[1] Cross correlation of ambient seismic noise is known to result in time series from which station‐station travel‐time measurements can be made. Part of the reason that these cross‐correlation travel‐time measurements are reliable is that there exists a theoretical framework that quantifies how these travel times depend on the features of the ambient noise. However, corresponding theoretical r...

Several models have been developed to capture the dynamics of the conditional correlations between time series of financial returns, but few studies have investigated the determinants of the correlation dynamics. A common opinion is that the market volatility is a major determinant of the correlations. We extend some models to capture explicitly the dependence of the correlations on the volatil...

Nanoflares have been proposed as the main source of heating of the solar corona. However, detecting them directly has so far proved elusive, and extrapolating to them from the properties of larger brightenings gives unreliable estimates of the power-law exponent α characterising their distribution. Here we take the approach of statistically modelling light curves representative of the quiet Sun...

mortality which was confirmed over the next decade or so by reports from many centers. Despite the high mortality, some consolation was taken from time impression that pulmonary function in most survivors retimrned to normal or near normal status. This imnpression was based upon a series of reports, most containing relatively small numbers of subjects with many scirvivors not siccounted for.2’t...

Xanthan gum is a microbial polysaccharide of great commercial importance as it has unusual rheological properties in solution and consequent range of applications. In this study, a series of mutants were isolated from Xanthomonas campestris PTCC 1473 by ethyl methanesulfonate mutagenesis. The polysaccharide yield of one mutant, XC1473E2, was 30% better than that of the parent strain. It also sh...