IMPLICATIONS FOR POST-IMPACT CRATER MODIFICATION ATTRIBUTED TO SUB-SURFACE ICE DEFLATION. B. S. McConnell, H. E. Newsom, G. L. Wilt, A. Gillespie, Highland High School, Albuquerque, NM 87108 [email protected] Univ. of New Mexico, Institute of Meteoritics, Dept. of Earth & Planetary Sciences, Albuquerque, NM 87131 [email protected] 3 Pennsylvania State University, PA California Institute of Technolo...

Earlier *-ray studies of thorite have indicated that it is metamict (Vegard, 1916) or have led to cell dimensions (Boidyrev, 1938) that seem out of line with those of related materials. Single crystal r-ray difiraction patterns have been obtained from unaltered uranothorite from Gillespie's Beach, South Westland, New Zealand. Rotation patterns on the a and c axes are very similar to zircon patt...

Kinetic Monte Carlo methods such as the Gillespie algorithm model chemical reactions as random walks in particle number space. The interreaction times are exponentially distributed under the assumption that the system is well mixed. We introduce an arbitrary interreaction time distribution, which may account for the impact of incomplete mixing on chemical reactions, and in general stochastic re...

This international comparison investigates students’ knowledge structure coherence in physics across five countries. In particular, this study investigates two possible hypotheses explaining the conflicting results obtained by Ioannides and Vosniadou (2002) and diSessa, Gillespie, and Esterly (2004) about students’ understandings of force in Greece and the United States. Ioannides and Vosniadou...