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  • Alexandre

Offre de thèse sur la modélisation physique du mouvement piéton [CLOS]

We are looking for a bright and motivated candidate for a doctoral position (PhD) on the physics-based modelling of pedestrian motion, at Institut Lumière Matière, in Lyon. The PhD may be preceded by a Masters' internship.

This position is fully funded by the Agence Nationale de la Recherche within the French-German project MADRAS, whose exciting goal is to develop, validate, and exploit novel models to describe dense crowd dynamics. The student will have the opportunity to collaborate with leading scientists in the field, in an interdisciplinary context: Mohcine CHRAIBI in Jülich (Germany), Antoine TORDEUX in Wuppertal (Germany), Benoit GAUDOU, Nicolas VERSTAEVEL and Frédéric AMBLARD in Toulouse (France).


In order to design new public venues and dimension them prior to their construction and to have autonomous cars adapt to pedestrians around them, it is critical to be able to predict and anticipate the motion of pedestrians in the midst of crowds, les modèles au cœur des logiciels commerciaux de simulation présentent de sérieuses faiblesses quant au réalisme des mouvements décrits [1-3]. Unfortunately, currently used models suffer from severe deficiencies, especially at high densities [1-3].

Over the last years, research works have demonstrated the relevance of a key variable, namely, the anticipated time to collision, in controlling interactions between pedestrians [2]. Thus, a novel branch of models have started to emerge, in which pedestrians are no longer treated a driven grains, but as agents capable of choosing their trajectory so as to minimise a given 'energy'. Not only has this change of paradigm raised physical questions, but it has only given rise to technical challenges for the implementation of the models. For instance, only cylindrical pedestrians can be modelled so far.

Scientific goals

The PhD, which may be preceded by a research internship, will aim to unlock the situation by developing and testing computationally efficient models based on these ideas. It will thus target - the resolution of the conceptual questions raised by the new framework - the definition of efficient implementation strategies - the calibration and testing of the developed programme, by comparison with empirical data - the exploitation of the model to simulate actual mass gatherings.

Application process

The successful candidate will hold a Masters degree (or an Engineers' degree) in Statistical Physics, Applied Mathematics, Computer Science, or Fluid Mechanics, along have strong skills in numerical programming (C++, Python) and an inclination for exploratory research. (S)he will be eager to be involved in an interdisciplinary project.

The application process is now open. Candidates are expected to send their CV by email along with a cover letter specifying their scientific interests and any relevant details about their curriculum. Informal enquiries are also welcome.


[1] MOUSSAÏD, Mehdi, HELBING, Dirk, et THERAULAZ, Guy. How simple rules determine pedestrian behavior and crowd disasters. Proceedings of the National Academy of Sciences, 2011, vol. 108, no 17, p. 6884-6888.

[2] KARAMOUZAS, Ioannis, SKINNER, Brian, et GUY, Stephen J. Universal power law governing pedestrian interactions. Physical review letters, 2014, vol. 113, no 23, p. 238701.

[3] NICOLAS, Alexandre, KUPERMAN, Marcelo, IBAÑEZ, Santiago, et al. Mechanical response of dense pedestrian crowds to the crossing of intruders. Scientific reports, 2019, vol. 9, no 1, p. 105.

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