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한국 주식 데이터를 이용한 서브시퀀스 매칭 방법의 효과성 평가
유승근,이상호,Yoo Seung Keun,Lee Sang Ho 한국정보처리학회 2005 정보처리학회논문지D Vol.12 No.3
기존의 서브시퀀스 매칭 방법은 검색을 효율적으로 수행하기 위한 인덱스 구성 방법에 대하여 연구하였으며, 서브시퀀스 매칭 방법의 효과성 평가를 고려하지 않았다. 본 논문은 서브시퀀스 매칭 방법의 효과성에 대하여 고려하였으며, 서브시퀀스 매칭 방법의 효과성을 평가 할 수 있는 2가지 척도를 제안한다. 한국 주식 데이터와 5가지 서브시퀀스 매칭 방법에 대하여 제안된 효과성 측정 방안을 적용하였으며, 그 결과를 분석하였다. 실험 결과, 정규화를 지원하는 서브시퀀스 매칭 방법과 스케일링과 쉬프팅 변환을 지원하는 서브시퀀스 매칭 방법이 상대적으로 효과적인 서브시퀀스를 검색하였다. Previous researches on subsequence matching have been focused on how to make indexes in order to speed up the matching time, and do not take into account the effectiveness issues of subsequence matching methods. This paper considers the effectiveness of subsequence matching methods and proposes two metrics for effectiveness evaluations of subsequence matching algorithms. We have applied the proposed metrics to Korean stock data and five known matching algorithms. The analysis on the empirical data shows that two methods (i.e., the method supporting normalization, and the method supporting scaling and shifting) outperform the others in terms of the effectiveness of subsequence matching.
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SNMP MIB-II 를 이용한 인터넷 관리 시스템의 웹 인터페이스 설계 및 구현
안성진(Ahn Seong Jin),조영욱(Cho Young Wook),유승근(Yoo Seung Keun) 한국정보처리학회 1999 정보처리학회논문지 Vol.6 No.3
This paper is aimed at defining items of analysis using SNMP MIB-II for the purpose of managing the Internet based network running on TCP/IP protocol, and then utilize these items, in conjunction with various Web technology and JAVA to design and implement a Web based interface of a management system to analyze the performance and status of the Internet. Among the required items in order to accomplish this task are utilization, interface packet transmission rate, I/O traffic ratio, and so on. Based on these items, the actual analysis is carried out by the Web interface according to the type of analysis. For instance, the interface executes the function of real-time analysis, collection processing, elementary analysis and detailed analysis. The demand of the user is fed into the Web interface which carries out a real-time analysis with the client system which in turn will eventually produce the results of the analysis. In other words, the interface acts as a mediator server for the analysis system. Furthermore, a protocol for exchange of data and messages between the server and the analysis system, the MATP protocol, was also designed. Finally, the results obtained through the system presented in this paper were displayed on screen according to the type of analysis. The system realized in this paper uses Web technology and is independent of platform and allows the user to determine the performance of Internet at his/her own host according to the selected items of analysis.
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김성덕,김광우,곽일용,김봉덕,유승근 대한마취과학회 1980 Korean Journal of Anesthesiology Vol.13 No.1
The management of patient undergoing thoracic aortic surgical procedures represents a major challenge for the anesthesiologists. Aortic cross-clamping and unclamping are particularly hszardous during the- course of the thoracic aortic operation. Proximal hypertension, myocardial ischemia and arrhythmia have been reported to occur after application of the aortic cross-clampmg. Removal of the cross-clamp often results in severe hypotension with subsequent myocardial, cerebral and renal ischemia. In this case, the patient was managed successfully using Regitine drip during the cross-clamp and slow release of clamp during unclamp, combined with slight overhydration juat before unclamp.
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