A simple model of nonlinear salt-finger convection in two dimensions is derived and studied. The model is valid in the limit of a small solute to heat diffusivity ratio and a large density ratio, which is relevant to both oceanographic and astrophysical applications. Two limits distinguished by the magnitude of the Schmidt number are found. For order one Schmidt numbers, appropriate for astroph...

We consider the zero viscosity limit of long time averages of solutions of damped and driven Navier-Stokes equations in R. We prove that the rate of dissipation of enstrophy vanishes. Stationary statistical solutions of the damped and driven Navier-Stokes equations converge to renormalized stationary statistical solutions of the damped and driven Euler equations. These solutions obey the enstro...

Context-awareness and adaptation are highly interrelated key concepts to build applications for heterogeneous and dynamic execution environments. While gathering, distribution, abstraction, and management of context is examined in research for several years, development of context-aware, adaptive applications, and the relations between context and adaptation are rarely considered. We present a ...

Due to the limitation of energy resources, energy efficiency is a key issue in wireless sensor networks (WSNs). Clustering is proved to be an important way to realize hierarchical topology control, which can improve the scalability and prolong the lifetime of wireless sensor networks. In this paper, an energy-driven unequal clustering protocol (EDUC) for heterogeneous wireless sensor networks i...

Due to different data correlation among events in driven Wireless Sensor Networks (WSNs), over-overlapping paths from events in order to maximize the data aggregation will weaken the monitoring ability of WSNs instead of improving the network performance. There should be a tradeoff between data aggregation maximization and energy balance. Excessive pursuit of high data aggregation regardless of...

Balance arises from the interplay of external forces acting on the body and internally generated movements. Many animal bodies are inherently unstable, necessitating corrective locomotion to maintain stability. Understanding how developing animals come to balance remains a challenge. Here we study the interplay among environment, sensation, and action as balance develops in larval zebrafish. We...

In present paper, a numerical analysis for a rectangular cavity filled with a anisotropic porous media has been studied. It is assumed that the horizontal walls are adiabatic and impermeable, while the side walls of the cavity are maintained at constant temperatures and concentrations. The buoyancy force that induced the fluid motion are assumed to be cooperative. In the two extreme cases o...

Membrane phase behavior induced by the binding of curvature-inducing proteins is studied a combination analytical and numerical approaches. In thermal equilibrium under detailed balance between unbinding, membrane exhibits three phases: an unbound uniform flat (U), bound (B), separated/corrugated (SC). SC phase, form hexagonally-ordered bowl-shaped domains. The transitions U phases B are second...

We want to go beyond “passive rag-doll like” simulation characters towards more “active” intelligent self-driven solutions. The “puppet on strings” approach lacks dynamic interactive properties for engaging realistic and immersive virtual environments. This paper focuses on “Self-Driven character” (e.g., procedural physics-based techniques) that balance and react in a life-like manner using phy...