3,466 research outputs found
Transport coefficients at Metastable Densities from models of Generalized Hydrodynamics
In the present work we compute the enhancement in the long time transport
coefficients due to correlated motion of fluid particles at high density. The
fully wave vecor dependent extended mode coupling model is studied with the
inclusion of an additional slow variable of the defect density for the
amorphous system.
We use the extremely slow relaxation of the density correlation function
observed in the light scattering experiments on colloids to estimate the input
parameters for the model The ratio of long time to short time diffusion
coefficient is studied around the the peak of the structure factor.Comment: 17 pages, 8 figure
Temperature dependence of the Power law exponent of relaxation in a supercooled Liquid
The dynamics of Lennard-Jones fluid is studied through extended mode coupling
theory (MCT) with the inclusion of the slow mode of defect density. Inclusion
of defect density facilitates the liquid like state for temperatures much lower
than predicted from ideal MCT. From the present model the temperature
dependence of the power law exponent is obtained at a {\em constant pressure}.
We have also computed the wave number dependence of the power law exponent.Comment: 10 pages, 6 figure
Fragility and Boson Peak formation in a Supercooled Liquid
We analyze results for the Boson Peak from the neutron time of flight
spectroscopy data on Ge-As-Se, and Raman spectra data on m-TCP and OTP, using a
recent mode coupling model that takes into account the coupling of density
fluctuations with vibrational modes in presence of defects in the supercooled
state.
From the experimental results for different materials we observe that for
more fragile systems characterized by increasing fragility parameter m, a
slower relaxation of the defect-density correlation is needed to give rise to
the observed peak in the spectra.Comment: 6 pages, 5 figure
Packet flow analysis in IP networks via abstract interpretation
Static analysis (aka offline analysis) of a model of an IP network is useful
for understanding, debugging, and verifying packet flow properties of the
network. There have been static analysis approaches proposed in the literature
for networks based on model checking as well as graph reachability. Abstract
interpretation is a method that has typically been applied to static analysis
of programs. We propose a new, abstract-interpretation based approach for
analysis of networks. We formalize our approach, mention its correctness
guarantee, and demonstrate its flexibility in addressing multiple
network-analysis problems that have been previously solved via tailor-made
approaches. Finally, we investigate an application of our analysis to a novel
problem -- inferring a high-level policy for the network -- which has been
addressed in the past only in the restricted single-router setting.Comment: 8 page
Corrigendum: An evolving perspective on the Pseudomonas aeruginosa orphan quorum sensing regulator QscR
A Study on the Revenue Generation Trend of Thiruvallur and Thiruttani Taluks (Viz., Thiruppasur, Siruvanoor, Thiruvallur and Agoor and Pattabiramapuram Villages of Thiruttani) of Tamil Nadu+
Tamilnadu is one of the economically developed states in India which has 32 districts taluks in hundreds and villages in thousands But lots of studies on Tamilnadu s regional development have found a wide disparity in economic development across the state The North part of Tamilnadu is a comparatively backward region in general and the districts like Dharmapuri Villupuram Tiruvannamalai and Thiruvallur in particular As a result it is of special importance and essential to review the rural local bodies finances with reference to backward district in general and Thiruvellur district in particular in the wake of 73rd constitutional amendmen
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