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Long-term Variation of the Freezing Climate near the Han River and Seoul in Korea
오수빈,변희룡 한국지구과학회 2011 韓國地球科學會誌 Vol.32 No.7
Daily minimum temperature and freezing data of the Seoul weather station (37o34'N, 126o57'E, Songwol-dong Jongno-gu Seoul, hereinafter Songwol) and freezing data of the Han River station (37o30'N, 126o57'E, hereinafter Han River)were used to study the long-term variation of the freezing climate for Seoul, Korea, for the period of 100 years from 1907 to 2006. ‘Freezing’ of Songwol is defined that the water in outdoor fields is frozen, and ‘freezing’ of the Han River located 6 km away from Songwol is defined as the region 100 meters upstream of the second and fourth piers in the south end of the Han River Bridge is fully frozen. The mean first freezing date for Songwol was October 28, and one for Han River was December 28; these showed a late tendency, with the rate of 0.78 days decade−1 and 3.47 days decade−1, respectively. The mean annual freezing days was 159.06 days for Songwol and 50.33 days for Han River; each showed a shorter tendency,with rates of 2.01 days decade−1 and 5.24 days decade−1, respectively. All the seven no-freezing years (1960, 1971, 1972,1978, 1988, 1991, and 2006) for Han River came after 1950. The mean daily minimum temperatures of the first freezing dates for Songwol and Han River were 0.55oC and −12.22oC. The first freezing occurred after 6.43 days for Songwol and after 8.94 days for Han River with daily minimum temperature below 0oC. The annual minimum temperatures of Songwol and Han River exhibited positive correlations with the first freezing date and negative correlations with freezing days. The result shows that the freezing climate change is relevant to temperature change and is a part of overall climate change. By conducting additional studies with various methods and wider region, we will be able to monitor the freezing climate.
Efficacy of Dynamic Written Corrective Feedback on KFL Writing
오수빈,Teresa R. Bell,K. James Hartshorn,Norman W. Evans,Julie Damron 한국언어과학회 2022 언어과학 Vol.29 No.4
This study investigates the effectiveness of dynamic written corrective feedback(DWCF) on the writing of intermediate learners of Korean as a foreign language(KFL). Nineteen intermediate Korean learners at a large private university in the United States participated in this research and were divided into two groups. The treatment group(n=9) received DWCF, while the control group(n=10) did traditional types of take-home essay writing with direct feedback. Pre- and post-test results were analyzed to determine differences in linguistic accuracy, fluency, and complexity between the two groups. A mixed-model repeated measures ANOVA revealed that the treatment group's accuracy significantly increased compared to the control group, and there was no significant difference in fluency or complexity for either group. Based on the study results, DWCF is an effective teaching strategy to improve the linguistic accuracy of writings for intermediate Korean learners without negatively impacting fluency and complexity.