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전동드릴의 진동전달 특성에 따른 적정 드릴 무게의 결정
이동춘,김길주,Lee, Dong-Choon,Kim, Kil-Joo 대한인간공학회 2000 大韓人間工學會誌 Vol.19 No.2
In this study, the characteristics of transmitted vibration on HAS(hand-arm system) were identified to evaluate physical load due to the work surface orientation, tool weight and push force during powered drilling tasks. The characteristics of transmitted vibration on work surface orientation showed that the acceleration of transmitted vibration on horizontal work surface was higher than that on the vertical work surface. Regarding the characteristics of transmitted vibration on tool weight, the vibration acceleration level becomes lower as the tool weight becomes heavier. The amount of transmitted vibration on hand-arm system was decreased down to the tool weight of 2.4kg. However, as the tool weight becomes heavier than 2.8kg, the amount of transmitted vibration was increased and had peak value at 3.2kg of tool weight. Regarding the characteristics of transmitted vibration on push force, the vibration acceleration level goes higher, as the push force becomes larger. The characteristics of transmitted vibration on the axis of vibration showed that the direction of $Z_h$ had the highest acceleration compared to the direction of $X_h$, and $Y_h$. The direction of $X_h$, $Y_h$ and $Z_h$ had the highest acceleration of transmitted vibration on the hand, wrist and elbow, respectively. The results of this study showed that the condition which affect the lowest physical load to the subject on the powered drilling task would be working with the 2.4kg of tool weight on the vertical work surface.
초서의 내러티브 기법의 “성공적인”(thrifty) 모델로서 『방앗간 주인의 이야기』
이동춘(Dong-Choon Lee) 신영어영문학회 2010 신영어영문학 Vol.45 No.-
The Miller's Tale is one of the representative tales which reflect the characteristics of Chaucerian narrative style and its effect on the audience. It moves beyond the limits of its generic tradition in the Miller's description of characters, setting, the intricate interweaving of its separate plot strands. In particular, the narrator of the tale, the Miller (Robin), must be the storyteller who avails himself of Chaucerian storytelling traits of avoiding to resolve ambiguities or of preferring for the simultaneous depiction of related events. His narrative is a perfect vehicle both for unmasking the Knight's philosophical and aristocratic ideology and for uncovering the physical needs commonly lying behind human beings. Moreover, he is also the storyteller who knows the true meaning of 'game,' in terms of carnival. Though he is morally corrupted and socially belongs to lower class, Robin is one of the most artistic storytellers in The Canterbury Tales.
이동춘 ( Dong Choon Lee ) 한국영어영문학회 2010 영어 영문학 Vol.56 No.4
Chaucer`s Troilus and Criseyde is a tale of love framed by an overarching pattern of death, set in the war-torn and doomed Troy, from which the lovers cannot separate their fate. Compared with Boccaccio`s poem, the attention paid to death in Chaucer`s version underlies his complex treatment of love. Above all, the language of death in Chaucer`s poem provides the thread from which the entangled web of love is woven. Death together with desire pervades the language and rhetoric of the poem, prominent not only in the courtly love tropes, but also in the characters` asides and speeches. The prominence of these two concepts, desire and death, seem to be central to the various issues that the poem contains explicitly and implicitly. That is, two concepts are the basis for the breadth and depth of Chaucer`s examination of love in light of the social and political realities of late fourteenth century England. The language of death in Chaucer`s poem reflects the powerful influence on his imagination. With the devastation wrought by the plague and the changing fortunes of England in the war with France, Chaucer`s world was once saturated in death, and one that could amply parallel the turn from prosperity to downfall. In particular, Chaucer`s poem is suffused with the language of contagion and death in connection with desire. Troilus`s lovesickness mimics the progress of a viral infection. Once breached, his body performs its newly compromised identity through fever, loss of appetite, and physical disintegration. On the other hand, Chaucer depicts Boccaccio`s conventional portrait of Criseyde into a elaborate paramour of a pathogen. She is characterized as the contaminant that infects male hero. In addition, Criseyde is cast as sole earthly cure of illness that Troilus suffers from. In spite of Criseyde`s role as nurturer and healer, Troilus longs for his own death and feels death clutching his heart. Finally, Troilus`s love toward Criseyde is doomed to death.
이동춘 ( Dong Choon Lee ),윤훈용 ( Hoon Yong Yoon ),이상도 ( Sang Do Lee ),우동필 ( Dong Pil Woo ),장준혁 ( Jun Hyuk Jang ),신현숙 ( Hyun Suk Shin ),신종화 ( Jong Hwa Shin ),임기용 ( Gi Yong Lim ) 한국감성과학회 1999 추계학술대회 Vol.1999 No.-
실내에서 대부분의 시간을 보내는 현대인들에게 있어 쾌적한 실내환경은 작업의 효율성을 증대시킬 뿐만 아니라, 건강의 유지나 에너지 절약 차원에서 매우 중요한 요소이다. 따라서 국가에서도 감성공학 기반기술 개발 사업에서 쾌적한 실내 환경을 구현하기 위한 연구가 진행되고 있다. 본 연구에서는 이러한 연구의 결과들을 이용하여 쾌적한 실내환경을 구현하기 위한 요소를 지표화하였고, 결과 및 관련 내용을 비교·분석하였다. 그러나 지표화 과정에서 각 과제별 연구의 진행이 상호 독립적으로 이루어져 연구의 일관성이 부족한 것으로 나타났다. 또한 개별 과제의 연구 진행과정에서 상호연관성을 가진 부분이 실험계획이나 방법이 미흡해 결과에 대한 신뢰성 저하는 물론이고, 데이터 베이스 구축을 위한 자료통합에도 상당한 문제가 있을 것으로 나타났다. 이러한 문제를 해결하기 위해서 관련 연구과제 수행자들간의 적극적인 정보교류는 물론이고 지표의 타당성을 검증하는 실험도 필요할 것으로 보인다.
상대 마찰재에 따른 DLC 코팅의 트라이볼로지적 특성평가
이동춘(Dong Choon Lee),이진우(Jin-Woo Yi),김석삼(Seock Sam Kim) 한국트라이볼로지학회 2003 한국트라이볼로지학회 학술대회 Vol.37 No.-
Diamond-like carbon(DLC) films are considerable research interest because of their widespread applications as protective coatings in areas such as optical windows, magnetic storage disks, car parts, biomedical coatings and as micro-electromechanical devices(MEMs). DLC films were deposited on WC-Co by PECVD using Ar, C₂H₄ gas. Tribological tests were conducted using a ball-on-disk type tribometer in dry air. Three kinds of counter-bodies balls were used. The counter-bodies balls are SM45C, SUJ2 and ZrO₂(3.17㎜ in diameter). Wear rate of the samples were calculated afer measuring the worn-out volume of the wear track. As results wear test, the higher hardness of counter-bodies, friction coefficient low. As result of XPS estimation, wear debris generated as an oxide lower the friction coefficient.