http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김현욱,박기성,한용구,이영구 한국정보과학회 2015 데이타베이스 연구 Vol.31 No.3
Correlated patterns from graph streams can be utilized informative knowledges in various applications. Recently, various approaches for mining correlated graphs from single graph streams are proposed. However, these approaches require long running time in multiple stream environments because inefficient processes such as a large number of subgraph isomorphism tests must be iteratively performed for each graph stream. In this paper, we propose an efficient correlated graph mining approach from multiple streams. The proposed approach perform subgraph isomorphism by using the searching tree of frequent pattern mining which is performed by correlated pattern mining. Moreover, we also propose the tree merging technique for optimizing space usage. In experiment, we show that the proposed approach can reduce execution time by up to 10~20% compared with the existing single stream based correlated graph mining method. 그래프 스트림에서 상관관계 패턴은 다양한 분야에서 유용한 지식으로 활용될 수 있다. 최근, 단일 그래프 스트림 환경에서 상관관계 패턴을 효율적으로 찾기 위한 다양한 기법들이 제안되었다. 그러나 기존의 기법들은 다중 그래프 스트림 환경에서는 매우 많은 수의 부분그래프 동형 검사와 같은 비효율적인 프로세스들을 각 스트림마다 반복적으로 수행해야 하므로 오랜 수행 시간을 요구한다. 본 논문에서는 다중 스트림 환경에서 효율적인 상관관계 그래프 마이닝 기법을 제안한다. 제안하는 기법은 각 스트림에서 수행한 빈발 부분그래프 마이닝의 탐색트리를 이용하여 효율적으로 부분그래프 동형 검사를 수행한다. 또한, 공간 사용량을 개선하기 위한 탐색트리 병합 기법도 제안한다. 실험을 통해 제안하는 기법이 기존의 단일 스트림 기반 기법보다 수행시간이 약 10~20%향상됨을 보인다.
Bacillus coagulans ATCC 8038 의 β- galactosidase 생산증진에 관한 연구
김현욱,안종건,권일경 한국낙농학회 1981 韓國酪農學會誌 Vol.3 No.2
This study was to stimulate β-galactosidase production of Bacillus coagulans ATCC8038, a thermophilic, sporeforming, and facultatively anaerobic lactose fermenting bacterium. Optimum initial pH for the enzyme production was pH 7.0 in the medium which contained 0.4% of lactose, 0.1% of peptone, 0.2 % of yeast extract, 0.7% Na-acetate. 3 H₂O and 0.03% CaCl₂.2H₂O. Potassium phospate buffer(0.05M, pH 7.0)induced the better production of β- galactosidase, and optimum concentrations of lactose, yemit extract, peptone and Na - acetate. 3H₂O in β-galactosidase production medium were found to be 0.4% , 1%, 0.1% and 0.7% respectively.
김현욱,Kim, Hyunwook 한국군사과학기술학회 2021 한국군사과학기술학회지 Vol.24 No.2
With the gradual increase in the ROK naval power, it is an undeniable fact that the time of operation in the ice-infested area will be necessary in the near future. Recently, cases of ice formation around Korean waters in wintertime have been frequently reported. However, in the case of the ROK naval vessels to date, it is a fact that the ice-strengthened perspective has not been considered from the design stage. In this study, the capability of operation in the ice-infested area of the ROK naval vessels, which did not take into account the ice-strengthened design, was reviewed through the evaluation of the vessel's structural integrity in accordance with the sea ice conditions.
김현욱,이철헌,박천욱,임용순 대한피부과학회 2001 大韓皮膚科學會誌 Vol.39 No.3
The impact of indoor allergens is greater than that of outdoor or occupational environments. Cockroaches have been demonstrated to be an etiologic factor in allergic diseases, especially in patients with lower socioeconomic classes in large urban areas. Infestations of cockroaches are largely dependent on housing conditions, and hypersensitivity is dependent on exposure. We herein report a 38-year-old man with factitious urticaria revealed strong positive reactions to crude extracts of American cockroach and German cockroach at a skin pinprick test and Western blot analysis.