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이호용,임중연,마상백 동국대학교 산업기술연구원 1997 산업기술논문집 Vol.9 No.-
실험적으로 결정된 응력-변형률 곡선과 측정된 로울-스트립(strip) 접촉면에서의 속도분포를 탄-소성 유한요소모델에 입력하여 스트립 압연에 대한 해석을 시도하였다. 변형된 로울의 형상은 수치모델에서는 원형으로 간주하였고 실제 접촉 길이에 근거하여 응력-변형률 분포와 속도장이 계산되었다. 단면감소율에 따른 로울 압하력의 유한요소해석 결과를 얻었고 이를 실험결과와 비교한 결과 근사한 일치를 보여 주었다. Experimentally determined stress-strain curve and measured roll-strip interface velocities are used as input to an elastic-finite element model of strip rolling. The shape of the deformed roll is assumed to be circular in the numercal model and is based on the actual contact length. The stress and strain distributions and velocity fields are computed. The predictions of the roll separating force for several reductions compare favorably with the experimental results.
비가림 및 망사 시설재배가 참다래의 수체생육 및 과실품질에 미치는 영향
나양기,마경철,임동근,김병삼,임경호,김월수,이상현,박용서 全南大學校 農業科學技術硏究所 2001 農業科學技術硏究 Vol.36 No.-
This studies were conducted to investigate the effects of rain shelter and netting on the tree growth, fruit set fruit quality of kiwifruit (Actinidia deliciosa). In rain shelter and net house, shoot falling wasn't occurred by strong wind, and fruit set, fruit weight and also fruit malformation, side flowering increased at the same time. In rain shelter house the increment temperature forced blooming date and increased shoot length, leaf number and diameter but in net house these tendencies were not observed. Relative light intensity of rain shelter house was higher than that of net house with standard of field culture (relative light intensity: 100%). Soluble solid content was higher in rain shelter house, and acid content was higher in net house. With the effect of rain sheltering the occurrence of bacterial bloom rot and canker significantly decreased in both rain shelter and net house but insect injury increased. These data showed that rain shelter house is more suitable for kiwi fruit culture.
원종필,방청세,마상용,박경석 慶熙大學校 1997 論文集 Vol.26 No.-
The higher output levels attained by automotive engines recently been accompanied by an increase in the amount of heat released by the engine. This higher heat release level has caused the thermal load in the engine compartment to rise. As a result, greater emphasis has been placed on thermal analysis of heat radiation from the radiator and of heat release from the engine. Heat release the coolant from the engine is released with heat transfer. It is. thus, the essential element to analysis of heat transfer process in cooling system for an automotive engine. However, most of the research about heat release to the coolant is performed from the standpoint combustion, so this research is done from the standpoint of heat transfer to the cooling system including the engine coolant. This study is performed on the analysis of heat release chracteristics in cooling system for an automotive engine according to the operating and cooling conditions. The results are summarized as follows: 1. The heat release is increased according as coolant temperature is decreased and coolant flowrate is increased. 2. The heat release is increased and heat release per power is decreased according as engine is increased with same engine speed. 3. The heat release is increased by increasing fuel comsumption according as engine speed increased.
포도 중 Tebuconazole의 잔류성에 미치는 몇 가지 변동요인의 영향
한성수,노석초,마상용 한국환경농학회 2004 한국환경농학회지 Vol.23 No.3
Tebuconazole의 안전성 평가를 위한 기초자료를 얻기 위하여 tebuconazole의 처리시기, 처리횟수, 봉지 씌우기(괘대) 및 세척방법에 따른 잔류성을 조사하였다. 수확 전 처리횟수가 3회~5회 처리로 증가함에 따라 tebuconazole의 잔류량이 높게 나타났으며, 처리횟수가 동일한 조건에서는 최종 처리후 경과일수가 길수록 잔류량이 적게 나타났다. 처리횟수 및 최종 처리 후 경과일수가 동일하더라도 최초 약제처리 시기에 따라 잔류량의 차이가 나타나 기상 조건 및 과실의 생육상태에 따른 잔류량 변동 가능성이 시사되었다. 과실 1개당 무게가 2.5~7.5 g의 범위에서 과실 개체의 크기가 작을수록 높은 잔류량을 보였으며, 잔류성분의 대부분이 과피에 분포하였다. 괘대 과실의 과피에서 무괘대 과실의 과피에 비하여 매우 낮은 잔류량을 보였다, 과육 중의 잔류량은 괘대 포도에서는 검출한계 이하로, 무괘대 포도에는 0.05 mg/kg 수준으로 분포하였다. 세척 전의 잔류량이 0.86 mg/kg 수준인 포도 시료에서는 물에 1분간 침지하고 흐르는 물에 1~2회 세척 시에 잔류량의 약 25~67%가 제거되었으며, 침지처리 후 3회 세척한 시료에서는 검출한계 이하의 잔류량을 보였다. 세제용액에 침지하고 흐르는 물에 세척한 경우에는 물 침지에 비하여 높은 제거효과가 나타났으며, 세척 전 포도 중의 잔류량이 낮을수록 제거효과가 높게 나타났다. Dissipation pattern of tebuconazole was evaluated by establishing application methods of the fungicide, paper-bagging of grape during growth and washing of grape after harvest. Application times increased from three to five resulted in high levels of residues in grape. Tebuconazole in grapes was present in different residual patterns with periods after final treatment, ranging from 7 to 25 days. Significant differences in the residual patterns were also found when tebuconazole was treated during three different application periods, possibly due to meteorological condition and/or grape growth during each period. At the range from 2.5 g to 7.5 g of grape granules, residues were higher in small-sized grape than in big-sized grape and were mostly distributed on the peel of the grapes. Paper-bagging was a critical factor for reducing the fungicide residue on the peel. Flesh of bagged and no-bagged grape had very low level of residues, 0.01 mg/kg and 0.05 mg/kg, respectively. Residues on grape was effectively eliminated with the washing methods suggested, a consecutive sinking-washing system. Using of detergent solution during washing showed maximum residue reduction from grape. The washing methods showed effective action on the removal of lower content, providing complete elimination, or almost, of the residues.
칼슘제 수관살포가 참다래의 과실 품질과 저장에 미치는 영향
임경호,나양기,임동근,마경철,조윤섭,김월수,이상현,박용서 全南大學校 農業科學技術硏究所 2001 農業科學技術硏究 Vol.36 No.-
This study were carried out to improve Kiwifruit quality and storage life. Three kinds of calcium compound were sprayed and calcium content of fruits, weight loss during fruit storage and fruit quality were investigated. Calcium contents within leaves and fruit were lower in Clef-non treatment than that of control. The calcium content in fruit pericarp of Kalk-H and CaCl2 was 0.04 to 0.05% higher than that of control. Fruit weight and soluble solids content at harvest was a little higher but acidity and fruit hardness was lowered. Fruit weight loss of Kalk-H and CaCl2 treatment was 1.39 to 1.53% lower than that of control during storage. The soluble solids of ripen fruit was 1.0 to 1.3% higher in all treatment and 0.8% higher in Kalk-H treatment in 120 of after storage. Fruit hardness of control fruit was higher at harvest but that of CaCl2 treatmented fruit was 0.39㎏/φ 5㎜ higher in 120 days of storage.
Kawasaki Disease in Korea, 2003–2005
Park, Yong-Won,Han, Ji-Whan,Park, In-Sook,Kim, Chang-Hwi,Cha, Sung-Ho,Ma, Jae-Sook,Lee, Joon-Sung,Kwon, Tae-Chan,Lee, Sang-Bum,Kim, Chul-Ho,Lee, Heung-Jae,Yun, Yong-Soo Lippincott Williams Wilkins, Inc. 2007 PEDIATRIC INFECTIOUS DISEASE JOURNAL Vol.26 No.9
PURPOSE:: The aim of this study was to investigate the incidence rate and epidemiologic patterns of Kawasaki disease in Korea for the 3-year-period, 2003–2005. METHODS:: The questionnaire for an epidemiologic survey on Kawasaki disease was distributed to all 102 Korean hospitals that conduct pediatric residency programs, and obtained data were analyzed upon receipt. RESULTS:: The 9662 patients of Kawasaki disease from 85 hospitals that responded (response rate, 83.3%) consisted of 5877 males and 3785 females (male:female ratio, 1.55:1). The incidence rate per 100,000 children <5-year-old was 104.2 in 2003, 106.4 in 2004, and 104.6 in 2005 (average rate, 105.0). Their mean age of onset was 33.3 months, and the proportions of sibling cases and recurrent cases were 0.29% and 2.0%, respectively. Coronary arterial abnormalities were detected at follow-up by echocardiogram in 18.8% of all such cases including dilatations of 18.0% and aneurysms of 2.5%. CONCLUSION:: The average annual rate of incidence, 105.0/100,000 in children <5-year-old is the second highest reported rate in the world.