• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.12 no.2
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• pp.85-90
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• 1998

This paper describes the breakdown characteristics of GIS by the free conducting particles under alternating voltage. If the conducting particles are present within the GIS, they can cause decrease in breakdown voltages. Various materials and sizes of free conducting particles were used to study the liftoff electric field and breakdown voltage. The measured lift-off electric fields were compared with the calculated ones for copper, steel and aluminium wire-type conducting particles. As an experimental result, it is shown that the breakdown voltages of the GIS chamber with conducting particles were lower than those without conducting particles, and were markedly dependent on the particle material and the particle sizes. Free conducting particles are important factor in particle-triggered breakdown of the GIS.he GIS.

• The Journal of the Korea Contents Association
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• v.9 no.12
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• pp.235-244
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• 2009

The object of this research is to analyze the impact of the four dimensions of on-line game attributes, challenge, social interaction, entertainment and actuality, on customer satisfaction and loyalty. At the same time, mediating effects of switching barriers, such as switching cost and attractiveness of alternatives on the relationships between customer satisfaction and customer loyalty are also analyzed. The results showed that the challenge, social interaction, entertainment had significant effects on customer satisfaction. Customer satisfaction also effected customer loyalty. Another important result is that switching cost and attractiveness of alternatives played an intermediating role between customer satisfaction and customer loyalty.

• Proceedings of the Korea Contents Association Conference
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• 2009.05a
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• pp.341-347
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• 2009

In this research, the object is to analysis the impact of the four dimensions of on-line game attributes, challenge, social interaction, entertainment and actuality, on customer satisfaction and loyalty. At the same time as mediating factors of relationship between customer satisfaction and customer loyalty, switching barriers, such as switching cost and attractiveness of alternatives are also analyzed. The results show that the challenge, social interaction, entertainment have significant effect on customer satisfaction. Customer satisfaction also effects customer loyalty. Another important result is, switching cost and attractiveness of alternatives take an intermediation role between customer satisfaction and customer loyalty.

• Proceedings of the Korea Inteligent Information System Society Conference
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• 2002.11a
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• pp.411-422
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• 2002

비교구매는 e-Marketplace의 매출에 큰 영향력을 미치고 있으나 운영 수익은 대부분 광고에 의존한다. 하지만 인터넷 광고의 수익률은 열악한 상태이며, 종량제 기반 광고 방법의 확대로 소비자에게 덜 알려진 판매자의 제품 정보 노출 기회는 더욱 줄어들고 있다. 따라서 비교구매 사업자의 광고 수익을 높이면서 판매자 입장에서는 예산 및 제약 조건 범위 내에서 광고 노출의 효율성을 최적화하는 방법 및 시스템에 대한 연구가 필요하다. 본 연구에서는 비교도전을 이용한 비교광고 방법을 제안하고 그 실행 방법으로 판매자의 비교 도전 계획 모델을 사용하는 e-Marketplace기반 비교구매 사업자의 비교광고 시스템을 설계하고 구현하였다. 비교도전 계획 모델은 경쟁사(Competitor), 경쟁 제품(Product) 그리고 제품의 사양(Specification)에 대한 수준별 도전 정책을 적용하며, 양 사의 제품 사양 속성값들 간의 기능적 거리를 양적 수치화하여 판매자 제품이 경쟁사 제품에 가장 유사하지만 우세한(Similar but Superior) 쌍들에 대한 비교광고 포트폴리오를 구성함을 목적으로 한다. 비교도전 계획 시스템은 비교가치의 생성과 최적화의 단계로 이뤄진다 주요 5개 PC제조사의 데스크탑 제품자료를 사용하여 프로토타입을 구축하였으며, 타 비교광고 방법과 대비한 성능 평가를 수행하였다. 또한 e-Marketplace기반 비교구매 사업자의 비교도전에 의한 비교광고 표시 방법을 예시하였다.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.11 no.3
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• pp.111-120
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• 2016

This study was conducted to research the effect of college student's creativity and self-efficacy on entrepreneurial intention. The creativity was comprised of fluency, originality, flexibility, logicality, risk-taking, and openness. The data was collected through a survey using college students as objects and 265 copies of the questionnaires were eventually. The study result was as follows. First, originality and risk-taking of the creativity appeared to have a positive effect (+) on entrepreneurial intention. On the other hand, fluency, flexibility, logicality and openness of the creativity appeared to have no effect on entrepreneurial intention. Secondly, self-efficacy appeared to have a positive effect (+) on entrepreneurial intention. The academic implications of this study were: first, under the situation of which the studies about creativity on entrepreneurship are rather inadequate, this study is carried out with respect to influential factor of creativity in regard to entrepreneurial intention, second, obtained the result that the effect of which creativity has on entrepreneurial intention varied for each characteristic of creativity. In practise, this study implies that entrepreneurial intention can be increased through practical and systematic entrepreneurship education designed for increasing creativity and self-efficacy.

• The Journal of the Korea Contents Association
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• v.11 no.5
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• pp.291-301
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• 2011

This research describes the comparison broker's role and its effectiveness measurement framework of comparison shopping. We verified seller-led comparison challenge method provide comparison information of products to buyers more efficiently. Buyer's satisfaction of purchase (S) can be defined as an interactive function between seller's competitiveness vector (P) of products that supplied to the market, and buyer's informed level vector (B) of products that is known from a lot of sources. Then the buyer's informed level can be changed through the information analysis among products by transformation process using comparison matrix (C). So the role of comparison shopping is to construct a comparison matrix and to serve it to the buyers, and to change the buyer's informed level. The changed informed level influences a buyer's satisfaction, that improved satisfaction of purchase is defined as the effectiveness of comparison shopping. As a perfect construction and usage of comparison matrix is impossible, a more efficient method for improving the comparison effectiveness is the comparison challenge. This research shows that comparison shopping makes 9.32% and comparison challenge makes 19.11% enhancement of comparison effectiveness through television market data experiments.

• Journal of the Korean Society for Precision Engineering
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• v.17 no.6
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• pp.96-102
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• 2000

The finishing process for dies and molds is an important process because it has influence on final quality of products. And it is difficult to automatize finishing process so that the process has depended on expert's skill until now. However, recently a study on development of die automatic finishing machine has been progressed, and actually this machine is applied to fabrication of die. But the research about tooling system is not enough and finishing tool must have high machining efficiency and adaptability of curved surface. So, this study investigated the application of conductive elastic tool which is composed of metal-resin bonded pellet and elastic backing material. The metal-resin bonded pellet is used to finish the surface by conventional mechanical grinding or electro-chemial grinding method. And elastic backing material is used to follow the curved surface. So conductive elastic tool has long lifetime, uniform removal rate and adaptability of curved surface.

• Journal of computational fluids engineering
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• v.14 no.3
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• pp.123-130
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• 2009

Hydromagnetic flow in a confined enclosure under a uniform magnetic field is studied numerically. The thermally active side walls of the enclosure are kept at hot and cold temperatures specified, while the top and bottom walls are insulated. The coupled momentum and energy equations associating with the electromagnetic retarding force as well as the buoyancy force terms are solved by an iterative procedure using the SIMPLER algorithm based on control volume approach. The changes in the flow and thermal field based on the orientation of an external magnetic field, which varies from 0 to $2{\pi}$ radians, are investigated. Resulting heat transfer characteristics are examined too.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.23 no.6
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• pp.713-721
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• 1999

A composite plastic, where long metallic fibers are used as filling materials, is transformed from nonconducting to conducting medium as the volume fraction of filling metallic fibers is increased from zero : such drastic change in property is called the percolation. It is desired both for practical and theoretical purposes to understand the physics underlying the percolation and to estimate the percolation threshold that is defined by the minimum volume fraction of the metallic fibers for which the percolation occurs. In this study, percolation thresholds are calculated by Monte Carlo Computer simulation. Both lattice and continuum spaces are considered and detailed microstructures of metallic fibers are modelled as rigid and flexible bodies for both model spaces. Simulations are carried out for wide range of aspect ratios and discussions are given.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.2
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• pp.347-351
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• 2008

Primary charging roller rotated with contacting surface of OPC drum and take charge OPC drum. Owing to this reason, primary charging roller made by elasticity substance with electric conduction. Properties of charging and image changed by class of coating, method of coating and environment. This study developed about coating method to make print image of good quality.