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토지이용과 도로기능을 반영한 도로기반 확보수준 평가지표 개발
손봉수(Son Bong Su),권택건(Kwon Taeg Geon),이주연(Lee Ju Yeon) 한국지역학회 2004 지역연구 Vol.20 No.1
For the roadway implementation, the decision makers generally want to see a ratio of roadway area to urbanized area. However, the conventional evaluation index, roadway ratio, is not appropriate for evaluating the level of roadway establishment in urban area, since the index does not reflect the roadway functions such as highway, arterial road, collector road and so forth. The main purpose of this study is to revise the evaluation index developed by Son(2002). The revised evaluation index is able to represent the level of roadway establishment in urban area properly. The basis of revised index is to consider the amount of activity and the roadway capacity within the area to be interested. The revised index is able to represent the level of roadway establishment in urban area reasonably, and to fgure out the social and economic situation in the area interested.
연구논문초록(’81-’90) : 급냉응고한 Al - Li -X ( Cu , Mg , Zr , Mn ) 합금의 부식거동
박익민,허태영,김인배,홍영준,남동희,권택건 한국부식학회 1991 Corrosion Science and Technology Vol.20 No.1
Electrochemisal corrosion characteristics of rapidly solidified and AI-Li-X(Mn, Mg, Cu, Zr)alloys have been investigated by means of potentiodynamic polarization study. The alloys were single roll melt spun to make rapidly quenched ribbons. The ribbons were separated into 3 groups, one was left as quenched and the other two were futher aged at 200℃ and 250℃ for one hour respectively. The corrosion characteristics of those ribbons were compared with each other and also with conventionally cast alloys. It was found that rapidly solidified ribbons showed better pitting resistance and lower corrosion rates than conventionally cast alloys. It is presumed because of the grain refinement by rapid solidification. Also being aged ribbons exhibit higher corrosionrates than as quenched ribbons. This behavior can explained by the growth of precipitates and the formation of PFZ with aging treatments. The most of pirs were observed as aggregate along the grain boundaries on all the ribbons.