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大邱市 변두리地域(漆谷) 幼兒園 園兒의 食生態에 關한 調査
韓東玲,牟壽美 대한보건협회 1985 대한보건연구 Vol.11 No.2
An ecological survey of early childhood nutrition was undertaken among 136 preschool children aged 3 to 6 years old, of the Saemaul Galilee day care center, located in one suburb area of Daegu, between July 7 and 13, 1984. The results are summarized as follows: The average monthly income of each family was \337,000, and 20.9% of households were below \200,000; the average number of family members per household was 4.6; and the number of family members living together per room was 3.2. About 42.9% of mothers were engaged in income generating activities. The percentage of children having meals with all the family members was 84.2% for breakfast and 80.8% for dinner. Energy intake was divided among breakfast, lunch, dinner and snack in a percentage ratio of 18 : 28 : 20 : 34. In frequency of skipping breakfast, 29.8% of subjects skipped every morning or often skipped; and the others never skipped. About 56% of those children complained of having poor appetite at breakfast. About 16% of the subjects had many dislikes in what they ate; and 54. 2% had a certain number of dislikes; and 30% had good food habits. Approximately 47.9% of the subjects had meals while watching TV. Concerning of dietary staple, boiled rice was taken at home by 94% of the subjects at breakfast; by 57% at lunch; and by 78% at dinner. The survey indicated that 58.6% of children. had simply only one kind of side-dish with boiled rice at breakfast. The survey also found that children liked laver, fruits, milk and milk products, Chajang noodle, steamed corn, and Ramyun, in that order; in contrast, lowest preference was for beans, aromatic or purple-colored vegetables, peppery and strongly flavered meals. During infancy, 64.2% of the children had been breast-fed; 17.5% had been bottle-fed; 15.8% had been combination-fed; and 2.5% had been fed cereals before the introduction of solid supplementary foods. Initiation of supplementary feeding between 7 and 8 months of age was found among 30.3% of subjects and 29.4% of subjects began to be introduced to the supplementary food before 6 months of age. As for termination of breast feeding 61.9% of subjects were between 13 to 18 months of age; 15.2% were 12 months or younger; and 22.9% were 19 to 37 months old. As for method of stopping breast feeding, 54.3% of subjects were forced to terminate by the application of medicines to the mother's nipples.
한동영(D.Y. Han),송원표(W.P. Song),김덕수(D.S. Kim),배희은(H.E. Bae) 대한기계학회 2002 대한기계학회 춘추학술대회 Vol.2002 No.3
The Circuit Breaker is a mechanical switching device, carrying and breaking currents under normal circuit conditions and also making, carrying for a specified time and breaking currents under specified abnormal circuit conditions such as those of short-circuit. In this study, we carried out the dynamic movement characteristic analysis for the spring operating mechanism of circuit breaker using MSC.visualNastran Desktop, and acquired relative response load time histories for the links and the levers of spring operating mechanism. In the future, we will perform the structural analysis of the links and the levers using MSC.Nastran, and the durability analysis using MSC.Fatigue. This study is the course for the structural and the durability analysis with spring operating mechanism of the circuit breaker
Wind Turbine Tower의 Door 용접부에 대한 피로 강도 연구
한동영(Han, Dong-Young),고장욱(Koh, Jang-Wook),최원호(Choi, Won-Ho),이승구(Lee, Seung-Kuh) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
Recently, as the global warming by fossil fuels become social issues. the interest of renewable energy producing system is increasing rapidly. Among these, wind turbines are most highlighted because of its economic competitiveness. The tower occupying about 20% of overall turbine costs, is one of the main components of wind turbine. Tower access door located to base part of the tower, is used to enter the tower. This is the main structural weak point because of door hole, weldment, etc. In this study, by FEM, we retrieved the maximum van Mises stress at door location and carried out fatigue analysis using stresses at weld toe locations of tower access door part.
한동영(Han, Dong-Young),안경민(Ahn, Kyung-Min),최원호(Choi, Won-Ho),이승구(Lee, Seung-Kuh) 한국신재생에너지학회 2006 한국신재생에너지학회 학술대회논문집 Vol.2006 No.06
Recently, as the global warming by fossil fuels and the steep rise of the oil price become social issues, the interest for renewable energy producing system is increasing rapidly. Among these, the wind turbine is most highlighted because of its economic competitiveness. The tower is one of the main components of wind turbine, which occupying about 20% of overall turbine costs. The tower access door located to base part of the tower, is used to enter the tower. This is the main structural weak points because of door hole, weldment, etc. And so are the weldments between the cans and the flanges. In this study, for the top flange part of the tower, by FEM using ANSYS, we retrieved the maximum von Mises stress on that and carried out fatigue analysis using stresses at such weak points.
한동영(Han, Dong-Young),최원호(Choi, Won-Ho),이승구(Lee, Seung-Kuh) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.06
The foundation insert is a tubular steel section which is embedded into the concrete of the foundation. The tower base section of the wind turbine is mounted on it. It has a top flange (L type) protruding far enough above the concrete to allow bolts to be inserted from underneath. The load is transmitted to the concrete at the base of the section through a T shaped flange. It has many holes for the reinforcements and the cables. The reinforcements of the concrete foundation run through the insert via a series of holes to bind the inner section to the outer section. Holes are provided for the power and communications cabling. The design follows normal European wind turbine practice, based on GL 2003 and Eurocode regulations.