Follow the links to read the full papers in the IET Digital Library.
Researchers in China and Hong Kong present a 3 point Distributed Bragg Reflector (DBR) fibre laser sensor array, for fibre bending radius, transverse load and axial strain sensing. Their aim is to demonstrate the potential of multiplexing this kind of sensor, which can support both frequency division and wavelength division multiplexing within one scheme.
Research from Johns Hopkins University in the US proposes two approaches to reduce signal distortion in interferometric angular velocity measurements. The approaches can be used to combine interferometric radar with Doppler radar for security applications to allow detection and classification of moving humans, regardless of trajectory relative to the radar. This is currently only possible with target tracking and significant additional processing.
Researchers in China have reported an AlGaN/GaN/Si metal oxide semiconductor (MOS)-high electron mobility transistor (HEMT) design that improves threshold hysteresis. Also achieving low specific on-resistance and large maximum saturate drain current, the design is aimed at applications in medium voltage power devices.
Two memristive circuits with steady-state and mixed-mode oscillations (MMOs), comprising both small and large-amplitude oscillations, have been proposed in research from the US and Poland. The numerical study shows the pinched hystereses and bifurcations produced by the circuit designs.
Work from Korea models the use of a MR-based electrical impedance tomography (MREIT) technique, using a 3D finite element model of the human abdomen. The current pathway and the electric field distribution estimates produced were used to study the effects of different electrode placements. This could be used in optimising electrode configuration for in-vivo liver MREIT.