Erik Velldal

Bilde av Erik Velldal
English version of this page
Telefon +47-22840119
Rom 7461
Brukernavn
Besøksadresse Gaustadalléen 23B Ole-Johan Dahls hus 0373 OSLO
Postadresse Postboks 1080 Blindern 0316 OSLO

Faglige interesser

Språkteknologiske anvendelser av maskinlæring.

Undervisning

Har siden 2008 undervist i bl.a. følgende kurs ved IFI:

Bakgrunn

Er ansatt som førsteamanuensis ved språkteknologigruppen (LTG) ved IFI. Arbeider primært med maskinlæring og statistiske tilnærminger til behandling av naturlige språk. Leder for øyeblikket SANT-prosjektet som fokuserer på sentimentanalyse. Fullførte doktorgraden tilknyttet LOGON-prosjektet i 2008, med en avhandling som fokuserte på bruk av empiriske metoder for engelsk språkgenerering (for anvendelse i f.eks maskinoversettelse; se kort sammendrag på forskning.no). Har hovedfag fra studieprogrammet Språk, Logikk og Informasjon, en forløper til dagens språkteknologi-program ved IFI.

Personlig Hjemmeside

sailingkajsa.net og velldal.net/erik/.

Emneord: nlp, språkteknologi, språkprosessering, datalingvistikk, maskinlæring, kunstig intelligens, AI, Machine Learning

Publikasjoner

  • Barnes, Jeremy Claude; Velldal, Erik & Øvrelid, Lilja (2020). Improving Sentiment Analysis with Multi-task Learning of Negation. Natural Language Engineering.  ISSN 1351-3249. Vis sammendrag
  • Barnes, Jeremy Claude; Touileb, Samia; Øvrelid, Lilja & Velldal, Erik (2019). Lexicon information in neural sentiment analysis: a multi-task learning approach, In Mareike Hartmann & Barbara Plank (ed.),  Proceedings of the 22nd Nordic Conference on Computational Linguistics (NoDaLiDa).  Linköping University Electronic Press.  ISBN 978-91-7929-995-8.  Artikkel.  s 175 - 186 Vis sammendrag
  • Barnes, Jeremy Claude; Øvrelid, Lilja & Velldal, Erik (2019). Sentiment analysis is not solved! Assessing and probing sentiment classification, In  Proceedings of the 2nd BlackboxNLP Workshop on Analyzing and Interpreting Neural Networks for NLP.  Association for Computational Linguistics.  ISBN 978-1-950737-30-7.  article.  s 12 - 23 Vis sammendrag
  • Hammer, Hugo Lewi; Riegler, Michael Alexander; Øvrelid, Lilja & Velldal, Erik (2019). THREAT: A Large Annotated Corpus for Detection of Violent Threats, In  Proceedings of Content Based Multimedia Information (CBMI 2019).  IEEE conference proceedings.  ISBN 978-1-7281-4673-7.
  • Kutuzov, Andrei; Velldal, Erik & Øvrelid, Lilja (2019). One-to-X Analogical Reasoning on Word Embeddings: a Case for Diachronic Armed Conflict Prediction from News Texts, In Nina Tahmasebi; Lars Borin; Adam Jatowt & Yang Xu (ed.),  Proceedings of the 1st International Workshop on Computational Approaches to Historical Language Change.  Association for Computational Linguistics.  ISBN 978-1-950737-31-4.  chapter.  s 196 - 201 Vis sammendrag
  • Mæhlum, Petter; Barnes, Jeremy Claude; Øvrelid, Lilja & Velldal, Erik (2019). Annotating evaluative sentences for sentiment analysis: a dataset for Norwegian, In Mareike Hartmann & Barbara Plank (ed.),  Proceedings of the 22nd Nordic Conference on Computational Linguistics (NoDaLiDa).  Linköping University Electronic Press.  ISBN 978-91-7929-995-8.  Artikkel.  s 121 - 130 Vis sammendrag
  • Ravishankar, Vinit; Gökirmak, Memduh; Øvrelid, Lilja & Velldal, Erik (2019). Multilingual Probing of Deep Pre-Trained Contextual Encoders, In Joakim Nivre; Leon Derczynski; Filip Ginter; Bjørn Lindi; Stephan Oepen; Anders Søgaard & Jorg Tidemann (ed.),  Proceedings of the First NLPL Workshop on Deep Learning for Natural Language Processing.  Linköping University Electronic Press.  ISBN 978-91-7929-999-6.  Article.  s 37 - 47
  • Ravishankar, Vinit; Øvrelid, Lilja & Velldal, Erik (2019). Probing Multilingual Sentence Representations With X-Probe, In  Proceedings of the 4th Workshop on Representation Learning for NLP (RepL4NLP-2019).  Association for Computational Linguistics.  ISBN 978-1-950737-35-2.  Chapter / article.  s 156 - 168 Vis sammendrag
  • Rodina, Julia; Bakshandaeva, Daria; Fomin, Vadim; Kutuzov, Andrei; Touileb, Samia & Velldal, Erik (2019). Measuring Diachronic Evolution of Evaluative Adjectives with Word Embeddings: the Case for English, Norwegian, and Russian, In Nina Tahmasebi; Lars Borin; Adam Jatowt & Yang Xu (ed.),  Proceedings of the 1st International Workshop on Computational Approaches to Historical Language Change.  Association for Computational Linguistics.  ISBN 978-1-950737-31-4.  chapter.  s 202 - 209 Vis sammendrag
  • Fares, Murhaf; Oepen, Stephan & Velldal, Erik (2018). Transfer and Multi-Task Learning for Noun–Noun Compound Interpretation, In Ellen Riloff (ed.),  Proceedings of the 2018 Conference on Empirical Methods in Natural Language Processing.  Association for Computational Linguistics.  ISBN 978-1-948087-84-1.  Paper.  s 1488 - 1498 Vis sammendrag
  • Kutuzov, Andrei; Øvrelid, Lilja; Szymanski, Terrence & Velldal, Erik (2018). Diachronic word embeddings and semantic shifts: a survey, In  Proceedings of the 27th International Conference on Computational Linguistics.  Association for Computational Linguistics.  ISBN 978-1-948087-50-6.  conference paper.  s 1384 - 1397 Fulltekst i vitenarkiv. Vis sammendrag
  • Lapponi, Emanuele; Søyland, Martin G.; Velldal, Erik & Oepen, Stephan (2018). The Talk of Norway: A Richly Annotated Corpus of the Norwegian Parliament, 1998–2016. Language Resources and Evaluation.  ISSN 1574-020X.  52(3), s 873- 893 . doi: 10.1007/s10579-018-9411-5 Vis sammendrag
  • Stadsnes, Cathrine; Øvrelid, Lilja & Velldal, Erik (2018). Evaluating Semantic Vectors for Norwegian. NIK: Norsk Informatikkonferanse.  ISSN 1892-0713. Vis sammendrag
  • Velldal, Erik; Øvrelid, Lilja; Bergem, Eivind Alexander; Stadsnes, Cathrine; Touileb, Samia & Jørgensen, Fredrik (2018). NoReC: The Norwegian Review Corpus, In Nicoletta Calzolari; Khalid Choukri; Christopher Cieri; Thierry Declerck; Sara Goggi; Koiti Hasida; Hitoshi Isahara; Bente Maegaard; Joseph Mariani; Hélène Mazo; Asuncion Moreno; Jan Odijk; Stelios Piperidis & Takenobu Tokunaga (ed.),  Proceedings of the Eleventh International Conference on Language Resources and Evaluation.  European Language Resources Association.  ISBN 979-10-95546-00-9.  Article.  s 4186 - 4191 Vis sammendrag
  • Eckart de Castilho, Richard; Ide, Nancy; Lapponi, Emanuele; Oepen, Stephan; Suderman, Keith; Velldal, Erik & Verhagen, Marc (2017). Representation and Interchange of Linguistic Annotation. An In-Depth, Side-by-Side Comparison of Three Designs, In Nathan Schneider & Nianwen Xue (ed.),  Proceedings of the 11th Linguistic Annotation Workshop.  Association for Computational Linguistics.  ISBN 978-1-945626-39-5.  Chapter.  s 67 - 75
  • Enger, Martine; Velldal, Erik & Øvrelid, Lilja (2017). An open-source tool for negation detection: a maximum-margin approach, In Eduardo Blanco; Roser Morante & Roser Saurí (ed.),  Proceedings of the Workshop on Computational Semantics Beyond Events and Roles.  Association for Computational Linguistics.  ISBN 978-1-945626-49-4.  Artikkel W17-1810.  s 64 - 69 Vis sammendrag
  • Hohle, Petter; Øvrelid, Lilja & Velldal, Erik (2017). Optimizing a PoS Tagset for Norwegian Dependency Parsing, In Jörg Tiedemann (ed.),  Proceedings of the 21st Nordic Conference on Computational Linguistics (NoDaLiDa).  Linköping University Electronic Press.  ISBN 978-91-7685-601-7.  Article no. 017.  s 142 - 151 Fulltekst i vitenarkiv. Vis sammendrag
  • Kutuzov, Andrei; Fares, Murhaf; Oepen, Stephan & Velldal, Erik (2017). Word vectors, reuse, and replicability: Towards a community repository of large-text resources, In Jörg Tiedemann (ed.),  Proceedings of the 21st Nordic Conference on Computational Linguistics (NoDaLiDa).  Linköping University Electronic Press.  ISBN 978-91-7685-601-7.  chapter.  s 271 - 276 Fulltekst i vitenarkiv. Vis sammendrag
  • Kutuzov, Andrei; Velldal, Erik & Øvrelid, Lilja (2017). Temporal dynamics of semantic relations in word embeddings: an application to predicting armed conflict participants, In  Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing.  Association for Computational Linguistics.  ISBN 978-1-945626-83-8.  chapter.  s 1825 - 1830 Fulltekst i vitenarkiv. Vis sammendrag
  • Kutuzov, Andrei; Velldal, Erik & Øvrelid, Lilja (2017). Tracing armed conflicts with diachronic word embedding models, In Tommaso Caselli (ed.),  Proceedings of the Events and Stories in the News Workshop.  Association for Computational Linguistics.  ISBN 978-1-945626-63-0.  Chapter.  s 31 - 36 Fulltekst i vitenarkiv. Vis sammendrag
  • Oepen, Stephan; Øvrelid, Lilja; Björne, Jari; Johansson, Richard; Lapponi, Emanuele; Ginter, Filip & Velldal, Erik (2017). The 2017 Shared Task on Extrinsic Parser Evaluation: Towards a Reusable Community Infrastructure, In Stephan Oepen (ed.),  Proceedings of the 2017 Shared Task on Extrinsic Parser Evaluation at the Fourth International Conference on Dependency Linguistics and the 15th International Conference on Parsing Technologies.  Association for Computational Linguistics.  ISBN 978-1-945626-74-6.  Article.  s 1 - 16
  • Sand, Heidi Marion; Velldal, Erik & Øvrelid, Lilja (2017). Wordnet extension via word embeddings: Experiments on the Norwegian Wordnet, In Jörg Tiedemann (ed.),  Proceedings of the 21st Nordic Conference on Computational Linguistics (NoDaLiDa).  Linköping University Electronic Press.  ISBN 978-91-7685-601-7.  Article no. 042.  s 298 - 302 Fulltekst i vitenarkiv. Vis sammendrag
  • Velldal, Erik; Øvrelid, Lilja & Hohle, Petter (2017). Joint UD Parsing of Norwegian Bokmål and Nynorsk, In Jörg Tiedemann (ed.),  Proceedings of the 21st Nordic Conference on Computational Linguistics (NoDaLiDa).  Linköping University Electronic Press.  ISBN 978-91-7685-601-7.  Article no. 001.  s 1 - 10 Fulltekst i vitenarkiv. Vis sammendrag
  • Kutuzov, Andrei; Velldal, Erik & Øvrelid, Lilja (2016). Redefining part-of-speech classes with distributional semantic models, In  Proceedings of The 20th SIGNLL Conference on Computational Natural Language Learning (CoNLL).  Association for Computational Linguistics.  ISBN 978-1-945626-19-7.  Chapter.  s 115 - 125 Fulltekst i vitenarkiv.
  • Oepen, Stephan; Read, Jonathon; Scheffler, Tatjana; Sidarenka, Uladzimir; Stede, Manfred; Velldal, Erik & Øvrelid, Lilja (2016). OPT: Oslo–Potsdam–Teesside. Pipelining Rules, Rankers, and Classifier Ensembles for Shallow Discourse Parsing, In Nianwen Xue (ed.),  Proceedings of the CoNLL-16 Shared Task.  Association for Computational Linguistics.  ISBN 978-1-932432-66-4.  Chapter.  s 20 - 26
  • Read, Jonathon; Velldal, Erik; Cavazza, Marc & Georg, Gersende (2016). A corpus of clinical practice guidelines annotated with the importance of recommendations, In  Proceedings of the Tenth International Conference on Language Resources and Evaluation (LREC 2016).  European Language Resources Association.  ISBN 978-2-9517408-9-1.  Kapittel.  s 1724 - 1731
  • Wester, Aksel Ladegård; Øvrelid, Lilja; Velldal, Erik & Hammer, Hugo Lewi (2016). Threat detection in online discussions, In  Proceedings of the 7th Workshop on Computational Approaches to Subjectivity, Sentiment and Social Media Analysis WASSA@NAACL-HLT 2016 (WASSA 2016).  Association for Computational Linguistics.  ISBN 978-1-941643-82-2.  Artikkel.  s 66 - 71
  • Fares, Murhaf; Oepen, Stephan & Velldal, Erik (2015). Identifying Compounds: On The Role of Syntax, In Markus Dickinson; Erhard Hinrichs; Agnieszka Patejuk & Adam Przepiórkowski (ed.),  Proceedings of the Fourteenth Workshop on Treebanks and Linguistic Theories (TLT14).  Institute of Computer Science, Polish Academy of Sciences (IPI-PAN).  ISBN 978-83-63159-18-4.  Article.
  • Lien, Jostein; Velldal, Erik & Øvrelid, Lilja (2015). Improving cross-domain dependency parsing with dependency-derived clusters, In Beáta Megyesi (ed.),  Proceedings of the 20th Nordic Conference of Computational Linguistics.  Linköping University Electronic Press.  ISBN 978-91-7519-098-3.  Artikkel.  s 117 - 126 Fulltekst i vitenarkiv.
  • Høyland, Bjørn; Godbout, Jean-François; Lapponi, Emanuele & Velldal, Erik (2014). Predicting Party Affiliations from European Parliament Debates, In Cristian Danescu-Niculescu-Miz; Jacob Eisenstein; Kathleen McKeown & Noah Smith (ed.),  Proceedings of the ACL 2014 Workshop on Language Technologies and Computational Social Science.  Association for Computational Linguistics.  ISBN 978-1-941643-10-5.  artikkel.  s 56 - 60
  • Lapponi, Emanuele; Velldal, Erik; Oepen, Stephan & Knudsen, Rune Lain (2014). Off-Road LAF: Encoding and Processing Annotations in NLP Workflows, In Nicoletta Calzolari; Khalid Choukri; Thierry Declerck; Hrafn Loftsson; Bente Maegaard; Joseph Mariani; Asuncion Moreno; Jan Odijk & Stelios Piperidis (ed.),  Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14).  European Language Resources Association.  ISBN 978-2-9517408-8-4.  artikkel.  s 4578 - 4584
  • Lapponi, Emanuele; Velldal, Erik; Vazov, Nikolay Aleksandrov & Oepen, Stephan (2013). HPC-ready Language Analysis for Human Beings, In Stephan Oepen; Kristin Hagen & Janne Bondi Johannessen (ed.),  Proceedings of the 19th Nordic Conference of Computational Linguistics (NODALIDA 2013).  Linköping University Electronic Press.  ISBN 978-91-7519-589-6.  article.  s 447 - 452 Fulltekst i vitenarkiv.
  • Lapponi, Emanuele; Velldal, Erik; Vazov, Nikolay Aleksandrov & Oepen, Stephan (2013). Towards large-scale language analysis in the cloud, In Koenraad De Smedt; Lars Borin; Krister Lindén; Bente Maegaard; Eiríkur Rögnvaldsson & Kadri Vider (ed.),  Proceedings of the workshop on Nordic language research infrastructure at NODALIDA 2013.  Linköping University Electronic Press.  ISBN 978-91-7519-585-8.  article.  s 1 - 10 Fulltekst i vitenarkiv.
  • Lapponi, Emanuele; Velldal, Erik; Øvrelid, Lilja & Read, Jonathon (2012). UiO2: Sequence-labeling Negation Using Dependency Features, In Eneko Agirre; Johan Bos & Mona Diab (ed.),  *SEM 2012: The First Joint Conference on Lexical and Computational Semantics --- Volume 1: Proceedings of the main conference and the shared task.  Association for Computational Linguistics.  ISBN 978-1-937284-21-3.  paper.  s 319 - 327
  • Read, Jonathon; Velldal, Erik & Øvrelid, Lilja (2012). Labeling Emotions in Suicide Notes: Cost-Sensitive Learning with Heterogeneous Features. Biomedical Informatics Insights.  ISSN 1178-2226.  5, s 99- 103 . doi: 10.4137/BII.S8930
  • Read, Jonathon; Velldal, Erik & Øvrelid, Lilja (2012). Topic classification for Suicidology. Journal of Computing Science and Engineering.  ISSN 1976-4677.  6(2), s 143- 150 . doi: 10.5626/JCSE.2012.6.2.143
  • Read, Jonathon; Velldal, Erik; Øvrelid, Lilja & Oepen, Stephan (2012). UiO1: Constituent-Based Discriminative Ranking for Negation Resolution, In Eneko Agirre; Johan Bos & Mona Diab (ed.),  *SEM 2012: The First Joint Conference on Lexical and Computational Semantics --- Volume 1: Proceedings of the main conference and the shared task.  Association for Computational Linguistics.  ISBN 978-1-937284-21-3.  paper.  s 310 - 318
  • Velldal, Erik & Read, Jonathon (2012). Factuality Detection on the Cheap: Inferring Factuality for Increased Precision in Detecting Negated Events, In Roser Morante & Caroline Sporleder (ed.),  Proceedings of the Workshop on Extra-Propositional Aspects of Meaning in Computational Linguistics, ExProM '12.  Association for Computational Linguistics.  ISBN 978-1-937284-34-3.  paper.  s 28 - 36
  • Velldal, Erik; Øvrelid, Lilja; Read, Jonathon & Oepen, Stephan (2012). Speculation and Negation: Rules, Rankers, and the Role of Syntax. Computational Linguistics.  ISSN 0891-2017.  38(2), s 369- 410 . doi: 10.1162/COLI_a_00126 Vis sammendrag
  • Bond, Francis; Oepen, Stephan; Nichols, Eric; Flickinger, Dan; Velldal, Erik & Haugereid, Petter (2011). Deep open-source machine translation. Machine Translation.  ISSN 0922-6567.  25(2), s 87- 105 . doi: 10.1007/s10590-011-9099-4
  • Read, Jonathon; Velldal, Erik; Oepen, Stephan & Øvrelid, Lilja (2011). Resolving speculation and negation scope in biomedical articles with a syntactic constituent ranker, In Helena Hong Gao & Minghui Dong (ed.),  Proceedings of the 25th Pacific Asia Conference on Language, Information and Computation, and the Fourth International Symposium on Languages in Biology and Medicine.  Pacific Asia Conference on Language, Information and Computation.  ISBN 978-4-905166-02-3.  Conference Paper.
  • Read, Jonathon; Velldal, Erik & Øvrelid, Lilja (2011). Topic classification for suicidology, In Helena Hong Gao & Minghui Dong (ed.),  Proceedings of the 25th Pacific Asia Conference on Language, Information and Computation, and the Fourth International Symposium on Languages in Biology and Medicine.  Pacific Asia Conference on Language, Information and Computation.  ISBN 978-4-905166-02-3.  Conference Paper.  s 78 - 85
  • Velldal, Erik (2011). Predicting Speculation: A Simple Disambiguation Approach to Hedge Detection in Biomedical Literature. Journal of Biomedical Semantics.  ISSN 2041-1480.  2
  • Velldal, Erik (2011). Random Indexing Re-Hashed. NEALT Proceedings Series.  ISSN 1736-8197.  11, s 224- 229
  • Velldal, Erik; Øvrelid, Lilja & Oepen, Stephan (2010). Resolving Speculation: MaxEnt Cue Classification and Dependency-Based Scope Rules, In Richárd Farkas (ed.),  Proceedings of the Fourteenth Conference on Computational Natural Language Learning -- Shared Task.  Association for Computational Linguistics.  ISBN 978-1-932432-84-8.  artikkel nr. 7.  s 48 - 55
  • Øvrelid, Lilja; Velldal, Erik & Oepen, Stephan (2010). Syntactic Scope Resolution in Uncertainty Analysis, In Dan Jurafsky (ed.),  Proceedings of the 23rd International Conference on Computational Linguistics (Coling 2010).  Daheng Electronic Press.  ISBN 978-7-900268-00-6.  artikkel.  s 1379 - 1387
  • Oepen, Stephan; Velldal, Erik; Lønning, Jan Tore; Meurer, Paul; Rosén, Victoria & Flickinger, Dan (2007). Towards Hybrid Quality-Oriented Machine Translation. On Linguistics and Probabilities in MT, In Andy Way & Barbara Gawronska (ed.),  Proceedings of the 11th International Conference on Theoretical Issues in Machine Translation.  Skövde University Studies in Informatics.  ISBN 978-91-977095-0-7.  Chapter 18.  s 144 - 153
  • Velldal, Erik & Oepen, Stephan (2006). Statistical Ranking in Tactical Generation, In Dan Jurafsky & Eric Gaussier (ed.),  Proceedings of the 2006 Conference on Empirical Methods in Natural Language Processing.  Association for Computational Linguistics.  ISBN 1-932432-73-6.  KAPITTEL.  s 517 - 525
  • Velldal, Erik & Oepen, Stephan (2005). Maximum Entropy Models for Realization Ranking, In Jun-ichi Tsujii (ed.),  Proceedings of the 10th Machine Translation Summit.  Asia-Pacific Association for Machine Translation.  ISBN 974-7431-26-2.  KAPITTEL.

Se alle arbeider i Cristin

  • Fares, Murhaf; Oepen, Stephan & Velldal, Erik (2015). Identifying Compounds: On The Role of Syntax.
  • Lapponi, Emanuele; Oepen, Stephan; Skjærholt, Arne & Velldal, Erik (2015). LAP: The CLARINO Language Analysis Portal.
  • Read, Jonathon & Velldal, Erik (2011). Labeling emotions in suicide notes: Cost-sensitive learning with heterogeneous features.
  • Velldal, Erik (2011). Random Indexing Re-Hashed.
  • Velldal, Erik (2010). Detecting Uncertainty in Biomedical Literature: A Simple Disambiguation Approach Using Sparse Random Indexing.
  • Velldal, Erik (2008). Empirical Realization Ranking. Acta Humaniora. 349. Vis sammendrag
  • Velldal, Erik (2005). A Fuzzy Clustering Approach to Word Sense Discrimination.
  • Oepen, Stephan; Dyvik, Helge; Lønning, Jan Tore; Velldal, Erik; Beermann, Dorothee; Carroll, John; Flickinger, Dan; Hellan, Lars; Johannessen, Janne Bondi; Meurer, Paul; Nordgård, Torbjørn & Rosén, Victoria (2004). Som å kappete med trollet? Towards MRS-Based Norwegian-English Machine Translation.
  • Velldal, Erik; Oepen, Stephan & Flickinger, Dan (2004). Paraphrasing Treebanks for Stochastic Realization Ranking.
  • Lønning, Jan Tore; Oepen, Stephan; Beermann, Dorothee; Hellan, Lars; Carroll, John; Dyvik, Helge; Flickinger, Dan; Johannessen, Janne Bondi; Meurer, Paul; Nordgård, Torbjørn; Rosén, Victoria & Velldal, Erik (2004). LOGON - A Norwegian MT Effort.

Se alle arbeider i Cristin

Publisert 4. nov. 2010 14:24 - Sist endret 16. aug. 2019 14:55

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