• Title/Summary/Keyword: Custom service ground

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Lightning Surges Transferred to Low-voltage AC Power Lines through Distribution Transformers (배전용 변압기를 통하여 저압 전원선으로 전파되는 뇌서지)

  • 이복희;이동문;이수봉
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.17 no.4
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    • pp.94-99
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    • 2003
  • A strong need to improve the quality of electric power is increased because of increasing use of the sensitive and small-sized electronic devices. The transient overvoltages on low-voltage AC power distribution systems are induced by direct or indirect lightning return strokes, and they can cause damage and/or malfunction of the utility systems for home automation, office automation and factory automation as well as medical equipment. The behaviors of lightning overvoltages transferred through the transformer to the low voltage AC power distribution systems were experimentally investigated using a Marx generator. The surge voltages in low-voltage ac power systems are rarely limited by the application of the surge arrester to the primary side of distribution transformer and a custom service ground.

Design and Implementation of an Automatic Design Edit System by Lisp Language

  • Park, Hong-Seok;Lee, Chun-Keun;Yeo, Jeong-Mo
    • Journal of Korea Multimedia Society
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    • v.6 no.4
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    • pp.714-722
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    • 2003
  • Men's clothing has been recently giving higher market shares to the ready-made clothes rather than the custom-tailored clothes. With many active studies on the human body and design, the ready-made clothes win popularity due to their rapid repairing, various design, and cheap prices, though they are not perfect suitable for some people. Therefore the ready-made has a weak point unable to consider all of the individual physical characteristics. However the custom-tailored clothes ate able to make clothing perfectly suitable lot their customers, though they require longer time-taking and expensive costs. In this context, this paper is design and implementation an automatic design edit system to provide a rapid and cheap service for customers on the ground of the custom-tailored clothes. In other words, this paper intended to use computer systems lot rapidly and precisely providing design dependent on the individual physical characteristics including a distorted bodies, types of the leg, and a height of the shoulder. To do so, the paper using not only studies on the human body and the custom-tailored clothes but also technical know-hows planned design for each individual body by LISP language and automatically process the design through CAD system. Consequently, the rapid and precise processing has reduced inventories and production costs, leading to supplying high quality clothes at lower prices.

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Propagation of Lightning Surges on Power AC Lines through Distribution Transformers (배전용 변압기를 통한 저압전원선으로의 뇌서지 전파)

  • Lee, Bok-Hee;Lee, Su-Bong;Lee, Dong-Moon
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2002.11a
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    • pp.468-471
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    • 2002
  • A strong need to improve the quality of electric power is increased because of increasing use of the sensitive and small-sized electronic devices. The surges on the low-voltage ac power lines are induced by nearby lightning return strokes, and the facilities for HA, OA, FA, ME as well as computer are easily damaged by high-voltage transients. The behaviors of lightning surge characteristics transferred from the primary winding to the secondary winding in distribution transformers using a Marx generator were experimentally investigated. The transfer characteristics of lightning surge associated with a custom service ground of secondary side were also examined.

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Analysis of direct interactive motion picture electronic commerce technology (동영상기반 양방향 직접 전자상거래(DIMPEC) 기술 분석)

  • Min, Byoung-won;Kim, Woo-sung;Oh, Yong-sun
    • Proceedings of the Korea Contents Association Conference
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    • 2008.05a
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    • pp.494-497
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    • 2008
  • DIMPEC, Direct Interactive Motion Picture Electronic Commerce technique is not only that gain additional detail information on the entry properties and actor custom by seeing and hearing VOD and TV drama with internet but also source technology which can buy product using electronic commerce. Also, this is enable to construct in variety platform environment like internet, PDA, MOBILE, Settop box, and this is a technology where competition is very high due to application is possible to satellite DMB, and DMB for ground which is high technology IT. DIMPEC is expected that next generation business model will be formed by combining to user participation, consumption magnification of mobile contents, advancement and intelligence of internet service which is next generation internet business model which combines this technique.

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