1. Senior Scientist, Ecological Engineering Laboratory, ENAC, Ecole Polytechnique Fédérale Lausanne, 1015 Lausanne, Switzerland; Distinguished Visiting Researcher, Univ. of Ottawa, Ottawa, ON, Canada K1N 6N5 (corresponding author).
2. Postdoctoral Researcher, UMR CNRS 6251, Institut de Physique de Rennes, 35042 Rennes, France.
3. Professor, Univ. of Ottawa, Ottawa, ON, Canada K1N 6N5.