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변성국 ( Sung Kook Byun ),장명덕 ( Myoung Duk Jang ) 한국초등과학교육학회 2015 초등과학교육 Vol.34 No.4
The purpose of this study was to investigate elementary school students`` conceptions about the knowledge source and the mechanism about the greenhouse effect, and the relationship between the greenhouse effect and the global warming. Participants were 157 sixth graders (boy : n=79, girl : n=78) from six elementary schools located in the same city. The open-ended questionnaire was used to examine the students`` spontaneous ideas depicted by their drawings and/or writings. The results of this study are as follows: First, although there is no the content on the greenhouse effect in the elementary school curriculum document, the children in this study indicated that the main source of their knowledge about the greenhouse effect came from ‘school class’ (31.8%);Second, although the children did not take a class about the greenhouse effect itself, 14.0% of children had a relatively high level of the mental model on the phenomenon; Third, more than 90% of the children did not have the correct understanding about the relation between the greenhouse effect and the global warming.
변성국,곽문수,편종근 明知大學校 産業技術硏究所 1999 産業技術硏究所論文集 Vol.18 No.-
In this study, Green function method which calculates wave heights in harbor with constant depth is examined and the numerical model using by this method is applied. A computation of numerical model in huge harbor or sea area generally needs a long run-time. Green function method which has an effect of reducing run-time is applied to sea area in Saemankum and verified by comparing the results with those of other numerical model and hydraulic model experiment.