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김화종(H. J Kim),김현주(H. J. Kim),김성용(S. Y. Kim),송재혁(J. H. Song),한지훈(J. H. Han),이호림(H. L. Lee),김덕환(D. H. Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
현재 전세계적으로 170㎸급 이하의 초고압 지중케이블 접속함으로 기존의 현장몰드방식의 TMJ(Tape Molded Joint)와 부풍조립망식의 PJ(Prefabricated Joint)보다 조립시간이 짧고 작업자의 숙련도가 높지 않아 경제적이며, 유지보수에 장점을 가진 고무몰드 접속함(PMJ)이 채용되고 있으며, 이러한 추세는 적용 전압급이 점차 상승하면서 230㎸급까지 그 비중이 늘어나고 있는 경향을 보이고 있다. 당사에서는 이러한 추세에 발맞추어 154㎸급 고 무몰드접속함의 개발 당시의 Silicone의 기초물성시험 DATA 획득, 고무볼드 UNIT 및 금형 설계 기술 확립과 접속 공법 개발의 경험 을 바탕으로 230㎸급 고무몰드접속함의 개발에 성공하였다.
한지훈,김동주,전중환,장홍희,구자민,김은정,이효종,연성찬 한국동물자원과학회 2004 한국축산학회지 Vol.46 No.1
This study was performed to investigate the behavioral characteristics of Hanwoo(Bos taurus coreanae) cows and their calves. Four cows and their calves were placed in pens. The behaviors of each cow and calf were recorded using a time lapse VCR from 07:00 h to 18:00 h for 6 days and were analyzed using the scan point sampling method. The cow's behaviors in order of frequency were LD(lying down, 25%), ST(standing, 23%), EA(eating, 13%), LR(lying down rumination, 10%) and SR(standing rumination, 7%). The cows spent less than 3% of their time PG(pairwise grooming) and SF(sniffing). The calves mainly showed LD(52%), ST(28%), LF(lying flat, 4%), EA(3%) and WA(walking, 3%). The calves spent less than 2% of their time SF(sniffing) and SUK(sucking). The behavioral patterns of cows and calves at 07:00 h, 12:00 h and 18:00 h were different, especially in ST and LD.
전중환,김동주,한지훈,연성찬,장홍희 한국동물자원과학회 2003 한국축산학회지 Vol.45 No.6
We investigated postpartum behaviors of sows and their litters. The aim of this study was to determine the behavioral recovery of sows and behavioral development of their piglets postpartum. Five multiparous sows(Landrace × Yorkshire) and their litters were studied over a period of 5 days postpartum. The litter size varied from 8 to 13 with a mean of 11.2 piglets. The behaviors of sows and their piglets were recorded using five CCD cameras, a multiplexer and a time lapsed VCR. The videotapes were scanned every 2 min to obtain an instantaneous behavioral sample. In the behaviors of sows, ?Lying ventrally? increased from 1h postpartum to 26g postpartum, then decreased gradually, and stabilized after 80h postpartum. ?Lying ventrally? decreased from 1h postpartum to 26h postpartum and stabilized after 80h postpartum. ?Standing, drinking and feeding? increased from 1h postpartum to 23h postpartum, then decreased gradually, and increased again from 60h postpartum. ?Sitting? increased from 1h postpartum to 46h postpartum and then decreased. In the behaviors of piglets, ?Lying? increased rapidly from 1h postpartum to 45h postpartum, and then was maintained at an almost constant level. ?Massaging and Suckling? decreased rapidly from 1h postpartum to 36g postpartum, and then was maintained at an almost constant level. ?Walking? increased from 1h postpartum to 21h postpartum, then decreased gradually. These results suggest that the behavioral recovery of the sow is almost completed at 80h postpartum and that the behavioral development of the piglet is almost completed at 45h postpartum.