Publications

Theses

Ingo Frommholz. A Probabilistic Framework for Information Modelling and Retrieval Based on User Annotations on Digital Objects. Phd thesis, University of Duisburg-Essen, 2008. Available at http://www.is.inf.uni-due.de/bib/docs/Frommholz_08.html.enbib ]
Ingo Frommholz. Automatische Kategorisierung von Web-Dokumenten. Diploma thesis, University of Dortmund, January 2001. [ bib ]

Refereed Papers and Journal Articles

Phillip Mayr, Ingo Frommholz, Andrea Scharnhorst and Peter Mutschke. Bibliometric-enhanced Information Retrieval: 2nd International BIR Workshop. In Proceedings ECIR 2015.
Muhammad Kamran Abbasi and Ingo Frommholz. Cluster-based Polyrepresentation as Science Modelling Approach for Information Retrieval. Scientometrics, 2015. To appear.
Ingo Frommholz, David Graves, Haiming Liu, Ashwin Kumar and Gordon Brady. Great War Stories Told by the People - Crowdsourced Cultural Heritage in Digital Museums. In Proceedings Digital Libraries 2014 (combined ACM/IEEE Joint Conference on Digital Libraries (JCDL 2014) and International Conference on Theory and Practice of Digital Libraries (TPDL 2014)), pages 419-420, 2014.
Muhammad Kamran Abbasi and Ingo Frommholz. Bibliographics for polyrepresentative document clustering. In Proceedings of the Bibliometrics-enhanced Information Retrieval Workshop at ECIR 2014, pages 21-28, 2014.
Ingo Frommholz and Muhammad Kamran Abbasi. On Polyrepresentation and Clustering. In Proceedings of the European Conference on Information Retrieval (ECIR 2014), pages 618-623, 2014.
Obaid Almalki, Yanqing Duan, Ingo Frommholz, and Markus Haag. Identifying the Relevance of Personal Values to e-Government Portals' Success: Insights from a Delphi Study. In Proc. of the International Conference on Information and Social Science (ISS 2013), pp 97-112.
Birger Larsen, Christina Lioma, Ingo Frommholz, and Hinrich Schütze, "Preliminary Study of Technical Terminology for the Retrieval of Scientific Book Metadata Records Categories and Subject Descriptors", in SIGIR 2012: Proceedings of the 35th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval, 2012, pp. 1131-1132.
Obaid Almalki, Yanqing Duan, and Ingo Frommholz, "An exploratory study on eGovernment systems success in Saudi Arabia", in Proceedings of the 12th European Conference on eGovernment (ECEG 2012), 2012, pp. 38-46.
David Zellhöfer, Ingo Frommholz, Ingo Schmitt, Mounia Lalmas and Keith van Rijsbergen. Towards Quantum-based DB+IR Processing Based on the Principle of Polyrepresentation. In Proceedings ECIR 2011, Dublin, Ireland, April 2011.
Fabrizio Smeraldi, Miguel Martinez-Alvarez, Ingo Frommholz and Thomas Roelleke. On the Probabilistic Logical Modelling of Quantum- and Geometrically-inspired IR. In Proceedings of the 2nd Italian Information Retrieval (IIR) Workshop, Milan, Italy, January 2011.
Dawei Song, Mounia Lalmas, Keith van Rijsbergen, Ingo Frommholz, Benjamin Piwowarski, Jun Wang, P Zhang, Guido Zuccon, Peter Bruza, Sachi Arafat, Leif Azzopardi, Alvaro Huertas-Rosero, Y Hou, Massimo Melucci and Stefan Rüger. How Quantum Theory is Developing the Field of Information Retrieval. In Proceedings Quantum Interaction 2010, October 2010. [ bib ]
Benjamin Piwowarski, Ingo Frommholz, Mounia Lalmas, and Keith Van Rijsbergen. What can Quantum Theory Bring to Information Retrieval? In Proc. 19th International Conference on Information and Knowledge Management, October 2010. In this paper we describe and evaluate a quantum-inspired geometric IR framework, where a user's informaton needs are represented as unit vectors and documents as subspaces in a Hilbert space. Experiments show that this approach can compete with standard IR methods like BM25 in an adhoc scenario, with the potential to directly support different forms of user interactions as well as different retrieval tasks like novelty and diversity search. [ bib ]
Ingo Frommholz, Birger Larsen, Benjamin Piwowarski, Mounia Lalmas, Peter Ingwersen, and Keith van Rijsbergen. Supporting Polyrepresentation in a Quantum-inspired Geometrical Retrieval Framework. In Proceedings of the 2010 Information Interaction in Context Symposium, pages 115-124, New Brunswick, August 2010. ACM. We show on a conceptual basis how the principle of polyrepresentation, which considers several forms of document context, can be integrated in a quantum-inspired geometrical retrieval framework. Evidence coming from several document representations is combined by means of the tensor product, where dependencies between representations are modelled using entanglement. Shortlisted for best paper award.bib ]
Benjamin Piwowarski, Ingo Frommholz, Mounia Lalmas, and Keith van Rijsbergen. Exploring a Multidimensional Representation of Documents and Queries. In Proceedings of the 9th RIAO Conference (RIAO 2010), Paris, France, June 2010. [ bib ]
Erik Graf, Ingo Frommholz, Mounia Lalmas, and Keith van Rijsbergen. Knowledge Modeling in Prior Art Search. In Hamish Cunningham, Allan Hanbury, and Stefan Rüger, editors, Proceedings of the First Information Retrieval Facility Conference, IRFC 2010, volume 6107 of Lecture Notes in Computer Science, pages 31-46, Berlin, Heidelberg, 2010. Springer Berlin Heidelberg. [ bib | DOI | http ]
Benjamin Piwowarski, Ingo Frommholz, Yashar Moshfeghi, Mounia Lalmas, and Keith van Rijsbergen. Filtering documents with subspaces. In Proceedings of the 32nd European Conference on Information Retrieval (ECIR 2010), pages 615-618, January 2010. Best poster award!bib ]
Ingo Frommholz and Keith van Rijsbergen. Towards a Geometrical Model for Polyrepresentation of Information Objects. In Thomas Mandl and Ingo Frommholz, editors, Proc. of the GI Information Retrieval Workshop at LWA 2009, 2009. [ bib ]
Thomas Beckers, Ingo Frommholz, and Ralf Bönning. Multi-facet Classification of E-Mails in a Helpdesk Scenario. In Thomas Mandl and Ingo Frommholz, editors, Proc. of the GI Information Retrieval Workshop at LWA 2009, 2009. [ bib ]
Ingo Frommholz and Marc Lechtenfeld. Determining the Polarity of Postings for Discussion Search. In Proc. of the “Information Retrieval 2008” Workshop at LWA 2008, Würzburg, Germany, October 2008. In this paper we demonstrate the application of Support Vector Machines to determine the polarity of postings in a discussion thread, a task similar to sentiment classification. [ bib ]
Norbert Fuhr, Matthias Jordan, and Ingo Frommholz. Combining Cognitive and System-Oriented Approaches for Designing IR User Interfaces. In Proceedings of the 2nd International Workshop on Adaptive Information Retrieval (AIR 2008), October 2008. [ bib ]
Ingo Frommholz. Annotation-based Document Retrieval with Probabilistic Logics. In Norbert Fuhr, Laszlo Kovacs, and Carlo Meghini, editors, Research and Advanced Technology for Digital Libraries. Proc. of the 11th European Conference on Digital Libraries (ECDL 2007), Lecture Notes in Computer Science, pages 321-332, Heidelberg et al., September 2007. Springer. In this paper I evaluate the POLAR framework in a document search task. The results show that by applying knowledge augmentation with user comments we gain a significant performance increase. [ bib ]
Ingo Frommholz and Norbert Fuhr. Evaluation of Relevance and Knowledge Augmentation in Discussion Search. In Julio Gonzalo, Costantino Thanos, M Felisa Verdejo, and Rafael C Carrasco, editors, Research and Advanced Technology for Digital Libraries. Proc. of the 10th European Conference on Digital Libraries (ECDL 2006), Lecture Notes in Computer Science, pages 279-290, Heidelberg et al., September 2006. Springer. [ bib ]
Maristella Agosti, Nicola Ferro, Ingo Frommholz, Emanuele Panizzi, Wolfgang Putz, and Ulrich Thiel. Integration of the DiLAS Annotation Service into Digital Library Infrastructures. In Ann Blandford and Jeremy Gow, editors, Proc. Digital Libraries in the Context of Users' Broader Activities Workshop (CUBA) at JCDL 2006, June 2006. [ bib | .pdf ]
Ingo Frommholz and Norbert Fuhr. Probabilistic, Object-oriented Logics for Annotation-based Retrieval in Digital Libraries. In Michael Nelson, Cathy Marshall, and Gary Marchionini, editors, Proc. of the 6th ACM/IEEE Joint Conference on Digital Libraries (JCDL 2006), pages 55-64, New York, 2006. ACM. In this paper I specify POLAR, a logic-based probabilistic object-oriented framework aimed at retrieval based on user annotations. Integrating concepts from databases and information retrieval, POLAR supports a wide range of fact, structure and content queries, exploiting annotations as a document context. The evaluation shows performance gains in a discussions search task. [ bib ]
Maristella Agosti, Hanne Albrechtsen, Nicola Ferro, Ingo Frommholz, Preben Hansen, Nicola Orio, Emanuele Panizzi, Annelise Mark Pejtersen, and Ulrich Thiel. DiLAS: a Digital Library Annotation Service. In Proceedings of Annotation for Collaboration - A Workshop on Annotation Models, Tools and Practices, 2005. [ bib ]
Ingo Frommholz, Predrag Knežević, Bhaskar Mehta, Claudia Niedereé, Thomas Risse, and Ulrich Thiel. Supporting Information Access in Next Generation Digital Library Architectures. In Maristella Agosti, Hans-Jörg Schek, and Can Türker, editors, Digital Library Architectures: Peer-to-Peer, Grid, and Service-Orientation. Proceedings of the Sixth Thematic Workshop of the EU Network of Excellence DELOS, pages 49-60, Cagliari, Italy, June 2004. [ bib ]
Erich Neuhold, Claudia Niedereé, Avaré Stewart, Ingo Frommholz, and Bhaskar Mehta. The Role of Context for Information Mediation in Digital Libraries. In Proc. of the 7th International Conference on Asian Digital Libraries: International Collaboration and Cross-Fertilization (ICADL 2004), pages 133-143, 2004. [ bib ]
Marcello L'Abbate, Ingo Frommholz, Ulrich Thiel, and Erich Neuhold. Using Case Based Retrieval Techniques for Handling anomalous Situations in Advisory Dialogues. In Fernando Galindo, Makoto Takizawa, and Roland Traunm Ller, editors, Proceedings of the 15th International Conference on Database and Expert Systems Application (DEXA 2004), pages 539-548, 2004. [ bib ]
Maristella Agosti, Nicola Ferro, Ingo Frommholz, and Ulrich Thiel. Annotations in Digital Libraries and Collaboratories - Facets, Models and Usage. In Rachel Heery and Liz Lyon, editors, Research and Advanced Technology for Digital Libraries. Proc. European Conference on Digital Libraries (ECDL 2004), Lecture Notes in Computer Science, pages 244-255, Heidelberg et al., 2004. Springer. In this paper we present a study how collaboratories and digital libraries can benefit from annotations. The results of this study are a starting point for developing annotation-based retrieval and document management software. [ bib ]
Ulrich Thiel, Holger Brocks, Ingo Frommholz, Andrea Dirsch-Weigand, Jürgen Keiper, Adelheit Stein, and Erich Neuhold. COLLATE - A Collaboratory Supporting Research on Historic European Films. International Journal on Digital Libraries (IJDL), 4(1):8-12, 2004. [ bib ]
Ingo Frommholz, Ulrich Thiel, and Thomas Kamps. Annotation-based Document Retrieval with Four-Valued Probabilistic Datalog. In Thomas Rölleke and Arjen P de Vries, editors, Proceedings of the first SIGIR Workshop on the Integration of Information Retrieval and Databases (WIRD'04), pages 31-38, Sheffield, UK, 2004. In this paper I explain how four-valued probabilistic Datalog can be applied for annotation-based document retrieval, exploiting negative and inconsistent evidence which often occurs in discussion threads. [ bib | .pdf ]
Ingo Frommholz, Holger Brocks, Ulrich Thiel, Erich Neuhold, Luigi Iannone, Giovanni Semeraro, Magarita Berardi, and Michaele Ceci. Document-centered Collaboration for Scholars in the Humanities - The COLLATE System. In Panos Constantopoulos and Ingeborg T Solvberg, editors, Research and Advanced Technology for Digital Libraries. Proc. European Conference on Digital Libraries (ECDL 2003), Lecture Notes in Computer Science, pages 434-445, Heidelberg et al., 2003. Springer. [ bib ]
Ingo Frommholz, Holger Brocks, Ulrich Thiel, and Adelheit Stein. Kontextbasiertes Retrieval unter Verwendung verknüpfter Annotationen. In 32. GI-Jahrestagung, Informatik 2002, pages 161-165, Heidelberg et al., October 2002. Springer. [ bib ]
Holger Brocks, Adelheit Stein, Ulrich Thiel, Ingo Frommholz, and Andrea Dirsch-Weigand. How to Incorporate Collaborative Discourse in Cultural Digital Libraries. In Proceedings of the ECAI 2002 Workshop on Semantic Authoring, Annotation & Knowledge Markup (SAAKM02), Lyon, France, July 2002. [ bib ]
Ingo Frommholz. Categorizing Web Documents in Hierarchical Catalogues. In 23th European Conference on Information Retrieval Research (ECIR 2001), March 2001. [ bib ]

Books and Book Chapters

Ingo Frommholz, Muhammad Kamran Abbasi, Dunja Mladenić, Marko Grobelnik and Frederik Astrom, Automated Tools for Subject Information Organization: Selected Topics. In K. Golub (Ed.), Subject Information Access - an Interdisciplinary Approach (pp. 107-148). Libraries Unlimited. 2014.
Dawei Song, Massimo Melucci, Ingo Frommholz, Peng Zhang, Lei Wang, Sachi Arafat, editors. Quantum Interaction: 5th International Symposium, QI 2011, Aberdeen, UK, June 26-29, 2011, Revised Selected Papers. Springer, LNCS edition, July 2011.
Mounia Lalmas, Joemon Jose, Andreas Rauber, Fabrizio Sebastiani, and Ingo Frommholz, editors. Research and Advanced Technology for Digital Libraries 14th European Conference, ECDL 2010, Glasgow, UK, September 6-10, 2010. Proceedings. Springer, LNCS edition, September 2010. [ bib | http ]
Ingo Frommholz, Keith van Rijsbergen, Fabio Crestani, and Mounia Lalmas. Towards a Geometrical Cognitive Framework. In Birger Larsen, Jesper Schneider, Fredrik Aström, and Balázs Schlemmer, editors, The Janus Faced Scholar. A Festschrift in Honour of Peter Ingwersen, pages 43-48. July 2010. [ bib ]
Ulrich Thiel, Holger Brocks, Andrea Dirsch-Weigand, André Everts, Ingo Frommholz, and Adelheit Stein. Queries in Context: Access to Digitized Historic Documents in a Collaboratory for the Humanities. In Matthias Hemmje, Claudia Niedereé, and Thomas Risse, editors, From Integrated Publication and Information Systems to Virtual Information and Knowledge Environments. Essays Dedicated to Erich J. Neuhold on the Occasion of His 65th Birthday, pages 117-127. Springer, 2005. [ bib ]

Unrefereed Papers and Reports

Benjamin Piwowarski, Ingo Frommholz, Mounia Lalmas, and Keith Van Rijsbergen. Exploring a Multidimensional Representation of Documents and Queries (extended version), 2010. [ bib | http ]
Ingo Frommholz and Ray R Larson. Report on the INEX 2006 Heterogeneous Collection Track. In SIGIR Forum, volume 41, June 2007. [ bib ]
Ingo Frommholz and Ray R Larson. The Heterogeneous Collection Track at INEX 2006. In Norbert Fuhr, Mounia Lalmas, and Andrew Trotman, editors, Proceedings INEX 2006, LNCS, pages 312-317, Heidelberg et al., 2007. Springer.[ bib ]
Ingo Frommholz and Norbert Fuhr. KI-Methoden zur Email-Archivierung - Technologische Studie zum "Inbox-Szenario", November 2006. Study examining the application of machine learning and AI methods for archiving emails, on behalf of d.velop AG, Germany. In German. [ bib | .html ]
Ingo Frommholz. What did the Others Say? Probabilistic Indexing and Retrieval Models in Annotation-based Discussions. TCDL Bulletin, 2(2), 2006. [ bib | .html ]
Ingo Frommholz. Applying the Annotation View on Messages for Discussion Search. In E M Voorhees and Lori P Buckland, editors, The Fourteenth Text REtrieval Conference (TREC 2005), Gaithersburg, MD, USA, 2005. NIST. [ bib ]
Ingo Frommholz and Matthias Hemmje. Ausarbeitung von Lösungsansätzen für die Erstellung eines Thesaurus-basierten Geologischen Informationssystems des Bayerischen Geologischen Landesamts München Technologische Studie, December 2001. Study examining means for migrating a geological database into a European information system/thesaurus, on behalf of the Bavarian Environment Agency in Munich, Germany. In German.