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부탄 분자와 H₂C=C 그룹을 이용하여 수정된 하이브리드 탄소나노튜브의 비틀림 후 좌굴 거동과 밀폐 여부의 영향
정병우(Byeong-Woo Jeong) 한국산학기술학회 2021 한국산학기술학회논문지 Vol.22 No.8
부탄 분자로 안쪽이 채워지고 H₂C=C 그룹이 외벽에 부착되어 수정된 하이브리드 탄소나노튜브에 대해서 비틀림 후 좌굴 거동을 분자동역학 전산모사 방법을 이용하여 관찰하였다. 또한, 이러한 비틀림 후 좌굴 거동에 대한 하이브리드 탄소나노튜브의 밀폐 여부 영향을 비교 분석하였다. 수정된 하이브리드 탄소나노튜브는 첫 번째 비틀림 좌굴이 일어난 이후에 거의 영에 가깝던 비틀림 강성이 다시 커지는 독특한 비틀림 후 좌굴 거동을 보여주었으며, 결과적으로, 첫 번째 비틀림 좌굴 모멘트에 비해서 최종 비틀림 좌굴 모멘트가 월등히 큰 것을 확인하였다. 또한, 비틀림 후 좌굴 단계에서의 이러한 비틀림 강성과 최종 비틀림 좌굴 모멘트는 하이브리드 탄소나노튜브의 밀폐 여부에 의존하였으며, 캡으로 밀폐된 경우에 중요하게 큰 것을 확인하였다. 밀폐되지 않은 하이브리드 탄소나노튜브의 경우에 부탄 분자가 비틀림 좌굴 영역을 피해서 외부로 이동하는 움직임을 확인할 수 있었다. The torsional post-buckling behaviors of capped and uncapped hybrid carbon nanotubes filled with butane molecules and functionalized by H₂C=C groups were predicted using classical molecular dynamics simulations. The observations showed that the torsional stiffness of the hybrid carbon nanotubes was decreased to almost zero for some time after the first buckling onset. Their torsional stiffness then increased significantly at the post-buckling stage, indicating stiffened post-buckling behavior. As a result, their final torsional buckling moment was much larger than the first one. In addition, the torsional stiffness and buckling moment at the post-buckling stage were significantly larger for the capped hybrid carbon nanotubes than the uncapped ones. In the case of uncapped hybrid carbon nanotubes, the filled butane molecules moved outwards to avoid the radial-direction contraction by torsional buckling.
丁炳瑀 圓光大學校大學院 1981 學位論叢 Vol.6-1 No.-
This thesis is a study on the formulative and organizational principles of Hunminjeongeum derived from the Jaejahae. In formulating the writing system of Hunminjeongeum, the Chinese phonology, the interacting principles of Yin and Yang, the thought of Iching exerted absolute influence. Yet those principles and thought were not blindly applied, but they were creatively assimilated, producing unique originality. Characteristics of Hunminjeongeum can be cited as follows: 1. As written expression of spoken sounds, Hunminjeongeum is a scientific amalgamation of human speech organs and the great law of the Cosmos; 2. Segments of human speech sounds were based on ternary system, being divided into the initial, middle, final sounds; 3. Letters formulated as practical symbols of human speech sounds are facile to learn and comparatively few in number, thus taking on universality and perpetuality. Upon these facts derived, Hunminjeongum is duely regarded as the most brilliant and supreme product of human intelligence in the history of human writing.
丁炳瑀 圓光大學校 文理科大學 國語國文學科 1981 國語 國文學 硏究 Vol.7 No.-
This thesis is a study on the formulative and organizational principles of Hunminjeongeum derived from the Jaejahae. Informulating the writing system of Hunminjeongeum, the Chinese phonology, the interacting principles of Yin and Yang, the thought of Iching exerted absolute influence. Yet those principles and thought were not blindly applied, but they were creatively assimilated, producing unique originality. Charateristics of Hunminjeongeum can be cited as follows: 1. As written expression of spoken sounds, Hunminjeongeum is a scientific amalgamation of human speech organs and the great law of the cosmos; 2. Segments of human speech sounds were based on ternary system, being divided into the initial, middle, final sounds; 3. Letters formulated as practical symbols of human speech sounds are facile to learn and comparatively few in number, thus taking on universality and perpetuality. Upon these facts derived, Hunminjeongeum is duely regarded as the most brilliant aod supreme product of human intelligence in the history of human writing.