1,976 research outputs found
UMTS Network Planning - The Impact of User Mobility
The impact of user mobility on network planning is investigated. For a system of two base stations the stationary distribution of a Markov chain, including mobility, is computed
Numerical Analysis of Quasiholes of the Moore-Read Wavefunction
We demonstrate numerically that non-Abelian quasihole excitations of the fractional quantum Hall state have some of the key properties necessary
to support quantum computation. We find that as the quasihole spacing is
increased, the unitary transformation which describes winding two quasiholes
around each other converges exponentially to its asymptotic limit and that the
two orthogonal wavefunctions describing a system with four quasiholes become
exponentially degenerate. We calculate the length scales for these two decays
to be and
respectively. Additionally we determine which fusion channel is lower in energy
when two quasiholes are brought close together.Comment: 4 pages, 3 figure
Bubbly Turbulent Drag Reduction Is a Boundary Layer Effect
In turbulent Taylor-Couette flow, the injection of bubbles reduces the overall drag. On the other hand, rough walls enhance the overall drag. In this work, we inject bubbles into turbulent Taylor-Couette flow with rough walls (with a Reynolds number up to 4×105), finding an enhancement of the dimensionless drag as compared to the case without bubbles. The dimensional drag is unchanged. As in the rough-wall case no smooth boundary layers can develop, the results demonstrate that bubbly drag reduction is a pure boundary layer effec
Saturation effect and determination of nuclear matter denisity distribution from optical potential
A refined double folding procedure with density dependence of the effective nucleon- -nucleon interaction included is used to calculate the real part of the alpha particle — Ca potentials. We show that the experimentally determined difference between rms radii of the (real) potentials implies a larger size of the nuclear matter distribution of the Ca nucleus as compared to the Ca nucleus
104 MeV alpha particle and 156 MeV ⁶Li scattering and the validity of refined folding model approaches for light complex projectile scattering
What do we know about the radial shape of nuclei in the Ca-region (Fragezeichen) Proceedings of the Karlsruhe International Discussion Meeting, held at Kernforschungszentrum Karlsruhe, May 2-4, 1979
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