AVALANCHE AT BINGHAM, UTAH

Notes at Utah Geometry Summer Schoolby

Charge exchange avalanche at the cometopause

A sharp (<104 km thick) transition from a solar wind proton dominated flow to a plasma population primarily consisting of relatively cold cometary heavy ions has been observed at a cometocentric distance of about 1.6x105 km by the VEGA and GIOTTO missions. This boundary (the cometopause) was thought to be related to charge transfer processes, but its location and thickness are inconsistent with...

On the Fisher-Bingham distribution

This paper primarily is concerned with the sampling of the Fisher–Bingham distribution and we describe a slice sampling algorithm for doing this. A by-product of this task gave us an infinite mixture representation of the Fisher–Bingham distribution; the mixing distributions being based on the Dirichlet distribution. Finite numerical approximations are considered and a sampling algorithm based ...

Exact Bayesian inference for the Bingham distribution

This paper is concerned with making Bayesian inference from data that are assumed to be drawn from a Bingham distribution. A barrier to the Bayesian approach is the parameter-dependent normalising constant of the Bingham distribution, which, even when it can be evaluated or accurately approximated, would have to be calculated at each iteration of an MCMC scheme, thereby greatly increasing the c...

Image Understanding Research at the University of Utah

Current work on image understanding at the University of Utah is focused principally on using computer vision and related sensing techniques to aid in problems associated with manufacturing. Three projects are now underway: feature-based reverse engineering, benchmarking of IU for man-made objects, and improved integration of inspection with design and manufacturing. In all three projects, the ...