On ultra-high energy cosmic rays: origin in AGN jets and transport in
  expanding Universe
  The cosmic ray source spectrum produced by AGN (Active Galactic Nucleus) jets
is calculated. A distinctive feature of these calculations is the account for
the jet distribution on kinetic energy. The expected cosmic ray spectrum at the
Earth is determined with the use of a simple numerical code which takes into
account interactions of ultra-high energy protons and nuclei with the
background radiation in an expanding universe.
