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진동 세관형 히트파이프를 이용한 통신 기기용 마이크로 냉각시스템의 개발
하수정(Soo-jung Ha),배내수(Nae -soo Bae),박철민(Chul-min Park),김종수(Jung-soo Kim) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.4
Rapid development of electronic technology requires small size, high density packaging and high power of<br/> electronic devices. So, in this paper, characteristics on oscillating heat pipe according to operating<br/> conditions(environment temperature, charging ratio of working fluid, inclination) based on experimental study<br/> was investigated. From the experimental results, 25 (environme ℃ nt temperature), R-141b(working<br/> fluid)40%(charging ratio) was best performace at others of inclination angle and The top heating mode of OCHP<br/> performed 80% efficiency of the bottom heating mode.
서울지역 어린이 놀이터 모래에서 개 회충류의 충란 조사
조미영 ( Mi Yeong Jo ),강승원 ( Seung Won Kang ),채희선 ( Hee Sun Chae ),김두환 ( Doo Hwan Kim ),배내수 ( Nae Soo Bae ),기노준 ( No Joon Ki ),이병동 ( Byung Dong Lee ) 한국가축위생학회 2002 韓國家畜衛生學會誌 Vol.25 No.2
To demonstrate the prevalence of Toxocara spp eggs in public playgrounds in Seoul city, sand samples collected from March to November in 2001 were examined. Of 2,600 sand samples from 650 playgrounds surveyed, 41 sands from 39 places(6%) had Toxocara canis eggs. Sand samples in apartment complex were more contaminated(9.7%) with the eggs than in residential area(2.4%). Toxocara canis eggs in sands were found in large number of in the spring but other seasons were less found.