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Prof. Dr. Philipp Schaer

Fakultät für Informations- und Kommunikationswissenschaften Institut für Informationswissenschaft (IWS) Institut für Informationsmanagement (IIM)

Prof. Dr. Philipp Schaer

Campus Südstadt
Claudiusstraße 1
50678 Köln
Postanschrift


  • Telefon+49 221-8275-3845

Sprechstunden

No fixed office hours

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

Funktionen

  • InstitutsdirektorIn

Lehrgebiete

  • Information Retrieval
  • Search Engines Technology
  • Natural Language Processing

Forschungsgebiete

  • Digital Libraries
  • Evaluation of IR systems
  • Living Labs
  • STELLA - Infrastructures For Living Labs
    The STELLA project (funded by DFG) aims to create an evaluation infrastructure that allows to evaluate search and recommendation services within productive web-based search systems with real users. STELLA provides an integrated e-Research environment that allows researchers in the field of information retrieval and recommendation services to conduct studies with real users in real environments. The experimental set-ups differ considerably from classical TREC studies, which can only be carried out offline, or also from user studies, which only allow laboratory experiments, and thus enable researchers to use an evaluation method that was previously reserved only for industrial research or the operators of large online platforms.
    Project page at ir.web.th-koeln.de
  • ESUPOL - Einfluss von Suchmaschinen auf die politische Meinungsbildung
    In this MKW-funded project, the question of how search engines can influence political opinion-forming and political issues is to be addressed, and what influence factors such as 'filter bubbles', collaborative filtering and the lack of users' search or media competence have on these processes.
    Projekt page at ir.web.th-koeln.de
  • Smart Harvesting II
    Within the DFG-funded Smart Harvesting project we would like to develop a 'smart' set of tools and workflows to allow non-programmers to build a rich set of web scrapers to build online bibliographies out of freely available web resources.
    Project page at ir.web.th-koeln.de
  • PRIOR - PRepublicatIOn Radar
    PRIOR, the PRepublicatIOn Radar (funded by Google's Digital News Initiative) will be an integrated tool for science journalists to keep up with the latest scientific research in important domains of knowledge. It will enable them to detect and filter potentially interesting studies in a diverse set of scientific journals. The challenge is to deal with unstructured and heterogeneous incoming information types. PRIOR will extract, harmonize and process new embargoed research publications to allow searching, browsing and filtering. The prototype will work with two modules: a data extraction and harmonization framework as well as a web-based user interface to find new and filter relevant scientific publications.
    Projekt page at ir.web.th-koeln.de
  • 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)
  • 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.
  • 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)
  • 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)
  • Breuer, Timo; Schaer, Philipp; Tunger, Dirk (2022): Relevance assessments, bibliometrics, and altmetrics: a quantitative study on PubMed and arXiv. In: Scientometrics. (peer-reviewed/Open Access)
  • Schaer, Philipp (2022): 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)
  • 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.
  • 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)
  • 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)
  • Breuer, Timo; Fuhr, Norbert; Schaer, Philipp (2022): Validating Simulations of User Query Variants. (peer-reviewed)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • Fühles-Ubach, Simone; Schaer, Philipp; Lepsky, Klaus; Seidler-de Alwis, Ragna (2019): Data Librarian : Ein neuer Studienschwerpunkt für wissenschaftliche Bibliotheken und Forschungseinrichtungen. In: Bibliothek. Vol. 43, S. 255 - 261. (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. Vol. 44, S. 365 - 381. (Open Access)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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; 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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.
  • 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)
  • 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 - Gesellschaft für Informatik
    Chair of Fachgruppe Information Retrieval
    FG Information Retrieval
  • Wikimedia Deutschland

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