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이성진(Seong-Jin Lee),김남군(Nam-Kun Kim),박노준(No-Jun Park),이종찬(Jong-Chan Lee),정영일(Young-Il Jung),박대희(Dae-Hee Park) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
In recent, there have been several developments in lamp technology that promise savings in electrical power consumption and improved Quality of the lighting space. Above all, the advantages of ring-shaped e1ectrodeless fluorescent lamp are the removal of internal electrodes and heating filaments that are a light-limiting factor of conventional fluorescent lamps. Therefore, the life time of ring-shaped e1ectrodeless fluorescent lamps is substantially higher than that of conventional fluorescent lamps last up to 60,000 hours. There are intended as a highly efficient replacement for the incandescent reflector lamp in many applications. In this paper, maxwell 3D finite clement analysis program (Ansoft) was used to obtain electromagnetic properties associated with the coil and nearby structures. The electromagnetic emitting properties were presented by 3D simulation software operated at 250 ㎑ and some specific conditions. In addition, the optical characteristics of ring-shaped electrodeless fluorescent lamp were measured including light flux, efficiency and color temperature for each case.
朴魯준 한양대학교 한국학연구소 1987 韓國學論集 Vol.11 No.-
This essay examines "Ssanghuajom in its various aspects "Ssanghuajom" was a song sung in the reign of King Ch'ungyol 忠烈王(1275-1308) during Koryo 高麗 dynasty (908-1392), First of all, this study inquires into the question about the auther of "Ssanghuajom" on the premise that a folksong was introduced into the royal court of Koryo and finally being formed into its present form at that time. Secondly, the article discusses both the time when the song was brought into the palace and the mode in which the song was chanted. In fact, "Ssanghuajom" was intoned in order for some of royal subjects to further dissipation of King Ch' ungyol. Thirdly, therefore, taking into account the prodigality of the monoarch and other concrete historical facts, the present work explores reasons why the ruler indulged in such a song as "Ssnghuajom." Fourthly, the study endeavors to analyze literary characteristics of this song itself through looking into the emotional attitude of the hero of the song. In conclusion, the present essay aims both at going into detailed criticism about the errors which the existing studies on "Ssanghuajom" have made and at having a correct grasp of the song.