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Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337)

23-26 March 1999

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  • Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337)

    Publication Year: 1999
    Request permission for commercial reuse | PDF file iconPDF (412 KB)
    Freely Available from IEEE
  • Que Sera, Sera: The Coincidental Confluence of Economics, Business, and Collaborative Computing

    Publication Year: 1999, Page(s):2 - 3
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (192 KB)

    Summary form only given. This presentation is an exploration of the next generation computing based on the confluence of radical and coincidental changes in economics, business, and technology. Whereas technology is a key enabler of change, it is and is the servant, not the master. Without a depth of understanding of this enabling role and the content in which technology serves, technology can be ... View full abstract»

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  • Database as an application integration platform

    Publication Year: 1999
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (37 KB)

    Summary form only given as follows. This paper describes critical features that should be provided by any platform for application integration. These features include message queuing, message filtering and data transformation. The integration of these features with a database makes for a powerful platform for application integration that is scalable, reliable, available and manageable. View full abstract»

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  • Business objects and application integration

    Publication Year: 1999
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (54 KB)

    Summary form only given as follows. Application integration addresses the need for diverse applications to be able to communicate with each other across application boundaries and across platform boundaries. Business objects extend the type system of relational databases to deal with the needs of application integration. The requirements of business application integration include event-based info... View full abstract»

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  • Policies in a resource manager of workflow systems: modeling, enforcement and management

    Publication Year: 1999
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (64 KB)

    Summary form only given. We are interested in Workflow Management Systems (WFMS), and particularly, in Resource Management (RM) of WFMS. A WFMS consists of coordinating executions of multiple activities, instructing who (resource) do what (activity) and when. The "when" part is taken care of by the workflow engine which orders the executions of activities based on a process definition. The "who" p... View full abstract»

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  • Data Mining from an Al Perspective

    Publication Year: 1999, Page(s): 186
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (75 KB)

    Summary form only given, as follows. Data Mining, or Knowledge Discovery in Databases as it is also called, is claimed as an offspring by three disciplines: databases, statistics, and the machine learning subfield of artificial intelligence. (The term originated in statistics with distinctly pejorative overtones - data mining was characterized as fossicking in data without a guiding model.) Statis... View full abstract»

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  • Fast approximate query answering using precomputed statistics

    Publication Year: 1999
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (10 KB)

    Summary form only given. The last few years have witnessed a significant increase in the use of databases for complex data analysis (OLAP) applications. These applications often require very quick responses from the DBMS. However, they also involve complex queries on large volumes of data. Despite significant improvement in database support for OLAP over the last few years, most DBMSs still fall s... View full abstract»

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  • Data warehouse maintenance under concurrent schema and data updates

    Publication Year: 1999
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (87 KB)

    Summary form only given. Data warehouses (DW) are built by gathering information from several information sources (IS) and integrating it into one repository customized to users' needs. ISs are typically owned by different information providers and hence are independent and autonomous. This implies they will update their data and schemas independently and without any concern for how this may affec... View full abstract»

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  • Author index

    Publication Year: 1999, Page(s):646 - 648
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    Freely Available from IEEE
  • Mobile agents for WWW distributed database access

    Publication Year: 1999, Page(s):228 - 237
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The popularity of the Web as a universal access mechanism for network information has created the need for developing Web based DBMS client/server applications. However, the current commercial applet based methodologies for accessing database systems offer limited flexibility, scalability and robustness. We propose a new framework for Web based distributed access to database systems based on Java ... View full abstract»

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  • Efficient time series matching by wavelets

    Publication Year: 1999, Page(s):126 - 133
    Cited by:  Papers (86)  |  Patents (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    Time series stored as feature vectors can be indexed by multidimensional index trees like R-Trees for fast retrieval. Due to the dimensionality curse problem, transformations are applied to time series to reduce the number of dimensions of the feature vectors. Different transformations like Discrete Fourier Transform (DFT) Discrete Wavelet Transform (DWT), Karhunen-Loeve (KL) transform or Singular... View full abstract»

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  • A hypertext database for advanced sharing of distributed web pages

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

    There are many learning systems using their web pages. These systems provide not only contents of the web pages but also the embedded links on them for learners. In these systems, since the learners can use all the hyperlinks embedded on the web page, they can visit unnecessary/invalid web pages for learning. In order to use web pages as instructional materials, authors of instructional materials ... View full abstract»

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  • Fast approximate search algorithm for nearest neighbor queries in high dimensions

    Publication Year: 1999
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (32 KB)

    We present a fast approximate nearest neighbor (NN) search index structure called the AB-tree, which uses heuristics to decide whether or not to access a node in the index tree based on the intersecting angle and the weight of the node. The goal of the NN search algorithm presented is to decrease unnecessary node accesses in the search due to overlap among bounding regions in existing index struct... View full abstract»

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  • Data warehouses evolution: trade-offs between quality and cost of query rewritings

    Publication Year: 1999
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (16 KB)

    Query rewriting with relaxed semantics has been proposed as a means of retaining the validity of a data warehouse (i.e., materialized queries) in a changing environment. Attributes in the query interface can be classified as essential or dispensable (if it cannot be retained) according to the query definer's preferences. Similarly, preferences for query extent can be specified, for example, to ind... View full abstract»

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  • On the semantics of complex events in active database management systems

    Publication Year: 1999, Page(s):392 - 399
    Cited by:  Papers (32)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    Active database management systems have been developed for applications needing an automatic reaction in response to certain events. Events can be simple in nature or complex. Complex events rely on simpler ones and are usually specified with the help of operators of an event algebra. There are quite a few papers dealing with extensions of existing event algebras. However, a systematic and compreh... View full abstract»

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  • STING+: an approach to active spatial data mining

    Publication Year: 1999, Page(s):116 - 125
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    Spatial data mining presents new challenges due to the large size of spatial data, the complexity of spatial data types, and the special nature of spatial access methods. Most research in this area has focused on efficient query processing of static data. This paper introduces an active spatial data mining approach which extends the current spatial data mining algorithms to efficiently support use... View full abstract»

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  • Improving RAID performance using a multibuffer technique

    Publication Year: 1999, Page(s):79 - 86
    Cited by:  Papers (3)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (108 KB)

    RAID (redundant array of inexpensive disks) offers high performance for read accesses and large writes to many consecutive blocks. On small writes, however, it entails large penalties. Two approaches have been proposed to address this problem. The first approach records the update information on a separate log disk, and only brings the affected parity blocks to the consistent state when the system... View full abstract»

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  • Integrating light-weight workflow management systems within existing business environments

    Publication Year: 1999, Page(s):286 - 293
    Cited by:  Papers (5)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1868 KB)

    Workflow management systems (WfMSs) support the efficient, largely automated execution of business processes. However, using a WfMS typically requires implementing the application's control flow exclusively by the WfMS. This approach is powerful if the control flow is specified and implemented from scratch, but it has severe drawbacks if a WfMS is to be integrated within environments with existing... View full abstract»

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  • Declarative and procedural object-oriented views

    Publication Year: 1999
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (12 KB)

    One major approach to realise database integration is to adapt and merge the database schemas by defining views. When integrating object-oriented databases, the views need to adequately support object identity and methods. View objects need to be identified on the basis of the objects they have been derived from. Methods must be callable from the query processor without impeding query optimisation... View full abstract»

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  • Ad hoc OLAP: expression and evaluation

    Publication Year: 1999
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (20 KB)

    Users frequently formulate complex data analysis queries in order to identify interesting trends, make unusual patterns stand out, or verify hypotheses. Being able to express these data mining queries concisely is of major importance not only from the user's, but also from the system's point of view. Recent research in OLAP has focused on datacubes and their applications; however expression and pr... View full abstract»

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  • Improving the access time performance of serpentine tape drives

    Publication Year: 1999, Page(s):542 - 551
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    The paper presents a general model for estimating access times of serpentine tape drives. The model is used to schedule I/O requests in order to minimize the total access time. We propose a new scheduling algorithm, Multi-Pass Scan Star (MPScan*), which makes good utilization of the streaming capability of the tape drive and avoids the pitfalls of naive multi-pass scan algorithms and greedy algori... View full abstract»

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  • Hash in place with memory shifting: datacube computation revisited

    Publication Year: 1999
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (20 KB)

    A datacube on n attributes requires the computation of an aggregation function over all groups generated by 2n interelated GROUP-BYs. Even n is not very large, and the computation could be very expensive if the database involved is large. Although a number of algorithms with various optimization techniques have been proposed, accurate estimation of memory requirement and efficient use o... View full abstract»

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  • A database approach for modeling and querying video data

    Publication Year: 1999, Page(s):6 - 13
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (148 KB)

    Indexing video data is essential for providing content based access. We consider how database technology can offer an integrated framework for modeling and querying video data. We develop a data model and a rule-based query language for video content based indexing and retrieval. The data model is designed around the object and constraint paradigms. A video sequence is split into a set of fragment... View full abstract»

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  • Constraint-based rule mining in large, dense databases

    Publication Year: 1999, Page(s):188 - 197
    Cited by:  Papers (67)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (140 KB)

    Constraint-based rule miners find all rules in a given dataset meeting user-specified constraints such as minimum support and confidence. We describe a new algorithm that directly exploits all user-specified constraints including minimum support, minimum confidence, and a new constraint that ensures every mined rule offers a predictive advantage over any of its simplifications. Our algorithm maint... View full abstract»

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  • An agent-based approach to extending the native active capability of relational database systems

    Publication Year: 1999, Page(s):384 - 391
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1452 KB)

    Event-condition-action (or ECA) rules are used to capture active capability. While a number of research prototypes of active database systems have been built, ECA rule capability in relational DBMSs is still very limited. We address the problem of turning a traditional database management system into a full-fledged active database system without changing the underlying system. The advantages of th... View full abstract»

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