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This is the academic homepage of Erik Velldal, associate professor in the Language Technology Group (LTG) at the University of Oslo, Department of Informatics. (Looking for my sailing blog? Then this is the place; sailingkajsa.net.)

 

Publications

 

Journal articles

Erik Velldal, Lilja Øvrelid, Jonathon Read and Stephan Oepen
Speculation and negation: Rules, rankers, and the role of syntax
Computational Linguistics, Vol. 38, No. 2, Pages 369-410
(Special Issue on Modality and Negation, edited by Roser Morante and Caroline Sporleder)
MIT Press, 2012
[journal | .bib | supplemental materials]

Jonathon Read, Erik Velldal and Lilja Øvrelid
Topic classification for suicidology
Journal of Computing Science and Engineering (JCSE), Vol. 6, No. 2, Pages 143-150
Korean Institute of Information Scientists and Engineers, 2012
[journal | .bib]

Jonathon Read, Erik Velldal and Lilja Øvrelid
Labeling emotions in suicide notes: Cost-sensitive learning with heterogeneous features
Biomedical Informatics Insights, Vol. 5, Suppl. 1, Pages 99-103
Libertas Academica, 2012
[journal | .bib]

Francis Bond, Stephan Oepen, Eric Nichols, Dan Flickinger, Erik Velldal and Petter Haugereid
Deep open-source machine translation
Machine Translation, Vol. 25, Issue 2, Pages 87-105
Springer, Netherlands, 2011
[journal.bib]

Erik Velldal
Predicting speculation: A simple disambiguation approach to hedge detection in biomedical literature
Journal of Biomedical Semantics, Vol. 2, Suppl. 5, BioMed Central, October 2011
[journal.bib]

 

Conference proceedings

Andrey Kutuzov, Erik Velldal and Lilja Øvrelid
Temporal dynamics of semantic relations in word embeddings:
an application to predicting armed conflict participants

Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing
Copenhagen, Denmark, 2017
[to appear]

Andrey Kutuzov, Erik Velldal and Lilja Øvrelid
Tracing armed conflicts with diachronic word embedding models
Tracing armed conflicts with diachronic word embedding models
Proceedings of the ACL workshop Events and Stories in the News
Vancouver, Canada, 2017
[to appear]

Erik Velldal, Lilja Øvrelid and Petter Hohle
Joint UD Parsing of Norwegian Bokmål and Nynorsk
Proceedings of the 21st Nordic Conference of Computational Linguistics (Nodalida)
Gothenburg, Sweden, 2017 (Best Paper Award)
[.pdf | .bib | git]

Murhaf Fares, Andrey Kutuzov, Stephan Oepen and Erik Velldal
Word vectors, reuse, and replicability: Towards a community repository of large-text resources
Proceedings of the 21st Nordic Conference of Computational Linguistics (Nodalida)
Gothenburg, Sweden, 2017
[.pdf | .bib]

Martine Enger, Erik Velldal and Lilja Øvrelid
An open-source tool for negation detection: a maximum-margin approach
Proceedings of the EACL workshop on Computational Semantics Beyond Events and Roles (SemBEaR)
Valencia, Spain 2017
[.pdf | .bib | git]

Richard Eckart de Castilho, Nancy Ide, Emanuele Lapponi, Stephan Oepen, Keith Suderman, Erik Velldal and Marc Verhagen
Representation and Interchange of Linguistic Annotation: An In-Depth, Side by-Side Comparison of Three Designs
Proceedings of the 11th Linguistic Annotation Workshop (LAW)
Valencia, Spain, 2017
[.pdf | .bib]

Petter Hohle, Lilja Øvrelid and Erik Velldal
Optimizing a PoS Tagset for Norwegian Dependency Parsing
Proceedings of the 21st Nordic Conference of Computational Linguistics (Nodalida)
Gothenburg, Sweden, 2017
[.pdf | .bib | git]

Heidi Sand, Erik Velldal and Lilja Øvrelid
Wordnet extension via word embeddings: Experiments on the Norwegian Wordnet
Proceedings of the 21st Nordic Conference of Computational Linguistics (Nodalida)
Gothenburg, Sweden, 2017
[.pdf | .bib]

Andrey Kutuzov, Erik Velldal and Lilja Øvrelid
Redefining part-of-speech classes with distributional semantic models
Proceedings of the 20th Conference on Computational Natural Language Learning
Berlin, Germany, 2016
[.pdf | .bib]

Stephan Oepen, Jonathon Read, Tatjana Scheffler, Uladzimir Sidarenka, Manfred Stede, Erik Velldal and Lilja Øvrelid
OPT: Oslo–Potsdam–Teesside. Pipelining rules, rankers, and classifier ensembles for shallow discourse parsing
Proceedings of the SIGNLL Conference on Computational Natural Language Learning: Shared Task
Berlin, Germany, 2016 (Best system overall, shared task)
[.pdf | .bib]

Aksel Wester, Lilja Øvrelid, Erik Velldal and Hugo Lewi Hammer
Threat detection in online discussions
Proceedings of the 7th Workshop on Computational Approaches to Subjectivity, Sentiment & Social Media Analysis (WASSA)
San Diego, USA, 2016
[.pdf | .bib]

Jonathon Read, Erik Velldal, Marc Cavazza and Gersende Georg
A corpus of clinical practice guidelines annotated with the importance of recommendations
10th edition of the Language Resources and Evaluation Conference (LREC)
Portorož, Slovenia, 2016
[.pdf | .bib]

Murhaf Fares, Stephan Oepen and Erik Velldal
Identifying compounds: On the role of syntax
Proceedings of the 14th International Workshop on Treebanks and Linguistic Theories (TLT)
Warsaw, Poland, 2015
[.pdf | .bib]

Emanuele Lapponi, Stephan Oepen, Arne Skjærholt and Erik Velldal
LAP: The CLARINO Language Analysis Portal
Proceedings of the CLARIN Annual Conference 2015
Wroclaw, Poland, 2015
[.pdf | .bib]

Jostein Lien, Erik Velldal and Lilja Øvrelid
Improving cross-domain dependency parsing with dependency-derived clusters
Proceedings of the 20th Nordic Conference of Computational Linguistics (Nodalida)
Vilnius, Lithuania, 2015
[.pdf | .bib]

Bjørn Høyland, Jean-François Godbout, Emanuele Lapponi and Erik Velldal
Predicting party affiliations from European Parliament debates
Proceedings of the Workshop on Language Technologies and Computational Social Science (ACL)
Baltimore, USA, 2014
[.pdf | .bib]

Emanuele Lapponi, Erik Velldal, Stephan Oepen and Rune Lain Knudsen
Off-road LAF: Encoding and processing annotations in NLP workflows
Proceedings of the 9th edition of the Language Resources and Evaluation Conference (LREC)
Reykjavik, Iceland, 2014
[.pdf | .bib]

Emanuele Lapponi, Erik Velldal, Nikolay A. Vazov and Stephan Oepen
Towards large-scale language analysis in the cloud
Proceedings of the workshop on Nordic Language Research Infrastructure
Oslo, Norway, 2013
[.pdf | .bib]

Emanuele Lapponi, Erik Velldal, Nikolay A. Vazov and Stephan Oepen
HPC-ready language analysis for human beings
Proceedings of the 19th Nordic Conference of Computational Linguistics (Nodalida)
Oslo, Norway, 2013
[.pdf | .bib]

Erik Velldal and Jonathon Read
Factuality Detection on the Cheap: Inferring Factuality for Increased Precision in Detecting Negated Events
Proceedings of the ACL 2012 workshop on Extra-Propositional Aspects of Meaning in Computational Linguistics
Jeju Island, Korea, 2012
[.pdf | .bib]

Jonathon Read, Erik Velldal, Lilja Øvrelid and Stephan Oepen
UiO1: Constituent-Based Discriminative Ranking for Negation Resolution
Proceedings of the First Joint Conference on Lexical and Computational Semantics (*SEM)
Montreal, 2012 (Best system, shared task closed track)
[.pdf | .bib]

Emanuele Lapponi, Erik Velldal, Lilja Øvrelid and Jonathon Read
UiO2: Sequence-Labeling Negation Using Dependency Features
Proceedings of the First Joint Conference on Lexical and Computational Semantics (*SEM)
Montreal, 2012 (Best system, shared task open track)
[.pdf | .bib]

Jonathon Read, Erik Velldal, Stephan Oepen and Lilja Øvrelid
Resolving Speculation and Negation Scope in Biomedical Articles with a Syntactic Constituent Ranker
Proceedings of the Fourth International Symposium on Languages in Biology and Medicine
Singapore, 2011 (Best Paper Award)
[.pdf | .bib]

Jonathon Read and Erik Velldal and Lilja Øvrelid
Topic Classification for Suicidology
Proceedings of the Fourth International Symposium on Languages in Biology and Medicine
Singapore, 2011
[.pdf | .bib]

Erik Velldal
Random Indexing Re-Hashed
Proceedings of the The 18th Nordic Conference of Computational Linguistics
Riga, Latvia, 2011
[.pdf | .ps | .bib | slides]

Erik Velldal
Detecting Uncertainty in Biomedical Literature: A Simple Disambiguation Approach Using Sparse Random Indexing
Proceedings of the Fourth International Symposium on Semantic Mining in Biomedicine (SMBM)
Cambridgeshire, UK, 2010
[.pdf | .ps | .bib]

Lilja Øvrelid, Erik Velldal, and Stephan Oepen
Syntactic Scope Resolution in Uncertainty Analysis
Proceedings of the 23rd International Conference on Computational Linguistics (COLING)
Beijing, China, 2010
[.pdf | .bib]

Erik Velldal, Lilja Øvrelid and Stephan Oepen
Resolving Speculation: MaxEnt Cue Classification and Dependency-Based Scope Rules
Proceedings of the Shared Task of the 14th Conference on Computational Natural Language Learning (CoNLL)
Uppsala, Sweden, 2010
[.pdf | .ps | .bib]

S. Oepen, E. Velldal, J.T. Lønning, P. Meurer, V Rosén, and D. Flickinger
Towards Hybrid Quality-Oriented Machine Translation — On Linguistics and Probabilities in MT
In Proceedings of the 11th Conference on Theoretical and Methodological Issues in Machine Translation (TMI),
Skövde, Sweden, 2007
[.pdf | .bib]

E. Velldal and S. Oepen
Statistical Ranking in Tactical Generation
In Proceedings of the 2006 Conference on Empirical Methods in Natural Language Processing (EMNLP),
Sydney, Australia, 2006
[.pdf | .ps | .bib]

E. Velldal and S. Oepen
Maximum Entropy Models for Realization Ranking
In Proceedings of the 10th MT-Summit (X),
Phuket, Thailand, 2005
[.pdf | .ps | .bib | slides]

E. Velldal
A Fuzzy Clustering Approach to Word Sense Discrimination
In Proceedings of the 7th International conference on Terminology and Knowledge Engineering,
Copenhagen, Denmark, 2005
[.pdf | .ps | .doc | .bib]

E. Velldal, S. Oepen, and D. Flickinger
Paraphrasing Treebanks for Stochastic Realization Ranking

In Proceedings of the 3rd Workshop on Treebanks and Linguistic Theories (TLT,
Tübingen, Germany, 2004
[.pdf | .ps | .bib]

S. Oepen, H. Dyvik, J. T. Lønning, E. Velldal, D. Beermann, J. Carroll, D. Flickinger, L. Hellan, J. B. Johannessen, P. Meurer, T. Nordgård, and V. Rosén
Som å kapp-ete med trollet? Towards MRS-based Norwegian–English Machine Translation
In Proceedings of the 10th International Conference on Theoretical and Methodological Issues in Machine Translation,
Baltimore, MD, 2004
[.pdf | .bib]

J. T. Lønning, S. Oepen, D. Beermann, L. Hellan, J. Carroll, H. Dyvik, D. Flickinger, J. B. Johannessen, P. Meurer, T. Nordgård, V. Rosén, and E. Velldal
LOGON. A Norwegian MT effort
In Proceedings of the Workshop in Recent Advances in Scandinavian Machine Translation,
Uppsala, Sweden, 2004
[.pdf | .bib]

 

Theses

E. Velldal
Empirical Realization Ranking
Ph.D. thesis, Department of Informatics, University of Oslo
Oslo, Norway, 2008
[.pdf | .ps.gz | .bib]

E. Velldal
Modeling Word Senses with Fuzzy Clustering
Cand.Philol. Thesis in the program Language, Logic and Information (SLI),
University of Oslo, 2003
[.pdf | .ps.gz | .bib]

 
Search for publications or citations in Google Scholar.

 

Teaching

2015 (F): INF4820 — Algorithms for Artificial Intelligence and Natural Language Processing

2015 (S): INF2810 — Functional Programming

2014 (S): INF2810 — Functional Programming

2013 (F): INF4820 — Algorithms for Artificial Intelligence and Natural Language Processing

2013 (S): INF2810 — Functional Programming

2012 (F): INF4820 — Algorithms for Artificial Intelligence and Natural Language Processing

2012 (S,F): INF5800 — Master Seminar in Language Technology

2011 (S,F): INF5800 — Master Seminar in Language Technology

2009 (F): INF4820 — Algorithms for Artificial Intelligence and Natural Language Processing

2008 (S): ITSLP1100 — Introduction to Cognitive Sciences

 

Code

SPARTAN
Shallow PARsing of TAgged Norwegian Nouns, –a package of Perl scripts for extracting dependency relations from text.
Download: spartan.tgz