The University of Sheffield
Department of Computer Science

Leon Derczynski

Pronounced "der-CHIN-ski"

Research interests

Contact

I prefer email: leon@dcs.shef.ac.uk

You may also find me on Twitter: @LeonDerczynski.

My Academic CV.

By post:
Dr. Leon Derczynski
Department of Computer Science
211 Portobello
Sheffield
S1 4DP
United Kingdom

Leon Derczynski

News

Talks

September 2015
June 2015
May 2015
January 2015

Current projects

References

    2015
  1. Leon Derczynski, Diana Maynard, Giuseppe Rizzo, Marieke van Erp, Genevieve Gorrell, Raphaël Troncy, Johann Petrak, Kalina Bontcheva. 2015. Analysis of Named Entity Recognition and Linking for Tweets.
    - in Information Processing and Management (IPM). [data]
  2. Steven Bethard, Leon Derczynski, Guergana Savova, James Pustejovsky, Marc Verhagen. 2015. SemEval-2015 Task 6: Clinical TempEval.
    - in Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015).
  3. Fatih Uzdilli, Martin Jaggi, Dominic Egger, Pascal Julmy, Leon Derczynski, Mark Cieliebak. 2015. Swiss-Chocolate: Combining Flipout Regularization and Random Forest with Artificially Built Subsystems to Boost Text-Classification for Sentiment.
    - in Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015).
  4. Hegler Tissot, Genevieve Gorrell, Angus Roberts, Leon Derczynski, Marcos Didonet del Fabro. 2015. UFPRSheffield: Contrasting Rule-based and Support Vector Machine Approaches to Time Expression Identification in Clinical TempEval.
    - in Proceedings of the 9th International Workshop on Semantic Evaluation (SemEval 2015).
  5. Kalina Bontcheva, Leon Derczynski, Ian Roberts. 2015. Crowdsourcing Named Entity Recognition and Entity Linking Corpora.
    - In Nancy Ide and James Pustejovsky, eds.: The Handbook of Linguistic Annotation.
  6. Hegler Tissot, Angus Roberts, Leon Derczynski, Genevieve Gorrell, Marcos Didonet del Fabro. 2015. Analysis of Temporal Expressions Annotated in Clinical Notes.
    - in Proceedings of the 11th Joint ACL-ISO Workshop on Interoperable Semantic Annotation (ISA-11).
  7. Leon Derczynski, Jannik Strötgen, Ricardo Campos, Omar Alonso. 2015. Time and Information Retrieval: Introduction to the Special Issue.
    - in Information Processing and Management (IPM).
  8. Martin Leginus, Leon Derczynski, Peter Dolog. 2015. Enhanced Information Access to Social Streams through Word Clouds with Entity Grouping.
    - in Proceedings of the 11th International Conference on Web Information Systems and Technologies (WEBIST) (full paper, acceptance rate 14%). Winner of Best Student Paper award.
  9. Leon Derczynski, Kalina Bontcheva, Michal Lukasik, Thierry Declerck, Arno Scharl, Georgi Georgiev, Petya Osenova, Tomas Pariente Lobo, Anna Kolliakou, Robert Stewart, Sara-Jayne Terp, Geraldine Wong, Christian Burger, Arkaitz Zubiaga, Rob Procter and Maria Liakata. 2015. PHEME: Computing Veracity --- the Fourth Challenge of Big Social Data.
    - in Proceedings of the ESWC EU Project Networking Session.
  10. Leon Derczynski, Isabelle Augenstein, Kalina Bontcheva. 2015. USFD: Twitter NER with Drift Compensation and Linked Data.
    - in Proceedings of the Workshop on Noisy User-generated Text (W-NUT).
  11. Leon Derczynski, Sean Chester, Kenneth S. Bøgh. 2015. Tune Your Brown Clustering, Please.
    - in Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2015). [Brown clustering hyperparameter tutorial] [poster]
  12. Leon Derczynski, Robert Gaizauskas. 2015. Temporal Relation Classification using a Model of Tense and Aspect.
    - in Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2015).
  13. Leon Derczynski, Kalina Bontcheva. 2015. Efficient named entity annotation through pre-empting.
    - in Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2015).
  14. Martin Leginus, Leon Derczynski, Peter Dolog. 2015. Entity Grouping for Accessing Social Streams via Word Clouds.
    - to appear in Lecture Notes in Business Information Processing
  15. Diana Maynard, Ian Roberts, Mark A Greenwood, Leon Derczynski, Kalina Bontcheva. 2015. Political Futures Tracker: Technical report.
    - Nesta working paper 15/12.
  16. 2014
  17. Leon Derczynski. 2014. Social Media: A Microscope for Public Discourse.
    - in Studies in the Digital Humanities.
  18. Leon Derczynski, Kalina Bontcheva. 2014. Pheme: Veracity in Digital Social Networks.
    - in Proceedings of the UMAP Project Synergy workshop (UMAPProS 2014).
  19. Steven Bethard, Leon Derczynski, James Pustejovsky, Marc Verhagen. 2014. Clinical TempEval.
    - CoRR arXiv 1403.4928.
  20. Leon Derczynski, Kalina Bontcheva. 2014. Spatio-temporal grounding of claims made on the web, in Pheme.
    - in Proceedings of the 10th Joint ACL - ISO Workshop on Interoperable Semantic Annotation (ISA 10).
  21. Leon Derczynski, Kalina Bontcheva. 2014. Passive-Aggressive Sequence Labeling with Discriminative Post-Editing for Recognising Person Entities in Tweets.
    - In Proceedings of the 14th Conference of the European Chapter of the Association for Computational Linguistics (EACL 2014) (short, acceptance rate 23.1%). [slides] [video]
  22. Leon Derczynski, C. V. Field, Kenneth S. Bøgh. 2014. DKIE: Open Source Information Extraction for Danish.
    - In Proceedings of the 14th Conference of the European Chapter of the Association for Computational Linguistics (EACL 2014) (demo).
  23. Kalina Bontcheva, Ian Roberts, Leon Derczynski, Dominic Rout. 2014. The GATE Crowdsourcing Plugin: Crowdsourcing Annotated Corpora Made Easy.
    - In Proceedings of the 14th Conference of the European Chapter of the Association for Computational Linguistics (EACL 2014) (demo). [docs] [code in GATE]
  24. Marta Sabou, Kalina Bontcheva, Leon Derczynski, Arno Scharl. 2014. Corpus Annotation through Crowdsourcing: Towards Best Practice Guidelines.
    - In Proceedings of the 9th Conference on International Language Resources and Evaluation (LREC 2014). [slides] [video]
  25. 2013
  26. Leon Derczynski, Robert Gaizauskas. 2013. Information Retrieval for Temporal Bounding.
    - In Proceedings of the 4th International Conference on the Theory of Information Retrieval (ICTIR 2013) (acceptance rate 22%). [poster] [bib]
  27. Matteo Brucato, Leon Derczynski, Hector Llorens, Kalina Bontcheva, Christian S. Jensen. 2013. Recognising and Interpreting Named Temporal Expressions.
    - In Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2013) (long, acceptance rate 11.8%). [slides]
  28. Kalina Bontcheva, Leon Derczynski, Adam Funk, Mark A. Greenwood, Diana Maynard, Niraj Aswani. 2013. TwitIE: An Open-Source Information Extraction Pipeline for Microblog Text.
    - In Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2013) (long, acceptance rate 11.8%). [code] [slides]
  29. Leon Derczynski, Alan Ritter, Sam Clark, Kalina Bontcheva. 2013. Twitter Part-of-Speech Tagging for All: Overcoming Sparse and Noisy Data.
    - In Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2013) (long, acceptance rate 11.8%). [code] [slides]
  30. Leon Derczynski, Robert Gaizauskas. 2013. Temporal Signals Help Label Temporal Relations.
    - In Proceedings of the 51st meeting of the Association for Computational Linguistics (ACL 2013) (short, acceptance rate 24%). [bib] [poster]
  31. Leon Derczynski, Kalina Bontcheva. 2013. Mining Social Media with Linked Open Data, Entity Recognition, and Event Extraction.
    - In Proceedings of the 3rd Workshop on Data Extraction and Object Search (DEOS 2013). [slides]
  32. Naushad UzZaman, Hector Llorens, Leon Derczynski, James Allen, Marc Verhagen, James Pustejovsky. 2013. SemEval-2013 Task 1: TempEval-3: Evaluating Events, Time Expressions, and Temporal Relations.
    - In Proceedings of the 7th International Workshop on Semantic Evaluation (SemEval 2013). [slides] [bib]
  33. Leon Derczynski. 2013. Determining the Types of Temporal Relations in Discourse.
    - In PhD theses: Department of Computer Science, University of Sheffield, UK. [bib] [slides]
  34. Leon Derczynski, Diana Maynard, Niraj Aswani, Kalina Bontcheva. 2013. Microblog-Genre Noise and Impact on Semantic Annotation Accuracy.
    - In Proceedings of the 24th ACM Conference on Hypertext and Social Media (HT 2013) (acceptance rate 16.7%). Shortlisted for SIGWEB Ted Nelson award. [slides] [bib]
  35. Leon Derczynski, Hector Llorens, Naushad UzZaman. 2013. TimeML-strict: clarifying temporal annotation.
    - CoRR arXiv:1304.7289 [bib]
  36. Leon Derczynski, Robert Gaizauskas. 2013. Empirical Validation of Reichenbach's Tense Framework.
    - In Proceedings of the 10th Conference on Computational Semantics (IWCS 2013). [slides] [bib] (Kevin Knight remembered this talk for its distinctiveness when we met four months after I gave it, pretty cool huh!)
  37. Leon Derczynski, Bin Yang, Christian S. Jensen. 2013. Towards Context-Aware Search and Analysis on Social Media Data.
    - In Proceedings of the 16th Conference on Extending Database Technology (EDBT 2013) (track acceptance rate 13.6%). [slides] [bib]
  38. 2012
  39. Naushad UzZaman, Hector Llorens, James Allen, Leon Derczynski, Marc Verhagen, James Pustejovsky. 2012. TempEval-3: Evaluating Events, Time Expressions, and Temporal Relations.
    - CoRR arXiv:1206.5333v1 [bib]
  40. Robert Gaizauskas, Emma Barker, Ching-Lan Chang, Leon Derczynski, Michael Phiri, Chengzhi Peng. 2012. Applying ISO-Space to Healthcare Facility Design Evaluation Reports.
    - In Proceedings of the 7th Joint ISO-ACL Workshop on Interoperable Semantic Annotation (ISA 7). [bib]
  41. Leon Derczynski, Hector Llorens, Estela Saquete. 2012. Massively Increasing TIMEX3 Resources: A Transduction Approach.
    - In Proceedings of the 8th Conference on International Language Resources and Evaluation (LREC 2012). [code] [poster] [bib]
  42. Hector Llorens, Leon Derczynski, Robert Gaizauskas, Estela Saquete. 2012. TIMEN: An Open Temporal Expression Normalization Resource.
    - In Proceedings of the 8th Conference on International Language Resources and Evaluation (LREC 2012). [code] [slides] [bib]
  43. 2011
  44. Amev Burman, Arun Jayapal, Sathish Kannan, Madhu Kavilikatta, Ayman Alhelbawy, Leon Derczynski, Robert Gaizauskas. 2011. USFD at KBP 2011: Entity Linking, Slot Filling and Temporal Bounding.
    - In Proceedings of the 4th Text Analysis Conference (TAC 2011). [bib]
  45. Leon Derczynski, Robert Gaizauskas. 2011. A Corpus-based Study of Temporal Signals.
    - In Proceedings of the 6th Corpus Linguistics Conference (CL 2011). [slides] [bib]
  46. Leon Derczynski, Robert Gaizauskas. 2011. An Annotation Scheme for Reichenbach's Verbal Tense Structure.
    - In Proceedings of the 6th Joint ACL - ISO Workshop on Interoperable Semantic Annotation (ISA 6). [slides] [bib]
  47. 2010
  48. Leon Derczynski, Robert Gaizauskas. 2010. Using Signals to Improve Automatic Classification of Temporal Relations.
    - In Proceedings of the 15th ESSLLI StuS session. [slides] [bib]
  49. Leon Derczynski, Robert Gaizauskas. 2010. USFD2: Annotating Temporal Expresions and TLINKs for TempEval-2.
    - In Proceedings of the 5th Workshop on Semantic Evaluations (TempEval-2), ACL. [code] [bib] [poster]
  50. Leon Derczynski, Robert Gaizauskas. 2010. Analysing Temporally Annotated Corpora with CAVaT.
    - In Proceedings of the 7th Conference on International Language Resources and Evaluation (LREC 2010). [code] [bib]
  51. 2008
  52. Leon Derczynski, Mark A Greenwood, Robert Gaizauskas, Jun Wang. 2008. A data driven approach to query expansion in question answering.
    - In Coling 2008: Proceedings of the 2nd workshop on Information Retrieval for Question Answering (IR4QA 2). [slides] [bib]
  53. Leon Derczynski, Jun Wang, Ben Solway, Richard Shaw. 2008. Question Answering Against Very Large Text Collections.
    - Project Report, in Department of Computer Science, University of Sheffield - Masters' Theses.
  54. 2006
  55. Leon Derczynski, supervised by Amanda Sharkey. 2006. Machine learning techniques for document selection.
    - In Department of Computer Science, University of Sheffield - dissertations. [poster] [bib]

Awards and Grants

Resources

Past projects

Related links

Quotes

"The illiterate of the 21st century will not be those who cannot read and write, but those who cannot learn, unlearn, and relearn." -- Alvin Toffler
"All models are wrong, but some are useful." -- George Box
"Peer review is boosting with three weak learners. Apply salt liberally." -- LD
"Human knowledge is expressed in language. So computational linguistics is very important." -- Mark Steedman

Personal

The University of Sheffield
Western Bank
Sheffield S10 2TN
UK