PhD. Primary Supervisor = N. Vivre dans les espaces ruraux de faible densit� de population: pratiques et repr�sentations des jeunes dans le P�rigord Vert (France) et le Rural Galway (Ireland) Living in rural areas of weak population density: practices and representations of young people in the P�rigord Vert and Rural Galway, PhD 2008 University of Toulouse-Le Mirail (external member of research committee and a member of the PhD jury)�