• Title/Summary/Keyword: 설계패턴검색시스템

Search Result 82, Processing Time 0.02 seconds

Threat Classification Schemes for Effective Management based on W-TMS(Wireless-Threat Management System) (W-TMS(Wireless-Threat Management System)에서의 효율적 관리를 위한 위협 분류기법)

  • Seo, Jong-Won;Jo, Je-Gyeong;Lee, Hyung-Woo
    • The Journal of the Korea Contents Association
    • /
    • v.7 no.3
    • /
    • pp.93-100
    • /
    • 2007
  • Internet had spread in all fields with the fast speed during the last 10 years. Lately, wireless network is also spreading rapidly. Also, number of times that succeed attack attempt and invasion for wireless network is increasing rapidly TMS system was developed to overcome these threat on wireless network. Existing TMS system supplies active confrontation mechanism on these threats. However, existent TMS has limitation that new form of attack do not filtered efficiently. Therefor this paper proposes a new method that it automatically compute the threat from the imput packets with vector space model and detect anomaly detection of wireless network. Proposed mechanism in this research analyzes similarity degree between packets, and detect something wrong symptom of wireless network and then classify these threats automatically.

An Optimal Design Method for the Multidimensional Nested Attribute Indexes (다차원 중포 속성 색인구조의 최적 설계기법)

  • 이종학
    • Journal of Korea Multimedia Society
    • /
    • v.6 no.2
    • /
    • pp.194-207
    • /
    • 2003
  • This paper presents an optimal design methodology for the multidimensional nested attribute index (MD-NAI) that uses a multidimensional index structure for indexing the nested attributes in object databases. The MD-NAI efficiently supports complex queries involving both nested attributes and class hierarchies, which are not supported by the nested attribute index using one-dimensional index structure such as $B^+$-tree. However, the performance of the MD-NAI is very degraded in some cases of user's query types. In this paper, for the performance enhancement of the MD-NAI, we first determine the optimal shape of index page region by using the query information about the nested predicates, and then construct an optimal MD NAI by applying a region splitting strategy that makes the shape of the page regions of the MD-NAI as close as possible to the predetermined optimal one. For performance evaluation, we perform extensive experiments with the MD-NAI using various types of nested predicates and object distribution. The results indicate that our proposed method builds optimal MD-NAI regardless of the query types and object distributions. When the interval ratio of a three-dimensional query region is 1:16:236, the performance of the proposed method is enhanced by as much as 5.5 times over that of the conventional method employing the cyclic splitting strategy.

  • PDF