Forschungsschwerpunkte
- Datenbanken und Informationssysteme
- Geschäftsprozessmodellierung
- Internet und Web - technische und soziale Auswirkungen
- Paradigmen zur Behandlung von "Big Data"
- Spezielle Fragen des Cloud Computing
Vita
Akademische Ausbildung
- Habilitation und Erlangung der Venia legendi für Informatik an der RWTH Aachen, Habilitationsthema: "Transaktionsverarbeitung in Datenbanksystemen unter Ausnutzung semantischer Information"
- Promotion zum Dr. rer. nat. an der Mathematisch-Naturwissenschaftlichen Fakultät der RWTH Aachen, Dissertationsthema: "Entwurf und Bearbeitung von Datenbanken im Universalrelationen-Datenmodell", Betreuer: Prof. Dr. Walter Oberschelp
- Studium der Informatik an der RWTH Aachen
- Abschluss des Studiums als Diplom-Informatiker an der RWTH Aachen
Beruflicher Werdegang
- Universitätsprofessor (C4), Inhaber des Lehrstuhls für Informatik im Institut für Wirtschaftsinformatik der Westfälischen Wilhelms-Universität (WWU) Münster
- Direktor des European Research Center for Information Systems (ERCIS) der WWU Münster
- Gastprofessuren an der Karlstad Universitet, Schweden, der Marmara- Universität, Istanbul, am Hasso-Plattner-Institut in Potsdam und an der University of Waikato, Hamilton, Neuseeland
- Universitätsprofessor (C3) für Informatik an der Justus-Liebig-Universität Gießen
- Wissenschaftlicher Mitarbeiter am Lehrstuhl für Angewandte Mathematik, insbesondere Informatik der RWTH Aachen (Leitung: Prof. Dr. W. Oberschelp)
- Vertretungsprofessuren an den Universitäten Kiel, Düsseldorf und Koblenz
- Visiting Assistant Professor am Computer Science Department der University of California, San Diego, USA
Mitgliedschaften und Aktivitäten in Gremien
- Stellvertretender Vorsitzender des Lenkungsgremiums von Cert-IT, Bonn
- Mitglied der IEEE Computer Society, USA
- Wissenschaftlicher Leiter der Deutschen Informatik-Akademie (DIA), Bonn
- Vizepräsident und Schatzmeister der Gesellschaft für Informatik e.V.
- Co-Editor-in-Chief der Zeitschrift "Information Systems"
- Mitglied der Association for Information Systems (AIS)
- Mitglied der Association for Computing Machinery (ACM), USA
- Mitglied der Gesellschaft für Informatik e.V.
Ruf
- Martin-Luther-Universität Halle-Wittenberg – abgelehnt
Publikationen
- . . ‘Self-Organizing Maps for Data Purchase Support in Data Marketplaces.’ In Computational Collective Intelligence, edited by , 43–55. Basel : Springer International Publishing. doi: 10.1007/978-3-031-41456-5.
- 1. Aufl. Bonn: Gesellschaft für Informatik. (Eds.): . Datenbanksysteme für Business, Technologie und Web.
- 1. Aufl. Basel : Springer International Publishing. doi: 10.1007/978-3-031-41774-0. (Eds.): . Advances in Computational Collective Intelligence .
- . . ‘Search Engines and Algorithms.’ In Handbuch Digitalisierung, edited by , 525–541. 1. Aufl. München: Verlag Franz Vahlen.
- . . „Künstliche Intelligenz, Bias und Versicherungen – eine technische und rechtliche Analyse.“ Zeitschrift für die gesamte Versicherungswissenschaft 111, Nr. 2: 135–175. doi: 10.1007/s12297-022-00528-1.
- . . ‘Recommending View Bundles in Data Marketplaces.’ In IEEE International Conference on Systems, Man, and Cybernetics, SMC 2022, Prague, Czech Republic, October 9-12, 2022, edited by , 3403–3408. New York City: Wiley-IEEE Press. doi: 10.1109/SMC53654.2022.9945110.
- In Intelligent Information and Database Systems , edited by , 550–561. Heidelberg: Springer. doi: 10.1007/978-981-15-3380-8_48. . ‘A Modular Diversity Based Reviewer Recommendation System.’
- Contributed to the 6th IEEE Latin American Conference on Computational Intelligence (LA-CCI), Guayaquil, Ecuador. . ‘Supporting Customers with Limited Budget in Data Marketplaces.’
- . . „Daten, Analytics, KI: Wird die Zukunft naughty oder nice?“ DOAG Business News 6, Nr. Fall 2019: 24–26.
- In Dagstuhl-Report, edited by , 69–94. 9. Aufl. Wadern: Dagstuhl Publishing. doi: 10.4230/DagRep.9.6.69. . ‘Distributed Computing with Permissioned Blockchains and Databases.’
- . . ‘Supporting Customers with Limited Budget in Data Marketplaces.’ Contributed to the 6th IEEE Latin American Conference on Computational Intelligence LA-CCI, Guayaquil. doi: 10.1109/LA-CCI47412.2019.9037038.
- . . „Digitale Lehre - der FB4 als Vorreiter.“ In 50 Jahre Wirtschaftswissenschaftliche Fakultät der WWU Münster - Historie und Perspektiven, herausgegeben von , 305–309. 1. Aufl. Münster: Aschendorff Verlag.
- . . ‘Structuring What You Are Doing: 20 Years of Business Process Modeling.’ In The Art of Structuring - Bridging the Gap Between Information Systems Research and Practice, edited by , 227–238. 1. Aufl. Berlin: Springer Nature.
- . . ‘Bluetooth Mesh Networks for Indoor Localization.’ Contributed to the 20th IEEE International Conference on Mobile Data Management (MDM) 2019, Hong Kong China.
- . . „Gamification in der Unternehmensplanung.“ DOAG Business News 1: 20–22.
- . . „Reporting- und Analyseinfrastrukturen in Banken.“ DigiPraktiker - Digitalisierung Banking & Finance 2: 8–19.
- . . ‘A Recommender System Based on Omni-Channel Customer Data.’ Contributed to the 21st IEEE Conference on Business Informatics (CBI' 19), Moscow, Russia.
- . . ‘Enhancing Traditional Recommender Systems via Social Communities.’ Vietnam Journal of Computer Science 6, Nr. 1: 3–16. doi: 10.1142/S2196888819500040.
- . . ‘Structuring What You Are Doing: 20 Years of Business Process Modelling.’ In The Art of Structuring: Bridging the Gap Between Information Systems Research and Practice, edited by , 227–238.
- . . ‘Enhancing Traditional Recommender Systems via Social Communities.’ The Scientific World Journal 6, Nr. 1: 3–16.
- . . „Softwareverletzung – Missverständnisse bei der Feststellung der Schutzfähigkeit von Computerprogrammen.“ Kommunikation & Recht : K & R 21, Nr. 2: 79–84.
- . . ‘A Generic Framework for Collaborative Filtering Based on Social Collective Recommendation.’ In Computational Collective Intelligence, edited by , 238–247. Basel : Springer International Publishing.
- . . Digitalisierung der Lehre am Fachbereich 4 der WWU Münster: Bestandsaufnahme und Handlungsempfehlungen Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 141, .
- . . „Analytisches CRM unter Einbeziehung von Social Media-Daten.“ In BI & Analytics in der Cloud, herausgegeben von , 105–125. 1. Aufl. Heidelberg: dpunkt Verlag.
- . . ‘Using the Web While Offline: A Case Comparison.’ In Handbook of Research on Contemporary Perspectives on Web-Based Systems, edited by , 108–124. 1. Aufl. Hershey PA: IGI Global.
- . . ‘Discovering SQL Queries from Examples using Intelligent Algorithms.’ Contributed to the 5th IEEE Latin American Conference on Computational Intelligence (LA-CCI) 2018, Guadalajara, Mexiko.
- . . ‘Supporting Online Data Purchase by Preference Recommendation.’ Contributed to the 2018 IEEE International Conference on Systems, Man, and Cybernetics (SMC 2018), Miyazaki, Japan. doi: 10.1109/SMC.2018.00627.
- . . ‘A Generic Framework for Collaborative Filtering Based on Social Collective Recommendation.’ Contributed to the 10th International Conference (ICCCI) 2018, Bristol, UK. doi: 10.1007/978-3-319-98443-8_22.
- . . ‘A Semiotic-Inspired Machine for Personalized Multi-Criteria Intelligent Decision Support.’ Data & Knowledge Engineering 117: 225–238.
- . . ‘What do Business Process Modeling and Super Mario Bros. have in Common? A Games-perspective on Business Process Modeling.’ International Journal of Conceptual Modeling | Enterprise Modeling and Information Systems Architecture 13: 69–76.
- . . Digitalisierung der Lehre am Fachbereich 4 der WWU Münster: Bestandsaufnahme und Handlungsempfehlungen Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 141, .
- . . ‘Learning Database Queries via Intelligent Semiotic Machines.’ Contributed to the 4th IEEE Latin American Conference on Computational Intelligence (LA-CCI), Arequipa, Peru. doi: 10.1109/LA-CCI.2017.8285698.
- . . ‘Customer Service in Social Media - An Empirical Study of the Airline Industry.’ In Proceedings of the 17th Conference on Database Systems for Business, Technology, and Web (BTW '17), edited by , 33–40. Bonn: Gesellschaft für Informatik.
- . . ‘Towards Efficient and Informative Omni-Channel Customer Relationship Management.’ In Proceedings of the 36th International Conference on Conceptual Modeling (ER'17), edited by , 69–78. Basel : Springer International Publishing. doi: 10.1007/978-3-319-70625-2_7.
- . . „Horus Gamification: Ein Prototyp zum Einsatz von Gamification im Rahmen des Social BPM.“ Beitrag präsentiert auf der Proc. 47. Jahrestagung der Gesellschaft für Informatik 2017, Chemnitz, Germany.
- . . ‘Intelligent Decision Support for Data Purchase.’ Contributed to the 2017 IEEE/WIC/ACM International Conference on Web Intelligence (WI), Leipzig, Germany. doi: 10.1145/3106426.3106434.
- . . ‘Customer Service in Social Media: An Empirical Study of the Airline Industry.’ In Workshopband der BTW 2017, 33–40. Bonn: Gesellschaft für Informatik.
- . . ‘A Classification Framework for Beacon Applications.’ Open Journal of Internet of Things (OJIOT) 3, Nr. 1: 1–11.
- . . The Web at Graduation and Beyond ‐ Business Impacts and Developments. 1. Aufl. Düsseldorf: Springer VDI Verlag.
- . . ‘Name Your Own Price on Data Marketplaces.’ Informatica - An International Journal 28, Nr. 1: 1–26.
- . . ‘Technology Selection for Big Data and Analytical Applications.’ Open Journal of Big Data (OJBD) 3, Nr. 1: 1–25.
- (Eds.): . Computational Collective Intelligence - Proc. 9th International Conference ICCCI, Nicosia, Cyprus, September 2017, Part 2. Düsseldorf: Springer VDI Verlag.
- (Eds.): . Computational Collective Intelligence - Proc. 9th International Conference ICCCI, Nicosia, Cyprus, September 2017, Part 1. Düsseldorf: Springer VDI Verlag.
- . . ‘Assessing the Perceived Value of Cloud-based Technologies in Natural Disasters: The Case of New Zealand Emergency Management.’ Contributed to the 4th International Conference on Information and Communication Technologies for Disaster Management (ICT-DM), Münster, Germany.
- . . ‘Marketplaces for Digital Data: Quo Vadis?’ Computer and Information Science 10, Nr. 4: 22–37.
- . . „Datenmarktplätze in verschiedenen Forschungsdisziplinen: Eine Übersicht.“ Arbeitsberichte des Instituts für Wirtschaftsinformatik 41, Nr. 3: 170–180.
- . . Challenges of Data Management and Analytics in Omni-Channel CRM ERCIS Working Papers, Nr. 28. N/A: Selbstverlag / Eigenverlag, .
- . Analysis, Interpretation and Benefit of User-Generated Data: Computer Science meets Communication Studies Dagstuhl-Reports, Nr. 6, .
- . ‘Achieving Government-Citizen Dialogue in Arab Nations via Social Media: Contextual Considerations.’ Electronic Government, An International Journal 12, Nr. 4: 357–374.
- . . ‘Fair Knapsack Pricing for Data Marketplaces.’ Contributed to the 20th East-European Conference on Advances in Databases and Information Systems, Prague, Czech Republic.
- . . Grundkurs Theoretische Informatik: Eine anwendungsbezogene Einführung - Für Studierende in allen Informatik-Studiengängen. 6. Aufl. Düsseldorf: Springer VDI Verlag.
- . . ‘Designing Serious Games for Citizen Engagement in Public Service Processes.’ Contributed to the 9th Workshop on Business Process Management and Social Software (BPMS2 2016), Rio de Janeiro, Brasilien.
- . Grundkurs Theoretische Informatik. 6. Aufl. Wiesbaden: Springer Vieweg.
- In Advances in Databases and Information Systems, edited by , 46–59. Heidelberg: Springer. . ‘Fair Knapsack Pricing for Data Marketplaces.’
- . „Hauptspeicherdatenbanken: Denkgeschwindigkeit für alle?“ DOAG Business News 3-2016: 5–7.
- . . ‘A Classification Framework for Data Marketplaces.’ Vietnam Journal of Computer Science 3, Nr. 3: 137–143. doi: 10.1007/s40595-016-0064-2.
- . . „Mit GOBIA zu zielgerichteten Business-Intelligence-Architekturen.“ DOAG Business News 15, Nr. 1-2016: 9–10.
- . . ‘Data Quality Scores for Pricing on Data Marketplaces.’ In Intelligent Information and Database Systems, edited by , 215–224. Heidelberg: Springer.
- . . „NoSQL, NewSQL, MapReduce und Hadoop.“ In Analytische Informationssysteme: Business Intelligence-Technologien und -Anwendungen , herausgegeben von , 205–223. 5. Aufl. Wiesbaden: Gabler Verlag.
- . . „Gamification = Erfolg durch Spaß im Business.“ DOK.magazin für Technologien, Strategien & Services für das digitale Dokument 5: 48–52.
- . . ‘Cooperative Hybrid Cloud Intermediaries — Making Cloud Sourcing Feasible for Small and Medium-sized Enterprises.’ Open Journal of Cloud Computing 2, Nr. 2: 4–20.
- In Proceedings of the LWA 2015 Workshops: KDML, FGWM, IR, and FGDB, edited by , 409–418. Aachen: CEUR-WS. . ‘The GOBIA method: Towards goal-oriented business intelligence architectures.’
- . . ‘Towards Future IT Service Personalization: Issues in BYOD and the Personal Cloud .’ In Advanced Research on Cloud Computing Design and Applications , edited by , 102–119. Hershey PA: IGI Global.
- Contributed to the LWA 2015, Trier, Germany. . ‘Data Quality Adjustments for Pricing on Data Marketplaces.’
- . . A Classification Framework for Data Marketplaces ERCIS Working Papers, Nr. 23, .
- . . ‘Information Systems Freshmen Teaching: Case Experience from Day One.’ International Journal of Information and Operations Management 6, Nr. 1: 49–69. doi: 10.1504/IJIOME.2015.073158.
- . . Hauptspeicherdatenbanken – Denkgeschwindigkeit auch für KMU? Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 136. Münster, .
- . . Big Data in kleinen und mittleren Unternehmen – eine empirische Bestandsaufnahme Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 135. Münster, .
- . . „Big Data: Daten sammeln, aggregieren, analysieren, nutzen.“ In Big Data in Marketing - Chancen und Möglichkeiten für eine effektive Kundenansprache, herausgegeben von , 35–54. 1. Aufl. Freiburg im Breisgau: Haufe Verlag.
- . . „Gamification im Unternehmenseinsatz.“ DOAG Business News x, Nr. Frühjahr: 5–7.
- . . ‘Connecting Clinical Care and Research: Single-Source with x4T - Process Design, Architecture, and Use Cases.’ Information Technology 57, Nr. 1: 63–72.
- . . ‘BYOD and Governance of the Personal Cloud.’ International Journal of Cloud Applications and Computing 5, Nr. 2: 23–35.
- . . ‘Analyzing Observable Success and Activity Indicators on Crowdfunding Platforms.’ International Journal of Web Based Communities 11, Nr. 3/4: 264–289.
- . . ‘High Quality Information Delivery: Demonstrating the Web in Your Pocket for Cineast Tourists.’ Contributed to the BTW 2015, Hamburg, Deutschland.
- . . ‘SaaS Cloud Computing in Small and Medium Enterprises: A Comparison between Germany and New Zealand.’ International Journal of Information Technology, Communications and Convergence 3, Nr. 2: 87–104.
- . . „Preismodelle für Datenmarktplätze.“ Informatik-Spektrum 38, Nr. 2: 133–141. doi: 10.1007/s00287-013-0751-7.
- . . „Social BPM – Die Aktivierung der "Weisheit der Masse".“ DOK.magazin 3, Nr. 2015: 6–11.
- . . ‘EVACS: Economic Value Assessment of Cloud Sourcing by Small and Medium-sized Enterprises.’ EMISA Forum 34, Nr. 1: 18–31.
- . . ‘Big Data as the New Enabler in Business and other Intelligence.’ Vietnam Journal of Computer Science 1, Nr. 1: 1–12.
- . . ‘Challenges of Social Business Process Management.’ Contributed to the 47th Hawaii International Conference on System Sciences (HICSS-47), Waikoloa, Hawaii, USA.
- . . The Data Marketplace Survey Revisited ERCIS Working Papers, Nr. 18. N/A: Selbstverlag / Eigenverlag, .
- . . Implementing the WiPo Architecture ERCIS Working Papers, Nr. 20. N/A: Selbstverlag / Eigenverlag, .
- . . ‘Data Marketplaces: An Emerging Species.’ In Databases and Information Systems VIII, edited by , 145–158. 270. Aufl. .
- . . „Sicherung der Privatheit in einer experimentellen Bankfiliale bei Facebook.“ DOAG Business News 2014, Nr. 3: 2521.
- . . Information Systems Freshmen Teaching: Case Experience from Day One (Pre-Version of the publication in the International Journal of Information and Operations Management Education (IJIOME)) ERCIS Workingpapers, Nr. 21. Münster, .
- . ‘Cases for the Web your the Pocket (WiPo): Surviving Offline with Online Data.’ International Journal of Information Technology and Web Engineering 9, Nr. 3: 40–54.
- . . „Big Data: Der neue Katalysator für Business und andere Intelligenz.“ In Leitfaden Marketing Automation, herausgegeben von , 51–72.
- . . ‘Implementing the WiPo Architecture.’ Contributed to the EC Web, München.
- . . ‘The Data Marketplace Survey Revisited.’ In Proceedings of the 11th International Baltic Conference on Databases and Information Systems , edited by , 135–146. Tallinn: Tallinn University Press.
- . ‘Fusion Cubes: Towards Self-Service Business Intelligence.’ International Journal of Data Warehousing and Mining 9, Nr. 2: 66–88.
- . . ‘Human-Oriented Challenges of Social BPM: An Overview.’ In Enterprise Modelling and Information Systems Architectures (EMISA 2013), edited by , 163–176. Bonn: Köllen.
- . . ‘A Contemporary Approach to Coping with Modern Information Overload.’ Communications of the ICISA: An International Journal 14, Nr. 1: 1–24.
- . . ‘Evolution of Inter-Firm Relationships: A Study of Supplier-Logistical Services Provider-Customer Triads.’ International Journal of Industrial Engineering 20, Nr. 1-2: 126–140.
- . . ‘Marketplaces for Data: An initial Survey.’ ACM SIGMOD Record 42, Nr. 1: 15–26.
- . . „Data Streaming im Verkehr.“ In Das weite Feld der Ökonomik: Von der Wirtschaftsforschung und Wirtschaftspolitik bis zur Politischen Ökonomik und Wirtschaftsethik, herausgegeben von , 111–123. 1. Aufl. Stuttgart: Lucius & Lucius.
- . . „Mobile-Device-Management im Zeitalter von IT Consumerization.“ DOAG Business News 2013: 27–29.
- . . ‘The Process Mining Manifesto --- An interview with Wil van der Aalst.’ Information Systems 37: 288–290.
- . . ‘Pricing Approaches for Data Markets.’ Contributed to the Workshop Business Intelligence for the Real Time Enterprise, Istanbul, Turkey.
- . . ‘CityPlot - Colored ER Diagrams to Visualize Structure and Contents of Databases.’ Datenbank-Spektrum 12, Nr. 3: 215–218. doi: 10.1007/s13222-012-0102-x.
- . . Marketplaces for Data: An initial Survey ERCIS Working Papers, Nr. 14. N/A: Selbstverlag / Eigenverlag, .
- . . Towards A Multi-Discipline Network Perspective.
- . . Perspectives Workshop: Social, Supply-Chain, Administrative, Business Commerce, Political Networks: a Multi-Discipline Perspective , .
- . . „Kapitän an Bord - Der "Chief Cloud Officer".“ iX Kompakt 4: 27–29.
- . . „Eingebaut - Integration von Cloud-Diensten in bestehende Systeme und Migration.“ iX Kompakt 4: 22–26.
- . . ‘From Unreliable Web Search to Information Provisioning based on Curated Data.’ EMISA Forum 32, Nr. 2: 6–20.
- . . ‘Rethinking XML-Enabled Agile Supply Chains.’ International Journal of Information Management 32, Nr. 1: 17–23.
- . . ‘Towards The Web in Your Pocket: Curated Data as a Service.’ In Advanced Methods for Computational Intelligence, edited by , 25–34. Heidelberg: Springer.
- . . Cloud-Computing für Unternehmen : technische, wirtschaftliche, rechtliche und organisatorische Aspekte. 1. Aufl. Heidelberg: dpunkt Verlag.
- . . „Die neue Rolle des "Chief Cloud Officers".“ IT-Governance (Zeitschrift des ISACA Germany Chapter e.V.) 12: 12–16.
- . . ‘Identification, Specification, and Development of Web-Oriented Architectures.’ International Journal of Information Systems in the Service Sector 4, Nr. 1: 1–22.
- . . ‘Web-Wide Application Customization: The Case of Mashups.’ International Journal of Information System Modeling and Design 3, Nr. 1: 23–47.
- . . Business Processes for Business Communities. 1. Aufl. Düsseldorf: Springer VDI Verlag.
- . . ‘Exploiting XML Technologies in Medical Information Systems .’ In BLED 2012 Proceedings, 70–83.
- . . Grundkurs Theoretische Informatik - Eine anwendungsbezogene Einführung für Studierende in allen Informatik-Studiengängen. 5. Aufl. Wiesbaden: Springer Vieweg.
- . . ‘A Cooperative Community Cloud for Small and Medium Enterprises.’ Contributed to the Proc.\ 1st International Conference on Cloud Computing and Service Science (CLOSER), Noordwijkerhout, The Netherlands.
- . . Data Warehousing: from Occasional OLAP to Real-time BI , .
- . . ‘Web 2.0: From a Buzzword to Mainstream Web Reality.’ In e-Business and Telecommunications, edited by , 53–67.
- . . ‘A Cooperative Community Cloud for Small and Medium Enterprises.’ Contributed to the 1st International Conference on Cloud Computing and Service Science (CLOSER), Noordwijkerhout, The Netherlands.
- . . Empirische Bestandsaufnahme des Software-as-a-Service-Einsatzes in kleinen und mittleren Unternehmen Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 131. Münster: Institut für Wirtschaftsinformatik, .
- . . ‘Cooperative Community Clouds for Small and Medium Enterprises.’ Contributed to the 1st Int'l. Conf. on Cloud Computing and Service Science, Noordwijkerhout, The Netherlands.
- . . ‘Software-as-a-Service in Small and Medium Enterprises: An Empirical Attitude Assessment.’ In Web Information System Engineering – WISE 2011: 12th International Conference, Sydney, Australia, October 13-14, 2011. Proceedings, edited by , 43–56. Heidelberg: Springer. doi: 10.1007/978-3-642-24434-6_4.
- . . „Cloud-Computing.“ WISU Das Wirtschaftsstudium 2012, Nr. 6: 1316–1322.
- 10.1007/s11576-011-0296-9. . ‘In-Memory-Datenmanagement in betrieblichen Anwendungssystemen.’ Wirtschaftsinformatik 53, Nr. 6: 383–390. doi:
- . . ‘The Single Source Architecture x4T to Connect Medical Documentation and Clinical Research.’ In User Centred Networked Health Care - Proceedings of MIE 2011, edited by , 902–906. Bristol: IOP Publishing. doi: 10.3233/978-1-60750-806-9-902.
- . . ‘Multi-Level Modeling of Web Service Compositions with Transactional Properties.’ Journal of Database Management (Special Issue on Service-Oriented Computing) 22, Nr. 2: 1–31.
- . . Geschäftsprozesse für Business Communities: Modellierungssprachen, Methoden, Werkzeuge. München: Oldenbourg Verlag.
- . . ‘ Current and Future Issues in BPM Research: a European Perspective from the ERCIS Meeting 2010 .’ Communications of the Association for Information Systems 28, Nr. 1: 393–414. doi: 10.17705/1CAIS.02825.
- . . Web-Wide Application Customization: The Case of Mashups ERCIS Working Papers, Nr. 8. N/A: Selbstverlag / Eigenverlag, .
- . . Database-as-a-Service für kleine und mittlere Unternehmen Arbeitsberichte des IAI. N/A: Selbstverlag / Eigenverlag, .
- . . ‘Web Page Augmentation with Client-Side Mashups as Meta-Querying.’ Contributed to the 2nd Asian Conference on Intelligent Information and Database Systems (ACIIDS), Hue, Vietnam.
- . . ‘Women Leading and Learning through Present-Day Web Linking Technology.’ International Journal of Knowledge and Learning 6: 1–27.
- . . „Die Rolle des Rechts in einer durch das Web 2.0 dominierten Welt.“ Datenschutz und Datensicherheit 34, Nr. 7: 463–466. doi: 10.1007/s11623-010-0130-3.
- . . „Der Umgang mit Information in Aus- und Weiterbildung: inflationär oder deflationär?“ In Die digital-vernetzte Wissensgesellschaft - Aufbruch ins 21. Jahrhundert, herausgegeben von , 433–443. München: Piper Verlag.
- . . Serwis Web 2.0 - Od Pomyslu Do Realizacji. Gliwice, Poland: Wydawnictwo Helion.
- . . ‘Looking into a REST-based API for Database-as-a-Service Systems.’ In 12th IEEE Conference on Commerce and Enterprise Computing, 17–24. Shanghai, China.
- . . ‘Towards a Conceptual Model for Trustworthy Skills Profiles in Online Social Networks.’ In Information Systems Development - Business Systems and Services: Modeling and Development, edited by , 285–296. Heidelberg: Springer.
- . . ‘Creating High-Quality Learning Object Metatdata Based on Web 2.0 Concepts.’ In ICTs for Modern Educational and Instructional Advancement: New Approaches to Teaching; Information Science Reference, edited by , 32–47. Hershey PA: IGI Global.
- . . DaaS-Workshop und das Studi-Programm Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 122. Münster: Institut für Wirtschaftsinformatik, .
- . . Database-as-a-Service (Workshop des AK Web und Datenbanken im Rahmen der 13. GI Fachtagung BTW 2009) , .
- . . Web Information Systems Engineering (WISE).
- . . Advances in Databases and Information Systems (ADBIS).
- . . Visioning and Engineering the Knowledge Society - A Web Science Perspective.
- . . ‘Single Source Information Systems to Connect Patient Care and Clinical Research.’ In Medical Informatics in a United and Healthy Europe - Proceedings of MIE 2009 – The XXIInd International Congress of the European Federation for Medical Informatics, edited by , 61–65. Bristol: IOP Publishing. doi: 10.3233/978-1-60750-044-5-61.
- . . ‘Web 2.0: a Buzzword, a Serious Development, Just Fun, or What?’ Contributed to the International Conference on e-Business (ICE-B), Milan, Italien.
- . . ‘Manifest: The role of law in an electronic world dominated by Web 2.0.’ Computer science - research and development = Informatik, Forschung und Entwicklung 23, Nr. 1: 7–13. doi: 10.1007/s00450-009-0054-z.
- . . ‘ActiveTags: Making Tags More Useful - Everywhere on the Web.’ Contributed to the 20th Australasian Database Conference (ADC); Conferences in Research and Practice in Information Technology, Wellington, New Zealand.
- . . ‘Modelling of Web-oriented Architectures.’ Contributed to the 6th Asia-Pacific Conference on Conceptual Modelling (APCCM); Conferences in Research and Practice in Information Technology, Wellington, New Zealand.
- . . ‘A Design and Development Methodology for Mobile RFID Applications based on the ID-Services Middleware Architecture.’ Contributed to the Proc. 10th International Conference on Mobile Data Management (MDM), Taipei, Taiwan.
- . . ‘Towards Learning Object Metadata Quality Control - The Next Steps.’ Contributed to the Annual Conference European Distance and E-Learning Network(EDEN), Gdansk, Poland.
- . . ‘Governance in Web-Oriented Architectures.’ Contributed to the IEEE Asia-Pacific Services Computing Conference (APSCC), Singapore.
- . . ‘ID-Services: An RFID Middleware Architecture for Mobile Applications.’ Information Systems Frontiers 12, Nr. 5: 529–539. doi: 10.1007/s10796-009-9214-8.
- . . „Tools für die Lehre in Datenbanken.“ Datenbank-Spektrum (Themenheft Lehre in Datenbanken und Information Retrieval) : 5–13.
- . . ‘Editorial for Special Issue on ADBIS 2009: Advances in Databases and Information Systems .’ Information Systems .
- . . ‘Editorial for Special Issue on WISE 2009: Web Information Systems Engineering.’ Information Systems .
- . . ‘Making Tags More Useful - Everywhere on the Web.’ In Conferences in Research and Practice in Information Technology, 39–46. N/A: Selbstverlag / Eigenverlag.
- (Hrsg.): . Datenbanksysteme in Business, Technologie und Web (BTW) (Proc. 13. Fachtagung des GI-Fachbereichs Datenbanken und Informationssysteme, Münster, März 2009). Bonn: Gesellschaft für Informatik.
- . . ‘ACID Properties (Short Entry).’ In Encyclopedia of Database Systems, edited by , 19–21. Düsseldorf: Springer VDI Verlag.
- . . ‘Concurrency Control - Traditional Approaches (Short Entry).’ In Encyclopedia of Database Systems. Düsseldorf: Springer VDI Verlag.
- . . ‘Transaction (Short Entry).’ In Encyclopedia of Database Systems. Düsseldorf: Springer VDI Verlag.
- . . ‘Transaction Management.’ In Encyclopedia of Database Systems, edited by , 3153–3157. Düsseldorf: Springer VDI Verlag.
- . . ‘Transaction Models - the Read/Write Approach.’ In Encyclopedia of Database Systems, edited by , 3158–3162. Düsseldorf: Springer VDI Verlag.
- . . ‘Single Source Informationssysteme - Nutzung von Routinedaten für die klinische Forschung.’ Contributed to the 54. Jahrestagung der Deutschen Gesellschaft für Medizinische Informatik, Biometrie und Epidemiologie e.V. (GMDS), Essen. doi: 10.3205/09gmds287.
- . . The Open Knowledge Society - A Computer Science and Information Systems Manifesto.
- . . ‘Web-oriented Architectures: On the Impact of Web 2.0 on Service-oriented Architectures.’ Contributed to the 2008 IEEE Asia-Pacific Services Computing Conference (APSCC).
- . . ‘Process Learning in a Web 2.0-Inspired Learning Environment.’ In e-Learning Baltics 2008, edited by , 139–146. Stuttgart.
- . . ‘Towards Web 2.0 Driven Learning Environments.’ Contributed to the 4th International Conference on Web Information Systems and Technologies (WEBIST), Funchal, Madeira, Portugal.
- . . ‘Web 2.0 als Innovationstreiber.’ Wirtschaftswissenschaftliches Studium (WiSt) - Zeitschrift für Ausbildung und Hochschulkontakt , Nr. 4: 134–139.
- . . ‘Learnr - Web 2.0-Driven Learning.’ Contributed to the 7th IASTED International Conference onWeb-Based Education (WBE), Innsbruck, Austria.
- . . „Der Weg ist das Ziel: Abiturvorbereitung durch individuelles und gemeinschaftliches Lernen im Web.“ Beitrag präsentiert auf der Interesse wecken und Grundkenntnisse vermitteln (Proc. 3. Münsteraner Workshop zur Schulinformatik - MWS), Münster, Germany.
- . . ‘ID-Services: An RFID Middleware Architecture for Mobile Applications.’ Contributed to the 2nd International Workshop on RFID Technology - Concepts, Applications, Challenges (IWRT), Barcelona, Spain.
- . . „Web-orientierte Architekturen: Auswirkungen des Web 2.0 auf Service-orientierte Architekturen.“ Beitrag präsentiert auf der EMISA 2008, St. Augustin.
- . . ‘Learning Object Metadata Generation in the Web 2.0 Era.’ International Journal of Information Communication and Technology Education (JICTE) 4, Nr. 3: 1–10.
- . . ‘Evolution of Learning Folksonomies: Social Tagging in e-Learning Repositories.’ International Journal of Technology Enhanced Learning(IJTEL) 1, Nr. 1/2: 35–46.
- . . ‘Why Service-Orientation Could Make E-Learning Standards Obsolete.’ International Journal of Technology Enhanced Learning (IJTEL) 1, Nr. 1/2: 85–97.
- . . ‘Web Service Discovery - Reality Check 2.0.’ International Journal of Web Service Practices (IJWSP) 3, Nr. 1: 42–47.
- . . „Datenbanksystem.“ In Enzyklopädie der Wirtschaftsinformatik - Online-Lexikon. Berlin: Oldenbourg Wissenschaftsverlag.
- . . „Structured Query Language.“ In Enzyklopädie der Wirtschaftsinformatik - Online-Lexikon. Berlin: Oldenbourg Wissenschaftsverlag.
- . . „Bewertungsmechanismen zur beruflichen Weiterqualifizierung in sozialen Web 2.0-Netzwerken.“ In Informatik 2008 - Beherrschbare Systeme - dank Informatik (Band 2), herausgegeben von , 955–961. Bonn: Gesellschaft für Informatik.
- . . Datenmodelle, Datenbanksprachen und Datenbankmanagementsysteme. Boston, MA: Addison-Wesley.
- . . ‘Securing the Infrastructure for Service-Based E-Learning Environments.’ In Intelligent Information Technologies and Applications, edited by , 1–24. Hershey PA: IGI Global.
- . . ‘Secure Identity Management in a Service-Based E-Learning Environment.’ In Electronic Commerce: Concepts, Methodologies, Tools, and Applications, edited by , 481–496. Hershey PA: IGI Global.
- . . „Serviceorientierung: Vereinfachung von Software-Entwicklung?“ In Einfachheit in Wirtschaftsinformatik und Controlling, Festschrift für Heinz Lothar Grob, herausgegeben von , 135–153. München: Verlag Franz Vahlen.
- . . „Geschäftsmodelle für serviceorientiertes E-Learning.“ In E-Learning-Management, herausgegeben von , 85–105. München: Verlag Franz Vahlen.
- . . „E-Learning-Grids - Potentiale und Grenzen von Grid Computing im elektronischen Lernen.“ In E-Learning-Management, herausgegeben von , 177–188. München: Verlag Franz Vahlen.
- . . „Veranstaltungsbegleitende Übungen am Beispiel des xLx-Systems.“ In E-Learning-Management, herausgegeben von , 233–253. München: Verlag Franz Vahlen.
- . . „E-Learning-Repositories: Transparenz und Integration von elektronischen Lernangeboten.“ In E-Learning-Management, herausgegeben von , 299–312. München: Verlag Franz Vahlen.
- . . Web Service Discovery - Reality Check 2.0 ERCIS Working Papers, Nr. 5. N/A: Selbstverlag / Eigenverlag, .
- . . From Version 1.0 to Version 2.0: A Brief History of the Web ERCIS Working Papers, Nr. 4. N/A: Selbstverlag / Eigenverlag, .
- . . Entwicklungen im Web 2.0 aus technischer, ökonomischer und sozialer Sicht , .
- . . ‘Data Warehouse Detective: Schema Design Made Easy.’ Contributed to the 12th GI Conference on Database Systems in Business, Technology, and Web (BTW), Aachen, Germany.
- . . ‘Added Value for e-Learning Repositories through Social Tagging of Learning Objects.’ Contributed to the Workshop of Multimedia Semantics - The Role of Metadata, 12th BTW (Datenbanksysteme in Business, Technology and Web), Aachen, Germany.
- . . ‘Learning Object Metadata Generation in the Web 2.0 Era.’ Contributed to the IADIS International Conference e-Learning, Lisbon, Portugal.
- . . ‘Establishing Business Models for Service-Oriented E-Learning.’ Contributed to the IADIS International Conference e-Learning, Lisbon, Portugal.
- . . ‘Implementing Physical Hyperlinks for Mobile Applications using RFID Tags.’ Contributed to the 11th International Conference on Database Engineering and Applications (IDEAS), Banff, Canada.
- . . ‘Web Service Discovery - Reality Check 2.0.’ Contributed to the 3rd International Conference on Next Generation Web Services Practices (NWeSP), Seoul, Korea.
- . . ‘Collaborating with Citizens: The E-Government Policymakers' View.’ Contributed to the 10th Collaborative Electronic Commerce Technology and Research (CollECTeR) Conference, Melbourne, Australia.
- . . „share.loc - Transparenz und Integration von Lernobjekten an der Universität Münster.“ EMISA Forum 2: 15–24.
- . . „DB2 goes SQL:2003 : Native SQL/XML-Unterstützung der IBM DB2-Datenbank.“ EMISA Forum 2: 25–39.
- . . „Lernobjekt-Metadatenerstellung in Zeiten des Web 2.0.“ i-com Zeitschrift für interaktive und kooperative Medien 2: 31–38.
- . . ‘Revisiting the (Machine) Semantic Web: The Missing Layers for the Human Semantic Web.’ Data & Knowledge Engineering 19: 145–148.
- . . Unleashing Web 2.0 - From Concepts to Creativity. Burlington, MA: Morgan Kaufman.
- . . ‘Service-Oriented Provisioning of Learning Objects.’ In Learning Objects: Applications, Implications, and Future Directions, edited by , 287–324. Hoboken, NJ, USA: Wiley-Blackwell.
- . . „Datenbanksysteme.“ In Handwörterbuch der Betriebswirtschaft, 253–264. Stuttgart: Schäffer-Poeschel Verlag.
- . . ‘Database Processing.’ In Wiley Encyclopedia of Electrical and Electronics Engineering, edited by , 629–640. New York City: John Wiley & Sons.
- . . ‘Have Service-Oriented Architectures Taken a Wrong Turn Already?’ Contributed to the 8th International Conference on Research and Practical Issues of Enterprise Information Systems (CONFENIS), Vienna, Austria.
- . . ‘Can Service-Orientation Make E-Learning Standards Obsolete?’ Contributed to the Montreal Conference on eTechnologies (MCeTech), Montreal, Canada.
- . . ‘Towards the Next Generation of E-Learning Standards: SCORM for Service-Oriented Environments.’ Contributed to the 6th IEEE International Conference on Advanced Learning Technologies (ICALT), Kerkrade, Netherlands.
- . . ‘share.loc - A Multi Tiered Interoperable E-Learning Metadata Repository.’ Contributed to the 6th IEEE International Conference on Advanced Learning Technologies (ICALT), Kerkrade, Netherlands.
- . . ‘Workflows in Scientific Computing Grids.’ Contributed to the 5th Grid and Cooperative Computing (GCC) Workshops, Changsha, China.
- . . ‘OntoMedia - Semantic Multimedia Metadata Integration and Organization.’ International Journal on Semantic Web & Information Systems (IJSWIS, Special Issue: Multimedia Semantics 2006) 2, Nr. 3: 1–16.
- . . ‘Schema Versioning in Data Warehouses: Enabling Cross-Version Querying via Schema Augmentation.’ Data & Knowledge Engineering 59, Nr. 2: 435–459.
- . . ‘Secure Identity Management in a Service-Based E-Learning Environment.’ International Journal of Intelligent Information Technologies 2, Nr. 4: 57–76.
- . . ‘From Processes via Workflows to Services.’ Transactions of the Society for Design and Process Science (TSDPS) : 1–9.
- . . ‘Using Software Testing Techniques for Efficient Handling of Programming Exercises in an E-Learning Platform.’ Electronic Journal of e-Learning 4, Nr. 1: 87–94.
- . . Rechneraufbau und Rechnerstrukturen. München: Oldenbourg Verlag.
- . . ‘Workflow and Service Composition Languages.’ In Handbook on Architectures of Information Systems (Series International Handbooks on Information Systems), edited by , 369–390. Düsseldorf: Springer VDI Verlag.
- . . ‘Towards the Utilization of Grid Computing in Electronic Learning.’ In Grid Computing: Software Environments and Tools. Düsseldorf: Springer VDI Verlag.
- . . 9th International Database Enginneering & Application Symposium.
- . . Datenbanksysteme in Business, Technologie und Web.
- . . ‘BOGSY: A Flexible Information System for Botanical Gardens.’ Contributed to the 8th Spring International Conference on Information Systems Implementation and Modelling (ISIM), Hradec nad Moravicí, Czech Republic.
- . . ‘Building a Service Platform for Electronic Learning.’ Contributed to the 2nd International Conference on Information Technology (ICIT), Amman, Jordan.
- . . ‘Mediators for Integrating Content into Service-based e-Learning Environments.’ Contributed to the 5th IEEE International Conference on Advanced Learning Technologies (ICALT), Kaohsiung, Taiwan.
- . . ‘Provisioning in a Service-based E-Learning Platform.’ Contributed to the 2nd International Conference on Innovations in Information Technology (IIT), Dubai, UAE.
- . . ‘Efficient Handling of Programming Exercises in a Scalable E-Learning Platform.’ Contributed to the 4th European Conference on E-Learning (ECEL), Amsterdam, Netherlands.
- . . ‘Ontology Engineering from a Database Perspective.’ Contributed to the 10th Asian Computing Science Conference (ASIAN), Kunming, China.
- . . ‘ISETTA: Service Orientation in the "Bologna Process" of a Large University.’ Contributed to the 14th International Conference on Information Systems Development - ISD), Karlstad, Sweden.
- . . ‘Towards Practical Meta-Querying.’ Information Systems 30: 317–332.
- . . ‘Turning Learning Objects into Web Services.’ Learning Objects & Learning Designs (The Official Publication of AIS SIG-RLO) 1, Nr. 1: 16–24.
- . . ‘Aspect-Oriented Reengineering of E-Learning Courseware.’ The Learning Organization: An International Journal (Emerald Group Publishing) 12, Nr. 5: 457–470.
- . . ‘Reengineering of Educational Material: A Systematic Approach.’ International Journal of Knowledge and Learning (IJKL Inderscience Publishers) 1, Nr. 3: 229–248.
- . . BoGSy - ein Informationssystem für Botanische Gärten Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 107. Münster: Institut für Wirtschaftsinformatik, .
- . . ‘Schema Versioning in Data Warehouses.’ Contributed to the 3rd International Workshop on Evolution and Change in Data Management (ECDM), Shanghai, China.
- . . ‘Intelligent Content Discovery within E-Learning Web Services.’ Contributed to the 1st International Conference on Knowledge Management (ICKM), Singapore.
- . . ‘Ontology-Driven Multimedia Object Management for Private Users - Overview and Research Issues.’ AIS SIGSEMIS Bulletin 1, Nr. 1: 29–31.
- . . ‘XLX and L2P - Platforms for Blended Learning.’ EMISA Forum 2: 18–20.
- . . ‘Maintenance and Exchange of Learning Objects in a Web Services Based e-Learning System.’ Electronic Journal of e-Learning 2, Nr. 2: 293–303.
- . . ‘Editorial for Special Issue on ADBIS 2002: Advances in Databases and Information Systems .’ Information Systems 29: 437–438.
- . . European Research Center for Information Systems (ERCIS) : Gründungsveranstaltung : Münster 12. Oktober 2004 Working Paper, Nr. 1. N/A: Selbstverlag / Eigenverlag, .
- . . „Schemaentwurf bei modernen Data Warehouses.“ In Business Intelligence & Data Mining, 15–34. N/A: Selbstverlag / Eigenverlag.
- . . ‘Meta-SQL: Towards Practical Meta-Querying.’ Contributed to the 9th International Conference on Extending Database Technology (EDBT), Heraklion.
- . . ‘Individualization of E-Learning Processes by Workflow-Based Learning-Object Management.’ Contributed to the 7th International Conference on Business Information Systems (BIS), Poznan, Poland.
- . . ‘A Multi-Level Model for Web Service Composition.’ Contributed to the 3rd IEEE International Conference onWeb Services (ICWS), San Diego, USA.
- . . E-Learning as a Web Service Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 92. Münster: Institut für Wirtschaftsinformatik, .
- . . Towards E-Learning Grids Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 98. Münster: Institut für Wirtschaftsinformatik, .
- . . Tagungsband EMISA 2003: Auf dem Weg in die E-Gesellschaft Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 99. Münster: Institut für Wirtschaftsinformatik, .
- . . A Multi-Level Model for Web Service Composition Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 100. Münster: Institut für Wirtschaftsinformatik, .
- . . ‘Multidimensional Normal Forms for Data Warehouse Design.’ Information Systems 28, Nr. 5: 415–434.
- . . „Qualitätsorientierter Schemaentwurf für Datenlager.“ it - Information Technology 45, Nr. 4: 190–195.
- . . „Web-basiertes Lernen: Eine Übersicht über Stand und Entwicklungen.“ In Web & Datenbanken - Konzepte, Architekturen, Anwendungen, herausgegeben von , 363–397. Heidelberg: dpunkt Verlag.
- . . ‘Advanced Database Systems.’ In Handbook on Data Management in Information Systems (Series International Handbooks on Information Systems), edited by , 221–283. Düsseldorf: Springer VDI Verlag.
- . . „Sichten-Wartung in Datenlagern - Controlling aus datenbanktechnischer Sicht.“ In Trendberichte zum Controlling, herausgegeben von , 495–510. Heidelberg: Physica-Verlag.
- . . ‘E-Learning as a Web Service (Extended Abstract).’ Contributed to the 7th International Conference on Database Engineering and Applications (IDEAS), Hong Kong, China.
- . . ‘Learning Objects as a Uniform Foundation for E-Learning Platforms.’ Contributed to the 7th International Conference on Database Engineering and Applications (IDEAS), Hong Kong, China.
- . . ‘A Web Services Approach to E-Learning.’ Contributed to the Workshop on E-Learning and Beyond 2003, HTWK Leipzig.
- . . „Workflow-gestütztes Lernobjekt-Management.“ Beitrag präsentiert auf der 6. Internationale Tagung Wirtschaftsinformatik: Medien - Märkte - Mobilität, Dresden.
- . . ‘Towards E-Learning Grids: Using Grid Computing in Electronic Learning.’ Contributed to the IEEE International Workshop on Knowledge Grid and Grid Intelligence (in conjunction with 2003 IEEE/WIC International Conference on Web Intelligence / Intelligent Agent Technology), Nova Scotia, Canada.
- . . ‘Distributed Storage and Dynamic Exchange of Learning Objects.’ Contributed to the 2nd European Conference on E-Learning (ECEL), Glasgow, UK.
- . . „Zur Nutzung von Web Services im E-Learning.“ Beitrag präsentiert auf der 33. GI-Jahrestagung - Symposium "Entwicklung Web-Service basierter Anwendungen", Frankfurt am Main.
- . . ‘UDDI for E-Learning: A Repository for Distributed Learning Objects.’ Contributed to the 2nd IASTED International Conference on Information and Knowledge Sharing (IKS), Scottsdale, Arizona.
- . . ‘Aggregate Queries over Conditional Tables.’ Journal of Intelligent Information Systems 19, Nr. 3: 343–362.
- . . Transactional Information Systems - Theory, Algorithms, and the Practice of Concurrency Control and Recovery. Burlington, MA: Morgan Kaufman.
- . . ‘On the Computation of Relational View Complements.’ Contributed to the 21st Annual ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems (PODS), Madison, WI.
- . . ‘Towards a Uniform and Flexible Data Model for Learning Objects.’ Contributed to the 30th Annual Conference of the International Business School Computing Association (IBSCA), Savannah, Georgia.
- . . ‘Consistency in Data Warehouse Dimensions.’ Contributed to the 6th International Conference on Database Engineering and Applications (IDEAS), Edmonton, Canada.
- . . ‘Flexible Workflow Management as a Central E-Learning Support Paradigm.’ Contributed to the 1st European Conference on E-Learning (ECEL), Uxbridge, UK.
- . . ‘XLX - A Platform for Graduate-Level Exercises.’ Contributed to the International Conference on Computers in Education (ICCE), Auckland, Neuseeland.
- . . XLX - Eine Lernplattform für den universitären Übungsbetrieb Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 79. Münster: Institut für Wirtschaftsinformatik, .
- . . Vernetzte Hausinformationssysteme - Stand und Perspektive Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 83. Münster: Institut für Wirtschaftsinformatik, .
- . . ‘Monotonic Complements for Independent Data Warehouses.’ The VLDB Journal 10, Nr. 4: 295–315.
- . . Projektgruppe PESS: Eine XML-basierte Systemarchitektur zur Realisierung flexibler Web-Applikationen Arbeitsberichte des Instituts für Wirtschaftsinformatik, Nr. 71. Münster: Institut für Wirtschaftsinformatik, .
- . . ‘Editorial for Special Issue on ADBIS 1999.’ Information Systems 25: 465–466.
- . . „Workflow-Management im Zeitalter von Internet und Electronic Commerce.“ In Informatiktage 1999 - Fachwissenschaftlicher Informatik-Kongreß, herausgegeben von , 27–34. N/A: Sonstiger Verlag / other publisher.
- . . ‘On Herbrand Semantics and Conflict Serializability of Read-Write Transactions.’ Contributed to the 19th Annual ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems (PODS), Dallas, TX.
- . . ‘Conceptual Data Warehouse Design.’ Contributed to the 2nd International Workshop on Design and Management of Data Warehouses (DMDW), Stockholm.
- . . ‘Design and Implementation of a Novel Approach to Keyword Searching in Relational Databases.’ Contributed to the 4th East-European Conference on Advances in Databases and Information Systems (ADBIS), Prag.
- . . ‘SISQL: Schema-Independent Database Querying (on and off the Web).’ Contributed to the 4th International Conference on Database Engineering and Applications (IDEAS), Yokohama, Japan.
- . . ‘Typed Query Languages for Databases Containing Queries.’ Information Systems 24: 569–595.
- . . „Sichten-Wartung in Datenwarenhäusern.“ Informatik - Informatique (Journal der Schweizer Informatikergesellschaft) 3: 14–17.
- . . „Unabhängigkeit von Datenwarenhäusern mit Sternschema.“ EMISA Forum 2: 11–25.
- . . ‘Database Processing.’ In Wiley Encyclopedia of Electrical and Electronics Engineering, 629–640. New York City: John Wiley & Sons.
- . . „Relationale Datenbanken im Wandel der Zeiten.“ In Angewandte Mathematik, insbesondere Informatik - Beispiele erfolgreicher Wege zwischen Mathematik und Informatik, herausgegeben von , 301–320. Wiesbaden: Vieweg Verlag.
- . . ‘Complements for Data Warehouses.’ Contributed to the 15th IEEE International Conference on Data Engineering (ICDE), Sydney, Australien.
- . . ‘The WASA2 Object-Oriented Workflow Management System.’ Contributed to the ACM SIGMOD International Conference on Management of Data, Philadelphia, PA.
- . . ‘Resolving Distributed Deadlocks in the OR Request Model.’ Contributed to the 18th IEEE Symposium on Reliable Distributed Systems, Lausanne.
- . . „Suchmaschinen und Anfragen im World-Wide Web.“ Informatik-Spektrum 21: 9–15.
- . . ‘Editorial for Special Issue on Semistructured Data.’ Information Systems 23: 517–519.
- . . ‘Workflow Languages.’ In Handbook on Architectures of Information Systems (Series International Handbooks on Information Systems), edited by , 359–379. Düsseldorf: Springer VDI Verlag.
- . . ‘The WASA Approach to Workflow Management for Scientific Applications.’ In Workflow Management Systems and Interoperability, edited by , 145–164. Düsseldorf: Springer VDI Verlag.
- . . ‘Performance Study of a Distributed Deadlock Resolution Algorithm for Replicated Object-Oriented Databases.’ Contributed to the 16th IASTED International Conference Applied Informatics, Garmisch-Partenkirchen.
- . . ‘Typed Query Languages for Databases Containing Queries.’ Contributed to the 17th Annual ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems (PODS), Seattle, WA.
- . . ‘Workflow Management in Geoprocessing Applications.’ Contributed to the 6th ACM International Symposium on Geographic Information Systems (ACMGIS), Washington, DC.
- . . ‘Object-Based Data Models.’ Informatik - Informatique (Journal der Schweizer Informatikergesellschaft) 4: 32–36.
- . . ‘Object Confgurations in Software Engineering Databases.’ Engineering with Computers 13: 125–133.
- . . ‘I-Serializability: Generalized Correctness for Transaction-Based Environments.’ Information Processing Letters 63: 221–227.
- . . ‘The CORBA Specification for Cooperation in Heterogeneous Information Systems.’ Contributed to the 1st International Workshop on Cooperative Information Agents (CIA), Kiel.
- . . ‘Modeling Samples Processing in Laboratory Environments as Scientific Workflows (Extended Abstract).’ Contributed to the 8th International Workshop on Database and Expert Systems Applications, Toulouse.
- . . ‘Transactional Workflows.’ Contributed to the 5th International Conference on Deductive and Object-Oriented Databases (DOOD), Montreux.
- . . ‘Reflective Programming in the Relational Algebra.’ Journal of Computer and System Sciences 52: 537–549.
- . . „Geschäftsprozeßmodellierung und Workflow-Management: Eine Einführung.“ In Geschäftsprozeßmodellierung und Workflow-Management - Modelle, Methoden, Werkzeuge, herausgegeben von , 17–26. Totonto: Thomson Reuters.
- . . Objekt-orientierte Datenbanken: Modelle und Sprachen. München: Oldenbourg Verlag.
- . . ‘Database Theory: An Introduction.’ In Encyclopedia of Computer Science and Technology, edited by , 85–127. New York City: Marcel Dekker Verlag.
- . . ‘Scientific Workflow Systems.’ Contributed to the NSF Workshop on Workflow and Process Automation in Information Systems: State-of-the-Art and Future Directions, Athens, Georgia.
- . . ‘GEO-WASA: Combining GIS Technology with Workflow Management.’ Contributed to the 7th Israeli Conference on Computer Systems and Software Engineering, Herzliya, Israel.
- . . ‘Using Workflow Management in DNA Sequencing (Extended Abstract).’ Contributed to the 1st IFCIS International Conference on Cooperative Information Systems (CoopIS), Brüssel.
- . . ‘A Survey of Database Design Transformations Based on the Entity-Relationship Model.’ Data & Knowledge Engineering 15: 213–250.
- . . „Architektur von Datenbanksystemen.“ In Kleines Lexikon der Informatik, 139–142. München: Oldenbourg Verlag.
- . . Datenbank-Theorie. Totonto: Thomson Reuters.
- . . ‘Database Transaction Models.’ In Computer Science Today - Recent Trends and Developments, edited by , 560–574. Düsseldorf: Springer VDI Verlag.
- . . „Transformation relationaler Datenbank-Schemas in objektorientierte Schemas gemäß ODMG-93.“ Beitrag präsentiert auf der 6. GI-Fachtagung BTW - Datenbanksysteme in Büro, Technik und Wissenschaft.
- . . ‘WASA: A Workflow-Based Architecture to Support Scientific Database Applications (Extended Abstract).’ Contributed to the 6th International Conference on Database and Expert Systems Applications (DEXA), London.
- . . „Verteilte Informationssysteme: Konzepte und Entwurfstechniken.“ Beitrag präsentiert auf der GISI 95 - Herausforderungen eines globalen Informationsverbundes für die Informatik.
- . . ‘Transforming Relational Database Schemas into Object-Oriented Schemas according to ODMG-93.’ Contributed to the 4th International Conference on Deductive and Object-Oriented Databases (DOOD), Singapur.
- . . ‘Multiversion Object Constellations: A New Approach to Support a Designer's Database Work.’ Engineering with Computers 10: 230–244.
- . . ‘Serializability of Global Transactions in Multidatabases: A Pragmatic Approach.’ Foundations of Computing and Decision Sciences 19, Nr. 3: 239–259.
- . . ‘On the Logical Organization of Database Support for Software Engineering Applications - Position Paper.’ Contributed to the Workshop on Research Issues in the Intersection Between Software Engineering and Databases, Sorrent.
- . . ‘Formalization of OODB Models.’ Contributed to the KI-94 Workshops.
- . . ‘Static and Dynamic Aspects of Goal-Oriented Concurrency Control.’ Annals of Mathematics and Artifcial Intelligence 7: 257–287.
- . . Grundlagen der Transaktionsverarbeitung. Boston, MA: Addison-Wesley.
- . . „Zur Entwicklung eines klassenlosen Objekt-Modells.“ Beitrag präsentiert auf der 5. GI-Fachtagung BTW -Datenbanksysteme in Büro, Technik und Wissenschaft.
- . . ‘Reflective Programming in the Relational Algebra.’ Contributed to the 12th Annual ACM SIGACT-SIGMOD-SIGART Symposium on Principles of Database Systems (PODS), Washington DC.
- . . ‘Towards Class-less Object Models for Engineering Design Applications.’ Contributed to the 4th International Conference on Database and Expert Systems Applications (DEXA), Prag.
- . . ‘An Extension of Path Expressions to Simplify Navigation in Object-Oriented Queries.’ Contributed to the 3rd International Conference on Deductive and Object-Oriented Databases (DOOD), Phoenix, AZ.
- . . ‘Conceptual Level Concurrency Control of Relational Update Transactions.’ Theoretical Computer Science 95: 1–42.
- . . ‘On Formal Models for Object-Oriented Databases.’ EMISA-Forum 2: 22–40.
- . . ‘Commit-Serializability of Schedules for Relational Update Transactions.’ Foundations of Computing and Decision Sciences 17, Nr. 3: 153–169.
- . . ‘Databases and Database Management.’ In Computing (Handbooks in Operations Research and Management Science, Volume 3), edited by , 133–193. Amsterdam.
- . . ‘SUXESS: Towards a Sound Unifcation of Extensions of the Relational Data Model.’ Data & Knowledge Engineering 6: 75–92.
- . . ‘Bibliography on Object-Oriented Database Management.’ ACM SIGMOD Record 20, Nr. 1: 24–46.
- . . ‘A Formal Framework for Independence with respect to Transactions in the Universal Relation Model.’ Theoretical Computer Science 82: 303–327.
- . . Data Models, Database Languages and Database Management Systems. Boston, MA: Addison-Wesley.
- . . „Modellbildung für Datenbank-Transaktionen.“ In Entwicklungstendenzen bei Datenbank-Systemen, herausgegeben von , 277–316. München: Oldenbourg Verlag.
- . . „Zur Klassifkation von strukturellen Erweiterungen des relationalen Datenmodells.“ Informationstechnik it 32, Nr. 2: 97–106.
- . . Das DB2-Handbuch. Boston, MA: Addison-Wesley.
- . . Transaktionsverarbeitung in Datenbanksystemen unter Ausnutzung semantischer Information (Habilitationsschrift). Heidelberg: Hüthig Buch Verlag.
- . . ‘Dynamic Scheduling of Transactions in Design Databases based on Version Consistency (Extended Abstract).’ Contributed to the 1st International Conference on Data Base and Expert System Applications (DEXA), Wien, Österreich.
- . . ‘Towards Efficient Algorithms for Deadlock Detection and Resolution in Distributed Systems.’ Contributed to the 5th IEEE International Conference on Data Engineering, Los Angeles.
- . . ‘Goal-Oriented Concurrency Control (Extended Abstract).’ Contributed to the 2nd Symposium on Mathematical Fundamentals of Database Systems (MFDBS), Visegrad, Ungarn.
- . . ‘SUXESS: Towards a Sound Unification of Extensions of the Relational Data Model (Preliminary Version).’ Contributed to the Workshop on Foundations of Models and Languages for Data and Objects (erschienen als Informatik-Bericht 89/2, Techn. Univ. Clausthal), Aigen, Österreich.
- . . ‘Providing Database Management for the CAD Environment: The AREDAS Approach.’ Engineering with Computers 3, Nr. 4: 207–223.
- . . ‘A New Characterization of FD Implication with an Application to Up-date Anomalies.’ Information Processing Letters 29: 131–135.
- . . ‘Update and Retrieval in a Relational Database through a Universal Schema Interface.’ ACM Transactions on Database Systems 13: 449–485.
- . . ‘An Extension of the Database Language SQL to Capture More Relational Concepts.’ ACM SIGMOD Record 17, Nr. 4: 70–78.
- . . Das SQL/DS-Handbuch. Boston, MA: Addison-Wesley.
- . . ‘Conceptual Level Concurrency Control of Relational Update Transactions (Extended Abstract).’ Contributed to the 2nd International Conference on Database Theory (ICDT), Brügge, Belgien.
- . . „Algorithmischer Schema-Entwurf als integrierter Bestandteil eines Universalrelationen-Datenbanksystems.“ Angewandte Informatik 28: 15–19.
- . . ‘Transactions in Universal Relation Databases.’ Contributed to the 2. Workshop über relationale Datenbanken, Lessach, Österreich.
- . . ‘Quadratic-Time Optimization of SPJ-Expressions Including Inequality Selections by Tableaux.’ Fundamenta Informaticae VIII VIII: 397–414.
- . . „Die Einrelationen-Benutzerschnittstelle des MEMODAX-Datenbanksystems.“ Angewandte Informatik 27: 534–540.
- . . ‘Updating a Relational Database through a Universal Schema Interface.’ Contributed to the 4th Annual ACM SIGACT-SIGMOD Symposium on Principles of Database Systems (PODS), Portland, OR.
- . . ‘A High-Level User-Interface for Update and Retrieval in Relational Databases - Language Aspects.’ Contributed to the Annual ACM SIGMOD International Conference on Management of Data, Austin, TX.
- . . „Das relationale Datenbanksystem MEMODAX - zum aktuellen Stand der Entwicklung.“ Angewandte Informatik 25: 152–163.
- . . „Über eine effiziente Implementierung des Synthese-Verfahrens zum Design relationaler Datenbank-Schemata.“ Angewandte Informatik 24: 493–503.
- . . ‘On the Average-Case Performance of Certain Approximation Algorithms for the 0/1 Knapsack Problem (Extended Abstract).’ Contributed to the 6. Symposium über Operations Research, Augsburg.
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