Research

Research Interests

Everything which has to do with data and the Web: information retrieval, database systems, information integration, data mining, machine learning, cloud computing, Web 2.0, Semantic Web, crawlers, information extraction, etc...

PhD

In March 2010 I received my doctorate degree in computer science from Johannes Kepler University Linz (PhD thesis: A Flexible Architecture for Virtual Information Integration Based on Semantic Web Concepts). My position as senior scientist at the Institute for Applied Knowledge Processing, Johannes Kepler University Linz ended also with March 2010.

Conferences

I'm PC member of the following conferences/workshops:

Coorganized Events

Teaching

I've held lectures on database systems, Web Engineering, and Hypermedia Programming at the Upper Austrian University of Applied Sciences from 2005 to 2008.

I'm occasionally holding lectures on Semantic Web topics at the Johannes Kepler University Linz.

Talks

  • Linked Open Government Data, Keynote at the data.gv.at Meetup. OCG Vienna, April 2010.
  • Invited talk about my PhD work as part of a cooperation meeting between TU Vienna and NII Tokyo, sba-research Vienna, April 2010.
  • Semantics in the Smart Grid, Expert talk for the consortium of the Sesame EU project on smart metering. Marriott Linz, March 2010.
  • Semantische Datenintegration in eScience Grids - Chancen im E-Business (in German). Invited talk for the ebSemantics working group of the Austrian economic chamber. WKW Vienna, June 2007.
  • Are Ontologies the Nostrum to bridge the Semantic Gap? Invited Talk at the 8th International Conference on Information Integration and Web-based Application & Services (IIWAS'06), Yogyakarta, 2006.
  • Numerous conference presentations (see publications below)
  • Colloquiums at various partner universities

Publications, Tutorials, Posters, and Demos

  • Andreas Langegger: Ontology-based Information Integration - A Flexible Approach for Ontology-based Virtual Information Integration Building on Semantic Web Technology (Dissertation). Südwestdeutscher Verlag für Hochschulschriften, März 2010. ISBN 3838115694.
  • Andreas Langegger: A Flexible Architecture for Virtual Information Integration Based on Semantic Web Concepts, PhD thesis. Johannes Kepler University Linz, Austria. January 2010.
  • Bernhard Haslhofer, Bernhard Schandl, Andreas Langegger, Wolfgang Halb, and Tobias Bürger: Web of Data in the Context of Multimedia (WoDMM), 4th International Conference on Semantic and Digital Media Technologies (SAMT 2009). Graz, Austria, 2009.
  • Andreas Langegger and Wolfram Wöß: XLWrap – Querying and Integrating Arbitrary Spreadsheets with SPARQL. In Proceedings of the 8th International Semantic Web Conference (ISWC2009), Washington D.C. LNCS 5823, Springer, 2009.
  • Andreas Langegger and Wolfram Wöß: Querying and Semantically Integrating Spreadsheet Collections with XLWrap-Server – Use Cases and Mapping Design Patterns. Poster & Demo Session at the 8th International Semantic Web Conference (ISWC2009), Washington D.C., 2009. Download poster
  • Wolfgang Schreiner, Károly Bósa, Andreas Langegger, Thomas Leitner, Bernhard Moser, Szilárd Páll, Volkmar Wieser, Wolfram Wöß: Parallel, Distributed, and Grid Computing. In Buchberger et al. (Eds.): Hagenberg Research. Springer, 2009.
  • A. Langegger, T. Leitner, W. Wöß: Providing Semantic Data Integration as a Grid Service - In Proceedings of the 3rd Austrian Grid Symposium 2009, Linz. OCG, 2009.
  • A. Langegger, W. Wöß: RDFStats - An Extensible RDF Statistics Generator and Library. In Workshop Proceedings of the DEXA Conference 2009, IEEE, 2009.
  • A. Langegger: Virtual Data Integration on the Web – Novel Methods for Accessing Heterogeneous and Distributed Data with Rich Semantics. In Proceedings of the 10th International Conference on Information Integration and Web-based Applications & Services (iiWAS2008), OCG Verlag, 2008.
  • A. Langegger, W. Wöß, M. Blöchl: SemWIQ – Semantic Web Integrator and Query Engine. In Lecture Notes in Informatics, International Applications of Semantic Web Workshop (AST'08), Gesellschaft für Informatik, Bonn, 2008.
  • A. Langegger, W. Wöß, M. Blöchl: A Semantic Web Middleware for Virtual Data Integration on the Web. In Proceedings of the European Semantic Web Conference (ESWC'08), p. 493-507. Springer. 2008.
  • A. Langegger, W. Wöß, M. Blöchl: A Semantic Web Middleware for Virtual Data Integration on the Web (Poster). European Semantic Web Conference (ESWC'08), CEUR-WS Proceedings. 2008.
  • A. Langegger, M. Blöchl, W. Wöß: Sharing Data on the Grid using Ontologies and distributed SPARQL Queries. In Proceedings of the DEXA Conference, 6th Workshop on Web Semantics. IEEE Computer Society Press. 2007.
  • A. Langegger: Ontology-based Virtual Data Integration for E-Science Grids (Poster). 4th European Semantic Web Conference, PhD Symposium. CEUR Workshop Proceedings. 2007. Abstract.
  • A. Langegger, W. Wöß: Product Finding on the Semantic Web - A Search Agent supporting Products with limited Availability. In Int. Journal of Web Information Systems 3:1/2. Emerald, 2007.
  • A. Langegger, R. Wagner: Product Finding on the Next Generation Web. In Proceedings of the 8th International Conference on Information Integration and Web-based Application & Services (IIWAS'06), Yogyakarta. OCG, 2006.
  • M. Blöchl, A. Langegger, W. Wöß: Registration of Heterogeneous Data Sources in the Case of the Grid Semantic Data Access Middleware (G-SDAM). In Proceedings of the Austrian Grid Symposium (AGS'06), OCG, 2006.
  • A. Langegger, J. Palkoska, R. Wagner: DaVinci - A Model-driven Web Engineering Framework. In International Journal of Web Information Systems, Vol. 2, Issue 2, p. 119-132, 2006. Troubador Publishing.
  • M. Blöchl, G. Gruber, A. Langegger und W. Wöß: G-SDAM - Seamless Semantic Data Interchange for Grid Computing. In Proceedings of the Austrian Grid Symposium (AGS'05), 2005. OCG Verlag
  • A. Wöhrer, M. Blöchl, P. Brezany, G. Gruber, A. Langegger, H. Schentz, W. Wöß: Towards Semantic Data Integration for Advanced Data Analysis of Grid Data Repositories. In Proceedings of the Austrian Grid Symposium (AGS'05), OCG, 2005
  • A. Langegger, J. Palkoska, R. Wagner: Simplifying a Web Application's Architecture - The DaVinci Framework. In Proceedings of The Seventh International Conference on Information Integration and Web-based Applications and Services (iiWAS'05, Malaysia), Vol. 2, pp. 643-654, Sept. 2005.
  • A. Langegger: Architektur und Design eines PHP4-basierten Frameworks für Webapplikationen. Master Thesis, Upper Austria University of Technology, Prof. Rimbert Rudisch. August 2003.

Open Source Projects

  • XLWrap - A powerful Spreadsheet-to-RDF Wrapper
  • D2R-Server - several contributions to the popular Database-to-RDF Wrapper
  • RDFStats - An extensible RDF statistics generator fr
  • SemWIQ - Semantic Web Integrator and Query Engine

Some Past Projects

  • Intelligent Job ad crawler (2007-2008): consulting and development for Pro.Karriere GmbH, which runs four job platforms based on this crawler, entity extraction, and classification system
  • Autonomous Bidding Agent Service (2005) for a multi-variate auction system in the e-tourism domain, J2EE implementation
  • DaVinci Web Engineering Framework (2003): Homepage at SourceForge.net (Java-port of phpDaVinci, not maintained anymore)
  • phpDaVinci (2003): Development of an UML-based application framework for PHP/Java, called DaVinci (see http://phpdavinci.sf.net, download this paper or my diploma thesis). The MVC-concept of Smalltalk-80 was adopted and for the view-tier I used the concept of a "Scenegraph", which is popular in Computer Graphic APIs. The difficulty was to use PHP4 in a strong Object-oriented manner. The stateless persistance of the application state with a script language was the biggest problem, that's why projects like the SRM have been introduced.
  • Orgasmic Ride (2002), a Virtual Reality Fitness Training Simulation Game - players could step or ride connected over Ethernet against one another on a railway system with switches, collision detection, real-life physics, and so on.... (map was based on BSP Treens, we used ID-Soft's GTK Radiant for editing the sceneries).
  • MP3-Jukebox (2000): during my studies we developed a networked MP3-Jukebox running on a PhotoPlay kiosk from Funworld - the database and files on the clients could be synchronized by a central server in the headquaters)
  • GIS mapping system (2004) for the Wienerberger AG - the company wanted to automatically geo-code all its settlements in Europe, we did it for Belgium, Poland, and Germany