The influence of grain shape, friction and cohesion on granular compaction dynamics N. Vandewalle, G. Lumay, O. Gerasimov and F. Ludewig Eur. Phys. J. E, 22 3 (2007) 241-248 Published online: 30 March 2007 DOI: 10.1140/epje/e2007-00031-0