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Touch function is merged into the display for the convenient interfaces between man and machine, particularly in mobile phones. In addition, the fingerprint recognition module is also adopted in mobile phones for the security purpose. In this paper, capacitive sensor arrays of oxide thin film transistors (TFTs) were investigated for fingerprint recognition. For the transparent sensor array, oxide...
Arc flash on distribution circuits is a safety issue that can impact work practices for line and substation workers. This paper shows test results for arc flash events in medium-voltage switchgear cubicles and live-front transformer enclosures. Both scenarios can result in more incident energy than the prediction of IEEE 1584-2002. Much higher than expected energies were measured from rack-in style...
This paper aims to develop a UHF Gen 2 RFID system for transcutaneous operation for identifying and monitoring orthopedic implants. The major problems of using existing RFID antennas at UHF band for transcutaneous operation include possible interference with pacemakers and interference with other RFID systems working at the same band. To provide a solution for the above problems, this paper uses transcutaneous...
According to NFPA 70E, more than 2000 workers are admitted to hospital burn centers per year for extensive injuries caused by arc flash accidents. Arc flash incidents occur when unintended electric current flows through air, superheating the air and causes an explosion. Recognizing the significant threat posed by arc flash hazards, IEEE and NFPA have joined forces on an initiative to support research...
The application of the superconducting power apparatus is now being considered as one of the promising tool for enlarging the limited transmission capacity of the traditional electric power apparatus due to the several technical advantages such as reduced size, weight, high efficiency and so on. Therefore, since more than two decades, many research institutes try to improve performance by carrying...
A MEMS-scale nonlinear resonator for ultra wide-bandwidth (UWB) energy harvesting applications has been designed and fabricated. Ambient vibration with a varying frequency spectrum is converted directly to electricity via the piezoelectric effect. Unlike most energy harvesters reported, our design utilizes the tensile stretching strain in a doubly-anchored beam [1, 2]. This stretching results in a...
We present a novel MEMS-based power generator using activation of cardiomyocytes. Cardiomyocytes are cultured on the MEMS fabricated lead magnesium niobate-lead titanate (PMN-PT) single crystal diaphragm, directly and the mechanical stress induced by contraction forces from cardiomyocytes is conversed into electrical power. This PMN-PT single crystal diaphragm has one-side interdigitated electrode...
In the first part of the paper in a short review the history of the development of gas-filled high power switches is described, including all the special switching devices, which had been proposed to overcome specific shortcomings of the basic configurations of gas-filled devices like spark gaps, cold and hot cathode thyratrons and triggered vacuum tubes. The second part treats in detail the most...
We performed a degradation study of high-brightness Nichia single-quantum well AlGaN-InGaN-GaN green light-emitting diodes (LEDs). The devices were subjected to high current electrical stress with current pulse amplitudes between 1 A and 7 A and voltages between 10 V and 70 V with a pulse length of 100 ns and a 1 kHz repetition rate. The study showed that when the current amplitude was increased above...
It has been established by a number of investigators [1]–[4] that the statistics of breakdown of liquid dielectrics change with forced liquid motion. More specifically, the distribution of liquid breakdown voltage shifts with increasing velocity from the extreme value distribution that characterizes stationary fluids to a Gaussian distribution [2],[3]. This is quite significant from the practical...
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