Database Engineering and Applications, 1999. IDEAS '99. International Symposium Proceedings

4-4 Aug. 1999

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  • Proceedings. IDEAS'99. International Database Engineering and Applications Symposium (Cat. No.PR00265)

    Publication Year: 1999
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    Freely Available from IEEE
  • Author index

    Publication Year: 1999, Page(s):466 - 467
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    Freely Available from IEEE
  • Site-locking protocol for global concurrency control in multidatabase systems

    Publication Year: 1999, Page(s):380 - 384
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (92 KB)

    Much research into managing global transactions in multidatabase systems (MDBS) has been proposed to solve problems of ensuring global serializability. In these methods, a few opportunities are provided to the global transaction to execute concurrently. We concentrate our attention on 1) maintaining a consistent database state that is defined by global integrity constraints, and 2) investigation i... View full abstract»

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  • The scalability of an object descriptor architecture OODBMS

    Publication Year: 1999, Page(s):370 - 377
    Cited by:  Patents (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (108 KB)

    An object database management system (OODBMS) has been often criticized for its alleged insufficient scalability for a large-scale production system. We investigated the scalability issue on a commercial OODBMS with a focus on the scalability with respect to the number of objects. Our approach was a benchmark experiment using the loading and indexing of SGML text documents as an application. The a... View full abstract»

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  • Between well-founded semantics and stable model semantics

    Publication Year: 1999, Page(s):270 - 278
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (224 KB)

    Using fixpoint operations, we define a new semantics for Datalog programs with negation. The semantics is deterministic. Given a program Δ, the model of Δ in the new semantics includes the well-founded model, and is included in all stable models, if such models exist. In particular, there exist programs that have no stable models, or their well-founded model is empty, but their model i... View full abstract»

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  • On a buzzword “extensibility”-what we have learned from the ORIENT project?

    Publication Year: 1999, Page(s):360 - 369
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (88 KB)

    To meet the ever challenging requirements of today's applications, both database research and industry are engaged in adding new features to database management systems (DBMSs). As a major effort in this direction, object-relational DBMSs (ORDBMSs) are becoming more and more popular due to their extensibility, i.e., allowing user-defined facilities to be used in the same way as built-in ones. Insp... View full abstract»

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  • The challenges of genome information management: a practical experience

    Publication Year: 1999, Page(s): 465
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (8 KB)

    First Page of the Article
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  • iWebDB-Web site administration based on object-relational database technology

    Publication Year: 1999, Page(s):92 - 97
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (40 KB)

    Since the emergence of the World Wide Web in the year 1990, the number of accessible Web servers, HTML pages, and thereby the amount of accessible data have increased dramatically. Consequently many people around the world are engaged in maintaining a Web server and its content. While creating HTML pages is getting more and more simple, the administration of a Web site is still a time consuming an... View full abstract»

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  • Safe database queries with external functions

    Publication Year: 1999, Page(s):260 - 269
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (168 KB)

    Considers the theory of database queries with functions in the complex-value data model. The notion of a syntactic criterion, called “embedded allowed”, for queries which guarantee embedded domain independence, is generalized for this model. We show that all “embedded allowed” calculus (or fixpoint) queries are external function domain-independent and continuous. We also de... View full abstract»

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  • Incremental maintenance of nested relational views

    Publication Year: 1999, Page(s):197 - 205
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (332 KB)

    Incremental view maintenance techniques are required for many new types of data models that are being increasingly used in industry. One of these models is the nested relational model that is used in the modelling of complex objects in databases. In this paper, we derive a group of expressions for incrementally evaluating query expressions in the nested relational model. We also present an algorit... View full abstract»

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  • Towards an architecture for reactive systems using an active real-time database and standardized components

    Publication Year: 1999, Page(s):351 - 359
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (100 KB)

    Component-based concepts are being increasingly used in software design since they allow high-quality software to be generated within a short time and hence at low costs. By contrast, component technologies haven't yet provided the means of composing software from components without additional programming. The reason for this lies in the combined transfer of control and data flow and the fact that... View full abstract»

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  • The MIDAS data-mining project at Stanford

    Publication Year: 1999, Page(s):460 - 464
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (144 KB)

    The article summarizes recent research into data-mining techniques that are in progress at Stanford: 1. The Google search engine: beating Yahoo et al. at their own game. 2. Query flocks: generalizing association rules/market baskets in a query precompiler that uses a relational DBMS effectively. 3. Synthesizing knowledge from the Web: exploiting the Web's redundancy to extract data automatically. ... View full abstract»

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  • 2D topological and direction relations in the world of minimum bounding circles

    Publication Year: 1999, Page(s):239 - 247
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (188 KB)

    The representation and processing of spatial queries is important in numerous application domains in the areas of computer-aided design, multimedia databases, spatial and geographic applications. A sample query type in these applications is to find objects that satisfy a specific direction or topological relation with respect to a given object. Due to the large size of these databases and the comp... View full abstract»

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  • ISIS: a semantic mediation model and an agent based architecture for GIS interoperability

    Publication Year: 1999, Page(s):87 - 91
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (100 KB)

    The diversity of spatial information systems promotes the need to integrate heterogeneous spatial or geographic information systems (GIS) in a cooperative environment. The paper describes the research project ISIS (Interoperable Spatial Information System) which is a semantic mediation approach to support GIS interoperability. Its key characteristic is a dynamic resolution of semantic conflicts wh... View full abstract»

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  • Cost-benefit analysis of Web bag in a Web warehouse

    Publication Year: 1999, Page(s):34 - 42
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (188 KB)

    Sets and bags are closely related structures and have been studied in relational databases. A bag is different from a set in that it is sensitive to the number of times an element occurs, while a set is not. In this paper, we introduce the concept of a Web bag in the context of a World Wide Web warehouse called WHOWEDA (WareHouse Of WEb DAta) which we are currently building. Informally, a Web bag ... View full abstract»

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  • Concurrent maintenance of views using multiple versions

    Publication Year: 1999, Page(s):254 - 258
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (52 KB)

    Materialized views in data warehouses are maintained incrementally, for reasons of efficiency, to present the latest updates to the users. These views are used by many warehouse readers (users) to execute OLAP queries by running several reader sessions and these views are maintained periodically by maintenance transactions. Therefore, there is an inherent problem of maintaining these views while t... View full abstract»

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  • A model for deferred view maintenance

    Publication Year: 1999, Page(s):188 - 196
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (580 KB)

    Presents a model for deferred maintenance of object-oriented views. Queries that define views are implemented as methods that are invoked to compute the corresponding views. A deferred update reflects to a view only those related modifications that were introduced into the database while that view was inactive. A view is updated by considering modifications performed within all classes along the i... View full abstract»

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  • Improving OLAP performance by multidimensional hierarchical clustering

    Publication Year: 1999, Page(s):165 - 177
    Cited by:  Papers (8)  |  Patents (17)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (184 KB)

    Data warehousing applications cope with enormous data sets in the range of Gigabytes and Terabytes. Queries usually either select a very small set of this data or perform aggregations on a fairly large data set. Materialized views storing pre-computed aggregates are used to efficiently process queries with aggregations. This approach increases resource requirements in disk space and slows down upd... View full abstract»

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  • The role of meta-objects and self-description in an engineering data warehouse

    Publication Year: 1999, Page(s):342 - 350
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (596 KB)

    As enterprises, data and functions become increasingly complex and distributed the need for information systems to be both customisable and interoperable also increases. Large scale engineering and scientific projects demand flexibility in order to evolve over time and to interact with external systems (both newly designed and legacy in nature) while retaining a degree of conceptual simplicity. Th... View full abstract»

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  • Efficient mining for association rules with relational database systems

    Publication Year: 1999, Page(s):148 - 155
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (116 KB)

    With the tremendous growth of large scale data repositories, a need for integrating the exploratory techniques of data mining with the capabilities of relational systems to efficiently handle large volumes of data has now risen. We look at the performance of the most prevalent association rule mining algorithm-Apriori with IBM's DB2 Universal Database system. We show that a multi-column (MC) data ... View full abstract»

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  • Issues in multimedia database management

    Publication Year: 1999, Page(s):452 - 459
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (84 KB)

    Multimedia information systems pose significantly different data management requirements than traditional database applications. Some of the multimedia data management issues have been well studied by the database community, but there are other problems that have been largely ignored. In this paper, the generality of multimedia database management is considered and a brief and personal overview of... View full abstract»

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  • Hash-based symmetric data structure and join algorithm for OLAP applications

    Publication Year: 1999, Page(s):231 - 238
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (508 KB)

    The star schema is often used in dimensional approaches applied to OLAP applications. The fact table in the star schema typically contains a huge amount of data. When some of the dimension tables are also very large, it may take too much time and storage to join the fact table with these dimension tables. The performance of the join algorithm becomes critical under such a condition. The fluent joi... View full abstract»

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  • Transactional coordination agents for composite systems

    Publication Year: 1999, Page(s):321 - 331
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (116 KB)

    Composite systems are collections of autonomous, heterogeneous and distributed software applications. In these systems, data dependencies are continuously violated by local operations, and therefore coordination processes are necessary to guarantee overall correctness and consistency. Such coordination processes must be endowed with some form of execution guarantees, which require the participatin... View full abstract»

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  • Self-organization of distributed document archives

    Publication Year: 1999, Page(s):128 - 136
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (200 KB)

    Document archives may be regarded as a perfect application arena for unsupervised neural networks because many of the operations computers have to perform on text documents are classification tasks based on noisy patterns. The “noise” originates from the known inaccuracy of mapping free-form natural language to an indexing vocabulary representing the contents of the documents. We descr... View full abstract»

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  • SHB: a strategic hierarchy builder for managing heterogeneous databases

    Publication Year: 1999, Page(s):82 - 86
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (72 KB)

    The paper presents a methodology based on data model translation for the management of interoperable information systems. The key feature of this solution are: 1) a set of abstract metatypes that capture the characteristics of various modeling concepts; and 2) the organization of the metatypes in a generalization hierarchy to allow unification and correlation of data models. Description logic form... View full abstract»

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