1,449 research outputs found
Tubewell transfer in Gujarat: A study of the GWRDC approach
Tube wells / Privatization / Groundwater management / Economic aspects / Operations / Maintenance / Equity / Farmers? attitudes / Policy
Algorithms for Stochastic Games on Interference Channels
We consider a wireless channel shared by multiple transmitter-receiver pairs.
Their transmissions interfere with each other. Each transmitter-receiver pair
aims to maximize its long-term average transmission rate subject to an average
power constraint. This scenario is modeled as a stochastic game. We provide
sufficient conditions for existence and uniqueness of a Nash equilibrium (NE).
We then formulate the problem of finding NE as a variational inequality (VI)
problem and present an algorithm to solve the VI using regularization. We also
provide distributed algorithms to compute Pareto optimal solutions for the
proposed game
Dynamics of unbinding of polymers in a random medium
We have studied the aging effect on the dynamics of unbinding of a double
stranded directed polymer in a random medium. By using the Monte Carlo dynamics
of a lattice model in two dimensions, for which disorder is known to be
relevant, the unbinding dynamics is studied by allowing the bound polymer to
relax in the random medium for a waiting time and then allowing the two strands
to unbind. The subsequent dynamics is formulated in terms of the overlap of the
two strands and also the overlap of each polymer with the configuration at the
start of the unbinding process. The interrelations between the two and the
nature of the dependence on the waiting time are studied.Comment: 7 pages, latex, 3 figures, To appear in J. Chem. Phy
Estimating healthcare demand for an aging population: a flexible and robust bayesian joint model
In this paper, we analyse two frequently used measures of the demand for health care, namely hospital visits and out-of-pocket health care expenditure, which have been analysed separately in the existing literature. Given that these two measures of healthcare demand are highly likely to be closely correlated, we propose a framework to jointly model hospital visits and out-of-pocket medical expenditure. Furthermore, the joint framework allows for the presence of non-linear effects of covariates using splines to capture the effects of aging on healthcare demand. Sample heterogeneity is modelled robustly with the random effects following Dirichlet process priors with explicit cross-part correlation. The findings of our empirical analysis of the U.S. Health and Retirement Survey indicate that the demand for healthcare varies with age and gender and exhibits significant cross-part correlation that provides a rich understanding of how aging affects health care demand, which is of particular policy relevance in the context of an aging population
Unexpected crossover dynamics of single polymer in a corrugated tube
We present molecular dynamics study of a generic (coarse-grained) model for
single-polymer diffusion confined in a corrugated cylinder. For a narrow tube,
i.e., diameter of the cylinder , the axial diffusion coefficient
scales as , with chain length , up to then crosses over to Rouse scaling for the larger values. The
scaling is due to the large fluctuation of the polymer chain along
its fully stretched equilibrium conformation. The stronger scaling, namely
, is not observed for an atomistically smooth tube and/or for a
cylinder with larger diameter.Comment: 10 pages, 3 figures, LaTeX, version accepted by J. Chem. Phy
Strength of Mechanical Memories is Maximal at the Yield Point of a Soft Glass
We show experimentally that both single and multiple mechanical memories can
be encoded in an amorphous bubble raft, a prototypical soft glass, subject to
an oscillatory strain. In line with recent numerical results, we find that
multiple memories can be formed sans external noise. By systematically
investigating memory formation for a range of training strain amplitudes
spanning yield, we find clear signatures of memory even beyond yielding. Most
strikingly, the extent to which the system recollects memory is largest for
training amplitudes near the yield strain and is a direct consequence of the
spatial extent over which the system reorganizes during the encoding process.
Our study further suggests that the evolution of force networks on training
plays a decisive role in memory formation in jammed packings.Comment: 13 pages, 4 Figure
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