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The dispersion relation of forward volume dipolar spin waves in a magnonic curved waveguide is investigated by solving Walker’s equation in cylindrical coordinates with appropriate boundary conditions. Dispersion for exchange spin waves is then calculated using an iterative method. We validate our results by comparing the dispersion relation for higher bending radius with that of a straight waveguide...
Multiple gate MOSFETs (MuGFET) have gained significant attention as the scaling of the conventional MOSFET comes to an end. Of the possible architectures, the gate-all-around nanowire (NW) transistor offers the best gate control over the channel. In order to model GAA nanowire devices for channel lengths less than 10nm, while preserving a connection to the drift-diffusion framework familiar to device...
Damping of Torsional stresses due to sub synchronous resonance (SSR) using a new static var system (SVS) control strategy is investigated in this paper. In order to damp out torsional oscillations, a proportional integral (PI) controller in coordination with auxiliary control signal is employed to modulate the reactive power output of SVS in accordance to locally measurable signals such as combined...
Information Technology advances have bought forth new challenges in healthcare information management, due to the vast amount of medical data that needs to efficiently stored, retrieved and distributed, and the increased security threats that explicitly have to be addressed. In particular, embedding patient information into a medical image through data hiding could improve the level of security and...
Active Magnetic Bearings(AMB) have many advantages such as no friction loss, no abrasion, lubrication-free quality, and used for high rotational speed applications. A complete system consists of an actuator, power amplifier, a rotor position sensor and a control system. In this paper, a closed loop decentralized Fuzzy Logic control for Active magnetic Bearings is designed. For the numerical evaluation...
Series compensation in long transmission lines is an effective solution of enhancing power transfer capacity of Power System network. In this paper, series passive compensation and shunt active compensation provided by static synchronous compensator (STATCOM) and other FACTS controllers connected at the electrical center of the transmission line are considered. The presence of series capacitors has...
This paper presents a new approach to enhance the contrast of microcalcifications in mammograms using a fuzzy algorithm based on Tsallis entropy. In phase I image is fuzzified using S membership function. In Phase II using the non-uniformity factor calculated from local information the contrast of microcalcifications were enhanced while suppressing the background heavily. This is the first time in...
Faster switching with IGBT's is known to enhance the control and efficiency of electrical machines significantly while the same is realized to induce over-voltages at the machine terminal to an extent of 3 to 4pu along with inhomogeneous voltage distribution across the stator winding, which often endanger the insulation reliability. Reliable machine design calls for accurate prediction of voltage...
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