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Database Systems for Advanced Applications, 1999. Proceedings., 6th International Conference on

Date 21-21 April 1999

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  • Proceedings. 6th International Conference on Advanced Systems for Advanced Applications

    Publication Year: 1999
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    Freely Available from IEEE
  • Research and development of advanced database systems for integration of media and user environments

    Publication Year: 1999, Page(s):3 - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (23 KB)

    First Page of the Article
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  • Author index

    Publication Year: 1999, Page(s):355 - 356
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    Freely Available from IEEE
  • Maintenance of placement dependency in distributed multidatabase systems

    Publication Year: 1999, Page(s):339 - 346
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    Placement dependency is a data allocation constraint in distributed multidatabase systems. It has been shown that this constraint can be used to speed up query processing. However, update operations may violate placement dependency. It is important to support the maintenance of placement dependency in distributed multidatabase systems. We present a method for maintaining placement dependency. We d... View full abstract»

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  • Materialized view maintenance using version numbers

    Publication Year: 1999, Page(s):263 - 270
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    A data warehouse stores materialized views over data from one or more sources in order to provide fast access to the integrated data, regardless of the availability of the data sources. We define a new compensation algorithm that is used in removing the anomalies, caused by interfering updates at the base relations, of incremental computation for updating the view. Unlike existing methods on view ... View full abstract»

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  • Design and implementation of a structured information retrieval system for SGML documents

    Publication Year: 1999, Page(s):81 - 88
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (164 KB)

    SGML has become very popular as the source language of structured documents because its usefulness has already been verified by the CALS (Commerce At Light Speed) project. Traditional information retrieval systems (IRSs), however, cannot support retrieval based on the logical structure of SGML documents. In this paper, we design a structured IRS (SIRS) supporting both content-based retrieval and s... View full abstract»

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  • Multiple dynamic view support for cooperative work

    Publication Year: 1999, Page(s):331 - 338
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (788 KB)

    VIEW Media is a cooperative hypermedia system, which supports cooperative work utilizing hypermedia documents. It provides fundamental functions for cooperative work support systems and enables developers to construct various groupware such as distributed presentation systems, education systems, conference systems, and so forth. This system provides a powerful and flexible mechanism of customizati... View full abstract»

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  • Π-web join in a web warehouse

    Publication Year: 1999, Page(s):255 - 262
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (136 KB)

    With the enormous amount of data stored in the World Wide Web, it is increasingly important to design and develop powerful web warehousing tools. The key objective of our web warehousing project, called WHOWEDA (Warehouse of Web Data), is to design and implement a web warehouse that materializes and manages useful information from the web. We introduce the concept of Π-web join in the context o... View full abstract»

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  • WebView: a tool for retrieving internal structures and extracting information from HTML documents

    Publication Year: 1999, Page(s):71 - 80
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    HTML is a well-accepted and widely used language for creating platform-independent documents to be posted on the Web, and HTML documents are semistructured in nature according to the HTML specification. We propose a tool, called WebView, which constructs the semistructured data graph (SDG) of an HTML document H to capture the internal structure of data embedded in H and in its (in)directly linked ... View full abstract»

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  • QEM: a scheduling method for wireless broadcast data

    Publication Year: 1999, Page(s):135 - 142
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB)

    In mobile distributed systems the data on air can be accessed by a large number of clients. This paper describes the way clients access the wireless broadcast data with short latency. We define and analyze the problem of wireless data scheduling and we propose a measure, named QueryDistance (QD), which represents the degree of coherence for the data set accessed by a query. We give a practically u... View full abstract»

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  • An adaptable constrained locking protocol for high data contention environments

    Publication Year: 1999, Page(s):321 - 328
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB)

    Multiversions of data are used in database systems to increase concurrency and to provide efficient recovery. Data versions improve the concurrency by allowing the concurrent execution of non-conflicting read-write lock requests on different versions of data in an arbitrary fashion. A transaction that accesses a data item version which is later diagnosed to lead to an incorrect execution, is abort... View full abstract»

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  • A restructuring method for the concurrent B+-tree based on semantic consistency

    Publication Year: 1999, Page(s):229 - 236
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1524 KB)

    As the B-tree index could be a performance bottleneck in database systems, concurrent B-tree algorithms have been intensively studied to improve concurrency of B-tree accesses in the literature. We propose a new concurrent B+-tree algorithm for high concurrency and an efficient tree restructuring method. Because the proposed method of tree restructuring always preserves a semantic consi... View full abstract»

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  • Mining exception instances to facilitate workflow exception handling

    Publication Year: 1999, Page(s):45 - 52
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1348 KB)

    The importance of exception handling within the context of workflow management has been widely recognized. While some exceptions are expected at design time and thus can be incorporated into the workflow design via some flexible mechanism, others are totally unexpected. Previous work in handling unexpected workflow exceptions focuses on the run-time support to, for example, allow the rollback of s... View full abstract»

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  • FRAGTIQUE: an OO distribution design methodology

    Publication Year: 1999, Page(s):283 - 290
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    We present an OO distribution design methodology based on a ponderated graph called Class Dependency Graph (CDG) which captures structural relationships and query usage frequencies of an OO database. We characterize and select a set of methods for which parallel execution can be optimized. These methods determine the partitioning strategy and are used to partition the CDG into a set of partition t... View full abstract»

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  • Materialized view evolution support in data warehouse environment

    Publication Year: 1999, Page(s):247 - 254
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (104 KB)

    As a sufficiently abstract level, the data in the data warehouse can be seen as a set of materialized views, where the base data resides at the information sources. These materialized views are designed based on the users' requirements (e.g., frequently asked queries). However, a data warehouse is a dynamic environment, i.e., when user query requirement changes, the existing materialized views sho... View full abstract»

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  • An approach for generating file interfaces

    Publication Year: 1999, Page(s):61 - 68
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (168 KB)

    This paper deals with generating interfaces to files. The presented approach consists of two main parts: first, describing the file structure in an object-oriented manner, and second, manipulating the files by means of either SQL or ODMG 2.0 object manipulation and querying. The principle of the approach is centered around a powerful specification language. Using this language, the structure of fi... View full abstract»

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  • Feature reduction for neural network based text categorization

    Publication Year: 1999, Page(s):195 - 202
    Cited by:  Papers (28)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    In a text categorization model using an artificial neural network as the text classifier scalability is poor if the neural network is trained using the raw feature space since textural data has a very high-dimension feature space. We proposed and compared four dimensionality reduction techniques to reduce the feature space into an input space of much lower dimension for the neural network classifi... View full abstract»

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  • Real-time transaction management in mobile computing systems

    Publication Year: 1999, Page(s):127 - 134
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    In order to respond to real-time data access requirements of the underlying applications, mobile computing systems need to be supported by real-time DBMSs. In this paper we discuss critical issues related to real-time transaction management in mobile computing systems. We identify some open research problems and suggest directions for future work on possible solution methods. We also present a mob... View full abstract»

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  • An effective Boolean algorithm for mining association rules in large databases

    Publication Year: 1999, Page(s):179 - 186
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    In this paper, we present in effective Boolean algorithm for mining association rules in large databases of sales transactions. Like the a priori algorithm, the proposed Boolean algorithm mines association rules in two steps. In the first step, logic OR and AND operations are used to compute frequent itemsets. In the second step, logic AND and XOR operations are applied to derive all interesting a... View full abstract»

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  • Video description model based on prototype-instance model

    Publication Year: 1999, Page(s):109 - 116
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    Current video database systems are able to manipulate syntactic aspects of temporal media like video and audio. However, few of these systems are able to manipulate video information according to its semantic content. Furthermore, manually describing video content is tedious and not practical for the video data due to the temporal, spatial, and massive characteristic of the video, meanwhile conten... View full abstract»

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  • Early separation of filter and refinement steps in spatial query optimization

    Publication Year: 1999, Page(s):161 - 168
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (156 KB)

    The spatial query has been processed in two steps, the filter step and the refinement step, due to the large volume and high complexity of the spatial data. However, this approach has been considered only in the query execution phase after completion of the query optimization phase. This paper presents query optimization strategies which take the characteristics of spatial databases into account. ... View full abstract»

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  • Recovery in distributed extended long-lived transaction models

    Publication Year: 1999, Page(s):313 - 320
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    We address the recovery and the rollback problem in distributed collaborative transactions. We propose a solution to the problem in a generalized ARIES framework. We modified its existing data structures and provided additional data structures for recovery of distributed extended long-lived transactions. In the proposed model the transactions communicate and collaborate only by exchanging messages... View full abstract»

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  • P-tree: a B-tree index for lists

    Publication Year: 1999, Page(s):221 - 228
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (140 KB)

    The high frequency of applications involving large, ordered, nested lists suggests that list is the “next most” natural data type after set. A list differs from a set through positioning and nesting elements within the list. Directly supporting such position-related operations will greatly improve the performance of database systems targeting at the above applications. Unlike other att... View full abstract»

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  • An interactive classification of Web documents by self-organizing maps and search engines

    Publication Year: 1999, Page(s):35 - 42
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    We propose an effective classification view mechanism for hypertext data such as Web documents based on Kohonen's self-organizing map (SOM) and search engines. Web documents collected by search engines are automatically classified by SOM and the obtained SOMs are incrementally modified according to the interaction between users and SOMs. At present, various search engines are designed to retrieve ... View full abstract»

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  • A middleware implementation of active rules for ODBMS

    Publication Year: 1999, Page(s):347 - 354
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (84 KB)

    Throughout many research and development projects for active rule systems, active rules are implemented with different syntax and semantics. It becomes one of the stumbling blocks to apply active database systems especially in networked heterogeneous multidatabase environments. Utilizing the recent development of CORBA and ODMG standards, a middleware approach to provide active rule systems for he... View full abstract»

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