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서준석,김희진,유회수,Seo Jun Seok,Kim Hee Jin,Ryoo Hoi-Soo 대한용접접합학회 2005 대한용접·접합학회지 Vol.23 No.3
It is required for the steel materials used in the sour environment to have sufficient resistance to hydrogen induced cracking(HIC). For line pipe steels, HIC resistance could be varied during pipe making process due to the large plastic deformation applied in the thick-wall pipe. In order to figure out such effect, HIC tests were performed not only in the plate condition but in the pipe condition and their results were compared in terms of cracking ratio. Test results demonstrated a detrimental effect of plastic deformation to HIC resulting in a substantial increase in the cracking ratio after pipe forming process. All of the cracks found in the pipe material were located in the outer layer of pipe where the tensile strain was resulted during pipe forming stage. In order to understand the HIC resistance of the pipe but in the plate condition, it was suggested to pre-strain the plate to some extent before the HIC test.
徐俊奭 慶一大學校 1999 論文集 Vol.16 No.4
Recently, there has been rapid increase in database marketing between domestic banks and foreign banks, reflecting the change of world and domestic economic enviroment. The purpose of this study are 1) to find out comparative study on database marketing among Korean, Japanese and American banks 2) to evaluate possible implications for Korean banks's database marketing strategy and consider the effcient countermeasures of Korean banks.
徐俊奭 경일대학교 2001 論文集 Vol.17 No.-
Recently, there has been rapid increase in internet management between domestic firms and foreign firms, reflecting the change of world and domestic economic environment. The purpose of this study are 1) to find out results of case studies on internet management among Korean and foreign firms 2) to evaluate possible implications for Korean firms' internet management strategy and consider the efficient countermeasures of Korean firms.