http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
오늘 본 자료
이성준,홍은실,민병곤,박민호,이승원,오예림,조수진,박현정 국제한국어교육학회 2020 한국어 교육 Vol.31 No.4
This study aims set a standard of Korean Speaking Test for Academic Purposes(KoSTAP). KoSTAP measures Korean speaking proficiency required for international students to carry out basic academic assignments at universities. Details of the standard setting procedure adopting modified-Angoff methods is given to provide procedural and internal evidence for the outcome from the standard setting. Three cut-scores that discriminate four performance standards are derived through a total of three standard setting rounds at a workshop participated by 16 expert panels. This study presents a reliable standard of Korean speaking proficiency for academic purposes. This standard can be applied to decision-making by test takers and stakeholders. It also discusses methodological procedures and interpretation of the results, and provides empirical information necessary for standard-setting studies. Finally, it reconfirms that the panel’s expertise are important factors influencing the outcome.
광기록에 이용되는 Te-based media에 대한 열적 해석
이성준,천석표,이현용,정홍배 한국전기전자재료학회 1995 電氣電子材料學會誌 Vol.8 No.1
We discussed the thermal analysis for a recording media with the variation of the laser pulse duration, the laser power and the temperature distribution in order to optimize the Te-based antireflection structure from the computer calculations. In the case that the radial heat diffusion is negligible, we can calculate the maximum temperature of the recording layer at the center of the spot by the Simple Model. The temperature profile of the recording layer is obtained from the Numerical Model by considering the total specific heat and the latent heat. As a result, the effect of the heat sinking acting as a thermal loss for the hole formation could be minimized by introducing the pulse with the hole formation duration(.tau.) below the thermal time constant(.tau.$_{D}$) of a dielectric layer. These requirments can be satisfied by using the dielectric thickness of the 2nd ART(Anti-Reflection Trilayer) condition or the dielectric materials with a low thermal diffusivity.y.
광기록 매질로 이용되는 Te계 ART구조의 광학적 해석
이성준,박태성,정홍배 한국전기전자재료학회 1994 電氣電子材料學會誌 Vol.7 No.3
In this study, we discussed the optical property to find the optimal condition of Te-based antireflection trilayer(ART) structure for a high density optical recording. It was found that the optical property was improved by suggesting the environmental parameters satisfied the optimum condition. As the results, the optimized(.lambda.=8.000${\AA}$.) thickness of the recording layer is 27${\AA}$, and the 1st and 2nd minimum ART conditions of dielectric layers are 1080${\AA}$, 3820${\AA}$, respectively. And the high SNR, the contrast ratio and the sensitivity are achieved by using the ART conditions.