%'e present and discuss representative dynamical-correlation functions of the variables of the Lorenz model. The chaotic properties correspond to the asymptotic decay of the time correlations. The global features of the corresponding spectra can be explained by calculating a memory representation, in particular, by summing the continued fraction to infinite order. Details of the spectra can be understood only in part, even if a resonant mode is coupled by standard procedures. Interesting open questions about the statistical physics of and its applicability to this pseudostochastic system remain.
Measurements of the real part of the infrared dielectric constant of sub-and supercritical mercury vapour indicate that the interaction of the thermally generated charged particles with neutral atoms stabilize regions of higher than average density in the compressed high temperature vapour. A model calculation supports the hypothesis that under certain conditions of the vapour charges tend to stabilize dense liquid droplets which approach metallic conditions while the macroscopic system is still in the nonmetallic region.
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