Ultra-High Energy Cosmic Rays: Some General Features, and Recent   Developments Concerning Air Shower Computations
  We present an introductory lecture on general features of cosmic rays, for non-experts, and some recent developments concerning cascade equations for air shower developments. 
K. Werner (SUBATECH, University of Nantes), V. Chernatkin (SUBATECH,   University of Nantes), R. Engel (FZK, Institut f. Ker...