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High-power Beam Test of the Photocathode RF Gun at the Pohang Accelerator Laboratory
Hong, Juho,Moon, Sung-Ik,Parc, Youg-Woon,Cho, Moohyun,Ko, In Soo,Kim, Changbum,Park, Sung-Ju,Park, Young-Jung,Kim, Seung-Hwan,Namkung, Won Korean Physical Society 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.58 No.2
Evaluation of Aperture Distribution in Fractured Granite Block Using CFD Analysis
Ki-Jong Jang,Sang-Hee Park,Bong-Ju Kim,Ja-Young Goo,Youg-Kwon Koh,Jang-Soon Kwon 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1
A deep geological repository for disposal of high-level radioactive waste (HLW) consists of the canister, buffer material, and natural rock. If radionuclides leak from a disposal container, it can pass through buffer materials and rock, and move into the biosphere. Transport and migration of radionuclides in the rock differently were affected by the fracture type, filling minerals in the fracture, and the chemical and hydraulic properties of the groundwater. In this study, aperture distribution in fractured granite block was investigated by hydraulic test and CFD analysis. The fractured rock block (1 m × 0.6 m × 0.6 m), which is simulated as natural barrier, was prepared from Iksan, Jeollabuk-do. 9 test holes were drilled and packer system was installed to perform hydraulic test at the surface of fracture. 3D model simulated for aperture distribution of rock block was made using results of hydraulic test. And then, CFD analysis was performed to evaluate the co-relation between experiment results and analysis results using FLUENT code.
Leptospermum scoparium 의 케톤체 분획물을 함유한 외용제제의 항균력
김은희(Eun Hee Kim),황성주(Sung Joo Hwang),박송희(Song Hee Park),박승룡(Seung Youg Park),이계주(Gye Ju Rhee) 한국약제학회 2000 Journal of Pharmaceutical Investigation Vol.30 No.3
Gel and cream containing 5% and 10% ketonic fraction (KF) of Leptospermum scoparium, respectively were formulated. Antimicrobial activity, stability, anti-inflammatory effect, rheological properties, drug release and acute toxicity for these topical efficacy were evaluated. Gel and cream containing neomycin or gentamycin in combination with KF has potent antimicrobial activity. Gel and cream were physically stable and did not show any creaming for 6 months storage. Gel showed plastic flow with yield value and cream showed pseudoplastic flow with hysteresis loop. The gel and cream containing KF showed higher viscosity than control or commercial one. The viscosity increased as the concentration of KF increased. Both 10% gel and cream showed a significant decrease in swelling when applied to the carrageenan-injected paw, suggesting local antiinflammatory activity. Particularly, 10% gel preparation showed similar antiinflammatory activity when compared with commercially available drugs. Percent of drug released and diffusion coefficient were in the order of 5% gel, 10% gel, 5% cream, and 10% cream, respectively. There were no significant changes of body weight in rats percutaneously administered with 10% cream and gel when compared with control. There were no induced acute toxicity when 10% cream or gel was applied to rats. Leptospermum scoparium could be practicaly used in topical preparations.