João Graça
João Graça
Addresses: l2f www mail
Phone: +351-213-100-351 Fax: +351-213-145-843

João Graça is currently a research scientist at FlashGroup and a researcher at Inesc-ID. Previously he was a post doctoral researcher at the University of Pennsylvania working under the supervision of Prof. Ben Taskar. He obtained his PhD in Computer Science Engineering at Instituto Superior Técnico, Technical University of Lisbon, where he was advised jointly by Luisa Coheur, Fernando Pereira and Ben Taskar. His main research interest are Machine Learning and Natural Language Processing. Currently his research focus on unsupervised learning with high level supervision in the form of domain specific prior knowledge, and on the utility of unsupervised methods for real world applications.

Research Interests

  • Machine Learning
  • Natural Language Processing
  • Statistical Machine Translation
  • Software Engineering applied to NLP

Ongoing Projects

Finished Projects

  • A computational framework for a Natural Language course

INESC ID Information

Publications

International Journals

2011

2010

  • João Graça, Kuzman Ganchev, Ben Taskar, Learning Tractable Word Alignment Models with Complex Constraints, Computational Linguistics, MIT Press, pages 1-24, July 2010
  • Kuzman Ganchev, João Graça, Jennifer Gillenwater, Ben Taskar, Posterior Regularization for Structured Latent Variable Models, Journal of Machine Learning Research, vol. 11, pages 2001−2, July 2010

2009

  • João Graça, Kuzman Ganchev, Ben Taskar, PostCat - Posterior Constrained Alignment Toolkit, The Prague Bulletin Of Mathematical Linguistics - Special Issue: Open Source Tools for Machine Translation, Charles University, vol. 91, pages 27-37, Prague, January 2009

International Conferences

2012

  • Wang Ling, João Graça, Isabel Trancoso, Alan Black, Entropy-based Pruning for Phrase-based Machine Translation, In 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning, Association for Computational Linguistics, Jeju Island, Korea, July 2012
  • Shen Li, João Graça, Wiki-ly Supervised Part-of-Speech Tagging, In 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning, Association for Computational Linguistics, Jeju Island, Korea, July 2012
  • Shen Li, João Graça, Ben Taskar, Wiki-ly Supervised Part-of-Speech Tagging, In 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning, Jeju Island, Korea, July 2012

2011

  • Wang Ling, Tiago Luís, João Graça, Isabel Trancoso, Luísa Coheur, Reordering Modeling using Weighted Alignment Matrices, In Proc. ACL 2011 - The 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies, ACL, pages 450-454, Short paper, Portland, Oregon, USA, June 2011

2010

  • D. Lambov, Gael Dias, João Graça, Multi-view Learning for Text Subjectivity Classification, In 19th European Conference on Artificial Intelligence Workshop on Computational Approaches to Subjectivity and Sentiment Analysis (ECAI 2010), Lisbon, Portugal, August 2010
  • J. Gillenwater, João Graça, K. Ganchev, B. Taskar, Sparsity in Dependency Grammar Induction, In ACL 2010, Association for Computational Linguistics (ACL), Uppsala, Sweden, July 2010

2009

  • K. Ganchev, João Graça, B. Taskar , F. Pereira, Posterior vs. Parameter Sparsity in Latent Variable Models, In Neural Information Processing Systems Conference (NIPS), December 2009

2008

  • Kuzman Ganchev, João Graça, Ben Taskar, Better Alignments = Better Translations?, In ACL-08: HLT, Association for Computational Linguistics, pages 986-993, http://www.aclweb.org/anthology/P/P08/P08-1112, Columbus, Ohio, June 2008

2007

  • João Graça, Diamantino António Caseiro, Luísa Coheur, The INESC-ID IWSLT07 SMT System, In Proceedings of IWSLT International Workshop on Spoken Language Translation, pages 125-130, October 2007
  • Mark Dredze, John Blitzer, Pratha Pratim Talukdar, Kuzman Ganchev, João Graça, Fernando Pereira, Frustratingly Hard Domain Adaptation for Parsing, In Conference on Computational Natural Language Learning, Association for Computational Linguistics, Prague, Czech Republic, June 2007

2006

  • João Graça, Nuno J. Mamede, João Carlos Serrenho Dias Pereira, A Framework for Integrating Natural Language Tools, In PROPOR'2006 - Computational Processing of the Portuguese Language, Springer Verlag, Berlin / Heidelberg, vol. 3960, series Lecture Notes in Computer Science, pages 110-119, Itatiaia, Brazil, May 2006
  • João Graça, Nuno J. Mamede, João Carlos Serrenho Dias Pereira, NLP Tools Integration Using a Multi-Layered Repository, In Merging and Layering Linguistic Information Workshop, a satellite of the 5th Edition of the International Conference on Language Resource and Evaluation, LREC, pages 24-32, Genova, Italy, May 2006

2005

  • João Graça, Márcio Duarte Albasini Mourão, Orlando Anunciação, Pedro T. Monteiro, H. Sofia Pinto, Virgilio Loureiro, Ontology building process: the wine domain, In EFITA/WCCA 2005, Vila Real, July 2005

2004

  • João Graça, Nuno J. Mamede, João Carlos Serrenho Dias Pereira, A Run-Time Shared Repository for NLP Applications, In Proceedings of the Herramientas y Recursos Linguísticos para el Español y el Portugués workshop, a satelite of the Ninth, pages 257-264, Puebla, Mexico, November 2004

2002

National Journals

2009

  • João Graça, Diamantino António Caseiro, Luísa Coheur, Tradução Automática Estatística, 3Ts - Revista de Tradução, Terminologia e Tecnologias, n. 0, pages 91-102, December 2009

Technical Reports

2012

  • Anabela Marques Barreiro, Luísa Coheur, Tiago Luís, Angela Costa, João Graça, CLUE Guidelines, Tech. Rep. 17 / 2012 INESC-ID Lisboa, June 2012

2008

Doctoral Theses

2010

Masters Theses

2006

Graduation Theses

2002

  • João Graça, Alexandre Manuel Fonseca Mateus, Creating Resources for Natural Language Students, Graduation thesis, December 2002

Activity as Advisor

Ongoing

  • Aplicação de métodos de aprendizagem ativa em Língua Natural

    (as co-advisor), Nuno André Jeremias de Aniceto, MSc thesis. (2013-). Nuno João Neves Mamede, advisor.

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