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수용성 미셀용액에 가용화된 9-Methylanthracene의 평균 미세환경의 성질
朴哲浩,高正秀,吳世雄 木浦大學校 基礎科學硏究所 1993 基礎科學硏究誌 Vol.11 No.-
The average microenvironmental polarity of 9-MA which was solubilized in a micellar solution was estimated by UV spectroscopic characteristics sensitive to the polarity of solvent. When 9-MA was solubilized in aqueous CTAB, SDS, and Brij 35 solutions, its microenvironmental polarity parameter showed little dependence on the ionic properties of the micelles. The average microenvironmental polarity of 9-MA was similar to the polarity of mixed solvents between 50%(W/W) methanol-water mixture and 40%(w/w) methanol-water mixture. It was found that the greater part of 9-MA might be distributed at the surface of micelles when it was solubilized in aqueous micellar solutions.
정철웅 서강정보대학 1999 論文集 Vol.18 No.-
Throughout two World Wars, mankind experienced death, horror, and the anguish of life. So men lost their own religion, belief, purpose, and meaning. Under the unreasonable and the absurd human condition, dramatic language in modern drama became ambiguous and uncertain. The problems of language in contemporary literature, especially drama, stems from the discrepancy between subjectivity and objectivity, between outside and inside, and between appearance and reality. Therefore language came to lose its traditional and original function of communication. Literature which depends upon language that lost its function tends to persue nothingness. The fundamental change of function of language accompanied the reduction of man' s value, which was inevitalbe in the middle of political, economical, social, and religious changes of the 19th century and the 20th century. Facing these changes, poeple came externally to feel the crisis of civilization and internally to realize the tragic side of life. This tragic realization of self resulted in the tragic realization of modern playwrights. They no longer relied upon language to express the deep realization of life, since language already lost its function of communication. They tried to use silence instead of language. Silence in Beckett's dramas is located in the base of being and common everywhere in life. Under the situation in which language is in the crisis of losing its function and meaning, Beckett, as an artist committed to the obligation of expressing something, continuously splitted and destroyed language, and thereby filled silence in the points when language was useless, and finally managed to complete language.
레이저 유도 격자 분광장치 제작 및 C₃H8 화염에서 열 격자 측정
박철웅(Chul Woung Park),한재원(Jae Won Hahn),이중재(Joong-Jae Lee),이영우(Young-Woo Lee),고동섭(Dong-Seob Ko) 한국광학회 2001 한국광학회지 Vol.12 No.6
레이저 유도 격자 분광장치를 제작하여, C₃H_8 층류 확산화염에서 생성된 열 격자 신호를 측정하였다. 열 격자를 생성시키기 위한 여기광은 파장이 532 ㎚인 Nd:YAG 레이저를 사용하였고, 검침광은 488 ㎚의 CW Ar+ 레이저를 이용하였다. 검침광의 세기를 변화시켜 장치의 회절효율과 신호 특성을 측정하였다. 측정된 열 격자 신호의 세기를 분석하여 화염내의 매연의 농도 분포를 정성적으로 측정하였고, 신호의 주파수 변화를 측정하여 온도 분포를 구하였다. We made a laser induced grating spectrometer(LIGS) and measured the thermal grating signal generated in a C₃H_8 flame. The thermal grating was formed in the C₃H_8 flame with two second-harmonic Nd:YAG pulse laser beams, and an LIGS signal was generated by Bragg scattering of a probe laser beam Ar+ laser(488 ㎚). We found the modulation period of the signal depends linearly on the spacing of the grating set in the flame. We determined flame temperature by fitting the modulated signal and soot concentration with signal strength. Using this technique, we also obtained temperature profile and soot-particle distribution in a C₃H_8 flame.
Park, Chul Woung,Kim, Bong Hak,Lee, Dong-Hoon,Park, Seung Nam Springer-Verlag 2005 Metrologia Vol.42 No.1
<P>A nickel carbon eutectic point was realized by a radiation thermometer for two geometrically different fixed point cells made by an optimized filling process. The process was based on monitoring the variation of the melting–freezing temperature difference as a function of the filling ratio of the cell. The integrity of construction and the filling endpoint could be confirmed by observing a clear convergence of the melting–freezing temperature difference as the filling ratio increases. From 14 sets of realizations with two different cells and two different spectral bands of the radiation thermometer, the eutectic temperature is determined to be 1328.73 ?C with an expanded uncertainty of 0.22 ?C (<I>k</I> = 2).</P>