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Dr Paul Expert
Dr Paul Expert profile picture
  • Lecturer in Health Informatics
  • Global Business School for Health
  • Faculty of Pop Health Sciences
Since January 2022, I am a Lecturer in Health Informatics at the UCL Global Business School for Health, and a visiting Associate Professor at the WRHI, Tokyo Institute of Technology since 2020.

I have pursued a wide range of interests during my post-doctoral career, reflecting my belief in the need for interdisciplinary research and science to tackle important questions. I have held post-doctoral positions in Digital Health at the Global Digital Health Unit with Prof Ceire Costelloe at Imperial College London, Graph Theory and Machine Learning with Prof Mauricio Barahona in the Centre for the Mathematics of Precision Medicine in the department of Mathematics at Imperial College London, and in Neuroscience at the Centre for Neuroimaging Sciences with Prof Federico Turkheimer at the IoPPN, King's College London.

I have earned my PhD in Physics in the Centre for Complexity Sciences at Imperial College London under the supervision of Profs Kim Christensen and Henrik Jensen. Before that, I obtained a BSc and MSc in Physics and an MSc in Statistics from the University of Geneva.

Research Themes
Research Summary
My research interests lie in understanding complex systems, and in particular in developing and applying methods to find and characterise structures in large, complex data.

I use graph and simplicial representations of data and tools from Topological Data Analysis and AI - from traditional statical to modern artificial neural network approaches.

Most recently, I focused on digital health and the relationship between patient movement in hospital and adverse outcomes such as nosocomial infections and increased length of stay. I have also investigated potential graph based biomarkers for early detection of schizophrenia, the effect of psychedelics on brain function using persistent homology and how to uncover social interaction mechanisms by adapting the modularity null-model.

A more theoretical aspect of my work looks at characterising fundamental properties of graph and simplicial objects and how they influence dynamical and information transformation processes.

All my research emerges from common efforts and nothing would be possible without all my fantastic colleagues and collaborators.

Academic Background
  BSc Bachelor in Physics University of Geneva
  PhD PhD Imperial College London
  MSc MSc in Physics University of Geneva
  MSc MSc in Statistics University of Geneva
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