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김대현,Kim, Dai-Hyun 한국전기전자재료학회 2014 전기전자재료학회논문지 Vol.27 No.2
In this study, we report the doping effect of graphene quantum dots (QDs) in nematic liquid crystal (NLC) system on rubbed polyimide (PI) surface. The good LC alignment and high thermal stability in QD-LC cell system on rubbed PI surfaces can be measured. Also, the low threshold voltage of QD-TN cell was observed about 2.77 V. The fast response time of 13.2 ms for QD-TN cell can be achieved. Finally, the good voltage holding ratio of QD-TN cell on rubbed PI surface was measured.
저온 공정의 Si을 이용한 PI 배향 막의 전기광학 특성 향상에 대한 연구
김대현,Kim, Dai-Hyun 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.9
Apart from the deposition of alignment layer, alignment process needs to be involved for alignment of liquid crystal (LC) molecules. To simplify manufacturing process, several method were used such as rubbing, ion-beam irradiation, UV irradiation, and lithography. But, eventually it needs another treatment for LC alignment. Here, we suggested Si induced polyimide (PI) alignment layer at low temperature. Using this method, we are able to eliminate the alignment process and found that the alignment and electro-optic performance are much better than that of the rubbed PI LC cells. Compared to the rubbed PI cells, the response time was decreased by 70% and C-V characteristics have hysteresis-free.
용액 공정 기반의 다중 적층된 HfO<sub>2</sub> 박막 상에서의 액정 배향
김대현,Kim, Dai-Hyun 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.11
Effect of multi-stacked layer (MSL), 0.1 mol (M) and 0.3 mol (M) hafnium oxide ($HfO_2$) alignment layers were fabricated via a solution-process for LCs orientation. The solutions were spin-coated and annealed in a furnace. MSL consists of three sub-layers using 0.1 M solution, mono-layer (ML) is composed of 0.3 M $HfO_2$ solution. Then ion-beam irradiation was treated with 1.8 keV for 2 min. $HfO_2$-based LC cells were investigated through photographs, pre-tilt angle using crystal rotation method, X-ray photoelectron spectroscopy (XPS) measurement, and surface roughness using atomic force microscopy(AFM) for their characteristic research. Good LC orientation characteristics were observed on MSL $HfO_2$ surface. The LC alignment mechanism on MSL $HfO_2$ and ML $HfO_2$ surfaces was attributed to van der Waals (VDW) interaction between the LC molecular and substrate surface.
스타니슬랍스키 연구사 -국내 스타니슬랍스키 수용,번역,연구의 제 문제를 중심으로-
김대현 ( Dai Hyun Kim ) 한국연극학회 2010 한국연극학 Vol.0 No.40
Konstantin S. Stanislawski(1863-1938) is one of the great acting-teachers and directors. Especially his `System` influences this day like his period so many actors and directors in the world. In Korea, Stanislawski was introduced at first in 1920`s by Kim, Woojin, dramatist. After that time, his system was influenced fast everyone in the korean drama world. As a result, so many translations of his books and researches of his system are done until nowadays, but it is not perfect for the correct understanding of Stanislawski and his system. It seems to be several causes in this misunderstanding. And the purpose of this thesis is at first to observe historically the results of researches and translations on Stanislawski and his system in Korea and then to bring it in order according to characteristics. In this thesis are the process of reception observed dividing 4 periods. The first period is from the beginning to the liberation in 1945. The second is to 1980`s and the next is to the year 2000. And the final period is from that time to the present time. As a result are several characteristics found as followings: 1) translations of Stanislawski`s first book like other books, for example, Building a Character and Creating a Role, an Actor Prepares, are fast all secondhand translations, that means, man translated it not from russian direct but japanese or english. It caused man to misusing of terms and then misunderstanding on the system. 2) the researches on Stanislawski in are fast all concentrated on the book, an Actor Prepares, so this leads man to regard it as his whole acting system. On the other hand, thesisses which deal with his last and final acting technique, "the Method of the physical Action" are relatively not so much. As though man knows the last, man used to think that the system is developed systematically from the psychological technique to the physical action or the method of the physical action is only the way to understand of stanislawski`s acting method. The psychological method and the physical are not the divided, different acting technique, but pairs which are applied to different objects, that is, the actor himself and the role in texts. 3) the political aspects are not considered especially under the situation of Stalin`s social realism. This lack of the political context having relation with the system acts as a obstacle upon understanding the correct, whole his system. But so many thesises on this theme in other countries are so vivacious. For example, man can find subjects like "Stanislawski and Meyerhold", "means of Stanislawski`s method for theatres in the social context". There are also many interesting Questions related to the physical action. That is, is the physical action the final acting technique or the materialistic dialectical device to survive under the Stalin`s rule? Is there some interrelations between stanislawski`s physical action and Meyerhold`s biomechanics? In conclusion, the researches on Stanislwski and his system are not enough to understand correctly and overcome the system. We have to start the research again at least from the direct translation his books written russian in order to apply it in a new times.