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Author: search.filters.author.Chau, Vo Thi NgocSubject: search.filters.subject.Metadata

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    A conceptual schema-based temporal meta database schemas generation technique for 3D objects
    (2010-01-01)
    Chau, Vo Thi Ngoc
    ;
    Chittayasothorn, Suphamit
    In this paper, a temporal meta database for three-dimensional (3D) objects whose properties and relationships are supported by valid time is introduced. Based on our proposed temporal object-oriented conceptual schema model, a conceptual schema of the temporal meta database can be generated from a 3D graphical data source and other particular application requirements. Based on our proposed temporal object relational data model with attribute timestamping, logical schemas of the temporal meta database can be systematically and automatically generated from the conceptual schema. From the temporal meta database, non-temporal/temporal metadata about temporal 3D objects are available for temporal information system users. Convenient access using database languages such as SQL can be performed. Queries over 3D objects using a temporal object relational SQL are demonstrated. © 2009 Springer-Verlag London Limited.
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    Temporal 3D graphical data management from a database perspective
    (2009-11-16)
    Chau, Vo Thi Ngoc
    ;
    Chittayasothorn, Suphamit
    According to recent advances in computer science and engineering, three dimensional (3D) graphical data is of growing interest in many application areas. In this paper, a data management technique is proposed to handle 3D graphical data with the time dimension from a database perspective. Different from the existing works, our technique deals with 3D graphical data in all of the three various aspects: the visual aspect for the 3D graphical data part, the semantic aspect for the metadata part, and especially the temporal aspect for changes over the time. As a result, 3D graphical data can be managed properly with semantics and time. Therefore, many front-end applications can conveniently have access to them at both graphical and semantic data levels for sharability and reusability. © 2009 IEEE.