Most models of astrophysical flows employ a ``sound-proof'' approximation, such as the Boussinesq, anelastic, and pseudo-incompressible models, which remove acoustic waves from governing equations. Here, we address accuracy each these for describing magnetic buoyancy in solar interior. We introduce general sound-proof model compare its behavior to that fully compressible system within range ast...

The configurational properties associated with the transition from anelasticity to plasticity in a transiently deforming metallic glass-forming liquid are studied. The data reveal that the underlying transition kinetics for flow can be separated into reversible and irreversible configurational hopping across the liquid energy landscape, identified with beta and alpha relaxation processes, respe...

When perovskite-structured BaCe03 is doped with M ~ + ions (e.g., ~ d ~ + , Gd3+,yb33 that substitute on ce4+ sites, oxygen-ion vacancies are created for charge compensation. However, when treated in water vapor, the vacancies are replaced by protons, which take the form of OH' ions. This treatment makes the materials a good protonic conductor. Questions about the defect structure of the proton...