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인터넷상에서 Ontology를 이용한 정보의 분류와 획득을 위한 지능형 에이전트의 설계
양성기,이광옥,최길환,오창윤,배상현 조선대학교 통계연구소 2000 統計硏究所論文誌 Vol.2 No.1
In this paper, we propose a new method of information gathering and text classification based on Internet. The number and diversity of information resources on the internet is increasing rapidly. As more information become available on the internet, it becomes increasingly difficult to acquire knowledge we need. A number of tools are available to help people search for the information they need. However, These tools are unable to interpret the result of their search due to lack of knowledge of domain. We need more intelligent system which facilitates personal activities of producing information such as surveying, writing paper and so on. We Implemented a system called ⅡRS(Intelligent Information Retrieval System) which helps people to acquire knowledge form information resources on the internet by gathering information and classification texts. It specifies the common background knowledge shared by the user and ⅡRS, allow ⅡRS to make inexact match between the user's request and the candidates, assigns user-oriented categories. We tested ⅡRS for gathering pages on the WWW and classification articles on the network news. The result of the experiments indicated that the ontology based approach enable us to use heterogeneous information resources on the internet.
한국 남해연안의 해표면 수온분포와 천해전선의 변동 특성
양성기 한국환경과학회 1994 한국환경과학회지 Vol.3 No.2
The distributions of sea surface temperature across the Cheju Strait and the Korea Strait have been measured by using a thermometer installed on board No.1 Cheju, a ferry that operates regularly between Pusan and Seogwipo. The data from 14 October 1991 to 15 August 1992 were analyzed in this paper. A clear temperature front is formed at the adjacent sea of Geomundo, and its position is not fixed and moves north and south. The slow northward movement of the front can easily be traced, but the southward movement from March to October is obscure. The temperature contrast in the Cheju Strait and the Korea Strait is very weak in this period. Some periodical fluctuations with a period of several tens of days are observed in the region of the temperature front from November to February. This fluctuation seems to be caused by winter heat flux exchange and the strong southeastward wind force. The result shows that continous observation of the sea surface temperature distribution across the Cheju Strait and the Korea Strait yields a good method for monitoring the presence of Tsushima Warm Current and the fluctuations of South Korea Coastal Water. The formation and structure of shelf front in the Cheju Strait and the Korea Strait was analysed based on the detailed oceanographic data observed during the period of 1990-1992. The analysis shows that well-defined fronts were formed through yearly around the Chuja Island, particularly in summer. In nature, its structure and formation position can be changed easily from year to year and by season. But, in region of the Korea Strait this front is relatively weak.
楊城基 濟州大學校 海洋資源硏究所 1984 해양과환경연구소 연구논문집 Vol.8 No.-
1983年 2月부터 11月까지 每月 三陽沿岸海域에서 調査된 海洋觀測結果로부터 三陽沿岸水의 季節別 受蘊, 鹽分 및 溶存酸素의 分布特性을 把握하였다. 三陽沿岸海域에는 年中 外洋水보다 低溫, 低鹽인 三陽 特有의 沿岸水가 形成되어 沿岸으로부터 약 1 ㎞ 外陽까지 表層을 덮으면서 擴張하고 있으며, 그 勢力은 夏季에 가장 發達하고 있다. 그러나 中 底層에서는 對馬暖流 등의 영향을 받고 있는 高溫, 高鹽의 外洋水가 沿岸으로 接近하여 沿岸水와의 사이에 현저한 前線域을 形成하고 있으나, 冬季에는 全 海域의 上·下層이 거의 均質한 混合水로 된다. 夏季에 降水 등에 의한 多量의 陸水流入으로 沿岸水는 28.5℃의 水溫과 27.9‰의 極低鹽水로 되며, 冬季에는 外洋水의 영향으로 13℃와 34.7‰을 나타내고 있다. 또한, 春 夏季의 溶存酸素量은 沿岸水이 外洋보다 약 0.3㎖/ℓ(5%) 높은 5.5∼6.5㎖/ℓ였다. 周年을 통한 鉛直混合層이 表層으로부터 沿岸域에서는 20m層까지, 外洋은 30m層까지 形成되며, 夏季의 外洋域에서는 비교적 安定된 成層海洋을 나타내고 있으나 三陽과 新村浦口의 앞 海域에는 淺海潮汐前線이 形成되고 있다. The seasonal distribution and characteristics of temperature, salinity and dissolved oxygen on the coast of Samyang were studied based on the oceanographic data compiled from February to November of 1983. The peculiar coastal sea water of the area was annually formed by the temperature and salinity lower than open sea water, and it was extended to about 1 Km off the coast, covering only the surface layer and such a phenomenon was most developed in summer, And then, the open sea water was strenuously appoached to the coast in winter, particularly, at middle and bottom layer mainly influenced by Tsushima warm current and it formed vertically homogeneous water owing to the strong wind and tidal current. In summer, the sea surface temperature and salinity of coastal water were 28.5℃ and 29.7% by inflowing of much fresh water, while in winter they were, 13℃ and 34.7%, respectively. Mean value of dissolved oxygen concentrated at surface layer of the coastal water during the period Feb. -June was 5.5-6.5㎖/ℓ, and it was higher than open sea water by about 0.3㎖/ℓ(3%). Through out the year, vertical mixing layer influenced by wind and tidal current in the coastal area was formed at depth of 20m and it was deeper at open sea area about 10m depth that of the area, but comparatively stable stratification was seen at the open sea area in summer. The shallow tidal front was found near the enterance of Samyang and Shinchon.