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Data Engineering, 1999. Proceedings., 15th International Conference on

Date 23-26 March 1999

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Displaying Results 1 - 25 of 92
  • Proceedings 15th International Conference on Data Engineering (Cat. No.99CB36337)

    Publication Year: 1999
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    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 (1)
    Save to Project icon | Request Permissions | 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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  • Data Mining from an Al Perspective

    Publication Year: 1999 , Page(s): 186
    Save to Project icon | Request Permissions | 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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  • Author index

    Publication Year: 1999 , Page(s): 646 - 648
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    Freely Available from IEEE
  • Atomic commitment in database systems over active networks

    Publication Year: 1999
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (88 KB)  

    Traditional communication networks have functioned only to deliver information packets from one end system to another. As the cost of computing power continues to decrease, it is worthwhile to consider the benefits of adding more of that computing power to the network itself, either to enhance services or to trade off against other costs such as time, bandwidth and storage. This new area of resear... View full abstract»

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  • Managing distributed memory to meet multiclass workload response time goals

    Publication Year: 1999 , Page(s): 87 - 94
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (148 KB)  

    In this paper we present an online method for managing a goal-oriented buffer partitioning in the distributed memory of a network of workstations. Our algorithm implements a feedback mechanism which dynamically changes the sizes of dedicated buffer areas and thereby the buffer hit rate for the different classes in such a way that user-specified response time goals are satisfied. The aggregated siz... View full abstract»

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  • Multiple index structures for efficient retrieval of 2D objects

    Publication Year: 1999
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (28 KB)  

    Many applications require the storage and management of large databases of 2D objects. One of the important functionalities required by all of these applications is the capability to find objects in a database that match a given object. We concentrate on whole matching queries, in which a query object is compared with a set of objects to find the ones that are either exactly identical or similar t... View full abstract»

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  • Speeding up heterogeneous data access by converting and pushing down string comparisons

    Publication Year: 1999
    Cited by:  Patents (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (40 KB)  

    Pushing down predicates to an external data source is critical to the performance for querying heterogeneous data sources. However, predicate-containing string comparisons cannot be pushed down unchanged if the external data source uses a different collating sequence. We describe a table-driven technique for rewriting such predicates to account for the differences in collation. In addition to prec... View full abstract»

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  • Document warehousing based on a multimedia database system

    Publication Year: 1999 , Page(s): 168 - 173
    Cited by:  Papers (3)  |  Patents (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1112 KB)  

    Nowadays, structured data such as sales and business forms are stored in data warehouses for decision makers to use. Further, unstructured data such as emails, HTML texts, images, videos, and office documents are increasingly accumulated in personal computer storage due to spread of mailing, WWW, and word processing. Such unstructured data, or what we call multimedia documents, are larger in volum... View full abstract»

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  • Maintaining data cubes under dimension updates

    Publication Year: 1999 , Page(s): 346 - 355
    Cited by:  Papers (10)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (304 KB)  

    OLAP systems support data analysis through a multidimensional data model, according to which data facts are viewed as points in a space of application-related “dimensions”, organized into levels which conform to a hierarchy. The usual assumption is that the data points reflect the dynamic aspect of the data warehouse, while dimensions are relatively static. However, in practice, dimens... View full abstract»

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  • Raster-spatial data declustering revisited: an interactive navigation perspective

    Publication Year: 1999 , Page(s): 600 - 607
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (136 KB)  

    Various declustering techniques have been proposed in the literature for raster-geospatial data. Their primary focus is on reducing response time for static range queries. We focus on interactive navigation queries, which exhibit a new class of data access patterns. We analyze and compare the performance of three well-known declustering schemes: Disk Modulo, Exclusive-OR, and Hilbert Curve Access ... 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 (3)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (72 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.... View full abstract»

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  • Query processing issues in image (multimedia) databases

    Publication Year: 1999 , Page(s): 22 - 29
    Cited by:  Papers (36)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (148 KB)  

    Multimedia database systems are essential for the effective and efficient use of large collections of image data. The aim of such systems is to enable retrieval of images based on their contents. As part of our research in this area, we are building a prototype content-based image retrieval system called CHITRA. This uses a four-level data model, and we have defined a fuzzy object query language (... View full abstract»

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  • Algorithms for index-assisted selectivity estimation

    Publication Year: 1999
    Cited by:  Patents (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (12 KB)  

    The standard mechanisms for query selectivity estimation used in relational database systems rely on properties that are specific to the attribute types. The query optimizer in an extensible database system is, in general, unable to exploit these mechanisms for user-defined types, forcing the database extender to invent new estimation mechanisms. In this paper, we discuss extensions to the general... 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 (13)
    Save to Project icon | Request Permissions | 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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  • A graph query language and its query processing

    Publication Year: 1999 , Page(s): 572 - 581
    Cited by:  Papers (6)  |  Patents (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (200 KB)  

    Many new database applications involve querying of graph data. We present an object-oriented graph data model, and an OQL like graph query language, GOQL. The data model and the language are illustrated in the application domain of multimedia presentation graphs. We then discuss the query processing techniques for GOQL, more specifically, the translation of GOQL, into an operator-based language, c... 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 (5)
    Save to Project icon | Request Permissions | 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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  • Using codewords to protect database data from a class of software errors

    Publication Year: 1999 , Page(s): 276 - 285
    Cited by:  Papers (2)  |  Patents (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (112 KB)  

    Increasingly, for extensibility and performance, special-purpose application code is being integrated with database system code. Such application code has direct access to database system buffers and, as a result, the danger of data being corrupted due to inadvertent application writes is increased. Previously proposed hardware techniques to protect data from corruption required system calls, and ... 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
    Save to Project icon | Request Permissions | 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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  • On similarity-based queries for time series data

    Publication Year: 1999 , Page(s): 410 - 417
    Cited by:  Papers (13)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (168 KB)  

    Studies similarity queries for time series data, where similarity is defined in terms of a set of linear transformations on the Fourier series representation of a sequence. We have shown in an earlier work that this set of transformations is rich enough to formulate operations such as moving average and time scaling. In this paper, we present a new algorithm for processing queries that define simi... 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 (8)
    Save to Project icon | Request Permissions | 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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  • Efficient mining of partial periodic patterns in time series database

    Publication Year: 1999 , Page(s): 106 - 115
    Cited by:  Papers (63)  |  Patents (7)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (172 KB)  

    Partial periodicity search, i.e., search for partial periodic patterns in time-series databases, is an interesting data mining problem. Previous studies on periodicity search mainly consider finding full periodic patterns, where every point in time contributes (precisely or approximately) to the periodicity. However, partial periodicity is very common in practice since it is more likely that only ... View full abstract»

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  • Developing a DataBlade for a new index

    Publication Year: 1999 , Page(s): 314 - 323
    Cited by:  Papers (4)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (112 KB)  

    In order to better support current and new applications, the major DBMS vendors are stepping beyond uninterpreted binary large objects, termed BLOBs, and are beginning to offer extensibility features that allow external developers to extend the DBMS with, e.g., their own data types and accompanying access methods. Existing solutions include DB2 extenders, Informix DataBlades, and Oracle cartridges... View full abstract»

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  • Mobile agents for WWW distributed database access

    Publication Year: 1999 , Page(s): 228 - 237
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | 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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  • Using XML in relational database applications

    Publication Year: 1999
    Cited by:  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (60 KB)  

    The author reviews relational database XML features and describes their use in database applications. Aspects that will be considered include the creation, validation, transformation, storage and retrieval of XML documents, the inclusion of existing and new relational data in XML documents, and the impact of XML Links View full abstract»

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