• 대한원격탐사학회지
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• 제34권1호
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• pp.17-24
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• 2018

Grounding line of a glacier or ice shelf where ice bottom meets the ocean is sensitive to changes in the polar environment. Recent rapid changes of grounding lines have been observed especially in southwestern Antarctica due to global warming. In this study, ERS-1/2 and Sentinel-1A Synthetic Aperture Radar (SAR) image were interferometrically acquired in 1996 and 2015, respectively, to monitor the movement of the grounding line in the western part of Ronne Ice Shelf near the Antarctic peninsula. Double-Differential Interferometric SAR (DDInSAR) technique was applied to remove gravitational flow signal to detect grounding line from the interferometric phase due to the vertical displacement of the tide. The result showed that ERS-1/2 grounding lines are almost consistent with those from Rignot et al. (2011) which used the similar dataset, confirming the credibility of the data processing. The comparison of ERS-1/2 and Sentinle-1A DDInSAR images showed a grounding line retreat of $1.0{\pm}0.1km$ from 1996 to 2015. It is also proved that the grounding lines based on the 2004 MODIS Mosaic of Antarctica (MOA) images and digital elevation model searching for ice plain near coastal area (Scambos et al., 2017), is not accurate enough especially where there is a ice plain with no tidal motion.

• 정보교육학회논문지
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• 제8권2호
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• pp.203-209
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• 2004

본 연구는 가상현실 언어인 VRML과 자바 애플릿을 이용하여 학습자(초등학교 고학년, 중학교 학생)에게 흥미를 줄 수 있는 향상된 학습 방법을 제공하고자 한다. 과학 교육의 현실적인 어려움을 극복하고자 VRML을 이용한 3차원 애니메이션 기능을 사용한다. 이를 통해, 우리 생활 속에 친숙한 기계 구조와 원리를 학습시키고 과학 학습의 흥미를 갖도록 한다. 앞으로 이와 같은 방법은 과학 교육의 효율성을 향상시키는데 널리 활용될 수 있다.