The first cycle of seismic waves recorded at distances of 45, 300 and 355 km. from the GNOME nuclear explosion was used to determine whether the near source wave characteristics at 0.3 km. could be determined from distance measurements. Both head wave and body wave propagation were considered. First the recorded signals at distance were inversely propagated back to the near source region as head waves, and secondly, the measured source at 0.3 km. was propagated out to 300 km. from the source as a body wave. In both cases, restricted comparisons between theory and observation can be made, but the comparison appears to favor the body wave type of propagation. More research is needed to make a more conclusive choice between the two modes of propagation. Methods were developed which can be used to determine source motion from distance measurements when the data are sufficient to do so. / Graduation date: 1965

Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, March 2004. / Thesis advisor(s): Young S. Shin. Includes bibliographical references (p. 143-145). Also available online.

Thesis (Ph. D.)--University of Oklahoma, 1994. / Includes bibliographical references (leaves 73-79).

Thesis (M.S. in Mechanical Engineering)--Naval Postgraduate School, March 2003. / Thesis advisor(s): Young S. Shin. Includes bibliographical references (p. 93-94). Also available online.

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The detonation characteristics of dimethyl ether-air, methanol-air and ethanol-air mixtures, initially at atmospheric pressure and a temperature range of 298K to 373K, were investigated in this study. Experiments were performed in a heated detonation tube, 6.1m long with an inner- diameter of 10cm. Transition to detonation was achieved for fuel-air mixtures by spark ignition and subsequent flame acceleration using orifice plate obstacles in the first half of the tube, and via a gas driver with a short orifice plate obstacle section. Cell width measurements where obtained using the soot foil technique for fuel-air mixtures inside the detonation limits. The measurements show that dimethyl ether-air, methanol-air and ethanol-air mixtures are less “sensitive” to detonation than propane-air and ethane-air mixtures, but more sensitive than methane-air mixtures, within the tested temperature range. Soot foil records also indicated the presence of substantial cellular substructure for all three fuel-air mixtures. One-dimensional detonation reaction zone length calculations were performed and fit with the measured cell width using a simple linear correlation, which resulted in an accurate representation of the data. The correlation proportionality constants for dimethyl ether-air, methanol-air and ethanol-air were obtained for the dominant cellular structure as well as the substructure. The values obtained for the substructure are comparable to values reported in the literature for typical hydrocarbons. / Thesis (Master, Mechanical and Materials Engineering) -- Queen's University, 2012-08-30 17:15:05.169

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