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Prof. Dr. Philipp Schaer

Faculty of Information Science and Communication Studies

Institute of Information Science

Institute of Information Management

Prof. Dr. Philipp Schaer

Campus Südstadt
Claudiusstraße 1
50678 Köln
Mailing address


  • Phone: +49 221-8275-3845

Office hours

No fixed office hours

Campus Südstadt, Claudiusstr. 1, Room B5.420
Please make an appointment online: https://app.simplymeet.me/schaer

Teaching disciplines

  • Information Retrieval
  • Search Engines Technology
  • Natural Language Processing

Research fields

  • Information Retrieval
  • Digital Libraries
  • Evaluation of IR systems
  • Living Labs
  • Pradel, Franziska; Haak, Fabian; Proksch, Sven-Oliver; Schaer, Philipp (2024): Dynamics in Search Engine Query Suggestions for European Politicians. In: WEBSCI '24 : Proceedings of the 16th ACM Web Science Conference. 16th ACM Web Science Conference, Websci '24; Stuttgart, Germany; 21.05-24.05., S. 279 - 289. (Open Access)https://doi.org/10.1145/3614419https://doi.org/10.1145/3614419.3644006
  • Mayr, Philipp; Hinze, Annika; Schaer, Philipp (2024): Editorial to Special Issue of IJDL : Digital Library Research at the Inception of a Pandemic. In: International Journal on Digital Libraries. (Open Access)https://doi.org/10.1007/s00799-024-00407-3
  • Haak, Fabian; Engelmann, Björn; Kreutz, Christin Katharina; Schaer, Philipp (2024): Investigating Bias in Political Search Query Suggestions by Relative Comparison with LLMs. In: Companion Proceedings of the 16 th ACM Web Science Conference 2024 : Websci Companion '24, Reflecting on the Web, AI, and Society. Websci '24: 16th ACM Web Science Conference; Stuttgart, Germany; 21.05.- 24.05.2024., S. 5 - 7. (Open Access)https://doi.org/10.1145/3630744.3658415
  • Frick, Claudia; Schaer, Philipp (2024): ChatGPT, schreibe mir einen Aufsatz über Ursula Georgy. In: Fühles-Ubach, Simone; Oßwald, Achim; Schade, Frauke; Seidler-de Alwis, Ragna (Hrsg.): Engagement in der Informationswissenschaft : Festschrift für Ursula Georgy. Wiesbaden: b.i.t.verlag gmbh (b.i.t.online Innovativ), S. 36 - 51. (Open Access)
  • Schaer, Philipp; Kreutz, Christin Katharina; Balog, Krisztian; Breuer, Timo; Fuhr, Norbert (2024): SIGIR 2024 Workshop on Simulations for Information Access (Sim4IA 2024). In: SIGIR '24 : Proceedings of the 47th International ACM SIGIR Conference on Research and Development in Information Retrieval. SIGIR 2024: The 47th International ACM SIGIR Conference on Research and Development in Information Retrieval; Washington DC, USA; 14.07-18.07.2024., S. 3058 - 3061.https://doi.org/10.1145/3626772.3657991
  • Frick, Claudia; Schaer, Philipp (2024): ChatGPT, schreibe mir einen Aufsatz über Ursula Georgy. In: ePublications. (Open Access)https://doi.org/10.57683/EPUB-2731
  • Bui, Anh Thu Maria; Brech, Saskia Felizitas; Hußfeldt, Natalie; Jennert, Tobias; Ullrich, Melanie; Breuer, Timo; Nikzad Khasmakhi, Narjes; Schaer, Philipp (2024): The Two Sides of the Coin : Hallucination Generation and Detection with LLMs as Evaluators for LLMs. In: CLEF 2024 : Working Notes of the Conference and Labs of the Evaluation Forum. CLEF 2024, Conference and Labs of the Evaluation Forum; Grenoble, France; 09.09-12.09.2024., S. 727 - 758. (Open Access)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00013208
  • Keller, Jüri; Breuer, Timo; Schaer, Philipp (2024): Leveraging Prior Relevance Signals in Web Search. In: CLEF 2024 : Working Notes of the Conference and Labs of the Evaluation Forum. CLEF 2024, Conference and Labs of the Evaluation Forum; Grenoble, France; 09.09-12.09.2024., S. 2396 - 2406. (Open Access)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00013209
  • Keller, Jüri; Breuer, Timo; Schaer, Philipp (2024): Evaluation of Temporal Change in IR Test Collections. In: ICTIR 2024 - Proceedings of the 2024 ACM SIGIR International Conference on the Theory of Information Retrieval. ICTIR '24: The 2024 ACM SIGIR International Conference on the Theory of Information Retrieval; Washington, DC, USA; 13 July 2024., S. 3 - 13.https://doi.org/10.1145/3664190.3672530
  • Breuer, Timo; Fuhr, Norbert; Schaer, Philipp (2024): Validating Synthetic Usage Data in Living Lab Environments. In: Journal of Data and Information Quality, JDIQ. Vol. 16. (peer-reviewed)https://doi.org/10.1145/3623640
  • Kreutz, Christin Katharina; Haak, Fabian; Engelmann, Björn; Schaer, Philipp (2024): BATS: BenchmArking Text Simplicity. In: 62nd Annual Meeting of the Association for Computational Linguistics (ACL 2024) : Proceedings of the Conference. ACL 2024, The 62nd Annual Meeting of the Association for Computational Linguistics; Hybrid, Bangkok; Thailand; 11.08-16.08.2024., S. 11968 - 11989.https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00013367
  • Engelmann, Björn; Kreutz, Christin Katharina; Haak, Fabian; Schaer, Philipp (2024): ARTS: Assessing Readability & Text Simplicity. In: Findings of the Association for Computational Linguistics: EMNLP 2024. The 2024 Conference on Empirical Methods in Natural Language Processing; Miami, Florida, USA; 12.11.-16.11.2024., S. 14925 - 14942. (peer-reviewed/Open Access)https://doi.org/10.18653/v1/2024.findings-emnlphttps://doi.org/10.18653/v1/2024.findings-emnlp.877
  • Fröbe, Maik; Akiki, Christopher; Breuer, Timo; Eckart, Thomas; Friedrich, Annemarie; Gienapp, Lukas; Merker, Jan Heinrich; Potthast, Martin; Scells, Harrisen; Schaer, Philipp; Stein, Benno (2024): Teaching Information Retrieval with a Shared Task Across Universities : First Steps and Findings. In: LWDA’24: Lernen, Wissen, Daten, Analysen; Würzburg, Deutschland; 23.09.–25.09.2024. (Open Access)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00013880
  • Breuer, Timo; Kreutz, Christin Katharina; Fuhr, Norbert; Balog, Krisztian; Schaer, Philipp; Nolwenn, Bernard; Frommholz, Ingo; Gohsen, Marcel; Ji, Kaixin; Jones, Gareth J. F.; Keller, Jüri; Liu, Jiqun; Mladenov, Martin; Pasi, Gabriella; Trippas, Johanne; Wang, Xi; Zerhoudi, Saber; Zhai, ChengXiang (2024): Report on the Workshop on Simulations for Information Access (Sim4IA 2024) at SIGIR 2024. In: ACM SIGIR Forum. Vol. 58. (Open Access)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00014136
  • Keller, Jüri; Breuer, Timo; Schaer, Philipp (2024): 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. 15. International Conference of the CLEF Association; Grenoble, France; 09.09-12.09.2024., S. 215 - 226.https://doi.org/10.1007/978-3-031-71736-9https://doi.org/10.1007/978-3-031-71736-9_16
  • Breuer, Timo; Kreutz, Christin Katharina; Fuhr, Norbert; Balog, Krisztian; Schaer, Philipp; Nolwenn, Bernard; Frommholz, Ingo; Gohsen, Marcel; Ji, Kaixin; Jones, Gareth J. F.; Keller, Jüri; Liu, Jiqun; Mladenov, Martin; Pasi, Gabriella; Trippas, Johanne; Wang, Xi; Zerhoudi, Saber; Zhai, ChengXiang (2024): Report on the Workshop on Simulations for Information Access (Sim4IA 2024) at SIGIR 2024. In: De.arXiv.org., S. 1 - 14. (Open Access)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00013882
  • Engelmann, Björn; Breuer, Timo; Friese, Jana Isabelle; Schaer, Philipp; Fuhr, Norbert (2024): Context-Driven Interactive Query Simulations Based on Generative Large Language Models. In: Advances in Information Retrieval : 46th European Conference on Information Retrieval, ECIR 2024, Glasgow, UK, March 24–28, 2024, Proceedings, Part II. 46th European Conference on Information Retrieval, ECIR 2024; Glasgow, UK; 24.03.-28.03.2024., S. 173 - 188.https://doi.org/10.1007/978-3-031-56060-6https://doi.org/10.1007/978-3-031-56060-6_12
  • Maistro, Maria; Breuer, Timo; Schaer, Philipp; Ferro, Nicola (2023): An In-depth Investigation on the Behavior of Measures to Quantify Reproducibility. In: Information Processing and Management. Vol. 60. (Open Access)https://doi.org/10.1016/j.ipm.2023.103332
  • Haak, Fabian; Schaer, Philipp (2023): Qbias-A Dataset on Media Bias in Search Queries and Query Suggestions. In: WebSci '23: Proceedings of the 15th ACM Web Science Conference 2023. 15th ACM Web Science Conference 2023, WebSci 2023; Austin, TX; 30.04.-01.05.2023., S. 239 - 244.https://doi.org/10.1145/3578503.3583628
  • Engelmann, Björn; Haak, Fabian; Kreutz, Christin; Nikzad Khasmakhi, Narjes; Schaer, Philipp (2023): Text Simplification of Scientific Texts for Non-Expert Readers. In: CLEF 2023 : Working Notes of the Conference and Labs of the Evaluation Forum (CLEF 2023). Working Notes of the Conference and Labs of the Evaluation Forum (CLEF 2023); Thessaloniki, Greece; 18.09.-21.09.2023., S. 2987 - 2998. (peer-reviewed/Open Access)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00011221
  • Kreutz, Christin; Blum, Martin; Schaer, Philipp; Schenkel, Ralf; Weyers, Benjamin (2023): Evaluating Digital Library Search Systems by Using Formal Process Modelling. In: 2023 ACM/IEEE Joint Conference on Digital Libraries (JCDL) : Proceedings. ACM/IEEE Joint Conference on Digital Libraries 2023; Santa Fe, New Mexico, USA; 26.06.-30.06.2023., S. 1 - 12. (peer-reviewed)https://doi.org/10.1109/JCDL57899.2023https://doi.org/10.1109/JCDL57899.2023.00058
  • Breuer, Timo; Kreutz, Christin; Schaer, Philipp; Tunger, Dirk (2023): Bibliometric Data Fusion for Biomedical Information Retrieval. In: 2023 ACM/IEEE Joint Conference on Digital Libraries (JCDL) : Proceedings. ACM/IEEE Joint Conference on Digital Libraries 2023; Santa Fe, New Mexico, USA; 26.06.-30.06.2023., S. 107 - 118. (peer-reviewed)https://doi.org/10.1109/JCDL57899.2023https://doi.org/10.1109/JCDL57899.2023.00026
  • Kreutz, Christin; Schaer, Philipp; Schenkel, Ralf (2023): Capturing Stability of Information Needs in Digital Libraries. In: 2023 ACM/IEEE Joint Conference on Digital Libraries (JCDL) : Proceedings. ACM/IEEE Joint Conference on Digital Libraries 2023; Santa Fe, New Mexico, USA; 26.06.-30.06.2023., S. 276 - 278. (peer-reviewed)https://doi.org/10.1109/JCDL57899.2023https://doi.org/10.1109/JCDL57899.2023.00011
  • Keller, Jüri; Breuer, Timo; Schaer, Philipp (2023): Evaluating Temporal Persistence Using Replicability Measures. In: CLEF 2023 : Working Notes of the Conference and Labs of the Evaluation Forum (CLEF 2023). Working Notes of the Conference and Labs of the Evaluation Forum (CLEF 2023); Thessaloniki, Greece; 18.09.-21.09.2023. Vol. 3497, S. 2441 - 2457. (peer-reviewed)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00011350
  • Schaer, Philipp; Myshkina, Svetlana; Keller, Jüri (2023): Preliminary Results of a Scientometric Analysis of the German Information Retrieval Community 2020-2023. In: De.arXiv.org. LWDA ’23: Lernen, Wissen, Daten, Analysen; Marburg, Germany; October 09–11, 2023. (peer-reviewed/Open Access)https://doi.org/10.48550/arXiv.2310.07346
  • Schaer, Philipp (2023): Sprachmodelle und neuronale Netze im Information Retrieval. In: Kuhlen, Rainer; Lewandowski, Dirk; Semar, Wolfgang; Womser-Hacker, Christa (Hrsg.): Grundlagen der Informationswissenschaft. Berlin: De Gruyter, S. 455 - 466. (peer-reviewed/Open Access) https://doi.org/10.1515/9783110769043https://doi.org/10.1515/9783110769043-039
  • Nikzad Khasmakhi, Narjes; Asgari-Chenaghlu, Meysam; Asghar, Nabiha; Schaer, Philipp; Zühlke, Dietlind (2023): ConvGenVisMo: Evaluation of Conversational Generative Vision Models. In: De.arXiv.org. AI & HCI Workshop at the 40th International Conference on Machine Learning (ICML), 2023.. (Open Access)https://doi.org/10.48550/arXiv.2305.17784
  • Engelmann, Björn; Breuer, Timo; Schaer, Philipp (2023): Simulating Users in Interactive Web Table Retrieval. In: CIKM '23: Proceedings of the 32nd ACM International Conference on Information and Knowledge Management. CIKM '23: The 32nd ACM International Conference on Information and Knowledge Management; Birmingham, United Kingdom; October 21 - 25, 2023., S. 3875 - 3879.https://doi.org/10.1145/3583780https://doi.org/10.1145/3583780.3615187
  • Bauer, Christine; Carterette, Ben; Ferro, Nicola; Fuhr, Norbert; Beel, Joeran; Breuer, Timo; Clarke, Charles L. A.; Crescenzi, Anita; Demartini, Gianluca; Di Nunzio, Giorgio Maria; Dietz, Laura; Faggioli, Guglielmo; Ferwerda, Bruce; Fröbe, Maik; Hagen, Matthias; Hanbury, Allan; Hauff, Claudia; Jannach, Dietmar; Kando, Noriko; Kanoulas, Evangelos; Knijnenburg, Bart P.; Kruschwitz, Udo; Li, Meijie; Maistro, Maria; Michiels, Lien; Papenmeier, Andrea; Potthast, Martin; Rosso, Paolo; Said, Alan; Schaer, Philipp; Seifert, Christin; Spina, Damiano; Stein, Benno; Tintarev, Nava; Urbano, Julián; Wachsmuth, Henning; Willemsen, Martijn C.; Zobel, Justin (2023): Report on the Dagstuhl Seminar on Frontiers of Information Access Experimentation for Research and Education. In: ACM SIGIR Forum. Vol. 57, S. 1 - 28.https://doi.org/10.1145/3636341.3636351
  • Schaer, Philipp; Myshkina, Svetlana; Keller, Jüri (2023): Preliminary Results of a Scientometric Analysis of the German Information Retrieval Community 2020-2023. In: LWDA 2023 : Lernen, Wissen, Daten, Analysen (LWDA) Conference Proceedings. LWDA 2023 Lernen, Wissen, Daten, Analysen 2023; Marburg, Germany; 09.10.-11.10.2023. Vol. 3630, S. 222 - 230. (Open Access)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00012135
  • Keller, Jüri; Bittkowski, Meik; Schaer, Philipp (2023): Automated Statement Extraction from Press Briefings. In: Datenbanksysteme für Business, Technologie und Web (BTW 2023) : 06.-10. März 2023 in Dresden, Deutschland. BTW 2023 Dresden - 20th Conference on Database Systems for Business, Technology and Web; Dresden, Germany; 06.03.-10.03.2023., S. 1049 - 1057. (Open Access)https://doi.org/10.18420/BTW2023-71
  • Engelmann, Björn; Schaer, Philipp (2023): Reliable Rules for Relation Extraction in a Multimodal Setting. In: Datenbanksysteme für Business, Technologie und Web (BTW 2023) : 06.-10. März 2023 in Dresden, Deutschland. BTW 2023 Dresden - 20th Conference on Database Systems for Business, Technology and Web; Dresden, Germany; 06.03.-10.03.2023. Vol. P-331, S. 1009 - 1021. (Open Access)https://doi.org/10.18420/BTW2023-69
  • Breuer, Timo; Fuhr, Norbert; Schaer, Philipp (2022): Validating Simulations of User Query Variants. In: Advances in Information Retrieval : 44th European Conference on IR Research, ECIR 2022, Stavanger, Norway, April 10-14, 2022, Proceedings, Part I. Retrieval Book Subtitle 44th European Conference on IR Research; Stavanger, Norway; 10.04.-14.04.2022., S. 80 - 94. (peer-reviewed)https://doi.org/10.1007/978-3-030-99736-6https://doi.org/10.1007/978-3-030-99736-6_6
  • Aizawa, Akiko; Mandl, Thomas; Carevic, Zeljko; Hinze, Annika; Mayr, Philipp; Schaer, Philipp (2022): JCDL 2022 Chairs' Welcome. Proceedings of the ACM/IEEE Joint Conference on Digital Libraries. [Piscataway, NJ]: IEEE, S. iii - iv. https://doi.org/10.1145/3529372
  • Haak, Fabian; Schaer, Philipp (2022): Auditing Search Query Suggestion Bias Through Recursive Algorithm Interrogation. In: WebSci '22: Proceedings of the 14th ACM Web Science Conference 2022. 14th ACM Web Science Conference, WebSci 2022; Virtual, Online; 26.06.-29.06.2022., S. 219 - 227. (peer-reviewed)https://doi.org/10.1145/3501247.3531567
  • Breuer, Timo; Keller, Jüri; Schaer, Philipp (2022): ir_metadata : An Extensible Metadata Schema for IR Experiments. In: SIGIR 2022 : Proceedings of the 45th International ACM SIGIR Conference on Research and Development in Information Retrieval. SIGIR 22; Madrid, Spain; 11.07.-15.07.2022., S. 3078 - 3089. (peer-reviewed)https://doi.org/10.1145/3477495https://doi.org/10.1145/3477495.3531738
  • Breuer, Timo; Schaer, Philipp; Tunger, Dirk (2022): Relevance Assessments, Bibliometrics, and Altmetrics: A Quantitative Study on PubMed and ArXiv. In: Scientometrics. Vol. 127, S. 2455 - 2478. (peer-reviewed/Open Access)https://doi.org/10.1007/s11192-022-04319-4
  • Haak, Fabian; Schaer, Philipp (2021): Perception-Aware Bias Detection for Query Suggestions. In: Boratto, Ludovico; Faralli, Stefano; Marras, Mirko; Stilo, Giovanni (Hrsg.): Advances in Bias and Fairness in Information Retrieval. Cham: Springer, S. 130 - 142. (peer-reviewed) https://doi.org/10.1007/978-3-030-78818-6_12
  • Breuer, Timo; Ferro, Nicola; Maistro, Maria; Schaer, Philipp (2021): repro_eval : A Python Interface to Reproducibility Measures of System-Oriented IR Experiments. In: Hiemstra, Djoerd; Moens, Marie-Francine; Mothe, Josiane; Perego, Raffaele; Potthast, Martin; Sebastiani, Fabrizio (Hrsg.): Advances in Information Retrieval : 43rd European Conference on IR Research, ECIR 2021, Virtual Event, March 28 – April 1, 2021, Proceedings, Part II. Cham: Springer International Publishing, S. 481 - 486. (peer-reviewed) https://doi.org/10.1007/978-3-030-72240-1https://doi.org/10.1007/978-3-030-72240-1_51
  • Schaer, Philipp; Schaible, Johann; Castro, Leyla Jael (2021): Living Lab Evaluation for Life and Social Sciences Search Platforms : LiLAS at CLEF 2021. In: Hiemstra, Djoerd; Moens, Marie-Francine; Mothe, Josiane; Perego, Raffaele; Potthast, Martin; Sebastiani, Fabrizio (Hrsg.): Advances in Information Retrieval : 43rd European Conference on IR Research, ECIR 2021, Virtual Event, March 28 – April 1, 2021, Proceedings, Part II. Cham: Springer International Publishing, S. 657 - 664. (peer-reviewed) https://doi.org/10.1007/978-3-030-72240-1https://doi.org/10.1007/978-3-030-72240-1_77
  • Schaer, Philipp; Breuer, Timo; Castro, Leyla Jael; Wolff, Benjamin; Schaible, Johann; Tavakolpoursaleh, Narges (2021): Overview of LiLAS 2021 : Living Labs for Academic Search (Extended Overview). In: CLEF 2021 Working Notes : Proceedings of the Working Notes of CLEF 2021. CLEF 2021 Conference and Labs of the Evaluation Forum Information Access Evaluation meets Multilinguality, Multimodality, and Visualization; Bucharest, Romania; 21.09.-24.09.2021., S. 1668 - 1699. (Open Access)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00006356
  • Breuer, Timo; Pest, Melanie; Schaer, Philipp (2021): Evaluating Elements of Web-Based Data Enrichment for Pseudo-Relevance Feedback Retrieval. In: Candan, K. Selcuk; Ionescu, Bogdan; Goeuriot, Lorraine; Larsen, Birger; Müller, Henning; Joly, Alexis; Maistro, Maria; Piroi, Florina; Faggioli, Guglielmo; Ferro, Nicola (Hrsg.): Experimental IR Meets Multilinguality, Multimodality, and Interaction : 12th International Conference of the CLEF Association, CLEF 2021, Virtual Event, September 21–24, 2021, Proceedings. Cham: Springer (Lecture Notes in Computer Science), S. 53 - 64. (peer-reviewed) https://doi.org/10.1007/978-3-030-85251-1https://doi.org/10.1007/978-3-030-85251-1_5
  • Breuer, Timo; Schaer, Philipp (2021): A Living Lab Architecture for Reproducible Shared Task Experimentation. In: Information between Data and Knowledge. Information Science and its Neighbors from Data Science to Digital Humanities : Proceedings of the 16th International Symposium of Information Science (ISI 2021). 16th International Symposium of Information Science (ISI 2021); Regensburg, Germany; 08.03.-10.03.2021., S. 348 - 362. (peer-reviewed/Open Access)https://doi.org/10.5283/epub.44953
  • Engelmann, Björn; Schaer, Philipp (2021): IRCologne at TREC 2021 News Track : Relation-Based Re-ranking for Background Linking. In: The Thirtieth Text REtrieval Conference (TREC 2021) Proceedings. Text Retrieval Conference (TREC) 2021; online; 15.11.-19.11.2021., S. 1 - 6. (peer-reviewed/Open Access)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00007830
  • Schaer, Philipp; Breuer, Timo; Castro, Leyla Jael; Wolff, Benjamin; Schaible, Johann; Tavakolpoursaleh, Narges (2021): Overview of LiLAS 2021 - Living Labs for Academic Search. In: Experimental IR Meets Multilinguality, Multimodality, and Interaction : 12th International Conference of the CLEF Association, CLEF 2021, Virtual Event, September 21–24, 2021, Proceedings. International Conference of the Cross-Language Evaluation Forum for European Languages; Virtual Event; 21.09.-24.09.2021., S. 394 - 418. (peer-reviewed)https://doi.org/10.1007/978-3-030-85251-1https://doi.org/10.1007/978-3-030-85251-1_25
  • Schaer, Philipp; Schaible, Johann; Müller, Bernd (2020): Living Labs for Academic Search at CLEF 2020. In: Jose, Joemon M.; Yilmaz, Emine; Magalhães, João; Castells, Pablo; Ferro, Nicola; Silva, Mário J.; Martins, Flávio (Hrsg.): Advances in Information Retrieval : Proceedings, Part II. Cham: Springer (Lecture Notes in Computer Science), S. 580 - 586. (peer-reviewed/Open Access) https://doi.org/10.1007/978-3-030-45442-5_75
  • Schaer, Philipp; Schaible, Johann; Castro, Leyla Jael García (2020): Overview of LiLAS 2020 - Living Labs for Academic Search. In: Arampatzis, Avi; Kanoulas, Evangelos; Tsikrika, Theodora; Vrochidis, Stefanos; Joho, Hideo; Lioma, Christina; Eickhoff, Carsten; Névéol, Aurélie; Cappellato, Linda; Ferro, Nicola (Hrsg.): Experimental IR Meets Multilinguality, Multimodality, and Interaction : Proceedings. Cham: Springer (Lecture Notes in Computer Science), S. 364 - 371. (peer-reviewed/Open Access) https://doi.org/10.1007/978-3-030-58219-7_24
  • Breuer, Timo; Ferro, Nicola; Fuhr, Norbert; Maistro, Maria; Sakai, Tetsuya; Schaer, Philipp; Soboroff, Ian (2020): How to Measure the Reproducibility of System-oriented IR Experiments. In: Huang, Jimmy; Chang, Yi; Cheng, Xueqi; Kamps, Jaap; Murdock, Vanessa; Wen, Ji-Rong; Liu, Yiqun (Hrsg.): SIGIR '20 : Proceedings of the 43rd International ACM SIGIR Conference on Research and Development in Information Retrieval. New York: Association for Computing Machinery, S. 349 - 358. (peer-reviewed/Open Access) https://doi.org/10.1145/3397271.3401036
  • Breuer, Timo; Schaer, Philipp; Tunger, Dirk (2020): Relations Between Relevance Assessments, Bibliometrics and Altmetrics. In: Cabanac, Guillaume; Frommholz, Ingo; Mayr, Philipp (Hrsg.): BIR 2020 - Bibliometric-enhanced Information Retrieval : Proceedings of the 10th International Workshop on Bibliometric-enhanced Information Retrieval co-located with 42nd European Conference on Information Retrieval (ECIR 2020). Aachen: RWTH Aachen (CEUR workshop proceedings), S. 101 - 112. (peer-reviewed/Open Access)
  • Schaer, Philipp; Schaible, Johann; García-Castro, Leyla Jael (2020): Overview of LiLAS 2020 - Living Labs for Academic Search Workshop Lab : Extended Abstract. In: Cappellato, Linda; Eickhoff, Carsten; Ferro, Nicola; Névéol, Aurélie (Hrsg.): Working Notes of CLEF 2020 : Conference and Labs of the Evaluation Forum. Aachen: RWTH Aachen, CEUR-WS. (peer-reviewed/Open Access)
  • Michels, Christopher; Neumann, Mandy; Schaer, Philipp; Schenkel, Ralf (2020): Conference Indexing in Digital Libraries : A Ranking Model and Case Study on dblp. In: Cabanac, Guillaume; Frommholz, Ingo; Mayr, Philipp (Hrsg.): BIR 2020 - Bibliometric-enhanced Information Retrieval : Proceedings of the 10th International Workshop on Bibliometric-enhanced Information Retrieval co-located with 42nd European Conference on Information Retrieval (ECIR 2020). Aachen: RWTH Aachen (CEUR workshop proceedings), S. 30 - 41. (peer-reviewed/Open Access)
  • Schaer, Philipp (2020): Licht und Schatten bei Online-Experimenten : Living Labs aus Sicht eines Forschenden. In: Kaminsky, Carmen; Seelmeyer, Udo; Schaffrath, Scarlet La Shea; Werner, Petra (Hrsg.): Digitale Technologien zwischen Lenkung und Selbstermächtigung : Interdisziplinäre Perspektiven. Weinheim; Basel: Beltz Juventa, S. 116 - 130. (peer-reviewed/Open Access)
  • Schaer, Philipp; Berberich, Klaus; Härder, Theo (2020): Editorial. In: Datenbank-Spektrum : Zeitschrift für Datenbanktechnologie und Information Retrieval. Vol. 20, S. 1 - 3. (peer-reviewed/Open Access)https://doi.org/10.1007/s13222-020-00338-8
  • Schaible, Johann; Breuer, Timo; Tavakolpoursaleh, Narges; Müller, Bernd; Wolff, Benjamin; Schaer, Philipp (2020): Evaluation Infrastructures for Academic Shared Tasks : Requirements and Concept Design for Search and Recommendation Scenarios. In: Datenbank-Spektrum : Zeitschrift für Datenbanktechnologie und Information Retrieval. Vol. 20, S. 29 - 36. (peer-reviewed/Open Access)https://doi.org/10.1007/s13222-020-00335-x
  • Adam, Hendrik; Schaer, Philipp (2019): Information Extraction for Semi-structured Email Corpora.. In: Jäschke, Robert; Weidlich, Matthias (Hrsg.): LWDA 2019: Lernen, Wissen, Daten, Analysen 2019 : Proceedings of the Conference on "Lernen, Wissen, Daten, Analysen". CEUR-WS, S. 322 - 330. (peer-reviewed/Open Access)
  • Bonart, Malte; Samokhina, Anastasiia; Heisenberg, Gernot; Schaer, Philipp (2019): An Investigation of Biases in Web Search Engine Query Suggestions. In: Online Information Review : The International Journal of Digital Information Research and Use. Vol. 44, S. 365 - 381. (Open Access)https://doi.org/10.1108/OIR-11-2018-0341
  • Breuer, Timo; Schaer, Philipp; Tavakolpoursaleh, Narges; Schaible, Johann; Wolff, Benjamin; Müller, Bernd (2019): STELLA : Towards a Framework for the Reproducibility of Online Search Experiments. In: Clancy, Ryan; Ferro, Nicola; Hauff, Claudia; Lin, Jimmy; Sakai, Tetsuya; Wu, Ze Zhong (Hrsg.): Proceedings of the Open-Source IR Replicability Challenge (OSIRRC 2019) : Co-located with 42nd International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2019). Aachen: RWTH Aachen, CEUR-WS, S. 8 - 11. (peer-reviewed/Open Access)
  • Breuer, Timo; Schaer, Philipp (2019): Dockerizing Automatic Routing Runs for The Open-Source IR Replicability Challenge (OSIRRC 2019). In: Clancy, Ryan; Ferro, Nicola; Hauff, Claudia; Lin, Jimmy; Sakai, Tetsuya; Wu, Ze Zhong (Hrsg.): Proceedings of the Open-Source IR Replicability Challenge (OSIRRC 2019) : Co-located with 42nd International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR 2019). Aachen: RWTH Aachen, CEUR-WS, S. 31 - 35. (peer-reviewed/Open Access)
  • Breuer, Timo; Schaer, Philipp (2019): Replicability and Reproducibility of Automatic Routing Runs. In: Cappellato, Linda; Ferro, Nicola; Losada, David E.; Müller, Henning (Hrsg.): Working Notes of CLEF 2019 : Conference and Labs of the Evaluation Forum. Aachen: RWTH Aachen, CEUR-WS. (peer-reviewed/Open Access)
  • Calero Valdez, Andre; Adam, Lena; Assenmacher, Dennis; Burbach, Laura; Bonart, Malte; Frischlich, Lena; Schaer, Philipp (2019): Computational Methods in Professional Communication. 2019 IEEE International Professional Communication Conference. Piscataway, NJ: IEEE, S. 275 - 285. (peer-reviewed) https://doi.org/10.1109/ProComm.2019.00063https://doi.org/10.1109/ProComm43636.2019
  • Fühles-Ubach, Simone; Schaer, Philipp; Lepsky, Klaus; Seidler-de Alwis, Ragna (2019): Data Librarian : Ein neuer Studienschwerpunkt für wissenschaftliche Bibliotheken und Forschungseinrichtungen. In: Bibliothek : Forschung und Praxis. Vol. 43, S. 255 - 261. (Open Access)https://doi.org/10.1515/bfp-2019-2053https://doi.org/10.1515/bfup
  • Bonart, Malte; Schaer, Philipp (2018): Intertemporal Connections Between Query Suggestions and Search Engine Results for Politics Related Queries. In: EuroCSS 2018 Dataset Challenge; Cologne, Germany; 05.12.-07.12.2018. (peer-reviewed/Open Access)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00002035
  • Munkelt, Johanna; Schaer, Philipp; Lepsky, Klaus (2018): Towards an IR Test Collection for the German National Library. In: Gemulla, Rainer; Ponzetto, Simone Paolo; Bizer, Christian; Keuper, Margret; Stuckenschmidt, Heiner (Hrsg.): LWDA 2018: Lernen, Wissen, Daten, Analysen 2018 : Proceedings of the Conference "Lernen, Wissen, Daten, Analysen". Aachen: RWTH Aachen (CEUR Workshop Proceedings), S. 275 - 280. (peer-reviewed/Open Access)
  • Neumann, Mandy; Michels, Christopher; Schaer, Philipp; Schenkel, Ralf (2018): Prioritizing and Scheduling Conferences for Metadata Harvesting in dblp. In: Chen, Jiangping; Gonçalves, Marcos André; Allen, Jeff M. (Hrsg.): JCDL '18 : Proceedings of the 18th ACM/IEEE on Joint Conference on Digital Libraries. New York: ACM, S. 45 - 48. (peer-reviewed/Open Access) https://doi.org/10.1145/3197026.3197069
  • Jagerman, Rolf; de Rijke, Maarten; Balog, Krisztian; Schaer, Philipp; Schaible, Johann; Tavakolpoursaleh, Narges (2017): Overview of TREC OpenSearch 2017. In: Voorhees, Ellen M.; Ellis, Angela (Hrsg.): The Twenty-Sixth Text REtrieval Conference (TREC 2017) Proceedings. Boulder: National Institute of Standards and Technology (NIST), US Gov. Print. Off.. (peer-reviewed)
  • Neumann, Mandy; Schaer, Philipp (2017): Enriching Existing Test Collections with OXPath. In: Jones, Gareth J.F.; Lawless, Séamus; Gonzalo, Julio; Kelly, Liadh; Goeuriot, Lorraine; Mandl, Thomas; Cappellato, Linda; Ferro, Nicola (Hrsg.): CLEF 2017 International Conference of the Cross-Language Evaluation Forum for European Languages : Experimental IR Meets Multilinguality, Multimodality, and Interaction. Cham: Springer, S. 152 - 158. (peer-reviewed) https://doi.org/10.1007/978-3-319-65813-1
  • Neumann, Mandy; Steinberg, Jan; Schaer, Philipp (2017): Web-Scraping for Non-Programmers : Introducing OXPath for Digital Library Metadata Harvesting. In: Code4Lib journal., S. 10 - 18. (peer-reviewed)https://bibliografie.th-koeln.de/servlets/DozBibEntryServlet?mode=show&id=bibthk_mods_00003297
  • Tavakolpoursaleh, Narges; Neumann, Mandy; Schaer, Philipp (2017): IR-Cologne at TREC 2017 OpenSearch Track : Rerunning Popularity Ranking Experiments in a Living Lab. In: Voorhees, Ellen M.; Ellis, Angela (Hrsg.): The Twenty-Sixth Text REtrieval Conference (TREC 2017) Proceedings. Boulder: National Institute of Standards and Technology (NIST), US Gov. Print. Off., S. 1 - 6. (peer-reviewed)
  • Schaer, Philipp (2017): Living Labs : An Ethical Challenge for Researchers and Platform Providers. In: Zimmer, Michael; Kinder-Kurlanda, Katharina (Hrsg.): Internet Research Ethics for the Social Age : New Challenges, Cases, and Contexts. New York: Peter Lang, Lang, S. 167 - 176. (peer-reviewed)
  • Balog, Krisztian; Schuth, Anne; Dekker, Peter; Tavakolpoursaleh, Narges; Schaer, Philipp; Chuang, Po-Yu (2016): Overview of the TREC 2016 Open Search Track : Academic Search Edition. In: Vorhees, Ellen M.; Ellis, Angela (Hrsg.): The Twenty-Fifth Text REtrieval Conference (TREC 2016) Proceedings : NIST Special Publication: SP 500-321.. (peer-reviewed)
  • Posch, Lisa; Schaer, Philipp; Bleier, Arnim; Strohmaier, Markus (2016): A System for Probabilistic Linking of Thesauri and Classification Systems. In: Künstliche Intelligenz. Vol. 30, S. 193 - 196. (peer-reviewed)https://doi.org/10.1007/s13218-015-0413-9
  • Schaer, Philipp; Mayr, Philipp; Sünkler, Sebastian; Lewandowski, Dirk (2016): How Relevant is the Long Tail? A Relevance Assessment Study on Million Short. In: Fuhr, Norbert; Quaresma, Paulo; Gonçalves, Teresa; Larsen, Birger; Balog, Krisztian; Macdonald, Craig; Cappellato, Linda; Ferro, Nicola (Hrsg.): Experimental IR Meets Multilinguality, Multimodality, and Interaction : CLEF 2016. Cham: Springer International Publishing, Springer, S. 227 - 233. https://doi.org/10.1007/978-3-319-44564-9
  • Schaer, Philipp; Tavakolpoursaleh, Narges (2016): Ideas for a Standard LL4IR Extension : Living Labs from a System Operator’s Perspective. In: Balog, Krisztian; Cappellato, Linda; Ferro, Nicola; Macdonald, Craig (Hrsg.): Working Notes of CLEF 2016 : Conference and Labs of the Evaluation Forum. Aachen: RWTH Aachen, S. 591 - 592. (peer-reviewed)
  • Schaer, Philipp; Tavakolpoursaleh, Narges (2016): Popularity Ranking for Scientific Literature using the Characteristic Scores and Scale Method. In: Vorhees, Ellen M.; Ellis, Angela (Hrsg.): The Twenty-Fifth Text REtrieval Conference (TREC 2016) Proceedings : NIST Special Publication: SP 500-321., S. 1 - 22. (peer-reviewed)
  • Full professor membership at theGraduate School for Applied Research in North Rhine-Westphalia (PK NRW)
    Promotionskolleg NRW
  • ACM - Association for Computing Machinery
    Professionell membership and member of SIGIR
    SIGIR
  • GI - German Computer Science Society
    Chair of Fachgruppe Information Retrieval
    Special Interest Group for Information Retrieval
  • Wikimedia Germany

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