Nina Dethlefs


2020

pdf bib
Proceedings of the 21th Annual Meeting of the Special Interest Group on Discourse and Dialogue
Olivier Pietquin | Smaranda Muresan | Vivian Chen | Casey Kennington | David Vandyke | Nina Dethlefs | Koji Inoue | Erik Ekstedt | Stefan Ultes
Proceedings of the 21th Annual Meeting of the Special Interest Group on Discourse and Dialogue

2019

pdf bib
Dilated LSTM with attention for Classification of Suicide Notes
Annika M Schoene | George Lacey | Alexander P Turner | Nina Dethlefs
Proceedings of the Tenth International Workshop on Health Text Mining and Information Analysis (LOUHI 2019)

In this paper we present a dilated LSTM with attention mechanism for document-level classification of suicide notes, last statements and depressed notes. We achieve an accuracy of 87.34% compared to competitive baselines of 80.35% (Logistic Model Tree) and 82.27% (Bi-directional LSTM with Attention). Furthermore, we provide an analysis of both the grammatical and thematic content of suicide notes, last statements and depressed notes. We find that the use of personal pronouns, cognitive processes and references to loved ones are most important. Finally, we show through visualisations of attention weights that the Dilated LSTM with attention is able to identify the same distinguishing features across documents as the linguistic analysis.

2016

pdf bib
Automatic Identification of Suicide Notes from Linguistic and Sentiment Features
Annika Marie Schoene | Nina Dethlefs
Proceedings of the 10th SIGHUM Workshop on Language Technology for Cultural Heritage, Social Sciences, and Humanities

2014

pdf bib
Cluster-based Prediction of User Ratings for Stylistic Surface Realisation
Nina Dethlefs | Heriberto Cuayáhuitl | Helen Hastie | Verena Rieser | Oliver Lemon
Proceedings of the 14th Conference of the European Chapter of the Association for Computational Linguistics

pdf bib
The PARLANCE mobile application for interactive search in English and Mandarin
Helen Hastie | Marie-Aude Aufaure | Panos Alexopoulos | Hugues Bouchard | Catherine Breslin | Heriberto Cuayáhuitl | Nina Dethlefs | Milica Gašić | James Henderson | Oliver Lemon | Xingkun Liu | Peter Mika | Nesrine Ben Mustapha | Tim Potter | Verena Rieser | Blaise Thomson | Pirros Tsiakoulis | Yves Vanrompay | Boris Villazon-Terrazas | Majid Yazdani | Steve Young | Yanchao Yu
Proceedings of the 15th Annual Meeting of the Special Interest Group on Discourse and Dialogue (SIGDIAL)

2013

pdf bib
Demonstration of the PARLANCE system: a data-driven incremental, spoken dialogue system for interactive search
Helen Hastie | Marie-Aude Aufaure | Panos Alexopoulos | Heriberto Cuayáhuitl | Nina Dethlefs | Milica Gasic | James Henderson | Oliver Lemon | Xingkun Liu | Peter Mika | Nesrine Ben Mustapha | Verena Rieser | Blaise Thomson | Pirros Tsiakoulis | Yves Vanrompay
Proceedings of the SIGDIAL 2013 Conference

pdf bib
Impact of ASR N-Best Information on Bayesian Dialogue Act Recognition
Heriberto Cuayáhuitl | Nina Dethlefs | Helen Hastie | Oliver Lemon
Proceedings of the SIGDIAL 2013 Conference

pdf bib
Conditional Random Fields for Responsive Surface Realisation using Global Features
Nina Dethlefs | Helen Hastie | Heriberto Cuayáhuitl | Oliver Lemon
Proceedings of the 51st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)

2012

pdf bib
Comparing HMMs and Bayesian Networks for Surface Realisation
Nina Dethlefs | Heriberto Cuayáhuitl
Proceedings of the 2012 Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies

pdf bib
Optimising Incremental Generation for Spoken Dialogue Systems: Reducing the Need for Fillers
Nina Dethlefs | Helen Hastie | Verena Rieser | Oliver Lemon
INLG 2012 Proceedings of the Seventh International Natural Language Generation Conference

pdf bib
Dialogue Systems Using Online Learning: Beyond Empirical Methods
Heriberto Cuayáhuitl | Nina Dethlefs
NAACL-HLT Workshop on Future directions and needs in the Spoken Dialog Community: Tools and Data (SDCTD 2012)

pdf bib
Incremental Spoken Dialogue Systems: Tools and Data
Helen Hastie | Oliver Lemon | Nina Dethlefs
NAACL-HLT Workshop on Future directions and needs in the Spoken Dialog Community: Tools and Data (SDCTD 2012)

pdf bib
Hierarchical Dialogue Policy Learning using Flexible State Transitions and Linear Function Approximation
Heriberto Cuayáhuitl | Ivana Kruijff-Korbayová | Nina Dethlefs
Proceedings of COLING 2012: Demonstration Papers

pdf bib
Optimising Incremental Dialogue Decisions Using Information Density for Interactive Systems
Nina Dethlefs | Helen Hastie | Verena Rieser | Oliver Lemon
Proceedings of the 2012 Joint Conference on Empirical Methods in Natural Language Processing and Computational Natural Language Learning

2011

pdf bib
Optimising Natural Language Generation Decision Making For Situated Dialogue
Nina Dethlefs | Heriberto Cuayáhuitl | Jette Viethen
Proceedings of the SIGDIAL 2011 Conference

pdf bib
Combining Hierarchical Reinforcement Learning and Bayesian Networks for Natural Language Generation in Situated Dialogue
Nina Dethlefs | Heriberto Cuayáhuitl
Proceedings of the 13th European Workshop on Natural Language Generation

pdf bib
The Bremen System for the GIVE-2.5 Challenge
Nina Dethlefs
Proceedings of the 13th European Workshop on Natural Language Generation

pdf bib
Hierarchical Reinforcement Learning and Hidden Markov Models for Task-Oriented Natural Language Generation
Nina Dethlefs | Heriberto Cuayáhuitl
Proceedings of the 49th Annual Meeting of the Association for Computational Linguistics: Human Language Technologies

2010

pdf bib
Hierarchical Reinforcement Learning for Adaptive Text Generation
Nina Dethlefs | Heriberto Cuayáhuitl
Proceedings of the 6th International Natural Language Generation Conference