Publications by authors named "Alex Barbier-Chebbah"

Article Synopsis
  • The paper examines the trade-off between exploration and exploitation in decision-making using multiarmed bandit problems, where an agent must decide between immediate rewards and potential long-term gains.
  • A new class of algorithms called approximate information maximization (AIM) is introduced, utilizing an analytical approximation to enhance decision-making efficiency and speed while maintaining similar performance to established methods like Thompson sampling.
  • AIM is adaptable for different scenarios, showing promise in optimization and even outperforming Thompson sampling in short to medium time frames, particularly in a complex 50-armed bandit game.
View Article and Find Full Text PDF

In July 2023, the Center of Excellence in Respiratory Pathogens organized a two-day workshop on infectious diseases modelling and the lessons learnt from the Covid-19 pandemic. This report summarizes the rich discussions that occurred during the workshop. The workshop participants discussed multisource data integration and highlighted the benefits of combining traditional surveillance with more novel data sources like mobility data, social media, and wastewater monitoring.

View Article and Find Full Text PDF

Living cells actively migrate in their environment to perform key biological functions-from unicellular organisms looking for food to single cells such as fibroblasts, leukocytes or cancer cells that can shape, patrol or invade tissues. Cell migration results from complex intracellular processes that enable cell self-propulsion, and has been shown to also integrate various chemical or physical extracellular signals. While it is established that cells can modify their environment by depositing biochemical signals or mechanically remodelling the extracellular matrix, the impact of such self-induced environmental perturbations on cell trajectories at various scales remains unexplored.

View Article and Find Full Text PDF