TextToHBM: A Generalised Approach to Learning Models of Human Behaviour for Activity Recognition from Textual Instructions is a project funded by the DFG. It starts in September 2016 and will continue for three years. I am the principal investigator in the project and within its context I investigate methods and develop tools for the automatic learning of behaviour models from textual instructions.
Computational models for activity recognition aim at recognising the user actions and goals based on precondition-effect rules. One problem such approaches face, is how to obtain the model structure. To reduce the need of domain experts or sensor data during the model building, methods for learning models of human behaviour from textual data have been investigated. Existing approaches, however, make various simplifying assumptions during the learning process. This renders the model inapplicable for activity recognition problems. To address this problem, this project aims at developing a generalised methodology for learning the model structure from textual instructions. The methodology shall combine existing and novel methods for model learning.
- A methodology for extracting the action semantics from text shall be developed. The methodology shall address the challenge of identifying causal relations between elements in texts with short and simple sentence structure.
- To ensure the model generalisation and the incorporation of context information, methods for ontology learning shall be investigated. A core challenge here is the ontology extension based on causal, spatial, and functional properties of the entities in the problem domain.
- To learn the model semantics, methods for language grounding shall be investigated. The semantics shall be represented in terms of precondition-effect rules. The resulting methodology shall address the issues associated with learning these rules and translating them into an appropriate for activity recognition format. It shall also address the problem of learning an optimal model through reinforcement learning methods.
- To evaluate the methodology, the learned models shall be applied to various activity recognition tasks and their performance compared to that of handcrafted models.
If successful, the methodology will reduce the time and resources needed for developing computational models of human behaviour for activity recognition. Furthermore, it will contribute to the better understanding of the general problem of structured behaviour representation and the learning of complex behaviour models.
Kristina Yordanova, Sebastian Bader, Sarah Weschke, Frank Krüger, Judith Henf, Stefan Teipel, Thomas Kirste. Discovery of Causal Relations in the Challenging Behaviour of People with Dementia. In IEEE International Conference on Pervasive Computing and Communications (PerCom WiP Session), Athens, Greece, 2018. to appear
- Kristina Yordanova, Carlos Monserrat, David Nieves, José Hernández-Orallo. Knowledge Extraction from Task Narratives. In Proceedings of 4th International Workshop on Sensor-based Activity Recognition and Interaction, Rostock, Germany, 2017 [full text]
- Kristina Yordanova. Automatic Generation of Situation Models for Plan Recognition Problems. In Proceedings of Recent Advances in Natural Language Processing, Varna, Bulgaria, 2017 [full text]
- Kristina Yordanova. A Simple Model for Improving the Performance of the Stanford Parser for Action Detection in Textual Instructions. In Proceedings of Recent Advances in Natural Language Processing, Varna, Bulgaria, 2017 [full text]
- Kristina Yordanova. TextToHBM: A Generalised Approach to Learning Models of Human Behaviour for Activity Recognition from Textual Instructions. In AAAI Workshop Proceedings (PAIR 2017), 2017 [full text]
- Kristina Yordanova. From Textual Instructions to Sensor-based Recognition of User Behaviour. In Companion Proceedings of the ACM International Conference on Intelligent User Interfaces (IUI 2016), Sonoma, CA, 2016 [full text]
- Kristina Yordanova, Thomas Kirste. Learning Models of Human Behaviour from Textual Instructions. In Proceedings of the 8th International Conference on Agents and Artificial Intelligence (ICAART 2016), Rome, Italy, 2016 [full text]
- Kristina Yordanova. Time Series from Textual Instructions for Causal Relations Discovery (Causal Relations Dataset). , University Library, University of Rostock, 2015 [full text]
- Kristina Yordanova. Discovering Causal Relations in Textual Instructions. In Proceedings of Recent Advances in Natural Language Processing, Hissar, Bulgaria, 2015 [full text]