43,053 research outputs found
Extremal basic frequency of non-homogeneous plates
In this paper we propose two numerical algorithms to derive the extremal
principal eigenvalue of the bi-Laplacian operator under Navier boundary
conditions or Dirichlet boundary conditions. Consider a non-homogeneous hinged
or clamped plate , the algorithms converge to the density functions on
which they yield the maximum or minimum basic frequency of the plate
Higher harmonic anisotropic flow of identified particles in Pb-Pb collisions with the ALICE detector
Anisotropic flow plays a crucial role in establishing the equation of state
of the Quark Gluon Plasma. The results at RHIC and LHC have demonstrated that
the matter created in heavy-ion collisions behaves as a nearly perfect fluid
reflected in the low value of the shear viscosity over entropy density ratio
(). The higher flow harmonics are particularly sensitive to the value
of in hydrodynamic calculations. In this analysis, we present the
first ALICE results on the differential , and
for , , p() from the high
statistics 2011 heavy-ion run. We investigate how these coefficients
evolve with particle mass and centrality for the 0--1\% and 20--30\% centrality
ranges. These new measurements aim at differentiating between models that use
different initial conditions, constraining further the value of and
allowing to decouple the influence of the late hadronic stage from the
hydrodynamic evolution of the system.Comment: proceeding of "Quark Matter 2015", Kobe-Japa
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