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권순박(S.-B. Kwon),송지한(J.H. Song),강석원(S.-W. Kang),정락교(R.-G. Jeong),김학범(H.-B. Kim),이창현(C.H. Lee),서동관(D.-K. Seo) 한국전산유체공학회 2013 한국전산유체공학회지 Vol.18 No.1
Personal Rapid Transit (PRT) is the emerging personal transport vehicle operating on the loop automatically. The PRT system utilize the electrical power from super capacity or battery, it is important to manage the power or energy. In this regards, the management of high temperature occurred by the operation of system is significantly important to prevent from serious damage of component. In this study, we studied the adequate shape of underbody which can reduce the heat accumulation by pickup coil and condenser using natural air cooling. We suggested the additional air pathway, air inlet and flow separator to decrease the temperature of the heat source components. It was found that suggested system can decrease the temperature of PRT under body by 16% during the static mode and by 10% during the running mode at 30㎞/h. It is expected that the findings of this study will feed into final design of newly built Korean PRT vehicle.
電氣傳導度 및 Triphenyl Tetrazolium Chloride를 利用한 차나무 耐凍性 檢定方法 確立
천종은(J.U. Chun),강석원(S.Sw. Kang),송동석(D.S. Song),최정(J. Choi) 한국차학회 2000 한국차학회지 Vol.6 No.3
Simple reproducible procedures are described for assessing freezing injury of tea leaf involving controlled freezing of excised leaves and measurements of leached electrolytes and reduction of 2, 3, 5-triphenyl tetrazolium chloride (TTC) to a water~insoluble red formazan. The results showed that two methods had highly significant linear regression (R² = 0.757), suggesting TTC test had an advantage that a small amount of tissue (30~80 mg) is required. The two methods can be used in selection and breeding for freezing resistance in tea.