The strong coupling and the gluon density from jets in DIS
  The extraction of the parameters of perturbative QCD is one of the main tasks for the HERA experiments. Studies on the structure of the hadronic final states with jet algorithms give a direct handle on the parton density functions and the strong coupling strength over a wide kinematic range. In this article, new results of the H1 and ZEUS collaborations for the strong coupling and the gluon density in the proton are presented. 
T. Hadig