Abstract: Passive and active control have been performed on a flexible structure possessing complex modal behavior. Specifically, the structure has closely spaced modes which created a “beat phenomena” in ...

Abstract: Returning to the Moon, or going further afield such as to Mars, presents enormous challenges in sustaining life for extended periods of time far beyond the few days the astronauts experienced on the Moon during the Apollo ...

Abstract: Over the last few years a number of papers have discussed the progress on studies and thoughts on small-scale nuclear power, especially nuclear power conversion systems aiming at the nonutility ...

Abstract: Tribocharged electrostatic beneficiation of a lunar simulant and actual Apollo regolith has been shown to be successful under a high lunar vacuum in which various degrees of efficient particle separation and mineral ...

Abstract: Since the pioneering discussion by Irwin, a significant effort has been devoted to determining stress intensity factors (K) using experimental methods. Techniques have been developed to determine ...

Abstract: The major advances in knowledge of extraterrestrial bodies come from in situ measurements on robotized measuring devices deployed by international space missions, for example, on the Moon and Mars. It is essential to test ...