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Wireless underground sensor networks (WUSNs) based on magnetic induction (MI) have been recently proposed as a promising candidate for underground networking. The benefit of the MI-WUSNs compared to other solutions (e.g. so-called Through-The-Earth communication) is related to the substantially lower path loss and lower vulnerability to the changes of the soil properties. In the past, some efforts...
Wireless underground sensor networks (WUSNs) present a variety of new research challenges. Magnetic induction (MI) based transmission has been proposed to overcome the very harsh propagation conditions in underground communications in recent years. In this approach, induction coils are utilized as antennas in the sensor nodes. This solution achieves larger transmission ranges compared to the traditional...
In the last decades the electrical stimulation therapy has played an important role for neural regeneration. However, the amplitude of electric shocks will be decayed greatly after penetrating into biological tissues. The patient will also suffer from the skin injury caused by electrodes. Recent years, the positive effect of magnetic stimulation on neuronal growth has been studied for several years...
Several novel linear, either planar or tubular, flux-switching permanent magnet (FSPM) brushless machines with different winding configurations and mover slot/stator pole combinations are proposed and compared, with particular reference to the tubular format. Coil connections are determined from the coil back-EMF vectors. The influence of major design parameters, such as the split ratio, the stator...
Closed superconducting coils made from Bi2223/Ag multi-filamentary tapes were successfully fabricated. By measuring the magnetic flux density at the center of the coil, we were able to observe the persistent current mode of superconducting closed coil in liquid nitrogen. The persistent current measured was 1.39 A and remained unchanging for more than 500 hours after several hours decay. It was estimated...
In order to obtain the basic characteristics of a single-helix carbon microcoil (SH-CMC) with the diameter of ~1 mum for use as tactile sensor elements, the mechanical and electrical properties of a SH-CMC prepared by thermal chemical vapor deposition (CVD) were measured, and compared with the properties of a double-helix carbon microcoil (DH-CMC) having a diameter of about 5 mum. A SH-CMC can be...
The tactile and proximity sensing properties of CMC/silicone composites were studied by evaluating with the impedance Z as a function of CMC content in matrix. The optimum CMC content as proximity sensor element was 3 wt%, while the tactile sensor properties were increased in intensity with CMC content (over 7 wt%). The CMC sensor element with surface size of 300 times 300 mm and with a CMC content...
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