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최덕순 한국아동교육학회 1998 아동교육 Vol.7 No.2
The purpose of this study was to find the problems of children's anxiety in relation to the children's attitude about mothers' employment. 'the subjects of investgation were 238 6th grade elementary school students. The questionnaire papers on the anxiety was composed of family anxiety, study anxiety, school anxiety and self anxiety. The subjects of investgation were classfied into students as a whole, male or female, and their mothers' having employment or not having employment students. ' t--test' was administered to find statistics on the differences in relation to the children's attitude about mothers' employment. The result of this study first was the children who accepted their mothers' employment showed less degrees of anxiety while those who did not accept their mothers' employment showed much higher degrees in all the areas of anxiety. However if we look at male children compared to female, the male children who accepted their mothers' employment showed lesser degrees of anxiety than those who did not accept their mothers' employment, but the female children's acceptance and non-acceptance attitudes about mothers' employment did not show any marked degree of differences in anxieties. Secondly, Also , in the case of children whose mothers have employment the result appears the same. Such as all the anxiety of children who accepted mothers' employment appeared less than degrees of those who did not accept mothers' employment. Thirdly, the children's acceptance/non-acceptance attitudes about mothers' employment has also influenced the children's anxiety in the same way in the case of children whose mothers do not have employment. Especially the children who accepted mothers' employment appeared affected in lesser degrees than those who did not accept in the low areas of anxiety, such as in family anxiety, study anxiety and school anxiety, but did not show any marked degree of difference in social anxiety or self anxiety.
TiB$_2$-Fe 서메트의 소결성 및 기계적성질에 미치는 Mo첨가의 영향
최덕순 한국세라믹학회 1999 한국세라믹학회지 Vol.36 No.5
Fe and Fe-Mo binder were used to produce TiB2 based cermet by a pressureless sintering. The densification behaviour of TiB2-Fe-Mo cermet during liquid-phase sintering in argon was studied in relation to binder phase charactertics. The effects of Mo addition and sintering condition on the sintering behaviour and mechanical properties were also investigated. TiB2-based cermets with Fe-Mo binder composition showed a better sinterability than the cermets with only Fe binder. In TiB2-Fe-Mo cermet higher densities in the wide temperature range were obtained and also fully densified sintered cermet were obtained at 1873K The enhancement in the densification phenomenon of TiB2-Fe-Mo system can be explained by improved liquid phase wettability associated with the roles of Mo components as solute atoms. When Fe-Mo binders were used cermets with a finer grain size and enhanced mechanical properties wereproduced and new phases such as Fe2B and Mo2FeB2 were observed in the sintered cermet. The highest bending strength was obtained from the 20vol% Fe-Mo cermet and these hardness-fracture toughness combination in the wide binder compositions is better than that of TiB2-Fe cermet. In order to improve mechanical properties microstructure control with high purity powders is desirable because high purity powders prevent the formation of Fe2B and Mo2FeB2 phase which comsume the ductile binder phase.
장수비, 최덕순, 김성곤, 곽홍인 국립중앙박물관 2021 박물관보존과학 Vol.26 No.-
The gilt-bronze-and-silver shoes, excavated from the Tomb of King Muryeong, revealed many defective parts, which constantly raised in-depth re-investigation and reporting. In that point, scientific treatment and analysis were conducted to investigate the manufacturing techniques applied. The conservation treatment was carried out with an emphasis on the restoration of the original form and joining parts. As a result, the upper part of the right shoe and some part of the back heel were joined, confirming the joining method and the number of rivet used for instep bonding. From the component analysis, it is presumed that the outer plate was gilded with mercury amalgam on pure copper, and pure silver was used for the inner plate. The main pattern of the gilt-bronze-and-silver shoes includes designs of phoenix, lotus, and six-petal flower, while the lotus pattern is high in terms of ratio. Thus, youngnaksa(twisted gilt-bronze thread), geumdongsa(giltbronze thread), wondujeong (rivet), and samyeonjeong(quadrangular cleats) were used for bonding each plate. Twisted gilt-bronze thread was used to join the inner and outer plates, while the center and rear of the inner plate were combined with only gilt-bronze threads. From the fact, it is presumed that the joining method was different whether the function was decoration or just bonding. Regarding the manufacturing process, traces of burnishing were confirmed on the outer surface of the gilt-bronze and silver shoes, but no burnishing traces were identified on the inner surface of the silver plate, which is likely to prove more importance put on the finishing of the outer plates rather than that of the inner. 금동은제식리는 무령왕릉에서 출토된 무령왕의 식리로 결실된 부분이 많아 재조사의 필요성이 꾸준히 제기되었다. 이에 과학적인 보존처리 및 분석을 진행하여 제작기법을 연구하였다. 보존처리는 형태 복원 및 편 접합에 중점을 두고 실시하였다. 그 결과, 우측 식리 상연과 뒤축 일부 편을 접합하여, 결합방법 및 발등 결합에 사용된 원두정의 개수를 확인하였다. 성분 분석결과, 외판 등은 순동에 수은 아말감 금도금을 한 것으로 추정되며, 내판은 순은을 사용하였다. 금동은제식리의 주문양은 봉황문, 연화문, 6엽 화문이며, 전체적으로 연화문의 비율이 높다. 각 판의 결합은 영락사, 금동사, 원두정, 사면정을 사용하였다. 내·외판 결합은 영락사를 사용하였는데, 내측판의 중앙과 후면에는 금동사로만 결합하여 장식 기능과 결합 기능을 구분하여 사용한 것으로 추정된다. 또한 제작과정에서 금동제판과 은제판의 외면에는 광쇠질한 흔적이 확인되지만, 은제판의 내면에서는 확인되지 않아 내면보다 외면의 마무리에 중점을 둔 것으로 추정된다.