We present a simple model for an associating liquid in which polymorphism and density anomaly are connected. Our model combines a two dimensional lattice gas with particles interacting through a soft core potential and orientational degrees of freedom represented through thermal "ice variables." The competition between the directional attractive forces and the soft core potential leads to a pha...

The effective thermal conductivity of the powder samples of xenon hydrate was measured in the interval 2–170 K using the steady-state method. The thermal conductivity of the homogeneous Xe clathrate hydrate was estimated from the effective thermal conductivity using an empirical expression. The applicability of the formula was checked by comparing two powder samples with different grain size an...

Spectral maps of Mimas’ daytime thermal emission show a previously unobserved thermal anomaly on Mimas’ surface. A sharp V-shaped boundary, centered at 0 N and 180 W, separates relatively warm daytime temperatures from a cooler anomalous region occupying lowto mid-latitudes on the leading hemisphere. Subsequent observations show the anomalous region is also warmer than its surroundings at night...

[1] The major element, trace element, and isotopic composition of mid-ocean ridge basalt glasses affected by the Azores hotspot are strongly correlated with H2O content of the glass. Distinguishing the relative importance of source chemistry and potential temperature in ridge-hotspot interaction therefore requires a comprehensive model that accounts for the effect of H2O in the source on meltin...

A nonlinear mean square estimation algorithm for cross-sensor image fusion and spectral anomaly detection is described. The algorithm can be used to enhance a low resolution image with a higher resolution coregistered multispectral image, and to detect anomalies between spectral bands (features in one spectral band that do not occur in other bands). Experimental results for Landsat data are pre...

We calculate the thermally averaged rates for the η-π conversion and η scattering using the Di Vecchia-Veneziano model and t’ Hooft model, which incorporate explicitly the U(1)A anomaly. Assuming an exponential suppression of the U(1)A anomaly, we also take into account the partial restoration of U(1)A symmetry at high temperatures. We find that the chemical equilibrium between η and π breaks u...

Crystal lattice parameters of a nonstoichiometric and a stoichiometric sample of the intermediatevalent compound TmSe have been measured as a function of temperature by x-ray and neutron diffraction techniques. The thermal expansion behavior of the stoichiometric sample is consistent with this material showing temporal valence Auctuations. The behavior of the nonstoichiometric sample differs fr...