Luke Gallagher

programming / email

My research is predominantly via the lens of Information Retrieval and includes—efficient candidate retrieval and ranking, learning-to-rank and feature extraction, multi-stage retrieval systems, web search and system evaluation. I have broad interests in search engines, operating systems and algorithms.

Publications

• Re-evaluating the Command-and-Control Paradigm in Conversational Search Interactions
  J. R. Trippas, L. Gallagher, J. Mackenzie. Proc 33rd ACM Int. Conf. on Information and Knowledge Management, 2024. pdf
• What Do Users Really Ask Large Language Models?
  J. R. Trippas, S. F. D. Al Lawati, J. Mackenzie, L. Gallagher. Proc. 47th Ann. Int. ACM SIGIR Conf. on Research and Development in Information Retrieval, 2024. pdf
• Can Generative LLMs Create Query Variants for Test Collections?
  M. Alaofi, L. Gallagher, M. Sanderson, F. Scholer and P. Thomas. Proc. 46th Ann. Int. ACM SIGIR Conf. on Research and Development in Information Retrieval, 2023. pdf
• IOQP: A simple Impact-Ordered Query Processor written in Rust
  J. Mackenzie, M. Petri, L. Gallagher. Proc. 3rd Int. Conf. on Design of Experimental Search and Information Retrieval Systems, 2022. pdf
• Where Do Queries Come From?
  M. Alaofi, L. Gallagher, D. Mckay, L. L. Saling, M. Sanderson, F. Scholer, D. Spina, R. W. White. Proc 45th Int. ACM SIGIR Conf. on Research and Development in Information Retrieval, 2022. pdf
• Feature Extraction for Large-Scale Text Collections
  L. Gallagher, A. Mallia, J. S. Culpepper, T. Suel and B. B. Cambazoglu. Proc 29th ACM Int. Conf. on Information and Knowledge Management, 2020. pdf
• Efficiency Implications of Term Weighting for Passage Retrieval
  J. Mackenzie, Z. Dai, L. Gallagher and J. Callan. Proc 43rd Int. ACM SIGIR Conf. on Research and Development in Information Retrieval, 2020. pdf
• Joint Optimization of Cascade Ranking Models
  L. Gallagher, R-C. Chen, R. Blanco, and J. S. Culpepper. Proc. 12th Int. Conf. on Web Search and Data Mining, 2019. pdf
• Revisiting Spam Filtering in Web Search
  L. Gallagher, J. Mackenzie, J. S. Culpepper. Proc. 23rd Australasian Document Computing Symp., 2018. pdf
• RMIT at the TREC CORE Track
  R. Benham, L. Gallagher, J. Mackenzie, B. Liu, X. Lu, F. Scholer, A. Moffat, and J. S. Culpepper. Proc. 27th Text Retrieval Conf., 2018. pdf
• Towards Efficient and Effective Query Variant Generation
  R. Benham, J. S. Culpepper, L. Gallagher, X. Lu, and J. Mackenzie. Proc. 1st Int. Conf. on Design of Experimental Search and Information Retrieval Systems, 2018. pdf
• RMIT at the TREC CORE Track
  R. Benham, L. Gallagher, J. Mackenzie, T. T. Damessie, R-C. Chen, F. Scholer, A. Moffat, and J. S. Culpepper. Proc. 26th Text Retrieval Conf., 2017. pdf
• RMIT at the NTCIR We Want Web Track
  L. Gallagher, J. Mackenzie, R. Benham, R-C. Chen, F. Scholer, and J. S. Culpepper. Proc. 13th NTCIR Conf. Evaluation of Information Access Technologies, 2017. pdf
• Efficient Cost-Aware Cascade Ranking in Multi-Stage Retrieval
  R-C. Chen, L. Gallagher, R. Blanco, and J. S. Culpepper. Proc. 40th Int. ACM SIGIR Conf. on Research and Development in Information Retrieval, 2017. pdf

Service

• TOIS, JASIST, Discover Computing (formerly IRJ)
• SIGIR 2019, 2020, 2022, 2023, 2024
• SIGIR-AP 2023, 2024
• WebConf 2022 2023
• WSDM 2022, 2023, 2024
• ECIR 2020, 2024
• ADCS 2018, 2021, 2022
• ReNuIR 2023, 2024
• CIKM 2019, 2020
• NTCIR 2019
• COLING 2022

Teaching Experience

Course coordination and/or lecturer:

• 2023 RMIT University – Programming for Data Science
• 2022 RMIT University – Database Systems

Tutor and/or lab assistant:

• 2019 RMIT University – Information Retrieval; Database Systems
• 2018 RMIT University – Computing Theory; Database Systems; Programming Fundamentals
• 2017 RMIT University – Computing Theory; Discrete Structures; C++ Programming
• 2016 RMIT University – Computing Theory