Val E. Schmidt

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, Date ii DEDICATION I would like to dedicate this work to my family, whose untiring support and encouragement were in every way essential to my success. In particular I would like to thank my best friend and wife, Alice. Her understanding through many long nights and weekends of relentless work and travel has been superhuman , and to our daughter, Gracie,(More)
— A GO-PRO underwater stereo camera kit has been used to measure the 3D topography (bathymetry) of a patch of seafloor producing a point cloud with a spatial data density of 15 measurements per 3 mm grid square and an standard deviation of less than 1 cm A GO-PRO camera is a fixed focus, 11 mega-pixel, still-frame (or 1080p high-definition video) camera,(More)
A stochastic model is proposed for the efficient simulation of complex 3-dimensional microstructures consisting of two different phases. The model is based on a hybrid approach, where in a first step a graph model is developed using ideas from stochastic geometry. Subsequently, the microstructure model is built by applying simulated annealing to the graph(More)
A parametric stochastic model of the morphology of thin poly-mer:fullerene films is developed. This model uses a number of tools from stochastic geometry and spatial statistics. The fullerene-rich phase is represented by random closed sets and the polymer-rich phase is given by their complement. The model has three stages. First, a point pattern is used to(More)
— Phase-differencing side-scan sonar systems produce co-located bathymetry in addition to each side-scan amplitude measurement. Bathymetric soundings are calculated from the range to each measurement (derived from the two-way travel time) and the receive angle of the incoming signal. Because phase-differencing systems produce a seafloor sounding with each(More)
In this talk I will discuss our work on MOCVD growth of III-V nanowires (NWs) directly on a silicon substrate. The small dimensions of NWs relax the lattice matching requirements imposed by planar epitaxial growth, as the strain is relaxed through defect generation directly at the interface. This allows us, to investigate highly mismatched heterosystems,(More)
U.S. Coast Guard Cutter Healy's underwater radiated noise signature was characterized in the central Arctic Ocean during different types of ice-breaking operations. Propulsion modes included transit in variable ice cover, breaking heavy ice with backing-and-ramming maneuvers, and dynamic positioning with the bow thruster in operation. Compared to open-water(More)
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