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이성현,김금배,김미숙,유형준,박승우,정해조,지영훈,이철영 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.4
The purpose of this study was to determine the dependence of the dose distribution on the width of the respiratory gating window by using radiochromic Gafchromic EBT2 film. An in-house threedimensional breathing simulator was used with a 4-s cycle and a 3-cm movement. The gamma index and the 50, 95, and 20 ?80% dose distributions were individually analyzed with regard to static, 100 (full motion), 60, 40, 30, 20, and 15% respiratory gating windows. In addition, dose differences based on the different extents of exposure were compared and analyzed along with total beam delivery time. Dose distributions became increasingly similar to the static value with decreasing respiratory gating window width. The extent differences from the static case for the low-dose region were not significant; neither were the extent differences for the high-dose region and 30, 20, and 15% gating windows (P = 0.388, 0.275, respectively). However, the 40% gating window showed a significant difference (P = 0.001). Moreover, the treatment time for the 30% gating window was reduced by more than half compared to that for the 15% gating window. Thus, the 30% window would be a reasonable choice for maximizing the range of the gating window while markedly decreasing the dose difference and the treatment time.
이성현 중국어문학연구회 2023 중국어문학논집 Vol.- No.139
Shan-Hai-Jing(山海經) is the greatest Chinese mythology, among them, the myth of Xi-Wang-Mu(西王母) has a great influence on posterity. And as an important image in Wei-Jin-Nan-Bei-Chao era’s(魏晉南北朝), the Qing-Niao(靑鳥) is described as messenger of the love. There are many studies on Xi-Wang-Mu, but There is no research on literary Qing-Niao image. The content of this thesis is Clarify the changes of literary Qing-Niao image, focusing on the Chinese Middle Ages. In the Middle Ages, the image of a lover's messenger Qing-Niao was a popular, which was the result of the continual attachment of Xi Wang Mu, Mu Wang(穆王), lovers, and marital symbols to the Qing-Niao. Before the Tang Dynasty, there was not only a symbol of messenger between lovers, but it could be seen that writers contributed to the complexity and diversification of Qing-Niao images such as proof of love, shen-xian(神仙), death, orange.