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고속철도시스템에서 낙뢰로 인해 전차선에 유도되는 서지전압의 해석
이성근(Sung-Gyen Lee),이건아(Kun-A Lee),고광철(Kwang-Cheol Ko) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.5
Lightning is one of hazards affecting the rapid-transit railway system. There are two effects, which are direct lightning surge to electric car line and induced lightning surge. Protection methods for the direct lightning surge are studied with various occasions, however, study of induced lightning surge is insufficient in spite of a large or small effects. In this paper, it is analysed the way that serge voltage is induced to electric car line by lightning strikes. By modeling the propagation process and the coupling phenomenon of electromagnetic wave produced by lightning strikes, it is achieved to make integrative circuit model combined with existing electric car model. The study is conducted into three different waveform of electromagnetic wave produced by lightning; rectangular wave, double exponential distribution wave, triangle wave. It is also simulated that the inducing serge is coupled to electric car line in an arbitrary location. The simulation results in that, when rapidly changing rectangular wave is supplied, maximum power is induced to electric car line.
전력선 모뎀을 이용한 선박엔진 성능분석기의 신호전달방식의 개선
김건우(Kun-Woo Kim),양현숙(Hyun-Suk Yang),임현정(Hyun-Jung Lim),최준길(Jun-Gil Choi),이성근(Sung-Geun Lee),김윤식(Yoon-Sik Kim) 한국마린엔지니어링학회 2005 한국마린엔지니어링학회 학술대회 논문집 Vol.2005 No.-
This paper describes that send some signal from encoder attached to crankshaft of marine-engine to measuring instrument using power line modem(PLM) and display cylinder pressure, rpm and etc. on LCD. Conventional method that sends signal along the long signal line has some inconvenience from too long signal line length caused by huge volume of ship's engine. Power line modem can have short signal line from outlets to measuring instrument. Because it use exist power line for send signals, so it have low installation cost and could have good merits in job sites. Through this experiment, pressure in cylinder, engine rpm and etc. signals through PLM are well recognized at measuring instrument.
김재욱(Jae Wook Kim),이성근(Sung-Kun Lee),최지호(Jiho Choi),김종근(Jong-Kun Kim) 한국유통학회 2003 流通硏究 Vol.7 No.2
본 연구는 최근 급격하게 성장하고 있는 국내 CATV 홈쇼핑 시장의 성공요인을 관계마케팅(relationship marketing) 관점에서 분석하였다. 이를 위해 CATV 홈쇼핑의 특성을 제시한 후, 국내 CATV 홈쇼핑 시장의 현황과 업체들의 관계마케팅 실행전략을 살펴보았다. 구체적으로, 국내 CATV 홈쇼핑 업체들과 관계를 맺고 있는 대상을 크게 최종 소비자, 제조업체, 물류 및 택배업체, SO업체, 그리고 관련 산업으로 분류한 후, 각 파트너들에 대한 관계마케팅 실행전략을 분석하였다. Using a framework of the relational exchanges in relationship marketing, this study analyzed success factors of domestic CATV home shopping market which has rapidly grown recently. In order to carry out this analysis, the current status of domestic CATV home shopping market and the operational strategies of relationship marketing by the concerning enterprises were examined. More specifically, the exchange partners that have exchange relationship with domestic CATV home shopping companies were classified into the end-users, manufacturing companies, logistics and parcel delivery companies, SO companies, and other related industries, and then the operational strategies of relationship marketing for each partner were analyzed.
RF 모듈 방식의 선박용 냉동 컨테이너 원격 감시시스템 개발
양현숙,임현정,김건우,권영괄,김동묵,이성근,Yang, Hyun-Suk,Lim, Hyun-Jung,Kim, Kun-Woo,Kwon, Yeong-Gwal,Kim, Dong-Mook,Lee, Sung-Geun 한국마린엔지니어링학회 2007 한국마린엔지니어링학회지 Vol.31 No.4
This paper describes a development of ship's refer-container remote monitoring system(RRMS). This system consists of Master, repeater with a switched mode power supply(SMPS) and slave terminal. Slave terminal is composed of wireless MODEM and microprocessor part, checks its conditions like temperature. humidity & etc through the interrogate port(IP) of refer-container. and transmits their data to master. Repeater's role is that connect so that signal which is transmitted from Slave Terminal by Master may not receive electric wave interference by container boxes. We verify the effectiveness of proposed system through the experimental works in container yard and ship.
임현정,양현숙,김건우,백영진,김윤식,이성근,Lim, Hyun-Jung,Yang, Hyun-Suk,Kim, Kun-Woo,Baek, Young-Jin,Kim, Yoon-Sik,Lee, Sung-Geun 한국마린엔지니어링학회 2007 한국마린엔지니어링학회지 Vol.31 No.2
This paper describes the implementation of control and monitoring system of ship's lamps at local area using power line communication method, power line modem(PLM). We design modem, microprocessor interface for electric power control by frequency control and analog to digital signal conversion, lamp device. PLM communication is very economical using existing electric power line unlike RS-232, RS-485 communications. We verify and confirm by experimental work that control and monitor lamp system for ship by an PLM communication.