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김진남(Kim, Jin-Nam) 한국산학기술학회 2013 한국산학기술학회논문지 Vol.14 No.11
환자 및 노약자 이동에 중요한 역할을 하고 있는 수·전동휠체어의 핵심부인 구동부를 새롭게 설계했다. 구동 부는 고속모터와 다단기어 치형을 설계적용하고, 굽힘강도와 면압강도를 고려해 큰 추진력을 얻을 수 있도록 성능을 검증하였다. B-Type의 마찰판식 클러치 전자식 브레이크(다판 방식의 무여자 작동형)를 동 축상에 설치해, 큰 토크에 도 급격한 제동이 가능하도록 했다. 본 연구에 설계된 다단치차 감속기를 수·전동휠체어 구동장치에 사용하므로서, 소형화, 경량화를 이루고 구동 효율이 기존제품보다 30% 향상된 구동부를 구성할 수 있었으며, 보수 및 관리의 용이성을 함께 추구했다. Application of electric wheelchair, sort of wheelchair which is playing important role in transporting patients and old people, has been increasing. In this study, we designed the electric wheelchairs' driving system. Using the multi-step gear, the driving system can get great power, even though the small capacity of motors. First, we designed the multi-step gear, test its bending strength and contact strength, as well as verified its performance. We installed 'B-type electric brake(Multiple plate clutch, Anti-magnetization) in same axle of the driving system, so it is possible to stop under huge torque and small size. Using this driving system of the multi-step gear which we designed, it's possible to improve driving gear efficiency 30% up and create the high-competitive electric wheelchair. And, it is easy to repair and control.
경기도지역 어린이집과 유치원 급식의 소금함량 및 유아 식사준비자의 나트륨 섭취관련 식태도 조사
김진남(Jin Nam Kim),박서연(Seo Yun Park),안소현(So Hyun Ahn),김혜경(Hye Kyeong Kim) 대한지역사회영양학회 2013 대한지역사회영양학회지 Vol.18 No.5
Dietary habit of excess sodium consumption is formed mainly by excessive salt intake from the younger age and this may lead to hypertension, stroke, and stomach cancer. This study was performed to estimate the salt content in kindergarten meals and provide basic data on meal providers` dietary attitude to sodium intake for nutrition education. We collected data on161 food items from 16 institutions in Gyeonggi-do and salt content was calculated from salinity and weight of individual food items. The average salt content from lunch meals was 2.2 g, which was about daily adequate intake of sodium for children aged 3 to 5 years old. Greatest contributor to the salt content in a meal was soup and stew (47.8%). The most salty dishes were sauces and kimchi followed by stir-fried food, deep-fried food, braised food, and grilled food. The salt content was higher in soup and stew despite of low salinity, due to the large quantity per serving. The salt contents of soups and kimchi were 40.6% and 14.3%, respectively of the total salt content in dish groups. Staff members and caregivers at home who prepared food for the child showed preference for one-dish rice meal, dried fish and salted mackerel, and broth when eating soup, stew, and noodles. Caregivers showed higher sodium index score and had higher preference for processed food such as Ramen, canned food, and ham compared with staff members (p < 0.05). These results suggested that monitoring salt content of kindergarten meals and nutrition education for those prepare meals for children are needed to lower sodium intake in childhood. (Korean J Community Nutr 18(5) : 478~490, 2013)
EGR 개별 공급 장치 형상에 따른 기통별 유동 및 분배 특성
김진남(Jin Nam Kim),김호영(Ho Young Kim),이원근(Won Geun Lee),김우태(Woo Tae Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_1
EGR is a primary emission control technique for the suppression of NOx, but combustion instability is occurred occasionally due to mal-distribution of fresh air and EGR gas at each cylinder. In this study, to improve EGR distribution characteristics, numerical simulations are performed to obtain the flow, the mixing characteristics and the EGR gas distribution at each cylinder for various configurations of individual EGR supply system in a 4-cylinder engine. The results show that the branch diameter has an important role in the mixing and EGR distribution characteristics. Also, the flow of EGR gas is highly depends on the air flow to each cylinder.