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Guelph Permeameter를 이용한 불포화층 토양의 토양수분특성곡선
정재훈 ( Jeong Jae-hoon ),박승기 ( Park Seoung-ki ),정해원 ( Jeong Haw-won ),윤정환 ( Yoon Jung-hwan ) 한국농공학회 2008 한국농공학회 학술대회초록집 Vol.2008 No.-
The research which sees about soil moisture characteristic curve. Homogeneous light made do artificially and test soil where comes to make and to use Guelph Permeameter respectively from the soil of fact basin field saturated hydraulic conductivity test. Field saturated hydraulic conductivity where follows in change of the result and soil possibility quantity and from soil metric pro-potential interrelations made soil moisture characteristic curve. field saturated the relationship of hydraulic conductivity and soil metric pro-potential when the soil possibility quantity increased initially, was visible the quality which decreases respectively in exponential curve form. Applies like this soil moisture characteristic curve and examines closely surface runoff and usefully, the type and a physical nature of soil, in groundwater recharge various analyses judges with the fact that will be able to apply.
윤성운(Sungwoon Yoon),최철진(Chul Jin Choi),박광명(Kwangmyung Park),안정훈(Jeong Hun An),안원(Won Ahn),김기원(Gi Won Kim),박승기(Seoung Ki Park),이용만(Young Man Lee) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
The first Korean heavy ion linear accelerator, named RAON, will be operating at 2 K. The 2 K temperature can be achieved using superfluid helium (at 2.0 K, 23.4 Torr). In the SRF test facility, superfluid helium at 2 K is produced by the 2K-system which consists of a 2K-module, a warm pump system, and a control system. The 2K-module is a sort of cryomodule to keep the superfluid helium at 2 K. The warm pump system pumps down the vapor pressure of liquid helium and the control system keeps the vapor pressure at 23.4 Torr with a butterfly valve. This paper presents the operation procedure of the 2K-system and the result of cooldown test.
김옥형,박승기,정재훈,임경호 公州大學校 工學硏究院 生産技術硏究所 2004 論文集 Vol.12 No.-
The volume of wastewater in combined sewers in study areas usually exceeds capacities of the sewer system or the treatment plant during storms. For this reason, combined sewer systems are designed to overflow occasionally and discharge excess waste water. The 6 monitoring sites were selected from two small cities near the Hongsung prefecture during over a rainy season. Monitoring was performed by collecting grab samples and by measuring the rainfall and flow rates during dry and wet seasons. Generally the flow rate of wastewater in combined sewers was rapidly decreased after 23:00 PM and gradually increased from 06:30 AM in all sites during the dry season. Due to monitoring and statistical analysis, the groundwater contributes on sewage volume increase (average 3.4-25.4% more) during experimental periods. Therefore, this research is focus on the investigation of the effects of stormwater and groundwater to combined sewer systems.
Synthesis of the New Diaryl Ether Compounds
Park, Seoung Ki 수원대학교 기초과학연구소 1997 基礎科學論文集 Vol.6 No.-
치환된 hydroquinone과 ethyl 2-chloropropionate의 반응으로부터 화합물(1)을 합성한 후, 이 화합물을 여러 가지 chloropyrazole과 반응시켜 원하는 새로운 diaryl ether화합물을 합성하였다.