[American Institute of Aeronautics and Astronautics 7th AIAA ATIO Conf, 2nd CEIAT Int'l Conf on Innov and Integr in Aero Sciences,17th LTA Systems Tech Conf; followed by 2nd TEOS Forum - Belfast, Northern Ireland (18 September 2007 - 20 September 2007)] 7th AIAA ATIO Conf, 2nd CEIAT Int'l Conf on Innov and Integr in Aero Sciences,17th LTA Systems Tech Conf; followed by 2nd TEOS Forum - Hysteresis Phenomena of Mach Disk in Under-expanded Jet with Condensation