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Database and Expert Systems Applications, 1999. Proceedings. Tenth International Workshop on

Date 3-3 Sept. 1999

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  • Proceedings. Tenth International Workshop on Database and Expert Systems Applications. DEXA 99

    Publication Year: 1999
    Request permission for commercial reuse | PDF file iconPDF (1417 KB)
    Freely Available from IEEE
  • Beyond current technology: the perspective of three RC GIS projects panel discussion

    Publication Year: 1999, Page(s): 510
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    Freely Available from IEEE
  • Author index

    Publication Year: 1999, Page(s):933 - 937
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    Freely Available from IEEE
  • A conceptual indexing method for content-based retrieval

    Publication Year: 1999, Page(s):192 - 197
    Cited by:  Papers (1)  |  Patents (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    A great deal of work has been done to define index structures to support feature-based similarity queries. However, other kinds of content-based retrieval, namely keyword-based and concept-based, are founded on different properties of the data space, which make these methods ineffective. Nevertheless, similarity notions are still needed, in order to manage incompleteness and imprecision in the rep... View full abstract»

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  • Logistic regression modeling for context-based classification

    Publication Year: 1999, Page(s):755 - 759
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (40 KB)

    We focus on a machine learning approach to the concept/document classification for IR. We apply a logistic regression-based algorithm to three types of classification tasks: binary classification, multiple classification and classification into a hierarchy. At this stage, for our experiments we use a set of 150 topics from the TIPSTER collection. We develop heuristics as to how to build a logistic... View full abstract»

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  • NIGELOG: protecting logging information by hiding multiple backups in directories

    Publication Year: 1999, Page(s):874 - 878
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    This paper proposes a novel method to protect logging information more securely. The method, named NIGELOG, produces multiple backups of the logging information, hides them in arbitrary directories, and periodically moves these backups to other directories. Also, NIGELOG can automatically restore the original logging information by using the backups even if the original file is altered or deleted ... View full abstract»

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  • Atomicity implementation in mobile computing

    Publication Year: 1999, Page(s):105 - 113
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (60 KB)

    Distributed systems using mobile computing do not have the traditional ACID properties (Atomicity, Consistency, Isolation and Durability), and, therefore, consistency problems may occur. These problems may be managed by using semantic ACID properties, i.e. from an application point of view, the system should function as if all the traditional ACID properties had been implemented. In this paper the... View full abstract»

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  • Integration of diverse hypermedia link servers using request routing

    Publication Year: 1999, Page(s):667 - 671
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (64 KB)

    Hypermedia link servers are a powerful infrastructure component for creation and delivery of network based information applications. The Distributed Link Service is an established design for a link service on the Internet using the WWW infrastructure and has been exercised in a number of projects. We investigate the provision of such a link service operating over multiple and disparate link server... View full abstract»

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  • Conflict resolution and reconciliation in disconnected databases

    Publication Year: 1999, Page(s):76 - 81
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (152 KB)

    As mobile computing devices become more and more popular, mobile databases have started gaining popularity. An important feature of these database systems is their ability to allow optimistic replication of data by providing disconnected mobile devices with the ability to perform local updates. The key problem to this approach is the reconciliation problem, i.e. the problem of serializing potentia... View full abstract»

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  • A relational algebra for user-defined periodicity

    Publication Year: 1999, Page(s):494 - 500
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    Calendars and periodicity play a fundamental role in many applications. Recently, some commercial databases started to support user-defined periodicity in the queries, providing high level languages to this purpose (e.g., TimeSeries in Oracle 8). On the other hand, existing relational data models do not support user-defined periodicity in the data, with few exceptions. We sketch a high level &ldqu... View full abstract»

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  • Is similarity search useful for high dimensional spaces?

    Publication Year: 1999, Page(s):146 - 147
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (24 KB)

    In recent years, multimedia content-based retrieval has become an important research problem. In order to provide effective and also efficient access to relevant data stored in large (often distributed) digital repositories, advanced software tools are necessary. Content-based retrieval works on the idea of abstracting the contents of an object, for example color or shape in the case of images, by... View full abstract»

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  • Document storage and retrieval in a neural database

    Publication Year: 1999, Page(s):598 - 602
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB)

    A database of the leech nervous system has been developed. The end users of the database will mainly be neuroscientists, especially those studying the invertebrate nervous system. It is mainly a document database, collecting papers on the leech nervous system, which is maintained in a largely automatic fashion. The database is composed of three subsystems: (1) an object oriented, relational databa... View full abstract»

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  • Towards the formalization of legal causal reasoning

    Publication Year: 1999, Page(s):780 - 784
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (36 KB)

    In order to build an artificial legal causal reasoner, i.e. a software component that can lead causal reasoning for legal purposes, it is necessary to enhance legal-theoretical accounts of causation by means of formal theories of commonsense reasoning, developed in philosophy, logic and artificial intelligence (AI). The article presents the methodological setup of the author's research about legal... View full abstract»

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  • Task rescheduling in multi-agent manufacturing

    Publication Year: 1999, Page(s):689 - 694
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (124 KB)

    We present a model for task rescheduling in multi-agent manufacturing that is geared toward maximising system efficiency and reliability in an environment with predictable failure patterns. We describe a distributed manufacturing system architecture (http://hms.ifw.uni-hannover.de/public/overview.html) to illustrate the merits of rescheduling. We also develop an action redistribution framework bas... View full abstract»

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  • Document comparison with a weighted topic hierarchy

    Publication Year: 1999, Page(s):566 - 570
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (96 KB)

    A method of document comparison based on a hierarchical dictionary of topics (concepts) is described. The hierarchical links in the dictionary are supplied with the weights that are used for detecting the main topics of a document and for determining the similarity between two documents. The method allows for the comparison of documents that do not share any words literally but do share concepts, ... View full abstract»

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  • SIM-a system for semi-automatic indexing of multilingual documents

    Publication Year: 1999, Page(s):577 - 581
    Cited by:  Patents (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (48 KB)

    With the growing significance of digital libraries and the Internet, more and more electronic texts become accessible to a wide and geographically disperse public. This requires adequate tools to facilitate indexing, storage, and retrieval of documents written in different languages. We present a method for semi-automatic indexing of electronic documents and construction of a multilingual thesauru... View full abstract»

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  • Reasoning with enhanced temporal entity-relationship models

    Publication Year: 1999, Page(s):482 - 486
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (124 KB)

    Recent efforts in the Conceptual Modelling community have been devoted to properly capturing time-varying information, and several proposals of temporally enhanced entity-relationship (ER) exist. The work gives a logical formalisation of the various properties that characterise and extend different temporal ER models which are found in literature. The formalisation we propose is based on descripti... View full abstract»

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  • Similarity indexing by means of a metric

    Publication Year: 1999, Page(s):206 - 210
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (88 KB)

    This paper presents a method for indexing a large data set by means of a metric and indicates its use for quantified proximity searching (search precision is a parameter of the query). We make a proposal for adding the property of a dimension to a metric and show that this is compatible to our customized understanding of a dimension. We present an algorithm which computes, in optimal time, an inde... View full abstract»

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  • On the region proximity in metric spaces

    Publication Year: 1999, Page(s):211 - 215
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (116 KB)

    The problem of defining and measuring proximity of generic metric space regions is investigated. Though the proposed probabilistic approach is valid for arbitrary regions, specific ready-to-use formulas are developed for the important case of ball regions, taking into account the arbitrary distance distributions. Given a measure of proximity the concepts of similarity and selectivity of regions ar... View full abstract»

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  • Applying temporal databases to geographical data analysis

    Publication Year: 1999, Page(s):475 - 480
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (60 KB)

    This paper reports an experience in which a temporal database was used to analyze the results of a survey on human behaviors and displacements in a ski resort. This survey was part of a broader study about the use of the resort's infrastructure, based on the time-geography methodology. As such, the presented experience may be seen as an attempt to implement some concepts of the time-geography usin... View full abstract»

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  • An architecture for modular on-line analytical processing systems: supporting distributed and parallel query processing using co-operating CORBA objects

    Publication Year: 1999, Page(s):45 - 49
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (76 KB)

    During the last few years, online analytical processing (OLAP) has emerged as a valuable tool for the analysis, navigation and reporting of hierarchically organized data from data warehouses. Still, it remains a challenging task to implement and deploy an OLAP system, since no standardized architecture exists, which describes the common components and functionality of OLAP systems. Additionally th... View full abstract»

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  • Guiding the process of requirements elicitation through scenario analysis: Results of an empirical study

    Publication Year: 1999, Page(s):345 - 349
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (48 KB)

    The CREWS 21.903 long term research ESPRIT project has proposed several strategies to support requirements elicitation through textual scenarios analysis. In the CREWS-L'Ecritoire approach, guidelines are proposed to systematise these strategies. To evaluate the effectiveness of the CREWS-L'Ecritoire requirements elicitation guidelines, an empirical study was undertaken. This paper presents an ove... View full abstract»

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  • Spatiotemporal extensions to Unified Modeling Language

    Publication Year: 1999, Page(s):460 - 461
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (20 KB)

    Geographic information systems (GIS) and other multimedia applications such as video databases have motivated recent interest in spatiotemporal data modeling. This paper presents a graphical extension to the Unified Modeling Language (UML) which is designed to support requirements analysis and specification for applications having different underlying space/time models and semantics View full abstract»

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  • The limitations of interactive multiuser 3D environments in the WWW

    Publication Year: 1999, Page(s):279 - 283
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (76 KB)

    With the emergence and integration of the languages VRML and JAVA, the number of available shared virtual environments in the WWW is increasing. However, due to the slow progress of the VRML language and the lack of conformance to its complete specification by the actual browsers, successful 3D environments face some limitations: from high latency to low presentation quality and small number of us... View full abstract»

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  • The use of information retrieval tools in automatic document modeling and recognition

    Publication Year: 1999, Page(s):522 - 526
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (28 KB)

    A combination of information retrieval (RI) tools and structural recognition (SR) tools are used for the automatic construction of a generic model of documents. The automatic construction takes as input a structured database of the documents which is converted into SGML, giving a logical representation of their content. The RS tools are applied to the postscript representation of the documents to ... View full abstract»

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