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Applications of Satellite Imagery to Surveying Archeological Sites and Remains
진용옥,박경윤,Chin, Yong-Ok,Park, Kyoung-Yoon Korea Society of Satellite Technology 2007 한국위성정보통신학회논문지 Vol.2 No.2
선조의 유골 매장지와 함께 고구려 왕조($37BC{\sim}771AD$)의 산성과 이조 왕조($1392{\sim}1910AD$) 때의 봉화대와 같이 중국 동북부 지역 만주와 한반도에 산재한 유적지들의 소재지들을 확인하기 위해 위성영상을 적용했다. 이러한 유적지에 관한 정보는 여러 문헌들에서 접하게 되지만 이들 문화제의 실체들은 최근의 지역 개발 프로그램들에 의해 점차 사라지고 있는 실정이다. 이번에 답사하면서 측정한 위성위치정보(GPS) 자료를 사용하여 위성영상에서 일부 역사 유적지들의 위치를 확인해 보았다. 이들의 상세한 위치 정보는 좀 더 확인이 필요할 것으로 판단된다. Satellite imagery was applied to locating archeological sites and remains around northeastern areas of China, called as Manchuria, and Korean peninsular, such as Mountain Fortress of Goguryeo Dynasty era($37BC{\sim}771AD$), and firing torch and smoke beacon signal sites at mountain tops in Josun Dynasty era($1392{\sim}1910AD$) as well as burial sites below the ground level in the modern era. Information on archeological sites, fire posts and burial places could be found in various literatures, but real figures of such cultural assets have been disappearing due to land development programs and human activities in recent years. Some of these historical sites were identified in satellite images using GPS(Geographical Positioning System). Real locations of these sites would be further necessary to be verified.
Numerical Formula and Verification of Web Robot for Collection Speedup of Web Documents
김원 ( Weon Kim ),김영기 ( Young-ki Kim ),진용옥 ( Yong-ok Chin ) 한국인터넷정보학회 2004 인터넷정보학회논문지 Vol.5 No.6
A web robot is a software that has abilities of tracking and collecting web documents on the Internet[1]. The performance scalability of recent web robots reached the limit as the number of web documents on the Internet has increased sharply as the rapid growth of the Internet continues. Accordingly, it is strongly demanded to study on the performance scalability in searching and collecting documents on the web. "Design of web robot based on Multi-Agent to speed up documents collection" rather than "Sequentially executing Web Robot based on the existing Fork-Join method" and the results of analysis on its performance scalability is presented in the thesis. For collection speedup, a Multi-Agent based web robot performs the independent process for inactive URL ("Dead-links" URL), which is caused by overloaded web documents, temporary network or web-server disturbance, after dividing them into each agent. The agents consist of four component; Loader, Extractor, Active URL Scanner and Inactive URL Scanner. The thesis models a Multi-Agent based web robot based on "Amdahl`s Law" to speed up documents collection, introduces a numerical formula for collection speedup, and verifies its performance improvement by comparing data from the formula with data from experiments based on the formula. Moreover, "Dynamic URL Partition algorithm" is introduced and realized to minimize the workload of the web server by maximizing a interval of the web server which can be a collection target.