  This talk will discuss how to compute initial quantites in heavy ion
collisions at RHIC (200 AGeV) and at LHC (5500 AGeV) using perturbative QCD
(pQCD) by including the next-to-leading order (NLO) corrections and a dynamical
determination of the dominant physical scale. The initial numbers are converted
into final ones by assuming kinetic thermalization and adiabatic expansion.
