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노즐의 소수성 코팅에 의한 EHD 제트의 액적 토출 현상 비교 연구
Yong-Jae Kim(김용재),Jae Yong Choi(최재용),Sang Uk Son(손상욱),Ki Cheol Ahn(안기철),Hyun Joon Keum(금현준),Suk Han Lee(이석한),Do Young Byun(변도영),Han Seo Ko(고한서) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.11
An EHD (Electro-Hydro-Dynamic) jet for electrostatic inkjet head shows advantages to print micro-size patterns using various inks because it can generate sub-micron droplets and can use highly viscous inks. Thus, many researchers in industrial fields are concerned about the EHD jet in these days. Since the basic principle of the EHD jet is to form a droplet from an apex of meniscus at the end of the nozzle, the ejection mechanism can be changed by the shape of the meniscus. The stable ejection of the droplet is greatly affected by the shape of the meniscus which is also influenced by surface characteristics of the nozzle, electric potential and ink properties. Experiments have been performed using the nozzles with hydrophilic and hydrophobic coatings in this study. The hydrophobic nozzle forms the stable droplets in wider range of the electric potential than the hydrophilic nozzle does.
金永贊(Kim Yong-Chan) 대한중국학회 2005 중국학 Vol.24 No.-
Human language is an instrument of communication. In studying language change, we must consider the role of social factors in language change. Social class, gender, typically, intrigue language change. Lately, lexical diffusionist also consider the social factors like dialect borrowing, interaction of literary form and speech form. A new trends appear in the name of Socio-historical linguistics, which study the history of language and language change in the relation of social context. In studying history of chinese langauge, we consider the role of social factors, then we will make progress in understanding history of chinese langauge.
Kim Yong-jin(金容辰),Wang So-young(王昭迎) 한국의사학회 2000 한국의사학회지 Vol.13 No.1
Through this research, it was discovered that Wang Sa-wung studied classics such as 『Nai Kyung』, and brought about new theries and prescription by combining it with his own experience. He asserted ‘Ki Hwa Chu Ki’ theory which differentiated ‘Shin Kam’ and ‘Bok Sa’ within ‘On Byung’, and this was a new theory which was not in existence before. The main reason for the recognition received by the future generation is, not only because of the substantial theoretical background but, due to the fact that his ideas were based on making practical use easier within rich near a bed experience.
金用瑞(Yong-Seo Kim) 전남대학교 생활과학연구소 1991 生活科學硏究 Vol.1 No.-
This study is to investigate the embroidery patterns on Korean costume for Yi Dynasty. A motif of embroidery payyerns on custume was a nature including animals ad plant ; a nature was recognized as an absolute ability to control a world. Depending upon this surperstitious religion, the embroidery patterns were symbolized. First, the embroidery patterns were derived from shape of animals such as a dragon for expressing an absolute power or a turtle for expecting a long life. Second, the embroidery patterns were derived from Chinese characters meaning wealth, happiness, luck or health. Beside, the embroidery patterns as well as color were differentiated based on social class : high class embroidered variously while low class embroidered with limitation. From this study, it is assumed that the embroidery pattern onamented on costume expressed mark and courtesy. It reflected sociality and culture in this time.