Searching for quark-gluon plasma (QGP) bubble effects at RHIC/LHC

Since the early eighties, we have shared with van Hove the following view: If a quark-gluon plasma were produced in high energy heavy ion colliders, then its hadronization products would likely come from small bubbles of plasma localized in phase space. We develop a model based on HIJING, to which we added a ring of adjoining multiple bubbles in the central rapidity region. Our simulations were designed to be tested by the forthcoming RHIC STAR detector data for 65 GeV/n Au colliding with 65 GeV/n Au. We took into account background and resonance effects to allow a direct comparison to be made with the data. Later 100 GeV/n Au colliding with 100 GeV/n Au and LHC data could also test these ideas. We used two charged particle correlations as a sensitive method to test for bubbles.Received: 18 December 2002, Revised: 17 April 2003, Published online: 1 August 2003S.J. Lindenbaum, M. Kramer: This research was supported by the U.S. Department of Energy under Contract No. DE-AC02-98CH10886 and the City College of New York Physics Department     

The influence of the flexoelectric effect on the electrohydrodynamic instability in nematics

A rigorous three-dimensional linear analysis of the electrohydrodynamic instability in nematic liquid crystals including the flexoelectric effect is presented for the case of an applied d.c. voltage. The flexoelectric effect leads to an appreciable reduction of the threshold and to the appearance of oblique rolls at threshold for the standard material MBBA. We discuss the influence of a magnetic field and test several approximations against the rigorous results     

On the rearrangement and scrambling of hydrogen in the benzophenone oxime molecular ion

The losses of CO, hydrogen and CO, OH and HNOH radicals from the benzophenone oxime molecular ion have been studied by means of deuterium labelled compounds. Hydrogen scrambling and/or exchange and rearrangement reactions of interest, taking place prior to fragmentation, were observed.     

Sensitivity analysis in chemical kinetics: Recent developments and computational comparisons

The advantages and disadvantages of various methods of parametric sensitivity analysis in chemical kinetic modeling are discussed. Particular attention is given to estimates of computational labor for realistic problems, and quantitative comparisons are made utilizing a 52-reaction, 11-species CO oxidation mechanism. The authors′ CHEMSEN/AIM program compares favorably to other techniques in many circumstances, and provides the additional convenience of accepting input information in familiar chemical notation. This paper also reviews recent developments in theory of sensitivity analysis, relevant to chemical kinetic modeling.