• Journal of the Speleological Society of Korea
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• no.79
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• pp.31-39
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• 2007

대금굴은 3년여 동안 암석 틈새를 들춰내며 150m쯤 물길을 찾아 들어가, 다시 18m의 수직동굴로 하강하여 좁은 틈새를 비집고 70m를 들어가는 악전고투의 탐사 끝에 2003년 동굴을 발견했다. 이렇게 3년여 동안 발굴된 대금굴은 또다시 4년여 동안의 모노레일 설치와 동굴내부 관람로 및 조명설치 등의 공사를 거쳐 2097년 6월 5일 일반 공개를 하였다. 총 길이 610m 중 4분의 3정도는 동굴 입구로 향하는 산길이고 나머지는 동굴 안쪽 길이다. 승강장에서 동굴 내부 140m에 설치된 "대금역"까지는 약 7분이 걸린다. 운전석이 없고 자동으로 운행하기 때문에 앞뒤로 동굴 안팎이 잘 보인다. 동굴 내부에 열차를 타고 들어가는 건 분명 이색체험이다. 그러나 모노레일 내부에 울리는 비발디의 "사계"라든지 동굴 벽에 붙여 놓은, 네온 빛에 가까운 퍼런 빛깔의 조명이 조용한 동굴 감상에 역효과가 초래될 수도 있다.

• Korean Journal of Heritage: History & Science
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• v.53 no.1
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• pp.52-63
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• 2020

This study was conducted in order to evaluate the characteristics of air temperature fluctuation inside the Daegeumgul, Ondaldonggul, and Seongnyugul Caves, which are the most representative limestone caves in Korea, and also to assess the effects of air temperature on cave temperature. Temperature was measured hourly at three sites in Daegeumgul, Ondaldonggul, and Seongnyugul Caves from April 13 to June 25, 2019. Additionally, air temperature data for the areas around the caves was provided by the Meteorological Administration. Using this collected data, the basic statistical measure of fluctuation characteristics over time was ascertained, and time series analyses were performed. Wide variation of temperature was exhibited in the order of the cave entrance, the cave water inflow point, and the midpoint. Cave temperature was observed to increase gradually during the study period. There was a vast range in temperature at the Daegeumgul station located approximately 150 m outside the cave, but it remained nearly constant beyond the midpoint. Although the effect of air temperature was not significant due to the influence of visitors, the effect of air temperature on cave temperature gradually decreased from the entrance to the interior. At Ondaldonggul, there was a wide range in temperature recorded at the entrance due to the influence of air temperature, but it stayed almost constant in the interior. However, at the site where cave water flows into the cave, temperature was influenced by the cave water temperature. At Seongnyugul, there was a distinct fluctuation in temperature recorded at the cave entrance, while the middle of the cave remained nearly constant. Temperature fluctuated due to the air temperature at the entrance, while at the middle of the cave, measurements were expected to be affected to a greater extent by the lake water temperature than by the air temperature. However, this pattern was not observed. According to the time series analysis results, in all caves, fluctuations of air temperature affected cave temperature after approximately one hour. Cave size and structure, water presence, the entrance's size and shape, air flow, and visitor patterns can all influence cave temperature. Therefore, consideration of these factors is very important in the pursuit to clearly understand cave temperature characteristics.

• International Commerce and Information Review
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• v.4 no.1
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• pp.149-172
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• 2002

Within this thesis, the review and classification for research on Internet trade is mainly presented. It focused on subjects, Internet trade steps and research methodologies. One hundred eighty thesis topics were reviewed and all of this investigation has been completed between 1994 and November 2001. We found that Internet trade strategies are researched 19%, Global Internet law 7% and Contacts custom 5%. However, Internet trade theory, Electronic money, Internet trade dispute researches are founded very small portion on subjects review. Researches about Internet trade are recommended that perform though interdisciplinary research and various studies. Moreover, the research on Internet trade has to be based on the study on offline international trades and theories.