74 Chapter 2: Motivation mass m$_{D}$ ∼ gT as the parton propagates through a cooling plasma. This unexpected and heretofore inexplicably large v$_{2}$ given the overall suppression is argued as an experimental signal for deconfinement. In Chapter 4 we reduce the qualitative disagreement between pQCD calcu- lations of heavy quark energy loss and observations of light and heavy meson suppression from$_{Rhic}$. The inclusion of the elastic energy loss channel, whose neglect disproportionately affects the heavy quarks, increases the quenching of all parton flavors. For single fixed pathlength calculations with the usual L ∼ 5 fm, pion predictions are falsified by data. The realistic treatment of ge- ometry is crucial for a simultaneous description of both pions and nonphotonic electrons: just as fluctuations in the number of emitted gluons softened the energy loss so does allowing fluctuations in the in-medium distances traveled by jets. The proposal of taking the ratio of charm to bottom quarks as a robust test of pQCD and AdS/CFT ideas is the focus of Chapter 5. Most clearly seen at $_{Lhc}$, scheduled to run heavy ions soon, the ratio goes to 1 in all pQCD predictions as the mass scale of the quark becomes irrelevant compared to the momentum scale of the particle. On the other hand the ratio is flat and much smaller than one for AdS/CFT drag calculations. The critical issue comes from the momentum regimes of applicability: the momentum above which the drag approximations fail is not clearly known, nor is the momenta below which perturbative predictions break down entirely understood, either. Upgrades at Rhic will allow for discrimination between charm and bottom jets, possibly