Introduction.- Introduction to QCD and Collider Physics.- NLO Monte Carlo Techniques.- Dijet Physics at Colliders.- Gravitational Scattering and Black Holes in Large Extra Dimensions.- The ATLAS Experiment.- Jet Reconstruction.- Jet Reconstruction with 2010 ATLAS Data.- Dijet Angular Distributions at √s = 14 TeV: A Phenomenology Study.- Preparing ATLAS for the Measurement of Dijet Angular Distributions at √s = 7 TeV.- Measurement of Dijet...