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Rater's subjectivity in an Oral Test
김일홍 대한언어학회 2004 언어학 Vol.12 No.3
The Linguistic Association of Korea Journal, 12(3), 151-170. This experimental study investigated the seriousness of rater's subjectivity in an oral test. The researcher analyzed the verbal test results of English native speakers, who are assumed to be reliable and competent raters only because they are from English speaking countries. The researcher correlated the raters' and inter-raters' scores to those of the examinees' ranks, and investigated the English native speakers' scoring tendencies in the process of their evaluation. From comparing the statistics for the discrepancies between the examinees' scores and rankings, this study admonishes untrained evaluators to be aware of subjectivity, and also suggests that subjective tests should not be used for examinees' rank order even though the results are statistically very significant.
Al/p - Si MIS 형 태양전지의 물성에 관한 연구
이수대,채건식,설정식,김영국,김일홍 慶南大學校 附設 基礎科學硏究所 1989 硏究論文集 Vol.1 No.-
The metal-thin insulating film-semiconductor structure is currently receiving much attention in solar cell studies. In this a MIS solar cell consisting of aluminum on single and poly silicon with an interfacial oxide layer(∼20Å) have been fabricated by vacuum evaporation method and found a good reproducibility. Recent studies show the importance of surface and interfacial oxide thickness. An interfacial of 20∼30Å is optimum and may be achieved by furnace heating to 600℃ in 800cc/min O₂flow. These cells have good rectification with forward and reverse voltage under dark condition. The best Al/p-Si Si solar cell has an open circuit voltage Voc=0.4V, short circuit current density Isc=30mA/㎠, fill factor FF=0.58 and conversion efficiency η=10% for single crystal, and Voc=0.33 V, Isc=30mA/㎠, FF=0.49 and η=5% for poly crystalline silicon substrates for 70mA/㎠ irradiation of AM₂.