3,176 research outputs found
Shape Instabilities in the Dynamics of a Two-component Fluid Membrane
We study the shape dynamics of a two-component fluid membrane, using a
dynamical triangulation monte carlo simulation and a Langevin description.
Phase separation induces morphology changes depending on the lateral mobility
of the lipids. When the mobility is large, the familiar labyrinthine spinodal
pattern is linearly unstable to undulation fluctuations and breaks up into
buds, which move towards each other and merge. For low mobilities, the membrane
responds elastically at short times, preferring to buckle locally, resulting in
a crinkled surface.Comment: 4 pages, revtex, 3 eps figure
A Novel Monte Carlo Approach to the Dynamics of Fluids --- Single Particle Diffusion, Correlation Functions and Phase Ordering of Binary Fluids
We propose a new Monte Carlo scheme to study the late-time dynamics of a
2-dim hard sphere fluid, modeled by a tethered network of hard spheres.
Fluidity is simulated by breaking and reattaching the flexible tethers. We
study the diffusion of a tagged particle, and show that the velocity
autocorrelation function has a long-time tail. We investigate the
dynamics of phase separation of a binary fluid at late times, and show that the
domain size grows as for high viscosity fluids with a
crossover to for low viscosity fluids. Our scheme can accomodate
particles interacting with a pair potential ,and modified to study
dynamics of fluids in three dimensions.Comment: Latex, 4 pages, 4 figure
DESIGN & IMPLEMENTATION OF TEACHER STUDENT INTERACTION SYSTEM USING ZIGBEE & RFID
Research of the past years has led to numerous novel developments and approaches for wireless sensor networks (WSNs). However, most previous work has focused on either mathematical analysis or theoretical algorithms with extensive simulation results. In this paper, in order to realistically understand the complexity of WSNs, a ZigBee/IEEE 802.15.4 platform has been designed and implemented. Based on an IEEE 802.15.4 radio and ZigBee protocol stack, the developed ITRI ZBnode is an autonomous wireless communication and computing platform aimed at fast prototyping and research in WSNs. The platform attempts to provide a low data rate, low power, and low cost wireless networking on the device-level communication. Finally, examples of tree and mesh network formation are provided to demonstrate practicability of the developed ZBnode platform
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