Introduction: Navigated TKA (Total Knee Arthroplasty) has heightened awareness of mal-alignment in conventional TKA, as well as providing an accurate means of measuring alignment intra-operatively. Debate as to the importance and significance of alignment versus knee balance continues. Aim: To assess cutting error, and examine the hypothesises: • ‘Slotted osteotomies are more accurate than non-...

An electric commutated frog-leg winding permanent-magnet (PM) DC machine is proposed in this paper. It has a semi-closed slotted stator with a classical type of mesh winding introduced from the conventional brushed DC machine and a polyphase electric commutation besides a PM excitation rotor and a circular arrayed Hall position sensor. Under the cooperation between the position sensor and the e...

We report an investigation into the effect of using smart antennas on the performance of the slotted ALOHA protocol with capture in a mobile communications environment with Rayleigh and Log-normal fading. Our results demonstrate that by using smart antennas, we can achieve higher performance in terms of capture probability and throughput when compared to a conventional antenna system using the ...

Synchronous reluctance motors, despite their cost-effective types and wide range of speed, generally have a considerable torque ripple due to changes in magnetic resistance between the flux barriers stator teeth. Given numerous possible rotor combinations with different forms barriers, designing an optimal synchronous motor without use mathematical equations clear algorithm will be very time-co...

An AP1000 nuclear reactor coolant pump is considered to assess the influence of Impeller/Guide vane clearance on performances this type pumps. Experiments and numerical simulations relying an unidirectional fluid-solid coupling approach are used investigate problem (stress, strain mode rotor). The results reveal relationship existing between hydraulic performance ratio. effect ratio maximum equ...

The effects of lobe tip design parameters on compressor performance were evaluated by utilizing a computer simulation package and taking SRM-D asymmetric type rotor profile as an example. The result suggests that the requirements for high efficiency, large capacity, low inter-rotor contact force and low viscous friction loss do not always lead to the use of the same lobe tip designs. Of all the...