The Finite-Difference Time-Domain (FDTD) method in cylindrical coordinates is used to describe electromagnetic wave propagation in a cold magnetized plasma. This enables us to study curvature effects in toroidal plasma. We derive the discrete dispersion relation of this FDTD scheme and compare it with the exact solution. The accuracy analysis of th...

For assessing the risk caused by the flooding due to a breach across a levee along a river, one should simulate both the process of breaching and the process of propagation in the flood plain. If the breach location is unknown, a lot of locations should be investigated to estimate the peak water depth, the time of arrival of the wave and the peak v...

The transmission of vibrations in the ground, due to a high-speed moving vertical harmonic rectangular load, is investigated theoretically. The problem is three-dimensional and the interior of the ground is modelled as a totally or partially saturated porous viscoelastic half-space, using the complete Biot theory. The solutions in the transformed d...

Taking account the earth Q effect (i.e., frequency-dependent amplitude decay and velocity dispersion) during seismic migration simultaneously, the resultant seismic image is expected to be high resolution with true amplitude and correct timing. We present here a stabilized algorithm for such a "migration incorporating inverse Q filtering'' scheme, ...

We developed an exact analytical treatment for space-charge waves within a relativistic electron beam in terms of (self-reproducing) propagating eigenmodes. This result is of obvious theoretical relevance as it constitutes one of the few exact solutions for the evolution of charged particles under the action of self-interactions. It also has clear ...

Lucietti, J.Schaefer-Nameki, S. (Hamburg Univ. (Germ...Sinha, A. (Cambridge Univ. (United Kingd...Deutsches Elektronen-Synchrotron (DESY),...

The exact bosonic Neumann matrices of the cubic vertex in plane-wave light-cone string field theory are derived using the contour integration techniques developed in our earlier paper. This simplifies the original derivation of the vertex. In particular, the Neumann matrices are written in terms of #mu#-deformed Gamma-functions, thus casting them i...