the next comes ‘kitchen’. 3) Those who spend more time in their housing than average show higher demand in ‘kitchen’ and ‘balcony’. Those who spend less time in their housing show higher demand in ‘storage’.

• Proceedings of the KIEE Conference
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• 1992.07a
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• pp.27-30
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• 1992

In this paper, we report the research activities of the technical committee of Electric Vehicle (EV). Recently, environmental pollution has become a world-wide problem. As a practical step to solve this problem, it is sincerely hoped that EVs will become widely used. Here in, we wish to describe an Electric Vehicle research facility with the objectives of developing motor propulsion technology, energy storage technology, control system, battery charging systems, and etc.