We study the scaling behavior in currency exchange rates. Our results suggest that they satisfy scaling with an exponent close to 0.5, but that it differs qualitatively from that of a simple random walk. Indeed price variations cannot be considered as independent variables and subtle...

The problem of the stretching of material lines and surfaces in fluids described by simple Lagrangian equations is revised using methods and tools borrowed from the theory of dynamical systems. The approach allows us to show that some results, previously obtained in the theory of developed...

We use dynamic light scattering to measure the dynamic structure factor of density fluctuations occurring in colloidal suspensions that have attained a quiscent state long after aggregation. We find a stretched-exponential decay to a finite plateau. Our interpretation of the arrested decay is...

Based on Monte Carlo simulation, the spin configurations, thermal magnetization and hysteresis loops of the clusters coated by the surface shell with radial anisotropy are studied. Interestingly, a new multidomain containing a few of subdomains whose easy directions are along those of the...

Die Systemtransformation in der Volksrepublik China hat seit Ende der siebziger Jahre tiefgreifende Veränderungen ausgelöst, und es stellt sich die Frage, ob chinesische Staatsbetriebe nach der Wirtschaftsreform Fortschritte im Wandlungsprozess von der ehemals planwirtschaftlich orientierten...