E-mail: andreas.vlachos AT cl.cam.ac.uk.
I am a postdoc in the Computer Laboratory at the University of Cambridge working with Stephen Clark on semantic parsing in the context of the SpaceBook project. Earlier, I was a postdoc in the department of Biostatistics and Medical Informatics at the University of Wisconsin-Madison working with Mark Craven on information extraction from biomedical text. From October 2006 until December 2009, I was a PhD student at the NLIP group of the Computer Laboratory at the University of Cambridge under the supervision of Ted Briscoe, receiving further advice from Zoubin Ghahramani. My thesis explored ways of reducing the annotation cost for biomedical natural language processing and I was funded by a Gates award. Before that, from November 2004 until September 2006, I worked on the project: Integrating Literature, Experiments and Curation in Drosophila Genomics Research. I hold an MSc in Informatics from the University of Edinburgh and a BSc from the Athens University of Economics and Business.
Vlachos, A., Craven, M. 2012. Biomedical event extraction from abstracts and full papers using search-based structured prediction (PREPRINT), in BMC Bioinformatics, Volume 13, Supplement 8. It supersedes the BioNLP2011 paper with the same title. The code to train and evaluate the systems described in this paper is available upon request.
Vlachos, A., Craven, M. 2011. Search-based Structured Prediction applied to Biomedical Event Extraction, in Proceedings of CoNLL at ACL, Portland.
Vlachos, A., Craven, M. 2011. Biomedical Event Extraction from Abstracts and Full Papers using Search-based Structured Prediction, in Proceedings of the BioNLP shared task at ACL, Portland.
Vlachos, A. 2011. Evaluating unsupervised learning for natural language processing tasks, in Proceedings of the EMNLP 2011 Workshop on Unsupervised Learning in NLP, Edinburgh.
Vlachos, A. 2010. Two strong baselines for the BioNLP 2009 event extraction task, in Proceedings of BioNLP at ACL, Uppsala. The code to train and evaluate the systems described in this paper is available upon request.
Vlachos, A., Craven, M. 2010. Detecting Speculative Language using Syntactic Dependencies and Logistic Regression, in Proceedings of the CoNLL shared task at ACL, Uppsala.
Vlachos, A., Ghahramani Z., Briscoe, T. 2010. Active learning for constrained Dirichlet process mixture models, in Proceedings of the workshop on GEometrical Models of Natural Language Semantics at ACL, Uppsala.
Bratières, S., van Gael, J., Vlachos, A., Ghahramani, Z. 2010. Scaling the iHMM: Parallelization versus Hadoop, in Proceedings of the Workshop on Scalable Machine Learning and Applications at the IEEE International Conference on Computing and Information Technology, Bradford. It also appeared as a poster in AISTATS-2010.
Van Gael, J., Vlachos, A., Ghahramani, Z. 2009. The infinite HMM for unsupervised PoS tagging, in Proceedings of EMNLP, pages 678-687, Singapore.
Vlachos, A., Buttery, P., Ó Séaghdha, D., Briscoe, T. 2009. Biomedical Event Extraction without Training Data, in Proceedings of the BioNLP shared task at NAACL, pages 37-40, Boulder.
Vlachos, A., Korhonen, A., Ghahramani, Z. 2009. Unsupervised and Constrained Dirichlet Process Mixture Models for Verb Clustering, in Proceedings of the workshop on GEometrical Models of Natural Language Semantics at EACL, Athens.
Vlachos, A., Ghahramani, Z., Korhonen, A. 2008. Dirichlet Process Mixture Models for Verb Clustering, in Proceedings of the workshop on Prior Knowledge for Text and Language at ICML, Helsinki.
Karamanis, N,, Seal, R., Lewin, I., McQuilton, P., Vlachos, A., Gasperin, A., Drysdale, R., Briscoe, T. 2008. Natural Language Processing in aid of FlyBase curators, in BMC Bioinformatics, Volume 9:193, 2008.
Vlachos, A. 2008. A stopping criterion for active learning, draft, publisher's website, in Computer, Speech and Language, Volume 22, Issue 3, July 2008, pages 295-312.
Vlachos, A. 2007. Evaluating and combining biomedical named entity recognition systems, in Poster Proceedings of BioNLP at ACL, pages 199-206, Prague.
Vlachos, A. 2007. Tackling the BioCreative2 Gene Mention task with Conditional Random Fields and syntactic parsing, in Proceedings of BioCreative2, Madrid.
Korkontzelos, I., Vlachos, A., Lewin, I. 2007. From gene names to actual genes, in Proceedings of BioLink at ISMB, Vienna.
Vlachos, A., Gasperin C. 2006. Bootstrapping and Evaluating Named Entity Recognition in the Biomedical Domain, in Poster Proceedings of BioNLP at HLT-NAACL, pages 138-145, New York.
Vlachos, A. 2006. Active Annotation, in Proceedings of the workshop on Adaptive Text Extraction and Mining at EACL, Trento.
Vlachos, A., Gasperin, C., Lewin, I., Briscoe, T. 2006. Bootstrapping the recognition and anaphoric linking of named entities in Drosophila articles, in Proceedings of the Pacific Symposium in Biocomputing 2006, pages 100-111, Maui.Theodorakis, M., Vlachos, A., Kalamboukis, T. Z. 2004. Using Hierarchical Clustering to Enhance Classification Accuracy, in Proceedings of the 3rd Hellenic Conference in Artificial Intelligence, Samos.
Semi-supervised learning for biomedical information extraction, 2010, Computer Laboratory, University of Cambridge.
Active learning with support vector machines, 2004, School of Informatics, University of Edinburgh.
Reviewer for: ACL2009-2011, EMNLP2010-2011, IJCAI2011, AAAI2011, CoNLL2010, EACL2009, Journal of Artificial Intelligence Research, ACM Transactions in Speech and Language Processing, Bioinformatics, Journal of Biomedical Informatics, Computer Speech and Language, Journal of Natural Language Engineering.
Diarmuid Ó Séaghdha and I started a reading group for NLP papers. Also, I co-supervised 4 MPhil projects in the context of the (now defunct) MPhil course in Computer Speech, Text and Internet Technology.
Music, photography, dancing, sports, cinema, literature, travelling.