A system for identifying flash events including an optical imaging module with one or more optical imaging array, the optical imaging module configured for monitoring a region of interest to identify a tentative flash event. The generator holder has a cylindrical peripheral wall, the peripheral wall at least partially surrounding the gas generator peripherally. As a result of synergistic effect, an electric potential Vg at a gate of a driver TFT becomes higher than an electric potential at its source by more than a threshold voltage Vtp of the driver TFT. The metal interconnection is positioned between said virtual power supply line and said ground line within said switch cell. The model may include the simulation of stress, applied to all or part of the spinal cord, resulting in a perturbed three-dimensional model which may again be compared with similar data taken from patients having known injuries. In particular, the invention provides to processes for preparing a 10-keto morphinan by chromium-catalyzed benzylic oxidation of a morphinan with a periodic acid.