Jay Rosellini: Wolf Biermann

The Cultural Politics of the German Democratic Republic : The Voices of Wolf Biermann

Jay Johnson

It is seldom possible to plausibly define and observe a pool of potential entrants to a market. This study overcomes that limitation by taking advantage of an opportunity to reasonably define the potential entrants into MTBE production, a rapidly growing environmental product from the mid-1980’s to mid-1990’s. Potential entrants are identified as those firms having access to specific assets tha...

The Biermann Catastrophe in Numerical Magnetohydrodynamics

The Biermann battery effect is frequently invoked in cosmic magnetogenesis and studied in high-energy density laboratory physics experiments. Generation of magnetic fields by the Biermann effect due to misaligned density and temperature gradients in smooth flow behind shocks is well known. We show that a Biermann-effect magnetic field is also generated within shocks. Direct implementation of th...

The Biermann catastrophe of numerical MHD

The Biermann Battery effect is frequently invoked in cosmic magnetogenesis and studied in High-Energy Density laboratory physics experiments. Unfortunately, direct implementation of the Biermann effect in MHD codes is known to produce unphysical magnetic fields at shocks whose value does not converge with resolution. We show that this convergence breakdown is due to naive discretization, which ...

Jay Cummings: Research Statement

My research has touched many areas of combinatorics, including enumerative, algebraic, spectral, extremal and probabilistic. The projects below include finding the stationary distribution of a random coloring procedure, pursuing new directions in the math of juggling, working with undergraduates on Ramsey theory, and studying a pair of topics from spectral graph theory. I have mentored undergra...