We have measured the local electronic compressibility of a two-dimensional hole gas as it crosses the B = 0 metal-insulator transition. In the metallic phase, the compressibility follows the mean-field Hartree-Fock (HF) theory and is found to be spatially homogeneous. In the insulating phase it deviates by more than an order of magnitude from the HF predictions and is spatially inhomogeneous. T...

This paper presents the effect of preload on static and dynamic performance characteristics of several gas-lubricated noncircular journal bearing configurations. The linearized system approach using finite element method is used to obtain both steady state and dynamic characteristics. The results of the investigation shows that preload has a significant effect on frictional power loss and the ...

Damping in a dilute Bose gas is investigated using a mean-field approximation which describes the coupled oscillations of condensate and non-condensate atoms in the collisionless regime. Explicit results for both Landau and Beliaev damping rates are given for non-uniform gases. In the case of uniform systems we obtain results for the damping of phonons both at zero and finite temperature. The i...

The effect of granular pressure on the fluctuation volume fraction is investigated experimentally in a gas–solid flow system. Granular compressibility, defined by response fractions pressure, also measured. It found that there exists critical beyond which transition from coexistence liquid-like phase and gas-like to homogenous fluids takes place. heterogenous characterized an abrupt change comp...

We study the stability of compressible cylindrical differentially rotating flow in the presence of the magnetic field, and show that compressibility alters qualitatively the stability properties of flows. Apart from the well-known magnetorotational instability that can occur even in incompressible flow, there exist a new instability caused by compressibility. The necessary condition of the newl...

Ye-Ryoung Lee,1 Myoung-Sun Heo,1 Jae-Hoon Choi,1 Tout T. Wang,1,2 Caleb A. Christensen,1 Timur M. Rvachov,1 and Wolfgang Ketterle1 1MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA 2MIT-Harvard Center for Ultracold Atoms, Department of Physics, Harvard University, Cambrid...

We further elaborate on the generalized formulation for cubic equation of state proposed by Cismondi and Mollerup [Fluid Phase Equilib. 232, 74–89 (2005)]. With this formulation, all well-known equations can be described with a certain pair values, which allow generic implementation different state. Based we derive complete thermodynamic model computational fluid dynamics simulations providing ...