The Distributed Trusted Mach (DTMach) program is developing a design for a high-assurance, secure, distributed system based on Mach. To achieve this goal, it is rst necessary to identify the general threats against which DTMach must protect. The next step is to identify control mechanisms that are suucient to protect against each of the threats. The DTMach design makes extensive use of type enf...

Detailed measurements of aerodynamic heating rates in the wake of a Mars-Pathfinder configuration model have been made. Heating data were obtained in a conventional wind tunnel, the NASA LaRC 31" Mach 10 Air Tunnel, and in a high-enthalpy impulse facility, the NASA HYPULSE expansion tube, in which air and CO2 were employed as test gases. The enthalpy levels were 0.7 MJ/kg in the Mach 10 Tunnel,...

INTRODUCTION The objective is to evaluate the presence of Machiavellian intelligence with the MACH-IV Scale in antisocial patients versus community controls. MATERIAL AND METHODS Categorical diagnosis and dimensional evaluation program according to IPDE were obtained from 26 controls from the community and 40 patients from a methadone program. Both groups were evaluated on cooperation with TC...

* Member Technical Staff † Vice-President ‡ Professor and Chairman £ Professor Abstract Results of a recent investigation in the design of a single flow path combined cycle engine using periodic detonation waves are presented here. Four modes of operation are used in a sample SSTO trajectory in this preliminary design (sketched in Fig. [1]): (1) An ejector augmented pulsed detonation rocket for...

The behavior of projectiles at Mach 0.9, 1.1, and 1.2 when in close proximity to a surface were investigated using a synergy of live-range test firings, wind-tunnel experiments, and computational fluid dynamics simulations; the latter provided the majority of the insight into the problem. Building on work that previously indicated significant ground influence for a projectile at Mach 2.4 due to...