Publications

Conferences & Workshops   |   Journals/Books/Theses   |   Project deliverables


Simon Keizer, Mary Ellen Foster, Andre Gaschler, Manuel Giuliani, Amy Isard, and Oliver Lemon. Handling uncertain input in multi-user human-robot interaction.  In Proceedings of the 23rd IEEE International Symposium on Robot and Human Interactive Communication (RO-MAN), Edinburgh, UK, August 2014.

Simon Keizer, Pantelis Kastoris, Mary Ellen Foster, Amol Deshmukh, and Oliver Lemon. Evaluating a social multi-user interaction model using a Nao robot. In Proceedings of the 23rd IEEE International Symposium on Robot and Human Interactive Communication (RO-MAN), Edinburgh, UK, August 2014.

Mary Ellen Foster, Simon Keizer, Oliver Lemon. Towards action selection under uncertainty for a socially aware robot bartender.  In Proceedings ACM/IEEE International Conference on Human-Robot Interaction (HRI), Bielefeld, Germany, March 2014.

Simon Keizer, Pantelis Kastoris, Mary Ellen Foster, Amol Deshmukh, and Oliver Lemon.  User evaluation of a multi-user social interaction model implemented on a NAO robot.  In Proceedings ICSR 2013 Workshop 'Robots in Public Spaces', Bristol, UK, October 2013.

Simon Keizer, Mary Ellen Foster, Oliver Lemon, Andre Gaschler, and Manuel Giuliani.   Training and evaluation of an MDP model for social multi-user human-robot interaction.  In Proceedings of SIGdial.  Metz, France, August 2013.

Verena Rieser, Oliver Lemon, and Simon Keizer. Opponent Modelling for Optimising Strategic Dialogue.  In Proceedings of SEMdial.  Paris, France, September 2012.

N. Asher, A. Lascarides, O. Lemon, M. Guhe, V. Rieser, P. Muller, S. Afantenos, F. Benamara, L. Vieu, P. Denis, S. Paul, S. Keizer,
and C. Dégremont. Modelling Strategic Conversation: the STAC project.  In Proceedings of SEMdial.  Paris, France, September 2012.

Stergos Afantenos, Nicholas Asher, Farah Benamara, Anais Cadilhac, Cedric Dégremont, Pascal Denis, Markus Guhe, Simon Keizer, Alex Lascarides, Oliver Lemon, Philippe Muller, Soumya Paul, Vladimir Popescu, Verena Rieser, Laure Vieu.  Modelling Strategic Conversation: model, annotation design and corpus.  In Proceedings of SEMdial.  Paris, France, September 2012.

Mary Ellen Foster and Simon Keizer and Zhuoran Wang and Oliver Lemon.  Machine Learning of Social States and Skills for Multi-Party Human-Robot Interaction.  In Proceedings of the ECAI Workshop on Machine Learning for Interactive Systems (MLIS): Bridging the Gap Between Language, Motor Control and Vision.  Montpellier, France, August, 2012.

V. Rieser, S. Keizer, X. Liu and O. Lemon.  Adaptive Information Presentation for Spoken Dialogue Systems: Evaluation with human subjects.  In Proceedings of ENLG, Nancy, September 2011.

F. Jurčíček, S. Keizer, M. Gašić, F. Mairesse, B. Thomson, K. Yu and S. Young.  Real user evaluation of spoken dialogue systems using Amazon Mechanical Turk.  In Proceedings of Interspeech, Florence, Italy, August 2011.

Alan W Black, Susanne Burger, Alistair Conkie, Helen Hastie, Simon Keizer, Oliver Lemon, Nicolas Merigaud, Gabriel Parent, Gabriel Schubiner, Blaise Thomson, Jason D. Williams, Kai Yu, Steve Young and Maxine Eskenazi.  Spoken Dialogue Challenge 2010: Comparison of Live and Control Test Results.
In Proceedings of SIGdial, Portland, OR, June 2011.

B. Thomson, F. Jurčíček, M. Gašić, S. Keizer, F. Mairesse, K. Yu and S. Young (2010).  Parameter learning for POMDP spoken dialogue models. 
In Proceedings of SLT, Berkeley, CA, December 2010.

B. Thomson, K. Yu, S. Keizer, M. Gasic, F. Jurčíček, F. Mairesse and S. Young (2010).  Bayesian Update of State for the Let's Go Spoken Dialogue Challenge.
In Proceedings of SLT, Berkeley, CA, December 2010.

F. Jurčíček, B. Thomson, S. Keizer, M. Gašić, F. Mairesse, K. Yu and S. Young.  Natural Belief-Critic: a reinforcement algorithm for parameter estimation in statistical spoken dialogue systems. In Proceedings of Interspeech, Makuhari, Japan, September 2010.

S. Keizer, M. Gašić, F. Jurčíček, F. Mairesse, B. Thomson, K. Yu and S. Young.  Parameter estimation for agenda-based user simulation.
In Proceedings of SIGdial, Tokyo, Japan, September 2010.

M. Gašić, F. Jurčíček, S. Keizer, F. Mairesse, B. Thomson, K. Yu and S. Young.  Gaussian Processes for Fast Policy Optimisation of POMDP-based Dialogue Managers.
In Proceedings of SIGdial, Tokyo, Japan, September 2010.

F. Mairesse, M. Gašić, F. Jurčíček, S. Keizer, B. Thomson, K. Yu and S. Young.  Phrase-based Statistical Language Generation using Graphical Models and Active Learning.
In Proceedings of the 48th Annual Meeting of the Association for Computational Linguistics (ACL), Uppsala, July 2010.

M. Gašić, F. Lefèvre, F. Jurčíček, S. Keizer, F. Mairesse, B. Thomson, K. Yu and S. Young.  Back-off Action Selection in Summary Space-Based POMDP dialogue systems.
In Proceedings of ASRU, Merano, Italy, December 2009. 

F. Jurčíček, M. Gašić, S. Keizer, F. Mairesse, B. Thomson, K. Yu and S. Young.  Transformation-based Learning for Semantic Parsing.
In Proceedings of Interspeech, Brighton, UK, September 2009. 

F. Mairesse, M. Gašić, F. Jurčíček, S. Keizer, B. Thomson, K. Yu and S. Young.  Spoken language understanding from unaligned data using discriminative classification models.
In Proceedings of ICASSP, Taipei, Taiwan, April 2009.

K. Yu, T. Toda, M. Gašić, S. Keizer, F. Mairesse, B. Thomson, and S. Young.  Probabilistic modelling of F0 in unvoiced regions in HMM based speech synthesis.
In Proceedings of ICASSP, Taipei, Taiwan, April 2009. 

S. Keizer, M. Gašić, F. Mairesse, B. Thomson, K. Yu, and S. Young.  Modelling user behaviour in the HIS-POMDP dialogue manager.
In Proceedings of SLT, Goa, India, December 2008.

B. Thomson, K. Yu, M. Gašić, S. Keizer, F. Mairesse, J. Schatzmann and S. Young.  Evaluating semantic-level confidence scores with multiple hypotheses.
In Proceedings of Interspeech, Brisbane, Australia, September 2008. 

B. Thomson, M. Gašić, S. Keizer, F. Mairesse, J. Schatzmann, K. Yu and S. Young.  User study of the Bayesian Update of Dialogue State approach to dialogue management.
In Proceedings of Interspeech, Brisbane, Australia, September 2008. 

M. Gašić, S. Keizer, F. Mairesse, J. Schatzmann, B. Thomson, K. Yu, and S. Young.  Training and Evaluation of the HIS POMDP Dialogue System in Noise.
In Proceedings of the 9th SIGdial Workshop on Discourse and Dialogue, pages 112–119, Columbus, Ohio, June 2008.

In Proceedings of the 8th SIGdial Workshop on Discourse and Dialogue, pages 158-165, Antwerp, Belgium, September 2007.

H. Bunt and R. Morante and S. Keizer.  An empirically based computational model of grounding in dialogue. 
In Proceedings of the 8th SIGdial Workshop on Discourse and Dialogue, pages 283--290, Antwerp, Belgium, September 2007.  

R. Morante and S. Keizer and H. Bunt.  A dialogue act based model for context updating. 
In Proceedings of the 2007 Workshop on the Semantics and Pragmatics of Dialogue (DECALOG), pages 9-16, Rovereto, Italy, May 2007.

S. Keizer and R. Morante.  Dialogue simulation and context dynamics for dialogue management.
In Proceedings of the 16th Nordic Conference of Computational Linguistics (NODALIDA'07), pages 310-317, Tartu, Estonia, May 2007.

S. Keizer and R. Morante.  Context specification and update mechanisms for dialogue management.
In Proceedings of the 18th BeNeLux Conference on Artificial Intelligence (BNAIC'06), pages 181-188, Namur, Belgium, October 2006.

S. Keizer and R. Morante.  DISCUS: a dialogue simulation and context update system. 
In Proceedings of the 10th Workshop on the Semantics and Pragmatics of Dialogue (BRANDIAL), pages 169-170, Potsdam, Germany, September 2006.

In Proceedings 7th SIGdial Workshop on Discourse and Dialogue, pages 37-45, Sydney, Australia, July 15-16 2006.  

S. Keizer and R. Morante.  Dialogue acts as context operators constraining the generation of dialogical discourse.
In Proceedings of the Workshop on Constraints in Discourse, pages 117-124, Maynooth, Ireland, July 7-9 2006.

H. Bunt and S. Keizer.  Dialogue semantics links annotation to context representation. 
In Joint TALK/AMI Workshop on Standards for Multimodal Dialogue Context, Edinburgh, December 2005. 

R. op den Akker, H. Bunt, S. Keizer, and B. van Schooten.  From question answering to spoken dialogue: Towards an information search assistant for interactive multimodal information extraction.
In Proceedings of the 9th European Conference on Speech Communication and Technology (Interspeech), pages 2793-2796, Lisbon, Portugal, 2005.

S. Keizer, R. op den Akker, and A. Nijholt.  Dialogue act recognition with Bayesian networks for Dutch dialogues.
In Proceedings 3rd SIGdial Workshop on Discourse and Dialogue, pages 88-94, Philadelphia, PA, July 2002.  

S. Keizer.  Dialogue act modelling using Bayesian networks. 
In Proceedings of the Sixth ESSLLI Student Session, pages 143-153, Helsinki, August 2001. 

S. Keizer.  A Bayesian approach to dialogue act classification. 
In Proceedings of the 5th Workshop on Formal Semantics and Pragmatics of Dialogue (BI-DIALOG), pages 210-218, Bielefeld, Germany, June 2001.

Conferences & Workshops    |   Journals/Books/Theses   |   Project deliverables


Simon Keizer, Mary Ellen Foster, Zhuoran Wang, and Oliver Lemon. Machine Learning for Social Multi-Party Human-Robot Interaction''.  In ACM Transactions on Intelligent Interactive Systems - Special Issue on Multiple Modalities in Interactive Systems and Robots, 4(3), 2014.

Paul Crook, Simon Keizer, Zhuoran Wang, Wenshuo Tang, and Oliver Lemon.  Real User Evaluation of a POMDP Spoken Dialogue System Using Automatic Belief Compression.  In Computer Speech and Language, 28(4), 873-887, 2014.

Verena Rieser, Oliver Lemon, and Simon Keizer.  Natural Language Generation as Incremental Planning Under Uncertainty: Adaptive Information Presentation for Statistical Dialogue Systems.  In IEEE/ACM Transactions on Audio, Speech, and Language Processing, 22(5), 979-994, 2014.

S. Keizer, S. Rossignol, S. Chandramohan, and O. Pietquin.  User Simulation in the Development of Statistical Spoken Dialogue Managers.

S. Keizer, V. Petukhova, and H. Bunt.  Multidimensional Dialogue Management.
In: A. v.d. Bosch and G. Bouma (eds.) Interactive Multi-modal Question Answering, pages 57-88, Springer, 2011.

S. Young, M. Gašić, S. Keizer, F. Mairesse, J. Schatzmann, B. Thomson and K. Yu.  The Hidden Information State Model: a practical framework for POMDP-based spoken dialogue management.
In Computer Speech and Language, 24(2):150-174, April 2010.  [CSL 2013 Best paper award]

S. Keizer, H. Bunt, and T. Paek. (Eds.)  Proceedings of the 8th SIGdial Workshop on Discourse and Dialogue, Antwerp, Belgium, September 2007.

S. Keizer and R. op den Akker.  Dialogue act recognition under uncertainty using Bayesian networks. 
Natural Language Engineering, Vol.13, Issue 04, December 2006, pp. 287-316.

PhD thesis, University of Twente, Department of Computer Science, Enschede, The Netherlands, September 2003.  

S. Keizer.  Knowledge graphs and the approach of LILOG: Temporal and spatial aspects. 
Master's thesis, University of Twente, Department of Applied Mathematics, December 1997.

Conferences & Workshops   |   Journals/Books/Theses   |   Project deliverables


M.E. Foster, A. Gaschler, M. Giuliani, A. Isard, S. Keizer, M. Pateraki, R. Petrick, M. Sigalas, Z. Wang.  Extended System Evaluation: Uncertain Conditions.
JAMES deliverable D7.4, July 2014.

S. Keizer, M.E. Foster, Z. Wang, O. Lemon. Social Skills Learning under Uncertainty.
JAMES deliverable D5.2, March 2014.

M.E. Foster, S. Keizer, O. Lemon, Z. Wang. Multimodal Social State Processing.
JAMES deliverable D3.2, March 2014.

M.E. Foster, A. Gaschler, M. Giuliani, A. Isard, S. Keizer, M. Pateraki, R. Petrick, M. Sigalas, Z. Wang.  Final Integrated System: Prototype and Evaluation.
JAMES deliverable D7.3, January 2014.

M.E. Foster, A. Gaschler, M. Giuliani, A. Isard, S. Keizer, M. Pateraki, R. Petrick, M. Sigalas.  Second Integrated System: Prototype and Evaluation.
JAMES deliverable D7.2, January 2013.

JAMES deliverable D5.1, July 2012.

R. Laroche, G. Putois, P. Bretier, M. Aranguren, J. Velkovska, H. Hastie, S. Keizer, K. Yu, F. Jurcicek, O. Lemon, S. Young.  Final Evaluation of CLASSiC TownInfo and Appointment Scheduling Systems.
CLASSiC deliverable D6.4 (report), April 2011.

S. Keizer, O. Pietquin, S. Rossignol, and S. Young.  Agenda-based user simulations and EM training tools for Appointment Scheduling and TownInfo domains.
CLASSiC deliverable D3.4 (prototype), October 2010.

P. Bretier, P. Crook, S. Keizer, R. Laroche, O. Lemon, G. Putois.  Initial evaluation of TownInfo and Self-Help systems.
CLASSiC deliverable D6.3 (report), June 2009.

S. Keizer and S. Young.  Improved POMDP-based dialogue system.
CLASSiC deliverable D1.4.1 (prototype), February 2009.

K. Yu, S. Keizer, S. Young, X. Liu, V. Rieser, O. Lemon, J. Henderson, C. Boidin, P. Bretier.  Initial CLASSiC "TownInfo" System.
CLASSiC deliverable D5.2.1 (prototype), February 2009.