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Proceedings. 15th International Workshop on Database and Expert Systems Applications, 2004.

30 Aug.-3 Sept. 2004

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Displaying Results 1 - 25 of 181
  • Hierarchies in HTML documents: linking text to concepts

    Publication Year: 2004, Page(s):186 - 190
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (274 KB) | HTML iconHTML

    For the successful setting of the semantic Web, it is necessary to provide tools for linking the large amounts of data that are currently available in HTML documents to the semantic Web ontologies. Due to the enormous variability of the HTML code, it is very limiting to define direct bindings between patterns of the HTML code and the concepts. We propose an approach based on modeling the visual pa... View full abstract»

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  • Learn as you solve - inventory models Web solver

    Publication Year: 2004, Page(s):426 - 429
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB) | HTML iconHTML

    This work presents a Web-based tool for solving inventory model problems based on stationary demand. The idea behind the tool is to develop a set of dynamic tools that can be easily accessed and utilized by users, both novices and experts, in dealing with inventory model problems. Regardless of the user type, the tool can guide the user into achieving the required results while building results on... View full abstract»

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  • Psychological models in autonomic computing systems

    Publication Year: 2004, Page(s):747 - 751
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (246 KB) | HTML iconHTML

    This paper considers three psychological theories of motivation with respect to their potential contributions to autonomic systems design. Motivational theories are explored here since they seek to explain the mechanisms by which behaviours in living organisms are initiated. These motivational drives offer an analogy with the management of autonomic functions by modelling the criteria under which ... View full abstract»

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  • Software implementation for mobile agents in peer-to-peer-networks - a case study

    Publication Year: 2004, Page(s):959 - 963
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB) | HTML iconHTML

    The topic of mobile agents has been of great interest to researchers in the last years. However, research concentrated on academic systems, like simulation or other applications in the area of artificial intelligence, or on systems with central authorities and in a trustworthy environment. This paper shows how a framework suitable for open (and therefore untrusted) peer-to-peer-networks has been d... View full abstract»

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  • A knowledge-based framework for dynamic semantic Web services brokering and management

    Publication Year: 2004, Page(s):174 - 178
    Cited by:  Papers (11)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (298 KB) | HTML iconHTML

    The concept of automating Web services, specifically the brokering activities, is an active research topic. We need a comprehensive and overarching framework that handles the discovery, differentiation, negotiation and selection processing within the context of workflow management, and addresses the issues related to virtual organizations. The goal is to add semantics to Web services to endow them... View full abstract»

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  • Personalised e-learning opportunities - call for a pedagogical domain knowledge model

    Publication Year: 2004, Page(s):410 - 414
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (281 KB) | HTML iconHTML

    A considerable amount of e-learning content is being delivered via virtual or managed learning environments. These platforms keep track of learners' activities including content viewed, time spent and quiz results. This monitoring trawl provides appropriate data to enable personalised e-learning experiences through the application of existing data mining and knowledge discovery techniques. The rea... View full abstract»

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  • Installable unit deployment descriptor for autonomic solution management

    Publication Year: 2004, Page(s):742 - 746
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (317 KB) | HTML iconHTML

    Today's enterprise solutions consist of multiple components whose deployment must be coordinated across multiple, heterogeneous hosting environments, including operating systems, application servers, databases and other middleware. The requirements of software components on their hosting environments and their interdependencies must be fully specified in order to enable an autonomic management of ... View full abstract»

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  • Integrating GML resources and other Web resources

    Publication Year: 2004, Page(s):872 - 877
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (298 KB) | HTML iconHTML

    In tackling the semantic Web, a rich domain that requires special attention is the Semantic Geospatial Web. We make a contribution to the Semantic Geospatial Web by defining an approach based on an ontology for integrating nonspatial resources such as html, pdf, pictures (gif, jpg), etc., with GML documents. It is based on a catalog, which stores descriptions about both nonspatial resources and GM... View full abstract»

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  • Dimensions of ignorance in a semi-structured data model

    Publication Year: 2004, Page(s):933 - 937
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    Before defining a model for uncertain and imprecise semistructured data, a clear understanding of the semantics of ignorance is necessary. We show that many dimensions of ignorance may coexist inside a semistructured data instance. We classify them, on the basis of a general data model, and we identify their interdependencies. We also show that the restriction of our model to the relational contex... View full abstract»

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  • Filtering location stream in moving object database

    Publication Year: 2004, Page(s):645 - 649
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (347 KB) | HTML iconHTML

    One of the challenges to build a high performance moving object database (MOD) is how to efficiently process the location stream which are inserted at a high rate beyond the tolerance of database, while location accuracy needs to be preserved. Based on CAMEL, an MOD prototype implemented in IBM China Research Lab, we present the location filter module and integrate it into the CAMEL to address the... View full abstract»

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  • Storing and handling vague spatial objects

    Publication Year: 2004, Page(s):945 - 950
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (401 KB) | HTML iconHTML

    This paper deals with the storage and manipulation of vague spatial objects: points, lines, and regions. Vector data format is used to implement vague objects. We store vague objects by extending GRASS vector format capabilities. A point is represented by a triple, containing the location and the membership value of the point. A line is represented by a sequence of triples, each containing the loc... View full abstract»

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  • An efficient optimal leaf ordering for hierarchical clustering in microarray gene expression data analysis

    Publication Year: 2004, Page(s):396 - 400
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (270 KB) | HTML iconHTML

    The objective of This work is to derive an efficient and optimal ordering method for genes produced by binary hierarchical clustering. The proposed method examines all possible 2n-1 orderings in O(n2) time complexity. Compared to the previously proposed methods, our proposed solution is efficient and optimal. View full abstract»

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  • Using virtual organizations membership system with EDG's grid security and database access

    Publication Year: 2004, Page(s):517 - 522
    Cited by:  Papers (2)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (355 KB) | HTML iconHTML

    We describe the European data grid's (EDGs) Java security system and spitfire database access system giving special emphasis on the virtual organization technologies. These technologies create a feasible framework for authentication and authorization in distributed grid applications. A virtual organization (VO) is a collection of people in the same administrative domain. A user can belong to many ... View full abstract»

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  • Natural inspiration for self-adaptive systems

    Publication Year: 2004, Page(s):732 - 736
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (283 KB) | HTML iconHTML

    The emergent behaviour of autonomic systems, together with the scale of their deployment, impedes prediction of the fall range of configuration and failure scenarios; thus it is not possible to devise management and recovery strategies to cover all possible outcomes. One solution to this problem is to embed self-managing and self-healing abilities into such applications. Traditional design approac... View full abstract»

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  • SDIs: potentials for agriculture

    Publication Year: 2004, Page(s):866 - 870
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (495 KB) | HTML iconHTML

    Driven by especially legal forces, the use of geoinformation(GI)-technology in European agriculture recently takes a turn from being just a niche-technology to a turn-key-technology in near future in this application domain. Due to the multifaceted character of agriculture, it can be foreseen that this evolution results in a clear demand for well working spatial data infrastructures (SDI) and corr... View full abstract»

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  • XML document summarization: using XQuery for synopsis creation

    Publication Year: 2004, Page(s):928 - 932
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (315 KB) | HTML iconHTML

    This work presents a methodology to support approximate queries over massive and heterogeneous XML data sets, based on concise data statistics such as histograms or other statistical techniques. The basic idea for approximate answers is to store precomputed summaries of the XML data, also called synopses, and to query them instead of the original database, thus saving time and computational costs.... View full abstract»

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  • Using RDF for policy specification and enforcement

    Publication Year: 2004, Page(s):163 - 167
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (305 KB) | HTML iconHTML

    Security issues for the resource description framework (RDF) [RDF] are today crucial due to the key role played by RDF for the semantic Web [Berners-Lee, T. et al. (2001)]. However, despite its importance, RDF security is still a novel area and very little work has been done so far. We make a first step in this direction by proposing an approach for using RDF for policy specification and enforceme... View full abstract»

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  • Automated Japanese essay scoring system:jess

    Publication Year: 2004, Page(s):4 - 8
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (287 KB) | HTML iconHTML

    We have developed an automated Japanese essay scoring system named jess. The system evaluates an essay from three features: (1) rhetoric - ease of reading, diversity of vocabulary, percentage of big words (long, difficult words), and percentage of passive sentences; (2) organization - characteristics associated with the orderly presentation of ideas, such as rhetorical features and linguistic cues... View full abstract»

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  • Reducing group management overhead in group-based location management

    Publication Year: 2004, Page(s):640 - 644
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (395 KB) | HTML iconHTML

    Location management is fundamental in supporting location-dependent applications in a mobile environment. It is crucial to reduce the high uplink communication cost in reporting the location of mobile hosts. Group-based location updating scheme is able to exploit the spatial locality of mobile hosts to generate an aggregated location update from a group leader, thereby reducing the number of high ... View full abstract»

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  • Living with inconsistencies in a multidatabase system

    Publication Year: 2004, Page(s):905 - 909
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB) | HTML iconHTML

    Integration of autonomous sources of information is one of the most important problems in implementation of the global information systems. This paper considers multidatabase systems as one of the typical architectures of global information services and addresses a problem of storing and processing inconsistent information in such systems. A new data model proposed in the paper separates sure from... View full abstract»

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  • LITO - a logic for indeterminate temporal objects

    Publication Year: 2004, Page(s):940 - 944
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (333 KB) | HTML iconHTML

    In order to obtain a suitable model of the universe of discourse of some information systems, it is important to allow the description of imprecise objects with temporal indeterminacy. These objects are called indeterminate temporal objects. This work presents formalism, called LITO (logic of indeterminate temporal objects), for the representation, querying and modification of such objects. View full abstract»

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  • Data extraction from Web data sources

    Publication Year: 2004, Page(s):282 - 288
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (387 KB) | HTML iconHTML

    An explanation is given of the basic data structures used in a new page analysis technique to create wrappers (data extractors) for the result pages produced by Web sites in response to user qeries via Web page forms. The key structure called a tpGrid is a representation of the web page, which is easier to analyse than the raw HTML code. The analysis looks for repetition patterns of sets of tagSet... View full abstract»

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  • Directional neighbourhood calculations in spatial partition trees

    Publication Year: 2004, Page(s):824 - 828
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (330 KB) | HTML iconHTML

    We present an extension of the multidimensional binary indexing algorithm for neighbourhood calculations in spatial partition trees [Poveda, J. et al. (2003)]. The algorithm in the earlier paper provided a matrix characterization to support calculus of neighbours in a spatial partition tree representation. That calculus was implicitly defined only for face-to-face neighbours. The extension present... View full abstract»

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  • A dichotomous algorithm for association rule mining

    Publication Year: 2004, Page(s):562 - 566
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (266 KB) | HTML iconHTML

    The analysis of large amounts of data requires important computing resources that may not be available, even in current environment, and there are traditionally two main ways for solving this problem. The first is to use multiprocessor machines, and the second is to use computer clusters. The main drawbacks of these solutions are the expensive cost of machines and their specific utilization. In or... View full abstract»

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  • Exploiting agent and database technologies for biological data collection

    Publication Year: 2004, Page(s):376 - 381
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (341 KB) | HTML iconHTML

    Web data sources constitute an important resource for biological research. A simple tool that can retrieve information from different Web sites through a single interface and store the extracted data in a standardized format for efficient future use is critical to scientific discovery. We discuss an approach that combines agent and database technologies for biological data integration. To illustra... View full abstract»

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