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Author: search.filters.author.Soysangwarn, Sureeporn

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    Toward fuzzy temporal databases with temporal fuzzy linguistic terms
    (2009-12-11)
    Soysangwarn, Sureeporn
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    Chittayasothorn, Suphamit
    Fuzzy databases have been proposed by many researchers for handling fuzziness in databases. Fuzzy linguistic terms are used instead of crisp values. They find applications in areas where exact or crisp values cannot always be obtained. In another database research area, temporal databases find applications where facts which are true in the past, as well as facts that will be true in the future are recorded together with current facts. There are also cases where fuzzy databases are also temporal. In most other works, fuzzy facts are temporal or the time itself is fuzzy. This paper presents the concept of a different fuzzy database where fuzzy linguistic terms are temporal. Sample queries and meta tables for temporal similarity degrees and temporal possibility distribution are also presented. ©2009 IEEE.
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    Toward a temporal object database workbench
    (2008-12-01)
    Soysangwarn, Sureeporn
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    Chittayasothorn, Suphamit
    Nowadays the application of temporal databases in modern information systems becomes more and more popular. Time-varying information with valid time, transaction time or both are required by typical applications such as human resource management, medical information systems, agriculture and farm management. Also, the object-oriented paradigm is now the standard paradigm for software development. Object databases are widely available commercially. However, the concept of temporal database is still not included as a standard feature and the users have to implement them at the application level. This paper presents temporal object database implementation techniques. The techniques can accommodate attribute timestamping both at the object class and the association between object classes. A software tool based on the proposed techniques is developed.