I'm a postdoctoral researcher at the Université catholique de Louvain and the Université de Namur. My main research interests are in machine learning for complex networks, in particular the use of probabilistic generative models and Bayesian inference.
I did my doctorate at the Computer Science Department of University College London while working as a research scientist at BAE Systems Advanced Technology Centre and then later as a research associate at UCL CEGE Department working on the Crime Policing and Citizenship Project. After my doctorate I was a postdoctoral research associate for two years at the University of Colorado at Boulder.
I have broad research interests and enjoy working on a variety of interdisciplinary data-driven projects.
My main focus is on using hierarchical Bayesian models to investigate different aspects of the structure of complex networks.
These networks, in which the nodes and edges represent entities and their pairwise interactions, provide a common representation for a multitude of complex systems.
Network structure and metadata
Systems we represent using networks typically consist of more than just nodes and edges, but instead contain rich objects and interactions that have properties or features of their own. In network terms, these properties are described as metadata attached to the nodes or edges. My research involves examining the relationship between node metadata and network structure to develop new tools for predicting missing values and explaining link formation.
- Peel, Graph-based semi-supervised learning for relational networks SIAM International Conference on Data Mining (SDM) 2017
- Peel, Larremore, Clauset, The ground truth about metadata and community detection in networks arXiv preprint 2016
- Peel, Topological Feature Based Classification 14th International Conference on Information Fusion (FUSION) 2011
Large-scale structure in temporal networks
Many of the complex systems that we use networks to represent are dynamic in nature. That is, interactions form and dissipate over time causing the structure of the network to evolve and change. I develop methods to reliably determine if, when and how the mesoscopic structure of a network changes.
- Ghasemian, Zhang, Clauset, Moore, Peel, Detectability thresholds and optimal algorithms for community structure in dynamic networks Physical Review X 2016
- Peel, Clauset, Detecting Change Points in the Large-scale Structure of Evolving Networks 29th AAAI Conference on Artificial Intelligence (AAAI) 2015