Abstract The Debye sheath is known to vanish completely in magnetised plasmas for a sufficiently small electron gyroradius and angle between the magnetic field wall. This depends on current onto When vanishes, there still potential drop wall plasma across presheath. corresponding predicted collapse shown be much smaller than previous estimates, scaling with electron-ion mass ratio not square ro...

Imaging the interior structure of comets and asteroids can provide insight into their formation in the early Solar System, and can aid in their exploration and hazard mitigation. Accurate imaging can be accomplished using broadband wavefield data penetrating deep inside the object under investigation. This can be done in principle using seismic systems (which is difficult since it requires cont...

This paper gives a never completely account of approaches that have been used for the research community for representing knowledge. After underlining the importance of a layered approach and the use of standards, it starts with early eVorts used for artiWcial intelligence researchers. Then recent approaches, aimed mainly at the semantic web, are described. Coding examples from the literature a...

A hybrid modeling framework for scattering from general 3D elastic targets in a stratified ocean waveguide is presented, incorporating multiple scattering between the target and the stratification, and allowing for targets to be completely or partially buried in a stratified seabed. The approach uses a generalized wavefield superposition, or virtual source approach, together with a Fourier-Bess...

BACKGROUND There are two main surgical approaches, simple ulnar nerve decompression at the elbow, and anterior transposition of the nerve in treatment of cubital tunnel syndrome. Both techniques were reported in literature in details with similar reported success rates. Here, we present a modified simple de-compression surgical technique in treatment of cubital tunnel syndrome. METHODS Fifty...