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Effect of Sowing Time on Buckwheat (Fagopyrum esculentum Moench) Growth and Yield in Central Korea
Gun Ho Jung,Sun-Lim Kim,Mi-Jung Kim,Sung-Kook Kim,Jeong Hwa Park,Chung-Guk Kim,Sunggi Heu 한국작물학회 2015 Journal of crop science and biotechnology Vol.18 No.4
Buckwheat (Fagopyrum esculentum MOENCH) is a traditional Korean crop that gaining global attention as a health food due to its rich nutrition. Climate change effects such as high temperature, cold weather, flooding, and drought induce plant stress, reduced production yield of upland crops. In general, buckwheat is grown during the fall season in Korea. Flooding is a severe environmental stress factor, and flooding during the early growth stage of buckwheat causes large reductions in yield. Therefore, we established optimum growth parameters to maximize buckwheat yield. The optimum temperature for harvesting of buckwheat was approximately 1,083 ~ 1,515°C. The number of growing degree days (G.D.D.) from flowering to harvest was 509 ~ 673°C. Plant hight, stem diameter, and dry matter weight were reduced as planting date was delayed (p < 0.05). We investigated buckwheat sowing time during fall, and established an optimum cropping system according to the local climate conditions in central Korea. The growth period of buckwheat cultivar ‘Yangjueol’ was approximately 56 ~ 60 days during fall, and yield was higher than that of cultivar ‘Daesan’. The results indicated that buckwheat yield in central Korea was maximized by sowing cultivar on 25th August and cultivar ‘Daesan’ on 15th August. The yield of Yangjeol sown in spring was 119 kg 10a-1, whereas the yield of Daesan sown in summer was 158kg 10a-1. The results of this study established the effects of sowing time on growth and yield in central Korea. We propose an optimum cropping system for improving quality.
Dynamic HTML 변경을 통한 Web Application Server 시스템에서의 Client Response Time 수집 방식에 관한 연구
정동기(DongKi Jung),민성기(SungGi Min) 한국정보과학회 2012 한국정보과학회 학술발표논문집 Vol.39 No.1A
World Wide Web (WWW)의 지속적인 성장으로 인해 Web Service의 Response Time을 수집하는 방식에 관한 연구가 진행되고 있다. 현재 Client Response Time을 수집하는 방식은 sniffer[1] 를 이용한 Agent 방식을 사용하고 있다. 하지만, 기존의 방식은 클라이언트 PC에 설치되어 수집하게 되므로 Agent의 설치가 쉽지 않고, 관리 또한 어려운 문제점을 갖고 있다. 이러한 문제점을 개선하기 위하여, 본 논문에서는 Web Application Server (WAS)[2] 에서의 Dynamic HTML 변경을 통해 Client에 추가적인 Application을 설치하지 않고도 Client의 Response Time을 Collection하는 방식에 대하여 제안하였다. 이를 통해, 사용자 (End-User)에게 추가적인 응용 프로그램을 설치하지 않고도 Dynamic HTML 을 이용하여 Client Response Time을 수집함과 동시에 Server에 Feedback할 수 있다.