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金翊相,Blake, J. 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1
The performance of fiber optic gyroscopes depends on the characteristics of a light source and the medium of propagating lightwave. The best source for fiber optic gyroscopes is known to have a large spectral bandwidth and thermal-like statistics. Sources which meet these requirements are prohibitively expensive. In this paper, we implement a low-cost DIFOG (Depolarized Interferometric Fiber Optic Gyroscope) using a cheap 1.3μm multimode semiconductor laser diode.
Korean EFL Learners’ Anxiety in the Elementary English Classroom
김익상,고경희 한국현대언어학회 2012 언어연구 Vol.28 No.2
This study examines the English anxiety of 323 Korean elementary students in order to investigate the level of anxiety, factors contributing to the anxiety, and the differences of anxiety across such backgrounds as level, grade, gender, and language experience. The data were collected using the Korean version of Foreign Language Classroom Anxiety Scale (FLCAS). The results reveal that the Korean elementary students experience significantly lower level of anxiety than the adolescent or adult subjects in other studies. In addition, the study presents four factors leading to English classroom anxiety. They include anxiety & fear, confidence & comfortableness, competition & comparison, and avoidance & apathy. The study also shows some significant group differences. The more proficient in English, the less anxious the students are. The more exposed to English-speaking world, the less anxious. Boys are more anxious than girls. Among the grades, in particular, there is a significant difference only between third and sixth grades.