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이재성 ( Jai Seong Lee ) 한국연극교육학회 2012 연극교육연구 Vol.20 No.-
A Study on the Process of the Transition and Development of Chang-geuk (the traditional Korean opera) Lee, Jai-seong Chang-geuk (the traditional Korean opera) has its origin in Pansori. But it is defined as the different style of prerforming art with Pansori, because it is presented according to the playbook and actors play their roles depending on the characters in text. Chang-geuk was strongly influenced by theatrical forms of foreign nations from its beginning in the early 1900s. Until now it is under the influence of Western theatrical principles. While not establishing its own style as an performing art native to Korea on that ground, Chang-geuk still has repeated the various experiments on performing style for the completion of Korean unique musical performances. This study investigated the process of the transition and development of Chang-geuk from its beginning up to now, and analyzed the stylistic characteristics of Chang-geuk according to each development step by step. At first the early performance style of Chang-geuk changed Pansori to the form of devided song depending on characters, after that Chang-geuk set the type of three-dimensional performance to adapt to indoor stage as rudimentary form of theatrical arts. Second in the 1930s, the Research Society of Choson Song completed the modern performance style of Chang-geuk, made major advances of Chang-geuk through conducting cultural exchanges with people who took active parts in Korean new drama. At third in the 1950s, Yeoseong Guggeuk (the traditional Korean female opera) flourished as public art, and this study analyzed its success factors and characteristics. Finally this research has organized the activities of the National Changgeuk Company of Korea for modernization of Chang-geuk`s performing style into five key phases. Chang-geuk was born under the influence of discourse for the new culture in Korean modern society. Through upheaval of modern and contemporary history, it grew as a kind of traditional art that represents Korean performing arts, while also it is the most brilliant legacy of Korean culture. Therefore Chang-geuk is to be recognized as performing art, which has developed and modernized Korean traditional performing arts continuously. Through this recognition, we must set the correct direction of development for the future Chang-geuk. The ultimate goal of this study is to contribute smaller to the academic development for Chang-geuk, in order that it can establish itself more firmly as a global musical theatre such as Western opera, Beijing opera of China and Kabuki of Japan.
송우용(Woo-Yong Song),이규성(Kyu-seong Lee),이재성(Jai-Sung Lee),신수정(Soo-Jeong Shin) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.6
Corn stalk is the lignocellulosic biomass, which remain as leftover after harvesting. To use the corn stalk as raw material for paper industry, soda pulping was applied. In chemical compositional analysis, extractive contents of corn stalk (45.1%) was higher than hardwood. With corn stalk pith, soda pulp yield was 25.3% at 10.6 Kappa number, but 39.5% yield with 14.8 Kappa number for corn stalk rind. Higher extractives content in pith is one of the reason for lower pulp yield than rind. Pith pulp fibers had higher fines content than rind pulp. Pith parenchyma cell was removed as fines during pulping or washing process, which caused the lower yield. To use the corn stalks as a raw material for paper making, de-pith process is essential for higher pulp yield and longer pulp length.
차범하(Bermha Cha),장진만(Jin Man Jang),서정식(Jungsik Seo),고세현(Se-Hyun Ko),손성호(Seong Ho Son),이원식(Wonsik Lee),유우경(Woo Kyung You),이재성(Jai-Sung Lee) 한국생산제조학회 2011 한국생산제조시스템학회 학술발표대회 논문집 Vol.2011 No.4
재활용된 티타늄 수소화물 분말을 사용하여 피드스톡을 제조하고, 이를 이용하여 사출성형공정 조건을 최적화 하였다. 원료분말은 Ti chip의 재활용 공정을 통해 제조된 평균 350nm 크기의 분말을 사용하였으며, 피드스톡 제조 시 최적 분말 고상율은 68%였다. 제조된 피드스톡은 2000Pa.s 이하의 점도를 나타냈으며, 최적의 사출조건으로 미세한 부분까지 건전하게 성형된 사출체를 제조하였다. 또한 피드스톡의 열분석 결과를 이용하여 탈지 및 탈수소화 공정의 최적화를 이루었으며, 고진공하에서 소결 시 완전치밀화를 얻을 수 있었다.