240 research outputs found
Existence, uniqueness and stability results of impulsive stochastic semilinear neutral functional differential equations with infinite delays
This article presents the results on existence, uniqueness and stability of mild solutions of impulsive stochastic semilinear neutral functional differential equations without a Lipschitz condition and with a Lipschitz condition. The results are obtained by using the method of successive approximations
Existence, uniqueness and stability of random impulsive neutral partial differential equations
AbstractIn this paper, the existence, uniqueness and stability via continuous dependence of mild solution of neutral partial differential equations with random impulses are studied under sufficient condition via fixed point theory
Relativistic stellar modeling with perfect fluid core and anisotropic envelope fluid
We investigate the effect of density perturbations and local anisotropy on
the stability of stellar matter structures in general relativity using the
concept of cracking. Adopting a core-envelope model of a super-dense star, we
examine the properties and stability conditions by introducing anisotropic
pressure to the envelope region. Furthermore, we propose self-bound compact
stars with an anisotropic envelope as a potential progenitor for starquakes. We
show how the difference between sound propagation in radial and tangential
directions would be used to identify potentially stable regions within a
configuration. Due to an increase in the anisotropic parameter, strain energy
accumulates in the envelope region and becomes a potential candidate for
building-up quake like situation. This stress-energy stored in the envelope
region that would be released during a starquake of a self-bound compact star
is computed as a function of the magnitude of anisotropy at the core-envelope
boundary. Numerical studies for spherically asymmetric compact stars indicate
that the stress-energy can be as high as erg if the tangential
pressure is slightly more significant than the radial pressure. It is happened
to be of the same order as the energy associated with giant -ray
bursts. Thus, the present study will be useful for the correlation studies
between starquakes and GRBs.Comment: 28 pages, 11 Figures, accepted for publication in Indian J. Phy
A Novel Method for Filtering Unwanted Messages from OSN user Walls
One principal issue in today On-line Social Systems (OSNs) is to give clients the capacity to control the messages posted all alone private space to keep away from that undesirable substance is shown. Up to now OSNs give little backing to this prerequisite. To fill the hole, in this paper, we propose a framework permitting OSN clients to have an immediate control on the messages posted on their dividers. This is accomplished through an adaptable guideline based framework, that permits clients to alter the separating criteria to be connected to their dividers, and a Machine Learning based delicate classifier naturally naming messages in backing of substance based separating
On Some properties of Di-hadronic states
The binding energies of di- hadronic states have been calculated assuming a
'molecular' interaction provided by the asymptotic expression of the residual
confined gluon exchange potential between the component hadrons in the system.
Meson- meson and meson- baryon states have been studied in detail and a mass
formula has been used to calculate total mass of the 'molecules'.Comment: 11 page
The interaction of 11Li with 208Pb
Background: 11Li is one of the most studied halo nuclei. The fusion of 11Li
with 208Pb has been the subject of a number of theoretical studies with widely
differing predictions, ranging over four orders of magnitude, for the fusion
excitation function.
Purpose: To measure the excitation function for the 11Li + 208Pb reaction.
Methods: A stacked foil/degrader assembly of 208Pb targets was irradiated
with a 11Li beam producing center of target beam energies from above barrier to
near barrier energies (40 to 29 MeV). The intensity of the 11Li beam (chopped)
was 1250 p/s and the beam on-target time was 34 hours. The alpha-decay of the
stopped evaporation residues was detected in a alpha-detector array at each
beam energy in the beam-off period (the beam was on for <= 5 ns and then off
for 170 ns).
Results: The 215At evaporation residues were associated with the fusion of
11Li with 208Pb. The 213,214At evaporation residues were formed by the breakup
of 11Li into 9Li + 2n, with the 9Li fusing with 208Pb. The 214At evaporation
residue appears to result from a "quasi-breakup" process.
Conclusions: Most of 11Li + 208Pb interactions lead to breakup with a small
fraction (<= 11%) leading to complete fusion.Comment: 25 pages, 11 figure
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