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열처리 효과에 따른 Zn0.7Mn0.3O 박막의 자기 특성 연구
김영미(Y. M. Kim),김유경(Y. Kim),윤명근(M. Yoon),박찬수(C. S. Park),이연숙(Y. S. Lee),전미선(M. S. Jeon),박일우(I.-W. Park),박용주(Y. J. Park),유종훈(Jong H. Lyou),김상수(S. S. Kim) 한국자기학회 2003 韓國磁氣學會誌 Vol.13 No.4
We report on the annealing effect and ferromagnetic characteristics of Zn_(0.7)Mn_(0.3)O film prepared by sol-gel method on the silicon (100) substrate using field emission-scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), X-ray diffractometry (XRD) and superconducting quantum interference device (SQUID) magnetometry. Magnetic measurements show that Zn_(0.7)Mn_(0.3)O films exhibit ferromagnetism at 5 K revealing the coercive field of ~110 Oe for as grown sample and 360, 1035 Oe for samples annealed at 700, 800 ℃, respectively. Our experimental evidence suggests that ferromagnetic precipitates of a manganese oxide may be responsible for the observed ferromagnetic behaviors of the film.
박찬수,하옥남 朝鮮大學校 機械技術硏究所 2003 機械技術硏究 Vol.6 No.2
Fin-tube type(Fin-type) heat exchanger has been tested in order to replace the heat exchanger of parallel flow type(P.F-type) which is now used in automobile air conditioner system. The following conclusions are drawn by the comparison of the characteristics of the heat exchangers. Evaporator and condenser capacities and COPS were varied as the compressor speed, outdoor air temperature and air flow rate changed, which much influenced the characteristics of the air conditioning system. Evaporator and condenser capacities increased with increasing compressor speed and outdoor air temperature. Evaporator and condenser pressures of Fin-type decreased by 7% and 5% respectively compared with those of P.F-type. The COP of Fin-type decreased with increasing outdoor air temperature and the compressor speed. The COP of P.F-type decreased by 14% compared with t h a t of Fin-type.
Gentamicin으로 치유한 녹농균수막염(Pseudomonas meningitis)의 1예
김창현,차상복,박찬수 대한감염학회 1971 감염 Vol.3 No.1
An experience was gained on the use of Gentamicin intrathecally for Pseudomonas meningitis. 30 year old undernourished house-wife who had a history of gynecological operation under the spinal anesthesia a week before admission to this hospital, was treated successfully with medication of gentamicin, 1mg daily intrathecally, and 2-4mg/kg per day intramusculary in divided doses.(table 1) No toxic effects were seen in this case.
Thermosyphon의 가열량 증가시의 온도특성에 관한 연구
하옥남,박찬수,남동현 조선대학교 에너지.자원신기술연구소 2003 에너지·자원신기술연구소 논문지 Vol.25 No.1
The research is focused on the stability in which the incoming heat to the evaporator is in creased and transfer capability which is required in designing of a system. First, in case the incoming heat to the thermosyphon evaporator is increased and the quantity of operational fluid is less than the requirement, the surface temperature of evaporator increases, which can make the system abnormal and cause damage to the system to be out of order. Therefore, the aim of this research is to study the characteristics in which the heating amount of the thermosyphon is increased.