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舞踊專攻 女高生의 人性變化 關聯 變因에 關한 硏究 : 藝術高等學校 學生을 中心으로
김인숙,이종희,이용덕 경희대학교 체육과학연구소 1999 體育學論文集 Vol.27 No.-
The subjects of this research is 229 high school girls who major in dancing at high schools of arts, We used the new personality-testing method to fond how much and in what kind of way experiences in dancing at each major have influence on the change of personality. And also we took One Way ANOVA to find the factors that have effects on the change of personality and to verify the differences among the items such as majors, careers, time to begin dancing, rank to be born, religions, and ten items of characteristic personality based on how poor educational levels of the heads of their families are, etc. In this way, we came to a conclusion as follows. 1.The group of modern dancing has a higher anti-social tendency than that of Korean dancing and batlet by significance level(p〈.001) in comparison of each major. The group of middle school has a higher anti-social tendency than that of preschool children and primary school students by significance level(p〈.01) in comparison of time to begin dancing. We found there was self-regulation and anti-social nature by significance level(p〈.05) in comparison of religions. And we found there was leadership by significance level(p〈.05) in comparison of educational levels of the heads of families. 2.We found that, of six main factors, a career was the one which had much influence on the change of personality and there was significance level(p〈.01) among rest, thoughtfulness, and an anti-social tendency in comparison of careers. And also there was significance level(p〈.05) among achievement, activeness, a tendency of neurosis, and that of a mental disorder. Considering the conclusions above, We came to the conclusion that careers of high school girls which means participation in dancing or such experiences have much influence on the change of personality and that the factors related to religions somewhat have an effect on it. However, analysis is showed that such (actors as majors, time to begin dancing, rank to be born, and educational levels of the heads of families, etc. have few effect on it.
Effects of Grain Size on the Fatigue Properties in Cold‑Expanded Austenitic HNSs
신종호,Young‑Deak Kim,Jong‑Wook Lee 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.6
Cold-expanded austenitic high nitrogen steel (HNS) was subjected to investigate the effects of grain size on the stresscontrolledhigh cycle fatigue (HCF) as well as the strain-controlled low cycle fatigue (LCF) properties. The austenitic HNSswith two different grain sizes (160 and 292 μm) were fabricated by the different hot forging strain. The fine-grained (FG)specimen exhibited longer LCF life and higher HCF limit than those of the coarse-grained (CG) specimen. Fatigue crackgrowth testing showed that crack propagation rate in the FG specimen was the same as that in the CG specimen, implyingthat crack propagation rate did not affect the discrepancy of LCF life and HCF limit between two cold-expanded HNSs. Therefore, it was estimated that superior LCF and HCF properties in the FG specimen resulted from the retardation of thefatigue crack initiation as compared with the CG specimen. Transmission electron microscopy showed that the effective grainsize including twin boundaries are much finer in the FG specimen than that in the CG specimen, which can give favorablecontributions to strengthening.