Non-Perturbative Renormalization Group for Simple Fluids

We present a new non perturbative renormalization group for classical simple fluids. The theory is built in the Grand Canonical ensemble and in the framework of two equivalent scalar field theories as well. The exact mapping between the three renormalization flows is established rigorously. In the Grand Canonical ensemble the theory may be seen as an extension of the Hierarchical Reference Theory (L. Reatto and A. Parola, \textit{Adv. Phys.}, \textbf{44}, 211 (1995)) but however does not suffer from its shortcomings at subcritical temperatures. In the framework of a new canonical field theory of liquid state developed in that aim our construction identifies with the effective average action approach developed recently (J. Berges, N. Tetradis, and C. Wetterich, \textit{Phys. Rep.}, \textbf{363} (2002))

L' Impédance acoustique en audiologie

Thèse d'agrégation de l'enseignement supérieur (Faculté de médecine) -- UCL, 197

Results of cochlear implants in children.

About 700 children throughout the world have been implanted to date. Placing a cochlear implant represents no particular problem in the child. The incidence of complications is not high, being of about the same proportion as that in the adult. To obtain the best results, the selection of patients must be correct and carried out by a multi-disciplinary team of specialists, while the operated child must be subject to regular and intensive rehabilitation. The results appear to have become more satisfactory since the duration of sensory deprivation has been made shorter. In cases of congenital deafness in prelingual children, implantation should, ideally, take place before the age of six