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

2024

Validating Synthetic Usage Data in Living Lab Environments.
Journal of Data and Information Quality, 16(1):1-33, 2024.
Timo Breuer, Norbert Fuhr and Philipp Schaer.
[doi] [pdf]  [BibTeX] 
Context-Driven Interactive Query Simulations Based on Generative Large Language Models.
In: ECIR 2024. 2024.
Björn Engelmann, Timo Breuer, Jana Isabelle Friese, Philipp Schaer and Norbert Fuhr.
[pdf]  [BibTeX] 
ChatGPT, schreibe mir einen Aufsatz über Ursula Georgy.
In: S. Fühles-Ubach, A. Oßwald, F. Schade and R. Seidler-de Alwis, editors, Engagement in der Informationswissenschaft - Festschrift für Ursula Georgy, pages 36-51. b.i.t.verlag, Wiesbaden, 2024.
Claudia Frick and Philipp Schaer.
[pdf]  [BibTeX] 
Teaching Information Retrieval with a Shared Task Across Universities: First Steps and Findings.
In: Proceedings of LWDA’24: Lernen, Wissen, Daten, Analysen. September 23–25, 2024, Würzburg, Germany, series CEUR Workshop Proceedings (CEUR-WS.org). 2024.
Maik Fröbe, Christopher Akiki, Timo Breuer, Thomas Eckart, Annemarie Friedrich, Lukas Gienapp, Jan Heinrich Merker, Martin Potthast, Harrisen Scells, Philipp Schaer and Benno Stein.
[pdf]  [BibTeX] 
Investigating Bias in Political Search Query Suggestions by Relative Comparison with LLMs.
In: WEBSCI '24: Proceedings of the 16th ACM Web Science Conference. ACM, 2024.
Fabian Haak, Björn Engelmann, Christin Katharina Kreutz and Philipp Schaer.
[BibTeX] 
Evaluation of Temporal Change in IR Test Collections.
In: Proceedings of the 2024 ACM SIGIR International Conference on Theory of Information Retrieval, series ICTIR '24, pages 3–13. Association for Computing Machinery, New York, NY, USA, 2024.
Jüri Keller, Timo Breuer and Philipp Schaer.
[doi] [pdf]  [abstract]  [BibTeX] 
Leveraging Prior Relevance Signals in Web Search.
In: G. Faggioli, N. Ferro, P. Galuscáková and A. G. S. de Herrera, editors, Working Notes of the Conference and Labs of the Evaluation Forum (CLEF 2024), Grenoble, France, 9-12 September, 2024, volume 3740, series CEUR Workshop Proceedings, pages 2396-2406. CEUR-WS.org, 2024.
Jüri Keller, Timo Breuer and Philipp Schaer.
[doi]  [BibTeX] 
Replicability Measures for Longitudinal Information Retrieval Evaluation.
In: Experimental IR Meets Multilinguality, Multimodality, and Interaction - 15th International Conference of the CLEF Association, CLEF 2024, Grenoble, France, September 9–12, 2024, Proceedings, Part I. Springer Cham, 2024.
Jüri Keller, Timo Breuer and Philipp Schaer.
[pdf]  [BibTeX] 
BATS: BenchmArking Text Simplicity.
In: L.-W. Ku, A. Martins and V. Srikumar, editors, Findings of the Association for Computational Linguistics ACL 2024, pages 11968-11989. Association for Computational Linguistics, Bangkok, Thailand and virtual meeting, 2024.
Christin Kreutz, Fabian Haak, Björn Engelmann and Philipp Schaer.
[doi]  [abstract]  [BibTeX] 
Evaluating Stability of Information Needs.
In: Proceedings of BIR@ECIR 2024. CEUR, 2024.
Christin Katharina Kreutz, Philipp Schaer and Ralf Schenkel.
[doi] [pdf]  [BibTeX] 
Editorial to the special issue on JCDL 2022.
International Journal on Digital Libraries, 2024.
Philipp Mayr, Annika Hinze and Philipp Schaer.
[doi]  [abstract]  [BibTeX] 
Dynamics in Search Engine Query Suggestions for European Politicians.
In: WEBSCI '24: Proceedings of the 16th ACM Web Science Conference, pages 279–289. 2024.
Franziska Pradel, Fabian Haak, Sven-Oliver Proksch and Philipp Schaer.
[doi]  [BibTeX] 
SIGIR 2024 Workshop on Simulations for Information Access (Sim4IA 2024).
In: Proceedings of the 47th International ACM SIGIR Conference on Research and Development in Information Retrieval, series SIGIR '24, pages 3058–3061. Association for Computing Machinery, New York, NY, USA, 2024.
Philipp Schaer, Christin Katharina Kreutz, Krisztian Balog, Timo Breuer and Norbert Fuhr.
[doi] [pdf]  [abstract]  [BibTeX] 

2023

Bibliometric Data Fusion for Biomedical Information Retrieval.
In: ACM/IEEE Joint Conference on Digital Libraries, JCDL 2023, Santa Fe, NM, USA, June 26-30, 2023, pages 107-118. IEEE, 2023.
Timo Breuer, Christin Katharina Kreutz, Philipp Schaer and Dirk Tunger.
[doi] [pdf]  [BibTeX] 
Reliable Rules for Relation Extraction in a Multimodal Setting.
In: B. König-Ries, S. Scherzinger, W. Lehner and G. Vossen, editors, Datenbanksysteme für Business, Technologie und Web (BTW 2023), 20. Fachtagung des GI-Fachbereichs ,,Datenbanken und Informationssysteme" (DBIS), 06.-10, März 2023, Dresden, Germany, Proceedings, volume P-331, series LNI, pages 1009-1021. Gesellschaft für Informatik e.V., 2023.
Björn Engelmann and Philipp Schaer.
[doi] [pdf]  [BibTeX] 
Simulating Users in Interactive Web Table Retrieval.
In: I. Frommholz, F. Hopfgartner, M. Lee, M. Oakes, M. Lalmas, M. Zhang and R. L. T. Santos, editors, Proceedings of the 32nd ACM International Conference on Information and Knowledge Management, CIKM 2023, Birmingham, United Kingdom, October 21-25, 2023, pages 3875-3879. ACM, 2023.
Björn Engelmann, Timo Breuer and Philipp Schaer.
[doi] [pdf]  [BibTeX] 
Text Simplification of Scientific Texts for Non-Expert Readers.
In: SimpleText@CLEF-2023, volume abs/2307.03569, series CEUR Workshop Proceedings. 2023.
Björn Engelmann, Fabian Haak, Christin Katharina Kreutz, Narjes Nikzad-Khasmakhi and Philipp Schaer.
[doi] [pdf]  [BibTeX] 
Qbias - A Dataset on Media Bias in Search Queries and Query Suggestions.
In: Proceedings of the 15th ACM Web Science Conference 2023, series WebSci '23, pages 239–244. Association for Computing Machinery, New York, NY, USA, 2023.
Fabian Haak and Philipp Schaer.
[doi] [pdf]  [abstract]  [BibTeX] 
Automated Statement Extraction from Press Briefings.
In: B. König-Ries, S. Scherzinger, W. Lehner and G. Vossen, editors, Datenbanksysteme für Business, Technologie und Web (BTW 2023), 20. Fachtagung des GI-Fachbereichs ,,Datenbanken und Informationssysteme" (DBIS), 06.-10, März 2023, Dresden, Germany, Proceedings, volume P-331, series LNI, pages 1049-1057. Gesellschaft für Informatik e.V., 2023.
Jüri Keller, Meik Bittkowski and Philipp Schaer.
[doi] [pdf]  [BibTeX] 
Evaluating Temporal Persistence Using Replicability Measures.
In: M. Aliannejadi, G. Faggioli, N. Ferro and M. Vlachos, editors, Working Notes of the Conference and Labs of the Evaluation Forum (CLEF 2023), Thessaloniki, Greece, September 18th to 21st, 2023, volume 3497, series CEUR Workshop Proceedings, pages 2441-2457. CEUR-WS.org, 2023.
Jüri Keller, Timo Breuer and Philipp Schaer.
[doi]  [BibTeX] 
Capturing Stability of Information Needs in Digital Libraries.
In: ACM/IEEE Joint Conference on Digital Libraries, JCDL 2023, Santa Fe, NM, USA, June 26-30, 2023, pages 276-278. IEEE, 2023.
Christin Katharina Kreutz, Philipp Schaer and Ralf Schenkel.
[doi] [pdf]  [BibTeX] 
Evaluating Digital Library Search Systems by Using Formal Process Modelling.
In: ACM/IEEE Joint Conference on Digital Libraries, JCDL 2023, Santa Fe, NM, USA, June 26-30, 2023, pages 1-12. IEEE, 2023.
Christin Katharina Kreutz, Martin Blum, Philipp Schaer, Ralf Schenkel and Benjamin Weyers.
[doi] [pdf]  [BibTeX] 
An in-depth investigation on the behavior of measures to quantify reproducibility.
Information Processing and Management, 60(3):103332, 2023.
Maria Maistro, Timo Breuer, Philipp Schaer and Nicola Ferro.
[doi] [pdf]  [BibTeX] 
ConvGenVisMo: Evaluation of Conversational Generative Vision Models.
In: ICML 2023 Workshop Artificial Intelligence and Human-Computer Interaction. 2023.
Narjes Nikzad-Khasmakhi, Meysam Asgari-Chenaghlu, Nabiha Asghar, Philipp Schaer and Dietlind Zühlke.
[doi] [pdf]  [BibTeX] 
Preliminary Results of a Scientometric Analysis of the German Information Retrieval Community 2020-2023.
In: M. Leyer and J. Wichmann, editors, Proceedings of the LWDA 2023 Workshops: BIA, DB, IR, KDML and WM. Marburg, Germany, 09.-11. October 2023, volume 3630, series CEUR Workshop Proceedings, pages 222-230. CEUR-WS.org, 2023.
Philipp Schaer, Svetlana Myshkina and Jüri Keller.
[doi] [pdf]  [BibTeX] 
Sprachmodelle und neuronale Netze im Information Retrieval.
In: R. Kuhlen, D. Lewandowski, W. Semar and C. Womser-Hacker, editors, Grundlagen der Informationswissenschaft, chapter C 9, pages 455-466. De Gruyter Saur, Berlin, Boston, 2023.
Philipp Schaer.
[doi] [pdf]  [BibTeX] 

2022

Proceedings of the 22nd ACM/IEEE Joint Conference on Digital Libraries.
JCDL '22. ACM, New York, NY, USA, 2022. OCLC: 1355716202.
Akiko Aizawa, Thomas Mandl, Zeljko Careciv, Annika Hinze, Philipp Mayr and Philipp Schaer.
[pdf]  [BibTeX] 
irmetadata: An Extensible Metadata Schema for IR Experiments.
In: Proceedings of the 45th International ACM SIGIR Conference on Research and Development in Information Retrieval, pages 3078-3089. ACM, 2022.
Timo Breuer, Jüri Keller and Philipp Schaer.
[doi] [pdf]  [BibTeX] 
Relevance assessments, bibliometrics, and altmetrics: a quantitative study on PubMed and arXiv.
Scientometrics, 127(5):2455-2478, 2022.
Timo Breuer, Philipp Schaer and Dirk Tunger.
[doi] [pdf]  [BibTeX] 
Validating Simulations of User Query Variants.
In: M. Hagen, S. Verberne, C. Macdonald, C. Seifert, K. Balog, K. Nørvåg and V. Setty, editors, Advances in Information Retrieval - 44th European Conference on IR Research, ECIR 2022, Stavanger, Norway, April 10-14, 2022, Proceedings, Part I, volume 13185, series Lecture Notes in Computer Science, pages 80-94. Springer, 2022.
Timo Breuer, Norbert Fuhr and Philipp Schaer.
[doi] [pdf]  [BibTeX] 
Auditing Search Query Suggestion Bias Through Recursive Algorithm Interrogation.
In: 14th ACM Web Science Conference 2022, pages 219–227. ACM, 2022.
Fabian Haak and Philipp Schaer.
[doi]  [BibTeX] 

2021

A Living Lab Architecture for Reproducible Shared Task Experimentation.
In: Information between Data and Knowledge, pages 348-362. Werner Hülsbusch, Glückstadt, 2021. Session 6: Emerging Technologies
Timo Breuer and Philipp Schaer.
[pdf]  [abstract]  [BibTeX] 
Evaluating Elements of Web-based Data Enrichment for Pseudo-Relevance Feedback Retrieval.
In: Experimental IR Meets Multilinguality, Multimodality, and Interaction. Proceedings of the Twelfth International Conference of the CLEF Association (CLEF 2021), series Lecture Notes in Computer Science. Springer Nature, 2021.
Timo Breuer, Melanie Pest and Philipp Schaer.
[pdf]  [BibTeX] 
reproeval: A Python Interface to Reproducibility Measures of System-Oriented IR Experiments.
In: D. Hiemstra, M. Moens, J. Mothe, R. Perego, M. Potthast and F. Sebastiani, editors, Advances in Information Retrieval - 43rd European Conference on IR Research, ECIR 2021, Virtual Event, March 28 - April 1, 2021, Proceedings, Part II, volume 12657, series Lecture Notes in Computer Science, pages 481-486. Springer, 2021.
Timo Breuer, Nicola Ferro, Maria Maistro and Philipp Schaer.
[doi] [pdf]  [BibTeX] 
IRCologne at TREC 2021 News Track - Relation-based re-ranking for background linking.
In: TREC. National Institute of Standards and Technology (NIST), 2021.
Björn Engelmann and Philipp Schaer.
[pdf]  [BibTeX] 
Perception-Aware Bias Detection for Query Suggestions.
In: L. Boratto, S. Faralli, M. Marras and G. Stilo, editors, Advances in Bias and Fairness in Information Retrieval - Second International Workshop on Algorithmic Bias in Search and Recommendation, BIAS 2021, Lucca, Italy, April 1, 2021, Proceedings, volume 1418, series Communications in Computer and Information Science. Springer Nature, Switzerland, 2021.
Fabian Haak and Philipp Schaer.
[pdf]  [BibTeX] 
Living Lab Evaluation for Life and Social Sciences Search Platforms - LiLAS at CLEF 2021.
In: D. Hiemstra, M. Moens, J. Mothe, R. Perego, M. Potthast and F. Sebastiani, editors, Advances in Information Retrieval - 43rd European Conference on IR Research, ECIR 2021, Virtual Event, March 28 - April 1, 2021, Proceedings, Part II, volume 12657, series Lecture Notes in Computer Science, pages 657-664. Springer, 2021.
Philipp Schaer, Johann Schaible and Leyla Jael Garca Castro.
[doi] [pdf]  [BibTeX] 
Overview of LiLAS 2021 - Living Labs for Academic Search.
In: K. S. Candan, B. Ionescu, L. Goeuriot, B. Larsen, H. Müller, A. Joly, M. Maistro, F. Piroi, G. Faggioli and N. Ferro, editors, Experimental IR Meets Multilinguality, Multimodality, and Interaction. Proceedings of the Twelfth International Conference of the CLEF Association (CLEF 2021), volume 12880, series Lecture Notes in Computer Science. 2021.
Philipp Schaer, Timo Breuer, Leyla Jael Castro, Benjamin Wolff, Johann Schaible and Narges Tavakolpoursaleh.
[pdf]  [BibTeX] 
Overview of LiLAS 2021 - Living Labs for Academic Search (Extended Overview).
In: G. Faggioli, N. Ferro, A. Joly, M. Maistro and F. Piroi, editors, Working Notes of CLEF 2021 - Conference and Labs of the Evaluation Forum, series CEUR Workshop Proceedings. 2021.
Philipp Schaer, Timo Breuer, Leyla Jael Castro, Benjamin Wolff, Johann Schaible and Narges Tavakolpoursaleh.
[pdf]  [BibTeX] 

2020

How to Measure the Reproducibility of System-oriented IR Experiments.
In: J. Huang, Y. Chang, X. Cheng, J. Kamps, V. Murdock, J.-R. Wen and Y. Liu, editors, SIGIR, pages 349-358. ACM, 2020.
Timo Breuer, Nicola Ferro, Norbert Fuhr, Maria Maistro, Tetsuya Sakai, Philipp Schaer and Ian Soboroff.
[doi] [pdf]  [BibTeX] 
Relations Between Relevance Assessments, Bibliometrics and Altmetrics.
In: Proceedings of the 10th International Workshop on Bibliometric-enhanced Information Retrieval co-located with 42nd European Conference on Information Retrieval, BIR@ECIR 2020, Lisbon, Portugal, April 14th, 2020 [online only], pages 101-112. 2020.
Timo Breuer, Philipp Schaer and Dirk Tunger.
[doi] [pdf]  [BibTeX] 
Conference Indexing in Digital Libraries: A Ranking Model and Case Study on dblp.
In: Proceedings of the 10th International Workshop on Bibliometric-enhanced Information Retrieval co-located with 42nd European Conference on Information Retrieval, BIR@ECIR 2020, Lisbon, Portugal, April 14th, 2020 [online only], pages 30-41. 2020.
Christopher Michels, Mandy Neumann, Philipp Schaer and Ralf Schenkel.
[doi] [pdf]  [BibTeX] 
Editorial.
Datenbank-Spektrum, 20(1):1-3, 2020.
Philipp Schaer, Klaus Berberich and Theo Härder.
[doi] [pdf]  [BibTeX] 
Licht und Schatten bei Online-Experimenten – Living Labs aus Sicht eines Forschenden.
In: C. Kaminsky, U. Seelmeyer, S. Siebert and P. Werner, editors, Digitale Technologien zwischen Lenkung und Selbstermächtigung. Beltz Juventa, Weinheim Basel, 2020.
Philipp Schaer.
[pdf]  [BibTeX] 
Living Labs for Academic Search at CLEF 2020.
In: J. M. Jose, E. Yilmaz, J. Magalhães, P. Castells, N. Ferro, Má. J. Silva and F. Martins, editors, Advances in Information Retrieval, pages 580-586. Springer International Publishing, Cham, 2020.
Philipp Schaer, Johann Schaible and Bernd Müller.
[pdf]  [abstract]  [BibTeX] 
Overview of LiLAS 2020 - Living Labs for Academic Search.
In: A. Arampatzis, E. Kanoulas, T. Tsikrika, S. Vrochidis, H. Joho, C. Lioma, C. Eickhoff, A. Névéol, L. Cappellato and N. Ferro, editors, CLEF, volume 12260, series Lecture Notes in Computer Science, pages 364-371. Springer, 2020.
Philipp Schaer, Johann Schaible and Leyla Jael García Castro.
[doi] [pdf]  [BibTeX] 
Overview of LiLAS 2020 - Living Labs for Academic Search Workshop Lab (extended abstract).
In: L. Cappellato, C. Eickhoff, N. Ferro and A. Névéol, editors, CLEF (Working Notes), volume 2696, series CEUR Workshop Proceedings. CEUR-WS.org, 2020.
Philipp Schaer, Johann Schaible and Leyla Jael García-Castro.
[doi] [pdf]  [BibTeX] 
Evaluation Infrastructures for Academic Shared Tasks.
Datenbank-Spektrum, 20(1):29-36, 2020.
Johann Schaible, Timo Breuer, Narges Tavakolpoursaleh, Bernd Müller, Benjamin Wolff and Philipp Schaer.
[doi] [pdf]  [abstract]  [BibTeX] 

2019

Information Extraction for Semi-structured Email Corpora.
In: R. Jäschke and M. Weidlich, editors, LWDA, volume 2454, series CEUR Workshop Proceedings, pages 322-330. CEUR-WS.org, 2019.
Hendrik Adam and Philipp Schaer.
[pdf]  [BibTeX] 
An investigation of biases in web search engine query suggestions.
Online Information Review, 44(2):365-381, 2019.
Malte Bonart, Anastasiia Samokhina, Gernot Heisenberg and Philipp Schaer.
[doi] [pdf]  [abstract]  [BibTeX] 
Dockerizing Automatic Routing Runs for The Open-Source IR Replicability Challenge (OSIRRC 2019).
In: R. Clancy, N. Ferro, C. Hauff, J. Lin, T. Sakai and Z. Z. Wu, editors, OSIRRC@SIGIR, volume 2409, series CEUR Workshop Proceedings, pages 31-35. CEUR-WS.org, 2019.
Timo Breuer and Philipp Schaer.
[pdf]  [BibTeX] 
Replicability and Reproducibility of Automatic Routing Runs.
In: L. Cappellato, N. Ferro, D. E. Losada and H. Müller, editors, CLEF (Working Notes), volume 2380, series CEUR Workshop Proceedings. CEUR-WS.org, 2019.
Timo Breuer and Philipp Schaer.
[pdf]  [BibTeX] 
STELLA: Towards a Framework for the Reproducibility of Online Search Experiments.
In: R. Clancy, N. Ferro, C. Hauff, J. Lin, T. Sakai and Z. Z. Wu, editors, OSIRRC@SIGIR, volume 2409, series CEUR Workshop Proceedings, pages 8-11. CEUR-WS.org, 2019.
Timo Breuer, Philipp Schaer, Narges Tavakolpoursaleh, Johann Schaible, Benjamin Wolff and Bernd Müller.
[pdf]  [BibTeX] 
Data Librarian – ein neuer Studienschwerpunkt für wissenschaftliche Bibliotheken und Forschungseinrichtungen.
Bibliothek Forschung und Praxis, 43(2018/04):255–261, 2019.
Simone Fühles-Ubach, Philipp Schaer, Klaus Lepsky and Ragna Seidler-de Alwis.
[pdf]  [BibTeX] 
Computational Methods in Professional Communication.
In: ProComm, pages 275-285. IEEE, 2019.
André Calero Valdez, Lena Adam, Dennis Assenmacher, Laura Burbach, Malte Bonart, Lena Frischlich and Philipp Schaer.
[pdf]  [BibTeX] 

2018

Intertemporal Connections Between Query Suggestions and Search Engine Results for Politics Related Queries.
In: EuroCSS 2018 Dataset Challenge. Cologne, 2018.
Malte Bonart and Philipp Schaer.
[doi] [pdf]  [BibTeX] 
Towards an IR Test Collection for the German National Library.
In: R. Gemulla, S. P. Ponzetto, C. Bizer, M. Keuper and H. Stuckenschmidt, editors, LWDA, volume 2191, series CEUR Workshop Proceedings, pages 275-280. CEUR-WS.org, 2018.
Johanna Munkelt, Philipp Schaer and Klaus Lepsky.
[doi] [pdf]  [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] [pdf]  [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] [pdf]  [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
Room
B5.420