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Lecture Notes in business Information Processing 2009年 19卷 155-171页

作者： Bögl, Andreas Schrefl, Michael Pomberger, Gustav Weber, Norbert Department of Business Informatics - Data and Knowledge Engineering Johannes Kepler University Linz Altenberger Straße 69 4040 Linz Austria Department of Business Informatics - Software Engineering Johannes Kepler University Linz Altenberger Straße 69 4040 Linz Austria Siemens AG Corporate Technology-SE 3 Otto-Hahn-Ring 6 Munich Germany

ISBN: (纸本)9783642006692

An automated identification of common modeling practices from EPC (Event-Driven Process Chain) models requires to perform a semantic analysis of EPC functions and events. The semantic analysis faces the problem that an essential part of the EPC semantics is bound to natural language expressions in functions and events with undefined process semantics. The semantic annotation of natural language expressions provides an adequate approach to tackle this problem. This paper introduces a novel approach that enables an automated semantic annotation of EPC functions and events. It employs semantic patterns to analyze the textual structure of natural language expressions and to relate them to instances of a reference ontology. Thus, semantically annotated EPC model elements are input for subsequent semantic analysis that identifies common modeling practices. © 2009 Springer Berlin Heidelberg.

关键词： Ontology

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eduWEAVER: Integrated Design, Development and Deployment of eLearning Scenarios

eduWEAVER: Integrated Design, Development and Deployment of ...

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International Conference on Internet and Web Applications and Services (ICIW)

作者： F. Waldner M. Nemetz C. Steinberger Department of Knowledge and Business Engineering University of Technology Vienna Vienna Austria Department of Knowledge and Business Engineering University of Technology Vienna Austria Department of Informatics University of Klagenfurt Klagenfurt Austria

The trend towards more didactics in eLearning and the increased usage of new media makes the design and development of courses increasingly complex. Only parts of the eLearning development process are supported by IT. As an effect, this may lead to a lower quality in eLearning material and courses, which in turn makes the possibility of participating in eLearning courses a rather unattractive option. In aiming to achieve a higher quality for eLearning-based courses, we introduce a conceptual model - the course creation model - that serves as a guideline for designing, realizing, and evaluating eLearning processes. This model is applied with eduWEAVER, a Web application that integrates design, development, and deployment of eLearning scenarios.

关键词： Electronic learning Best practices Least squares approximation Courseware knowledge engineering Web and internet services Conference management Documentation Guidelines HTML

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Semantic web search for e-government: The case study of intrastat

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Journal of Internet Technology 2007年第4期8卷 457-468页

作者： Markellos, Konstantinos Sakkopoulos, Evangelos Sirmakessis, Spiros Tsakalidis, Athanasios Research Academic Computer Technology Institute Department of Computer Engineering and Informatics University of Patras Greece Department of Applied Informatics in Administration and Economics Technological Educational Institutional of Messolongi University of Patras Greece Department of Computer Engineering and Informatics University of Patras Greece Department of Applied Informatics in Administration and Economy TEI of Messolongi Data Bases and Information Systems Sector E-business and Human Computer Interaction Lab.

The field of Statistics is a conceptually rich domain where information is complex, huge in volume, and highly valuable and critical for Governmental institutes. The daily production of statistical information increases exponentially worldwide, making the processing of all this information a very difficult and time - consuming task. Therefore, efficient search, filtering and browsing techniques are needed to access and process statistical data in an effective way. We present semantically enhanced search approach to enhance e-Govemment searching services. We evaluate our proposals on the case of Intrastat, that is the method of collecting information and producing statistics on the export and import of goods between Member States of the European Union (EU), providing added - value web search services. We employ Semantic Web technologies to create an intelligent search engine based on modeling the systems' electronic catalogue using the OWL ontology language, combined with AJAX techniques for usability richness and responsiveness. We present a search tool based on these technologies, that consists of a) our novel ontology for the EU Combined Nomenclature codes serving as a knowledge base, b)a semantically enhanced search and recommendation module that improves the quality of the results and c) a "Search as you type" visualization and navigation module to provide a usable interface to be used in navigation and search.

关键词： Semantic Web

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From single-site web applications to the design of web-site-families

From single-site web applications to the design of web-site-...

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IASTED International Conference on Software engineering, as part of the 24th IASTED International Multi-Conference on APPLIED informatics

作者： Eichinger, Christian Schrefl, Michael Department of Business Informatics - Data and Knowledge Engineering Johannes-Kepler-University Linz Altenbergerstr. 69 Linz Austria

ISBN: (纸本)0889865744

Web applications, or web sites, are an important communication medium conveying information between organizations and the users of their web applications. To ensure a unique appearance of their web applications, organizations define standardized content, navigation and presentation requirements for web applications within their corporate identity. However, specialized information supplied by organizational units may not fit into this standardized scheme. To overcome this situation, we introduce the concept of web site families, capable of capturing the requirements necessary to fulfill the corporate identity, while at the same time providing the flexibility to specify distinct requirements of organizational units. Web site families rely on a hierarchical model in which common requirements for a family of web sites are captured. Those requirements may be extended, refined or re-structured within a concrete web site of an organizational unit as long as it adheres to the common requirements. In this paper we will define the structure of web site families and how consistency criteria derived from the common requirements of organizations allow the flexible definition of families of web sites.

关键词： Web services

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An architecture for proactive timed Web Service Compositions

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business Process Management Workshops, BPM 2006 - International Workshops, BPD, BPI, ENEI, GPWW, DPM, semantics4ws, Proceedings

作者： Eder, Johann Pichler, Horst Vielgut, Stefan Department of Knowledge and Business Engineering University of Vienna Austria Department of Informatics-Systems University of Klagenfurt Austria

ISBN: (纸本)3540384448

Web Services-based business processes spread over the boundaries of companies, requiring the integration of customers, suppliers and partners to achieve inter-organizational business goals. According to organizational rules temporal constraints, like deadlines, must be denned for processes. Violation of these constraints usually results in increased cost and reduced quality of service. Advanced workflow time management approaches allow the prediction of eventually arising time constraint violations and enables proactive initiation of evasive " self healing" actions. This saves time, avoids unnecessary task-compensations and therefor decreases costs. In this paper we present an architecture for Web Service Composition environments which enables the usage of advanced predictive and proactive time management features. © Springer-Verlag Berlin Heidelberg 2006.

关键词： Telecommunication services

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Generic data access in XML based workflow management systems

Generic data access in XML based workflow management systems

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18th International Conference on Advanced Information Systems engineering: Trusted Information Systems, CAiSE 2006

作者： Dreier, Christian Eder, Johann Lehmann, Marek Tahamtan, Amirreza Alps-Adria University of Klagenfurt Department of Informatics-Systems Austria University of Vienna Department of Knowledge and Business Engineering Austria

Various kinds of data are processed in workflow management systems: from case data to control data, from internal data to access to external databases or documents exchanged in inter-organizational workflows. We propose a uniform treatment of all kinds of business data in workflows. This is achieved by an abstraction mechanism which enables the transparent access to data in any source in a uniform way. We describe an implementation of our extendible generic data access plug-in which provides the workflow management system with updateable XML views of relational data.

关键词： XML

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Avoidance of deadline-violations for inter-organizational business processes

Avoidance of deadline-violations for inter-organizational bu...

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International Baltic Conference on databases and Information Systems, DB&IS

作者： J. Eder H. Pichler S. Vielgut Department of Knowledge and Business Engineering University of Technology Vienna Austria Department of Informatics-Systems University of Klagenfurt Austria

Workflow time management allows the prediction of eventually arising deadline violations and enables proactive initiation of evasive actions. This saves time, avoids compensation tasks and therefore decreases costs. Current time management approaches assume that communication with external tasks, which are enacted by the process, is conducted in a blocking or synchronous manner. As inter-organizational processes frequently communicate in a non-blocking manner we examined basic asynchronous communication patterns and provided a mapping for each pattern in order to use it for time management purposes

关键词： Costs Asynchronous communication Delay Companies business process re-engineering knowledge engineering knowledge management engineering management Workflow management software Quality of service

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MiniCount: Efficient Rewriting of COUNT-Queries Using Views

MiniCount: Efficient Rewriting of COUNT-Queries Using Views

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International Conference on data engineering

作者： Vaclav Lin V. Vassalos P. Malakasiotis Department of Information and Knowledge Engineering University of Economics Prague Czech Republic Department of Informatics Athens University of Economics and Business Athens Greece

ISBN: (纸本)9781424429448

We present MiniCount, the first efficient sound and complete algorithm for finding maximally contained rewritings of conjunctive queries with count, using conjunctive views with count and conjunctive views without aggregation. An efficient and scalable solution to this problem yields significant benefits for data warehousing and decision support systems, as well as for powerful data integration *** first present a naive rewriting algorithm implicit in the recent theoretical results by Cohen et al. [5] and identify three independent sources of exponential complexity in the naive algorithm, including an expensive containment check. Then we present and discuss MiniCount and prove it sound and complete. We also present an experimental study that shows Mini- Count to be orders of magnitude faster than the naive algorithm, and to be able to scale to large numbers of views

关键词： Aggregates Warehousing Query processing Power generation economics databases informatics Decision support systems

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Semantics, Web and Mining: Preface

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2006年 4289 LNAI卷 v-vi页

作者： Berendt, Bettina Hotho, Andreas Mladenič, Dunja Semeraro, Giovanni Spiliopoulou, Myra Stumme, Gerd Van Someren, Maarten Ackermann, Markus Grobelnik, Marko Svátek, Vojtěch Institute of Information Systems Humboldt University Berlin Germany Knowledge and Data Engineering Group University of Kassel Germany J. Stefan Institute Ljubljana Slovenia Department of Informatics University of Bari Italy Faculty of Computer Science Otto-von-Guericke-Univ. Magdeburg Germany Informatics Institute University of Amsterdam Netherlands Dept. of Natural Language Processing Institute for Computer Science University of Leipzig Germany University of Economics Prague Czech Republic

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SemCrypt - Ensuring privacy of electronic documents through semantic-based encrypted query processing

SemCrypt - Ensuring privacy of electronic documents through ...

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21st International Conference on data engineering Workshops 2005

作者： Schrefl, Michael Grün, Katharina Dorn, Jürgen Department of Business Informatics - Data and Knowledge Engineering Johannes Kepler University Linz 4040 Linz Austria EC3 - Electronic Commerce Competence Center 1220 Vienna Austria

ISBN: (纸本)0769526578

The trend towards outsourcing increases the number of documents stored at external service providers. This storage model, however, raises privacy and security concerns because the service providers cannot be trusted with respect to maintaining the privacy of the documents. The research project SemCrypt explores techniques for processing queries and updates over encrypted XML documents stored at untrusted servers. By performing encryption and decryption only on the client and not on the server, SemCrypt guarantees that neither the document structure nor the document content are disclosed on the server. Filtering query results and processing as much as possible of the query/update statement on the server does not depend on special encryption techniques. Instead, the chosen approach exploits the structural semantics of XML documents and uses standard, well-proven encryption techniques. SemCrypt thus enables to query and update encrypted XML documents on untrusted servers while ensuring data privacy. © 2005 IEEE.

关键词： data privacy

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