Prof. Dr. Philipp Schaer

Profile

Philipp Schaer is Professor for Information Retrieval with the Institute of Information Science at TH Köln (University of Applied Sciences) where he teaches courses on Information Retrieval, Database Systems, and Search Engine Technology. He was team leader and postdoctoral researcher at the GESIS department Computational Social Science (CSS) where he led a team of computer, social and information scientist. His professional work was on topics like semi-/automatic indexing, semantic annotation, and using knowledge organization systems to enhance information retrieval.

He studied computer science with special interest in information retrieval and human factors in information systems and graduated at University of Koblenz-Landau where he received his degree as Diplom-Informatiker and later his doctorate in computer science. He has been working in DFG-funded research projects on human-computer interaction, open access repositories and value-added services for information retrieval and published in the areas of information retrieval, informetrics, and digital libraries. He serves as reviewer for journals, edited books, international conferences and workshops.

His research interests are: information retrieval, query expansion, applied informetric methods in digital libraries, evaluation of information retrieval systems, and especially living lab evaluation environments.

List of Publications

2018

Towards an IR Test Collection for the German National Library.
In: S. P. Ponzetto and R. Gemulla, editors, Proceedings of LWDA 2018. 2018.
Johanna Munkelt, Philipp Schaer and Klaus Lepsky.
[BibTeX] 
Prioritizing and Scheduling Conferences for Metadata Harvesting in dblp.
In: JCDL '18 Proceedings of the 18th ACM/IEEE on Joint Conference on Digital Libraries , pages 45-48. ACM, New York, NY, USA, 2018.
Mandy Neumann, Christopher Michels, Philipp Schaer and Schenkel Ralf.
[doi] [pdf]  [abstract]  [BibTeX] 

2017

Overview of TREC OpenSearch 2017..
In: E. M. Voorhees and A. Ellis, editors, TREC, volume Special Publication 500-324. National Institute of Standards and Technology (NIST), 2017.
Rolf Jagerman, Krisztian Balog, Philipp Schaer, Johann Schaible, Narges Tavakolpoursaleh and Maarten de Rijke.
[doi]  [BibTeX] 
Web-Scraping for Non-Programmers: Introducing OXPath for Digital Library Metadata Harvesting.
Code4Lib Journal, 38, 2017.
Mandy Neumann, Jan Steinberg and Philipp Schaer.
[doi]  [abstract]  [BibTeX] 
Enriching Existing Test Collections with OXPath.
In: G. J. F. Jones, S. Lawless, J. Gonzalo, L. Kelly, L. Goeuriot, T. Mandl, L. Cappellato and F. Nicola, editors, Experimental IR Meets Multilinguality, Multimodality, and Interaction 8th International Conference of the CLEF Association, CLEF 2017, Dublin, Ireland, September 11-14, 2017, Proceedings, volume 10456, series Lecture Notes in Computer Science. 2017.
Philipp Schaer and Mandy Neumann.
[doi] [pdf]  [abstract]  [BibTeX] 
Living Labs - An Ethical Challenge for Researchers and Platform Providers.
In: M. Zimmer and K. Kinder-Kurlanda, editors, Internet Research Ethics for the Social Age: New Challenges, Cases, and Contexts. Peter Lang, 2017.
Philipp Schaer.
[pdf]  [BibTeX] 
IR-Cologne at TREC 2017 OpenSearch Track: Rerunning Popularity Ranking Experiments in a Living Lab.
In: The Twenty-Sixth Text REtrieval Conference Proceedings (TREC 2017) , series NIST Special Publication. National Institute of Standards and Technology (NIST), 2017.
Narges Tavakolpoursaleh, Mandy Neumann and Philipp Schaer.
[pdf]  [BibTeX] 

2016

Overview of the TREC 2016 Open Search track.
In: E. M. Voorhees and A. Ellis, editors, TREC, volume Special Publication 500-321. National Institute of Standards and Technology (NIST), 2016.
Krisztian Balog, Anne Schuth, Peter Dekker, Philipp Schaer, Po-Yu Chuang and Narges Tavakolpoursaleh.
[pdf]  [BibTeX] 
How Relevant is the Long Tail? - A Relevance Assessment Study on Million Short..
In: N. Fuhr, P. Quaresma, T. Gonçalves, B. Larsen, K. Balog, C. Macdonald, L. Cappellato and N. Ferro, editors, Experimental IR Meets Multilinguality, Multimodality, and Interaction - 7th International Conference of the CLEF Association, CLEF 2016, Évora, Portugal, September 5-8, 2016, Proceedings, volume 9822, series Lecture Notes in Computer Science, pages 227-233. Springer, 2016.
Philipp Schaer, Philipp Mayr, Sebastian Sünkler and Dirk Lewandowski.
[pdf]  [BibTeX] 
Ideas for a Standard LL4IR Extension - Living Labs from a System Operator's Perspective..
In: K. Balog, L. Cappellato, N. Ferro and C. Macdonald, editors, Working Notes of CLEF 2016 - Conference and Labs of the Evaluation forum, Évora, Portugal, 5-8 September, 2016, volume 1609, series CEUR Workshop Proceedings, pages 591-592. CEUR-WS.org, 2016.
Philipp Schaer and Narges Tavakolpoursaleh.
[pdf]  [BibTeX] 
Popularity Ranking for Scientific Literature Using the Characteristic Scores and Scale Method.
In: E. M. Voorhees and A. Ellis, editors, TREC, volume Special Publication 500-321. National Institute of Standards and Technology (NIST), 2016.
Philipp Schaer and Narges Tavakolpoursaleh.
[doi] [pdf]  [BibTeX] 

2015

Query Expansion for Survey Question Retrieval in the Social Sciences.
In: Proceedings of 19th International Conference on Theory and Practice of Digital Libraries 2015 (TPDL 2015). Springer, 2015.
Nadine Dulisch, Andreas Oskar Kempf and Philipp Schaer.
[pdf]  [BibTeX] 
A System for Probabilistic Linking of Thesauri and Classification Systems.
KI - Künstliche Intelligenz:1-4, 2015.
Lisa Posch, Philipp Schaer, Arnim Bleier and Markus Strohmaier.
[doi] [pdf]  [BibTeX] 
The Polylingual Labeled Topic Model .
In: S. Hölldobler, M. Krötzsch, R. Peñaloza and S. Rudolph, editors, KI 2015: Advances in Artificial Intelligence, volume 9324, series Lecture Notes in Computer Science, pages 295-301. Springer, 2015.
Lisa Posch, Arnim Bleier, Philipp Schaer and Markus Strohmaier.
[pdf]  [BibTeX] 
Historical Clicks for Product Search: GESIS at CLEF LL4IR 2015.
In: CLEF 2015 Workshop Proceedings. 2015.
Philipp Schaer and Narges Tavakolpoursaleh.
[pdf]  [BibTeX] 

2014

On the Connection Between Citation-based and Topical Relevance Ranking: Results of a Pretest using iSearch.
In: Proceedings of the First Workshop on Bibliometric-enhanced Information Retrieval, volume 1145, series CEUR Workshop Proceedings, pages 37-44. Amsterdam, The Netherlands, 2014. urn:nbn:de:0074-1143-7
Zeljko Carevic and Philipp Schaer.
[doi] [pdf]  [BibTeX] 
Bibliometric-Enhanced Information Retrieval.
In: Proceedings of the 36th International European Conference on Information Retrieval, ECIR'14, April 13 - April 16, 2014, Amsterdam, The Netherlands, volume 8416, series Lecture Note in Computer Science, pages 798–801. Springer, 2014.
Philipp Mayr, Andrea Scharnhorst, Birger Larsen, Philipp Schaer and Peter Mutschke.
[pdf]  [abstract]  [BibTeX] 
Editorial for the Bibliometric-enhanced Information Retrieval Workshop at ECIR 2014.
In: Proceedings of the First Workshop on Bibliometric-enhanced Information Retrieval, volume 1145, series CEUR Workshop Proceedings, pages 37-44. Amsterdam, The Netherlands, 2014. urn:nbn:de:0074-1143-7
Philipp Mayr, Philipp Schaer, Andrea Scharnhorst and Peter Mutschke.
[doi] [pdf]  [BibTeX] 

2013

Performing Informetric Analysis on Information Retrieval Test Collections: Preliminary Experiments in the Physics Domain.
In: 14th International Society of Scientometrics and Informetrics Conference ISSI, volume 2, pages 1392-1400. 2013.
Tamara Heck and Philipp Schaer.
[pdf]  [abstract]  [BibTeX] 
A Framework for Specific Term Recommendation Systems.
In: Proceedings of the 36th international ACM SIGIR conference on Research and development in information retrieval, pages 1093–1094. ACM, New York, NY, USA, 2013.
Thomas Lüke, Philipp Schaer and Philipp Mayr.
[pdf]  [BibTeX] 
An OAI-PMH-based Web-Service for the Generation of Co-Author-Networks.
In: Proceedings of the International Symposium of Information Science (ISI 2013). 2013.
Philipp Schaer, Thomas Lüke, Philipp Mayr and Peter Mutschke.
[pdf]  [BibTeX] 
Applied Informetrics for Digital Libraries: An Overview of Foundations, Problems and Current Approaches.
Historical Social Research, 38(3):267-281, 2013.
Philipp Schaer.
[pdf]  [BibTeX] 
Der Nutzen informetrischer Analysen und nicht-textueller Dokumentattribute für das Information Retrieval in digitalen Bibliotheken.
PhD thesis, University Koblenz-Landau, Koblenz, 2013.
Philipp Schaer.
[doi] [pdf]  [BibTeX] 
Information Retrieval und Informetrie: Zur Anwendung informetrischer Methoden in digitalen Bibliotheken.
Historical Social Research, 38(3):282-354, 2013.
Philipp Schaer.
[pdf]  [BibTeX] 

2012

Integrating Interactive Visualizations in the Search Process of Digital Libraries and IR Systems..
In: R. A. Baeza-Yates, A. P. de Vries, H. Zaragoza, B. B. Cambazoglu, V. Murdock, R. Lempel and F. Silvestri, editors, ECIR, volume 7224, series Lecture Notes in Computer Science, pages 447-450. Springer, 2012.
Daniel Hienert, Frank Sawitzki, Philipp Schaer and Philipp Mayr.
[doi] [pdf]  [BibTeX] 
Improving Retrieval Results with Discipline-Specific Query Expansion..
In: P. Zaphiris, G. Buchanan, E. Rasmussen and F. Loizides, editors, TPDL, volume 7489, series Lecture Notes in Computer Science, pages 408-413. Springer, 2012.
Thomas Lüke, Philipp Schaer and Philipp Mayr.
[doi]  [BibTeX] 
Extending Aggregated Search in a Social Sciences Digital Library.
In: B. Larsen, C. Lioma and A. De Vries, editors, Proceedings of the Task Based and Aggregated Search Workshop (TBAS 2012). 2012.
Frank Sawitzki, Philipp Schaer and Daniel Hienert.
[pdf]  [BibTeX] 
Better Than Their Reputation? On the Reliability of Relevance Assessments with Students.
In: T. Catarci, P. Forner, D. Hiemstra, A. Peñas and G. Santucci, editors, Information Access Evaluation meets Multilinguality, Multimodality, and Visual Analytics Third International Conference of the CLEF Initiative - CLEF 2012, series LNCS, pages 126–137. Springer-Verlag, Berlin, Heidelberg, 2012.
Philipp Schaer.
[pdf]  [abstract]  [BibTeX] 
Building Custom Term Suggestion Web Services with OAI-Harvested Open Data.
In: M. Ockenfeld, I. Peters and K. Weller, editors, Proceedings of the 64. DGI Annual Meeting and 2nd DGI-Conference, series Tagungen der Deutschen Gesellschaft für Informationswissenschaft und Informationspraxis, pages 389-396. Deutsche Gesellschaft für Informationswissenschaft und Informationspraxis, 2012.
Philipp Schaer, Thomas Lüke and Wilko van Hoek.
[pdf]  [BibTeX] 
Dealing with Sparse Document and Topic Representations: Lab Report for CHiC 2012.
In: CLEF 2012 Labs and Workshop, Notebook Papers: CLEF/CHiC Workshop-Notes. 2012.
Philipp Schaer, Daniel Hienert, Frank Sawitzki, Andias Wira-Alam and Thomas Lüke.
[pdf]  [BibTeX] 
Extending Term Suggestion with Author Names..
In: P. Zaphiris, G. Buchanan, E. Rasmussen and F. Loizides, editors, TPDL, volume 7489, series Lecture Notes in Computer Science, pages 317-322. Springer, 2012.
Philipp Schaer, Philipp Mayr and Thomas Lüke.
[doi]  [BibTeX] 

2011

A Novel Combined Term Suggestion Service for Domain-Specific Digital Libraries..
In: S. Gradmann, F. Borri, C. Meghini and H. Schuldt, editors, TPDL, volume 6966, series Lecture Notes in Computer Science, pages 192-203. Springer, 2011.
Daniel Hienert, Philipp Schaer, Johann Schaible and Philipp Mayr.
[doi] [pdf]  [BibTeX] 
VIZGR: Combining Data on a Visual Level.
In: Proceedings of the 7th International Conference on Web Information Systems and Technologies (WEBIST). 2011.
Daniel Hienert, Benjamin Zapilko, Philipp Schaer and Brigitte Mathiak.
[doi] [pdf]  [abstract]  [BibTeX] 
Vizgr: Linking Data in Visualizations.
In: J. Cordeiro and J. Filipe, editors, WEBIST 2011 Selected and Revised Papers. Springer, 2011.
Daniel Hienert, Benjamin Zapilko, Philipp Schaer and Brigitte Mathiak.
[BibTeX] 
Web-Based Multi-View Visualizations for Aggregated Statistics.
In: A. Bozzon, S. Comai and M. Norrie, editors, Proceeding of the 2nd International Workshop on DATA Visualization and Integration on data-centric Web Services. IEEE, 2011.
Daniel Hienert, Benjamin Zapilko, Philipp Schaer and Brigitte Mathiak.
[doi] [pdf]  [BibTeX] 
A Science Model Driven Retrieval Prototype.
In: F. Boteram, W. Gödert and J. Hubrich, editors, Proceedings of the Cologne Conference on Interoperability and Semantics in Knowledge Organization, volume 1, series Reihe Informations- und Bibliothekswissenschaften, pages 111-122. Ergon Verlag, Würzburg, 2011.
Philipp Mayr, Philipp Schaer and Peter Mutschke.
[doi] [pdf]  [abstract]  [BibTeX] 
Applying Science Models for Search.
In: J. Griesbaum, T. Mandl and C. Womser-Hacker, editors, Information und Wissen: global, sozial und frei? - Proceedings des 12. Internationalen Symposiums für Informationswissenschaft (ISI 2011), volume 58, series Schriften zur Informationswissenschaft, pages 184-196. Verlag Werner Hülsbusch, Boizenburg, 2011.
Philipp Mayr, Peter Mutschke, Vivien Petras, Philipp Schaer and York Sure.
[doi] [pdf]  [BibTeX] 
Mehrwertdienste für das Information Retrieval: das Projekt IRM.
In: Wissen - Wissenschaft - Organisation, volume 12, series Fortschritte in der Wissensorganisation. Ergon-Verlag, Würzburg, 2011. (erscheint)
Philipp Mayr, Peter Mutschke, Philipp Schaer and York Sure.
[doi] [pdf]  [BibTeX] 
Science models as value-added services for scholarly information systems..
Scientometrics, 89(1):349-364, 2011.
Peter Mutschke, Philipp Mayr, Philipp Schaer and York Sure.
[doi] [pdf]  [BibTeX] 
Using Lotkaian Informetrics for Ranking in Digital Libraries.
In: C. Hoare and A. O'Riordan, editors, Proceedings of the ASIS&T European Workshop 2011 (AEW 2011). ASIS&T, Cork, Ireland, 2011.
Philipp Schaer.
[pdf]  [BibTeX] 

2010

Demonstrating a Service-Enhanced Retrieval System.
In: A. Grove, editor, ASIST 2010 - Proceedings of the 73rd ASIS&T Annual Meeting, volume 47. Pittsburgh, PA, USA, 2010.
Philipp Schaer, Philipp Mayr and Peter Mutschke.
[doi] [pdf]  [BibTeX] 
Implications of Inter-Rater Agreement on a Student Information Retrieval Evaluation.
In: M. Atzmüller, D. Benz, A. Hotho and G. Stumme, editors, Proceedings of LWA2010 - Workshop-Woche: Lernen, Wissen + Adaptivität. Kassel, Germany, 2010.
Philipp Schaer, Philipp Mayr and Peter Mutschke.
[doi] [pdf]  [abstract]  [BibTeX] 
Integration von Open Access Repositorien in Fachportale.
In: Wissensspeicherung in digitalen Räumen. Nachhaltigkeit, Verfügbarkeit, semantische Interoperabilität, series Fortschritte in der Wissensorganisation, pages 245-251. Ergon-Verlag, Würzburg, 2010.
Philipp Schaer.
[pdf]  [abstract]  [BibTeX] 
Aktivitäten von GESIS im Kontext von Open Data und Zugang zu sozialwissenschaftlichen Forschungsergebnissen.
In: 1. DGI-Konferenz, 62. DGI Jahrestagung - Semantic Web & Linked Data Elemente zukünftiger Informationsinfrastrukturen. 2010.
Anja Wilde, Agnieszka Wenninger, Oliver Hopt, Philipp Schaer and Benjamin Zapilko.
[pdf]  [abstract]  [BibTeX] 

2009

202 encyclopedia entries on information and computer science.
In: K. Umlauf and S. Gradmann, editors, Lexikon der Bibliotheks- und Informationswissenschaft. LBI. Hiersemann, Stuttgart, 2009.
Philipp Schaer.
[BibTeX] 

2008

Enhancing Visibility: Integrating Grey Literature in the SOWIPORT Information Cycle.
In: Ninth International Conference on Grey Literature: Grey Foundations in Information Landscape, series GL-conference series. 2008.
Maximilian Stempfhuber, Philipp Schaer and Wei Shen.
[pdf]  [BibTeX] 

2007

State-of-the-Art: Interaktion in Erweiterten Realitäten.
Research Report, Institut für Computervisualistik, Universität Koblenz-Landau, 2007.
Philipp Schaer and Marco Thum.
[pdf]  [BibTeX] 
Visualisierung und Interaktion in Erweiterten Realitäten.
2007.
Philipp Schaer and Marco Thum.
[pdf]  [BibTeX] 
Methodes and Services for Semantic Integration in Information Systems.
In: German E-Science Conference. Baden-Baden, 2007.
Maximilian Stempfhuber and Philipp Schaer.
[doi] [pdf]  [BibTeX] 

2006

Abstrakte Interaktionskonzepte in Erweiterten Realitäten.
Master's thesis (Diplomarbeit), Universität Koblenz-Landau, Campus Koblenz, Fachbereich 4 Informatik, Institut für Computervisualistik, 2006.
Philipp Schaer.
[pdf]  [BibTeX] 
Grundlagen der Kognition und Perzeption für die Software-Ergonomie.
Research Report, Universität Koblenz-Landau, Institut für Computervisualistik, 2006.
Philipp Schaer and Holger Heuser.
[pdf]  [abstract]  [BibTeX] 

2004

Evaluation von Glanzlichtdetektionsverfahren in der Endoskopie.
Master's thesis (Studienarbeit), Universität Koblenz-Landau, Campus Koblenz, Fachbereich 4 Informatik, Institut für Computervisualistik, 2004.
Philipp Schaer.
[pdf]  [BibTeX] 

Prof. Dr.Philipp Schaer

Role
Head of Group
Mail
philipp.schaer@th-koeln.de
Phone
+49 221-8275-3845
Room
B5.420