The Navier-Stokes equations for the motion of compressible, viscous fluids in the half-space R+ with the no-slip boundary condition are studied. Given a constant equilibrium state (ρ̄, 0), we construct a global in time, regular weak solution, provided that the initial data ρ0,u0 are close to the equilibrium state when measured by the norm |ρ0 − ρ̄|L∞ + |u0|H1 and discontinuities of ρ0 decay near ...

This paper focuses on understanding and assessing the effect of hysteretic behavior (i.e., bilinear, peakoriented and pinching) in the evaluation of peak deformation demands and their distribution over the height for regular frame structures over a wide range of stories (from 3 to 18) and fundamental periods (from 0.3 s. to 3.6 s.). The ground motions used are those with frequency content chara...

The global dynamical properties of a quantum system can be conveniently visualized in phase space by means of a quantum phase space entropy in analogy to a Poincaré section in classical dynamics for two-dimensional time-independent systems. Numerical results for the Pullen–Edmonds systems demonstrate the properties of the method for systems with mixed chaotic and regular dynamics.

I review the large scale global magnetic field structure of our Galaxy, using all information available for disk fields, halo fields and magnetic fields near the Galactic center (GC). Most of the knowledge was obtained from the rotation measures (RMs) of pulsars and extragalactic radio sources. In the local disk of our Galaxy, RM and dispersion measure (DM) data of nearby pulsars yield the stre...

The Navier-Stokes systems for compressible fluids with density-dependent viscosities are considered in the present paper. These equations, in particular, include the ones which are rigorously derived recently as the Saint-Venant system for the motion of shallow water, from the Navier-Stokes system for incompressible flows with a moving free surface [14]. These compressible systems are degenerat...

public health management is a pillar of public health practice. only through effective management can research, theory, and scientific innovation be translated into successful public health action. with this in mind, the u.s. centers for disease control and prevention (cdc) has developed an innovative program called improving public health management for action (impact) which aims to address th...