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Experimental Study on Behavior Characteristics in Crankshaft Oil Seal
Han Goo Kim(김한구),Sae-il Jeon(전세일),Myung Koo Kim(김명구),Akio Nakamura,Se Jong Yoo(유세종),Mun-Ha Lee(이문하),Myoung-Hun Oh(오명훈),Jung-Kyou Kim(김정규) 한국자동차공학회 2006 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
The behavior characteristics of the gasoline engine crankshaft oil seal regarding the assembling condition are being experimentally studied. Normally, most of the crankshaft oil seals are assembled onto the housing which is created after the cylinder block and the oil pan are assembled. Since the cylinder block and the oil pan are separate parts, mismatching quantity presence cannot be avoided which has influence on the crankshaft oil seal behavior characteristics. Thus, experimental study has been taken place for the leakage characteristic and the friction torque value change according to the mismatching amount variance and the engine oil temperature with the shaft velocities. The result shows that when the rotating shafts velocity is constant, leakage was present when it was over 0.6 ㎜ and friction torque increases proportional to the mismatching amount. From the experimental study, it was relevant that the assembling condition of the cylinder block and the oil pan has effects on the behavior characteristics for the crankshaft oil seal.
MERRA 재해석 자료를 이용한 복잡지형 내 풍력발전단지 연간에너지발전량 예측
김진한(Kim Jin-Han),권일한(Kwon Il-Han),박웅식(Park Ung-Sik),유능수(Yoo Neungsoo),백인수(Paek Ins) 한국태양에너지학회 2014 한국태양에너지학회 논문집 Vol.34 No.2
The MERRA reanalysis data provided online by NASA was applied to predict the annual energy productions of two largest wind farms in Korea. The two wind farms, Gangwon wind farm and Yeongyang wind farm, are located on complex terrain. For the prediction, a commercial CFD program, WindSim, was used. The annual energy productions of the two wind farms were obtained for three separate years of MERRA data from June 2007 to May 2012, and the results were compared with the measured values listed in the CDM reports of the two wind farms. As the result, the prediction errors of six comparisons were within 9 percent when the availabilities of the wind farms were assumed to be 100 percent. Although further investigations are necessary, the MERRA reanalysis data seem useful tentatively to predict adjacent wind resources when measurement data are not available.
김일한(Il Han Kim),한성환(Sung Whon Ha),박찬일(Charn Il Park),심영수(Young Soo Shim),김락경(Noe Kyeong Kim),김건열(Keun Youl Kim),한용철(Yong Chol Han) 대한방사선종양학회 1984 Radiation Oncology Journal Vol.2 No.2
From 1979 to 1982, 80 patients with unresectable non-small-cell lung cancer without metastasis were treated with high-dose radiotherapy to the primary and to regional lymph nodes with or without supraclavicular lymphatics in the Department of Therapeutic Radiology, Seoul National University Hospital. Of these, 56 patients(70%) were completely evaluable and 59 patients(74%) had squamous cell carcinoma, 13% large cell undifferentiated carcinoma and 8% adenocarcinoma, 21 patients(26%) had StageⅡ and 59 patients(74%) had Stage Ⅲ. The complete and parial response rate in the high-dose(≈6,000 rad) radiotherapy was 70% with 19% complete response, 69 patients(86%) failed in the treatment, by the failure pattern, 64% had local failure alone, 35% had local failure and distant metastasis and 1% had distant metastasis alone. The failure rate in the thorax were 76% in squamous cell carcinoma, 40% in adenocarcinoma and 20% in large cell undifferentiated carcinoma. Preliminary result shows that actuarial survival at 1, 2 and 3 years were 56%, 26% and 20% in overall patients and 64%, 37% and 21% in StageⅡ and 54%, 21% and 18% in StageⅢ, respectively. Overall median survival was 14 months; 17 months in StageⅡ and 13 months in StageⅢ. 8 patients(10%) have lived a minimum of 2 years with no evidence of disease. There was no fatal complication confirmed to be induced by radiotherapy, so definitive high-dose radiotherapy was tolerated well without major problems and resulted in good local control and survival.