Bilkent University Web Databases Reseacrh Group
PUBLICATIONS


Journal Publications


  1. S. Yigit-Sert, I. S. Altingovde, Ö. Ulusoy, Diversity-aware strategies for static index pruning, Information Processing and Management (IPM), vol.61, no.5, 2024 (pdf copy)

  2. A. Usta, A. Karakayal¿, Ö. Ulusoy, xDBTagger: Explainable Natural Language Interface to Databases Using Keyword Mappings and Schema Graph, VLDB Journal, vol.33, 2024 (pdf copy)

  3. T. Yilmaz, Ö. Ulusoy, Misinformation Propagation in Online Social Networks: Game Theoretic and Reinforcement Learning Approaches, IEEE Transactions on Computational Social Systems, vol.10, 2023 (pdf copy)

  4. A. Usta, I. S. Altingovde, R. Ozcan, Ö. Ulusoy, Learning to Rank for Educational Search Engines, IEEE Transactions on Learning Technologies, vol.14, no.2, 2021 (pdf copy)

  5. A. Usta, A. Karakayali, Ö. Ulusoy, DBTagger: multi-task learning for keyword mapping in NLIDBs using Bi-directional recurrent neural networks, Proceedings of the VLDB Endowment, vol.14, no.5, 2021 (pdf copy) .

  6. S. Yigit-Sert, I.S. Altingovde, C. Macdonald, I. Ounis, O Ulusoy, Explicit diversification of search results across multiple dimensions for educational search, Journal of the Association for Information Science and Technology, vol.72, no.3, 2021(pdf copy).

  7. S. Yigit-Sert, I.S. Altingovde, C. Macdonald, I. Ounis, O Ulusoy, Supervised approaches for explicit search result diversification, Information Processing and Management, vol.57, no.6, 2020 (pdf copy).

  8. T. Yilmaz, R. Ozcan, I. S. Altingovde, Ö. Ulusoy, Improving educational web search for question-like queries through subject classification, Information Processing and Management (IPM), vol. 56, no. 1, 2019 (pdf copy).

  9. E. Sarigil, I. S. Altingovde, R. Blanco, B. Cambazoglu, R. Ozcan, O. Ulusoy, Characterizing, predicting, and handling web search queries that match very few or no results, Journal of the Association for Information Science and Technology, vol.69, no.2, 2018 (pdf copy).

  10. E. Sarigil, O. Ylmaz, I. S. Altingovde, R. Ozcan, O. Ulusoy, A "Suggested" Picture of Web Search in Turkish, ACM Transactions on Asian and Low-Resource Language Information Processing, vol.15, no.4, Article 24, 2016 (pdf copy).

  11. R. Ozcan, I. S. Altingovde, B. B. Cambazoglu, Ö. Ulusoy, Second Chance: A Hybrid Approach for Dynamic Result Caching and Prefetching in Search Engines, ACM Transactions on the Web, vol. 8, no. 1, December 2013 (pdf copy).

  12. I. S. Altingovde, Ö. N. Subakan, Ö. Ulusoy, Cluster searching strategies for collaborative recommendation systems, Elsevier Information Processing & Management (IPM) journal(IPM), vol. 49, no. 3, May 2013 (pdf copy).

  13. I. S. Altingovde, R. Ozcan, Ö. Ulusoy, Static Index Pruning in Web Search Engines: Combining Term and Document Popularities with Query Views, ACM Transactions on Information Systems (TOIS), vol. 30, no. 1, 2012 (pdf copy).

  14. B. B. Cambazoglu, I. S. Altingovde, R. Ozcan, Ö. Ulusoy, Cache-Based Query Processing for Search Engines, ACM Transactions on the Web (TWEB), vol. 6, no. 4, 2012 (pdf copy).

  15. R. Ozcan, I. S. Altingovde, Ö. Ulusoy, Exploiting navigational queries for result presentation and caching in Web search engines, Journal of the American Society for Information Science and Technology, Volume 62, Issue 4, pages 714-726, April 2011. (pdf copy)

     

  16. R. Ozcan, I. S. Altingovde, B. B. Cambazoglu, F. P. Junqueira, and Ö. Ulusoy, Five-level static cache architecture for web search engines, Information Processing & Management, Volume 48, Issue 5, pages 828-840, Sept 2012. (pdf copy)

     

  17. R. Ozcan, I. S. Altingovde, Ö. Ulusoy. Cost-Aware Strategies for Query Result Caching in Web Search Engines, ACM Transactions on Web, vol. 5, no. 2, 2011 (pdf copy).

     

  18. I. S. Altingovde, E. Demir, F. Can, Ö. Ulusoy, Incremental Cluster-Based Retrieval Using Compressed Cluster-Skipping Inverted Files, ACM Transactions on Information Systems (TOIS), vol.26, no.3, 2008. (pdf copy)

     

  19. I. S. Altingovde, Ö. Ulusoy. Exploiting Interclass Rules for Focused Crawling. IEEE Intelligent Systems, 19, 6 (November-December 2004), 66-73. (pdf copy)

     

  20. G. Ozsoyoglu, I. S. Altingovde, A. Al-Hamdani, S. A. Ozel, Ö. Ulusoy, Z. M. Ozsoyoglu. Querying Web Metadata: Native Score Management and Text Support in Databases. ACM Transactions on Database Systems (TODS), 29, 4 (December 2004), 581-634. (pdf copy)

     

  21. S. A. Ozel, I. S. Altingovde, Ö. Ulusoy, G. Ozsoyoglu, Z. M. Ozsoyoglu, Metadata-Based Modeling of Information Resources on the Web. Journal of the American Society for Information Science and Technology (JASIST), vol. 55, no 2 (January 2004), 97-110. (pdf copy)

International Conference Publications

  1. A. Usta, I. S. Altingovde, B. Vidinli, R. Ozcan, Ö. Ulusoy, Re-finding Behaviour in Educational Search, In Lecture Notes in Computer Science, 23rd International Conference on Theory and Practice of Digital Libraries (TPDL'19), 2019.(pdf copy)

  2. S. Yigit Sert, I. S. Altingovde, O. Ulusoy, Towards detecting media bias by utilizing user comments, ACM Conference on Web Science (WebSci'16), Hannover, Germany, May 2016.(pdf copy)

  3. F. B. Sazoglu, I. S. Altingovde, R. Ozcan, B. B. Cambazoglu, Ö. Ulusoy, Propagating Expiration Decisions in a Search Engine Result Cache,, In Proceedings of 24th International Conference on World Wide Web (WWW'15), 2015. (pdf copy)

  4. A. Usta, I. S. Altingovde, B. Vidinli, R. Ozcan, Ö. Ulusoy, How k-12 students search for learning?: analysis of an educational search engine log,, In Proceedings of 37th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR'14), 2014. (pdf copy)

  5. F. B. Sazoglu, B. B. Cambazoglu, R. Ozcan, I. S. Altingovde, Ö. Ulusoy, A Financial Cost Metric for Result Caching, In Proceedings of 36th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR'13), pp. 873-876, 2013. (pdf copy)

  6. F. B. Sazoglu, B. B. Cambazoglu, R. Ozcan, I. S. Altingovde, Ö. Ulusoy, Strategies for setting time-to-live values in result caches, In Proceedings of the ACM 22nd Conference on Information and Knowledge Management (CIKM'13), pp. 1881-1884, 2013. (pdf copy)

  7. S. Alici, I. S. Altingovde, R. Ozcan, B. B. Cambazoglu, and Ö. Ulusoy, Adaptive Time-to-Live Strategies for Query Result Caching in Web Search Engines, In Proceedings of the 34th European Conference on Information Retrieval (ECIR), pp. 401-412, 2012. (pdf copy)

  8. I. S. Altingovde, R. Blanco, B. B. Cambazoglu, R. Ozcan, E. Sarigil, Ö. Ulusoy, Characterizing Web Search Queries that Match Very Few or No Results, In Proceedings of the ACM 21st Conference on Information and Knowledge Management (CIKM'12), pp. 2000-2004, 2012. (pdf copy)

  9. D. Atilgan, I. S. Altingovde, and Ö. Ulusoy, On the Size of Full Element-Indexes for XML Keyword Search, Proceedings of the 34th European Conference on Information Retrieval (ECIR), 2012. (pdf copy)

  10. R. Ozcan, I. S. Altingovde, and Ö. Ulusoy, In Praise of Laziness: A Lazy Strategy for Web Information Extraction, Proceedings of the 34th European Conference on Information Retrieval (ECIR), pp. 565-568, 2012. (pdf copy)

  11. S. Alici, I. S. Altingovde, R. Ozcan, B. B. Cambazoglu, and Ö. Ulusoy, Timestamp-based Result Cache Invalidation for Web Search Engines, In Proceedings of SIGIR 2011, pp. 973-982. (pdf copy)

  12. S. Alici, I. S. Altingovde, R. Ozcan, B. B. Cambazoglu, and Ö. Ulusoy, Timestamp-based Cache Invalidation for Search Engines, WWW 2011, pp. 3-4. (pdf copy)

     

  13. I. S. Altingovde, R. Ozcan, B. B. Cambazoglu, and Ö. Ulusoy, Second Chance: A Hybrid Approach for Dynamic Result Caching in Search Engines, Proceedings of the 33rd European Conference on Information Retrieval (ECIR), pp. 510-516. (pdf copy)

     

  14. I. S. Altingovde, D. Atilgan, Ö. Ulusoy, XML Retrieval using Pruned Element-Index Files, Proceedings of the 32nd European Conference on Information Retrieval (ECIR), pp. 306–318, Milton Keynes, UK, March 2010. (pdf copy)

     

  15. I. S. Altingovde, D. Atilgan, Ö. Ulusoy, Exploiting Index Pruning Methods for Clustering XML Collections, Proceedings of the 8th International Workshop of the Initiative for the Evaluation of XML Retrieval (INEX), pp. 379–386, Brisbane, Australia, December 2009. (pdf copy)

     

  16. I. S. Altingovde, R. Ozcan, Ö. Ulusoy, Exploiting Query Views for Static Index Pruning in Web Search Engines, Proceedings of the 18th ACM Conference on Information and Knowledge Management (CIKM), pp. 1951–1954, HK, China, November 2009. (pdf copy)

     

  17. I. S. Altingovde, R. Ozcan, Ö. Ulusoy, A Practitioner’s Guide for Static Index Pruning, Proceedings of the 31st European Conference on Information Retrieval (ECIR), pp.675–679, Toulouse, France, April 2009. (Best Poster Award) (pdf copy)

     

  18. I. S. Altingovde, R. Ozcan, Ö. Ulusoy, A Cost-Aware Strategy for Query Result Caching in Web Search Engines, Proceedings of the 31st European Conference on Information Retrieval (ECIR), pp. 628–636, Toulouse, France, April 2009.  (pdf copy)

     

  19. R. Ozcan, I. S. Altingovde, Ö. Ulusoy, Utilization of Navigational Queries for Result Presentation and Caching in Search Engines, ACM 17th Conference on Information and Knowledge Management (CIKM'08), Napa Valley, California, USA, October 2008.(pdf copy)

     

  20. R. Ozcan, I. S. Altingovde, Ö. Ulusoy, Space efficient caching of query results in search engines, International Symposium on Computer and Information Sciences (ISCIS'08), Istanbul, Turkey, October 2008. (pdf copy)

     

  21. I. S. Altingovde, E. Demir, F. Can, Ö. Ulusoy, Site-based Dynamic Pruning for Query Processing in Search Engines, 31st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR'08), Singapore, 2008. (pdf copy)

     

  22. I. S. Altingovde, F. Can, Ö. Ulusoy, Efficient Processing of Category-Restricted Queries for Web Directories, 30th European Conference on Information Retrieval (ECIR'08),  Lecture Notes in Computer Science (Springer Verlag), vol.4956, 2008.(pdf copy)

     

  23. R. Özcan, I. S. Altingovde, Ö. Ulusoy, Static Query Result Caching Revisited, 17th International Conference on World Wide Web (WWW'08), Beijing, China, 2008. (pdf copy)

     

  24. I. S. Altingövde, R. Ozcan, S. Cetintas, H.Yilmaz, Ö. Ulusoy, An Automatic Approach to Construct Domain-Specific Web Portals, ACM 16th Conference on Information and Knowledge Management (CIKM’07), Lisbon, Portugal, November 2007.(pdf copy) 

     

  25. I. S. Altingovde, R. Ozcan, H.C. Ocalan, F. Can, Ö. Ulusoy, Large-Scale Cluster-Based Retrieval Experiments on Turkish Texts, 30th Annual International ACM SIGIR Conference on Research and Development in Information Retrieval (SIGIR'07), Amsterdam, The Netherlands, July 2007. (pdf copy)

     

  26. I. S. Altingovde, F. Can, Ö. Ulusoy, Algorithms for Within-Cluster Searches Using Inverted Files, International Symposium on Computer and Information Sciences (ISCIS'06), Lecture Notes in Computer Science (Springer Verlag), vol.4263, 2006. (pdf copy)

     

  27. G. Ozsoyoglu, Abdullah Al-Hamdani, I. S. Altingovde, S. A. Ozel, Ö. Ulusoy, Z. M. Ozsoyoglu, Sideway Value Algebra for Object-Relational Databases, International Conference on Very Large Databases (VLDB'02), Hong Kong, August 2002. (pdf copy)

     

  28. I. S. Altingovde, S. A. Ozel, Ö. Ulusoy, G. Ozsoyoglu, Z. M. Ozsoyoglu, Topic-Centric Querying of Web Information Resources, Database and Expert Systems Applications (DEXA'01), Lecture Notes in Computer Science (Springer Verlag), vol.2113, September 2001. (ps copy)

     

Theses

  1. Tolga Yilmaz, Ph.D Thesis, Bilkent University, Towards Modeling and Mitigating Misinformation Propagation in Online Social Networks, Ankara, Turkey, January 2023.

  2. Mousa F. Azari, M.S. Thesis, Bilkent University, TranSQLate: Translating Enriched Natural Language Sentences to SQL Queries Using Transformers, Ankara, Turkey, September 2022.

  3. Akifhan Karakayali, M.S. Thesis, Bilkent University, Effective and Explainable Mechanisms for Natural Language Interface in Databases, Ankara, Turkey, September 2021.

  4. Arif Usta, Ph.D Thesis, Bilkent University, Towards Deeply Intelligent Interfaces in Relational Databases, Ankara, Turkey, August 2021.

  5. Sevgi Yigit Sert, Ph.D Thesis, Middle East Technical University, Advanced Methods for Diversification of Results in General-Purpose and Specialized Search Engines, Ankara, Turkey, December 2020.

  6. Tolga Yilmaz, M.S. Thesis, Bilkent University, Improving Educational Search and Question Answering, Ankara, Turkey, June 2016.

  7. Arif Usta, M.S. Thesis, Bilkent University, Optimization of an Educational Search Engine using Learning to Rank Algorithms, Ankara, Turkey, September 2015.

  8. Fethi Burak Sazoglu, M.S. Thesis, Bilkent University, Efficient Result Caching Mechanisms in Search Engines, Ankara, Turkey, September 2014.

  9. Erdem Sarigil, M.S. Thesis, Bilkent University, Analysis of Web Search Queries with Very Few or No Results , Ankara, Turkey, September 2012.

  10. Oguz Yilmaz, M.S. Thesis, Bilkent University, Longitudinal Analysis of Search Engine Query Logs - Temporal Coverage , Ankara, Turkey, September 2012.

  11. Sadiye Alici, M.S. Thesis, Bilkent University, A Result Cache Invalidation Scheme for Web Search Engines, Ankara, Turkey, October 2011.

  12. Rifat Ozcan, Caching Techniques for Large Scale Web Search Engines, Ph.D. Thesis, Bilkent University, Ankara, Turkey, September 2011.

  13. Duygu Atilgan, Efficiency and Effectiveness of XML Keyword Search Using a Full Element-Index, M.S. Thesis, Bilkent University, Ankara, Turkey, August 2010.

  14. I. S. Altingovde, Improving the Efficiency of Search Engines: Strategiew for Focused Crawling, Searching, and Index Pruning, Ph.D. Thesis, Bilkent University, Ankara, Turkey, July 2009.

  15. Ozlem Nurcan Subakan, Cluster-Based Collaborative Filtering with Inverted Indexing, M.S. Thesis, Bilkent University, Ankara, Turkey, August 2005.

     

  16. Selma Ayse Ozel, Metadata-Based and Personalized Web Querying, Ph.D. Thesis, Bilkent University, Ankara, Turkey, January 2004.

     

  17. Mustafa Kutluturk, Implementation of a Topic Map Data Model for a Web-Based Information Resource, M.S. Thesis, Bilkent University, Ankara, Turkey, August 2002.

     

  18. I. S. Altingovde, Topic-Centric Querying of Web Resources, M.S. Thesis, Bilkent University, Ankara, Turkey, September 2001.