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이진원,정유선,정태영,김종대,최해윤,Lee, Jin-Won,Jung, Yu-Sun,Jung, Tae-Young,Kim, Jong-Dae,Choi, Hae-Yun 대한한방내과학회 2013 大韓韓方內科學會誌 Vol.34 No.1
Objectives : The object of this study was to obtain acute information (single oral dose toxicity) of Scutellariae Radix Aqueous Extracts (SR; yield = 27.20%) which traditionally have been used in Korean medicine for treating various diseases including inflammatory diseases. Methods : In order to observe the 50% lethal dose ($LD_{50}$), approximate lethal dosage (ALD) and target organs, SR Aqueous Extracts were once orally administered to female and male ICR mice at dose levels of 2,000, 1,000, 500 and 0 (control) mg/kg (body weight.) according to the recommendation of KFDA Guidelines. The mortality and changes on body weight, clinical signs and gross observation were monitored during 14 days after single oral treatment of SR according to KFDA Guidelines with organ weights and histopathological observations of 14 types of principle organs. Results : After single oral treatment of SR, we could not find any mortality and toxicological evidences up to 2,000 mg/kg treated group, the limited dosages in rodents, on the body and organ weights, clinical signs, gross and histopathological observations, except for some accidental findings. Conclusions : The results obtained in this study suggest that the $LD_{50}$ and ALD of SR in both female and male mice after single oral treatment be considered as over 2,000 mg/kg because no mortalities were detected up to 2,000 mg/kg that was the highest dose recommended by KFDA and OECD, and can be safely used in clinics.
이진원,김남원,이정우,서병하,Lee, Jin-Won,Kim, Nam-Won,Lee, Jeong-Woo,Seo, Byung-Ha 한국농공학회 2009 한국농공학회논문집 Vol.51 No.6
This study is to suggest the SWAT model as inputs for the estimation of CN (Curve number) if we do not have hourly rainfall and runoff data in the ungaged watershed. The daily CNs were estimated by using SWAT model for Chungju dam watershed and the CNs by hourly rainfall and runoff data in the same period with daily CN estimation were also estimated. Then the daily and hourly CNs were compared each other. The CNs by SWAT model were larger than the actual CNs. 7.4% larger in AMC-I, 1.2% in AMC-II, and 6.3% in AMC-III respectively. If we consider various uncertainties in the estimation of CN, the error of 6.8% could be acceptable for the application in the field.
이진원,장욱진,박진호,박영일,이장무,Lee, Jin-Won,Jang, Uk-Jin,Park, Jin-Ho,Park, Yeong-Il,Lee, Jang-Mu 대한기계학회 2000 大韓機械學會論文集A Vol.24 No.10
A planetary gear assembly is a key component to combine and/or split a power from the source. With a planetary gear assembly, a continuously variable unit extends its capacity by means of power bra nching mechanism. Power branching with one planetary gear assembly and one continuously variable unit is categorized into 12 basic types. Each type represents peculiar power transmitting characteristics. Additionally, a multi-mode (range) continuously variable transmission can be designed with accompanying clutches. A multi-mode continuously variable transmission changes the path through which the source power is transmitted. Each path has its own features, such as high efficiency. In this paper, some design principles are examined such as, criteria to guarantee the minimum power efficiency, and constraints to guarantee the smooth mode shift after discussing well-known features of multi-mode M mathematically.
이진원,이종원,Lee, Jin-Won,Lee, Jong-Won 대한설비공학회 1979 설비저널 Vol.8 No.2
Optlmum overall heat transmission coefficient for residential buildings is calculated as a function of building parameter, area/volume. Equivalent heat transmission coefficient and equivalence factor are introduced and optimized with respect to annual cost including fuel cost , insulation cost and equipment cost Comparison with recent standard of West Germany shows similarity of the result.