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Norbornene Dialkyl Ester가 첨가된 PVC의 물성 연구
윤대희 ( Dae Hee Yun ),고태원 ( Tae Won Ko ),우제완 ( Je Wan Woo ) 한국공업화학회 2014 공업화학 Vol.25 No.6
In this study, we observed changes in the physical properties of norbornene dialkyl ester applied to a PVC. The PVC specimens were prepared by blending PVC, norbornene dialkyl ester and stabilizers. Then, the hardness, tensile strength, elongation, tearing strength, transmittancy, haze and yellowness index of these specimens were measured, and were compared with DOP. The hardness of compounds except dicyclohexyl-5-norbornene-2,3-dicarboxylate (DCHN) were an equal to or higher than that of DOP. The tearing strength and tensile characteristic of DCHN could not be analyzed due to its high hardness. Tensile properties such as the tensile strength and elongation were improved for six compounds except diisononyl- 5-norbornene-2,3-dicarboxylate (DINN). All compounds measured showed better tearing strength and transmittancy than those of DOP. Also all norbornene derivatives except DDN showed good haze indices. The yellowness index of DON and DPN showed similar values as DOP.
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이종희,고태원 경희대학교 체육과학연구소 2004 體育學論文集 Vol.32 No.-
This study aims at examining the behavior patterns of training by basketball coaches at universities and professional teams and analyzing the difference between behavior pattern of coaches preferred by players and actual behavior pattern recognized by them for purpose of efficient coaching of basketball. The study aimed for total of 330 participants, except for 12 stand-by players by each team, including 13 teams at universities registered at University Basketball League in the year 2004 and 16 teams of male and female professional players registered at KBL and WKBL. This study used LSS survey for measuring sport leadership developed by Chelladurai & Saleh(1980), translated by Byeong-hyeon Kim in Korean in order to examine behavior pattern of coaches who train basketball players and adopted statistical analysis such as singular dispersion analysis and independent t-verification, dependent t-verification to get some findings. 1. basketball coaches prefer training and directive behaviors.2. The older the basketball coaches are and the more career they have, the more they prefer despotic behavior; the less career they have, the more directive and socially supportive behavior they showed in training. 3. Professional basketball players are in favor of despotic behavior of coaches, compared to basketball players at college. 4. Regardless of sex of basketball players, coaches showed training and directive behavior. male players supported socially supportive behavior of coaches, while female ones supported positive compensational behavior of coaches. 5. the more career the players have, the more they like despotic behavior of coaches the more career the players have, the more despotic behavior the coaches showed.
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