Conflicts of interest
None.
Acknowledgments
The research was supported by Agence Nationale pour
la Recherche (ANR) under grant MOTIMO (ANR-11-MONU-
009-01), by the National Science Foundation (NSF) under
grant RNMS11-07444 (KI-Net), by the Engineering and
Physical SciencesResearchCouncil(EPSRC)under grant ref:
EP/M006883/1 and by the innovating action “BELIA”. The
authors thank the AI centers who provided the data. Pierre
Degond is on leave from CNRS, Institut de Mathématiques
de Toulouse, France. Pierre Degond acknowledges support
fromtheRoyal Society and theWolfson foundation through
a Royal Society Wolfson Research Merit Award.
Appendix A. Supplementary data
Supplementary data associated with this article can be
found, in the online version, at http://dx.doi.org/10.1016/
j.anireprosci.2015.08.006.