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Researchers in Japan have succeeded in controlling neural signal propagation in neurons using three electrodes analogous to a transistor in a conventional electronic device. If neural signals can be controlled completely, neural electronic devices will be able to manage local pain within the human body.
The performances of communication and illumination have been considered simultaneously in visible light communication systems by researchers in Korea. They have shown a balance dimming range to obtain reasonable performance for indoor wireless communication systems.
Using red-shifted solitons as a pump field, researchers in China have generated the second and third harmonics simultaneously for the first time in a photonic crystal fibre. The build-up of the second and third harmonics in relation to the spectral evolution of the soliton pump field makes PCFs an effective source of short wavelength radiation.
Researchers in China have presented the first use of multi-wavelength coherent detection in Brillouin optical fibre sensing fields. The device can be used to simultaneously measure temperature and strain along sensing optical fibres, for example to detect deformations or diagnose problems in large-scale structures such as buildings, tunnels and oil pipes.
Researchers in the US have designed the first heterojunction bipolar transistors with hydrogenated amorphous silicon contacts on crystalline silicon substrates. The current gain of the devices is very high, demonstrating the promise of these devices as current source/drivers for various applications, such as VLSI bipolar transistor devices and organic light-emitting diodes in active matrix displays.