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Article
Open AccessLagrangian particle path formulation of multilayer shallow-water flows dynamically coupled to vessel motion
The coupled motion—between multiple inviscid, incompressible, immiscible fluid layers in a rectangular vessel with a rigid lid and the vessel dynamics—is considered. The fluid layers are assumed to be thin and...
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Article
Open AccessTime-dependent conformal map** of doubly-connected regions
This paper examines two key features of time-dependent conformal map**s in doubly-connected regions, the evolution of the conformal modulus Q(t) and the boundary transformation generalizing the Hilbert transfor...
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Article
Travelling fronts for the KPP equation with spatio-temporal delay
We study an integro-differential equation based on the KPP equation with a convolution term which introduces a time-delay in the nonlinearity. Special attention is paid to the question of the existence of tr...
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Chapter and Conference Paper
Shell Formation in Ngc 474
We present broad band photometry (B and R) of the classic shell galaxy NGC 474. Preliminary results indicate that the shells have a similar colour to and follow the same trend of colour with radius as the unde...
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Article
Absolute and convective instabilities of temporally oscillating flows
The theory of absolute and convective instabilities is extended to the spatially homogeneous, temporally oscillating case. A linear initial-boundary-value problem for small localised disturbances superimposed...
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Article
Hamiltonian spatial structure for three-dimensional water waves in a moving frame of reference
The governing equations for three-dimensional time-dependent water waves in a moving frame of reference are reformulated in terms of the energy and momentum flux. The novelty of this approach is that time-inde...
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Article
Orientation dependentp-type conversion of Fe:InP in hydride VPE regrown EMBH lasers
We have studied semi-insulating Fe:InP regrowth of etched mesa buried heterostruc-ture lasers by hydride vapor phase epitaxy. Type-sensitive staining and electron beam induced current photographs have shown th...
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Chapter
Difference frequency mixing via spin nonlinearities in the far-infrared
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Chapter
Tunable Far-Infrared Generation by Difference-Frequency Mixing in Indium Antimonide
A strong resonant optical nonlinearity due to the conduction electron spins has been observed when the frequency (~100 cm−1) of far-infrared (FIR), generated by difference frequency mixing of two orthogonally pol...