axial flux permanent magnet (afpm) machines are attractive candidates for electric vehicles (evs) applications due to their axial compact structure, high efficiency, high power and torque density. this paper presents general design characteristics of afpm machines. moreover, torque density of the machine which is selected as main objective function, is enhanced by using genetic algorithm (ga) a...

Alterations in kinetic patterns of pedal force and crank torque due to changes in surface grade (level vs. 8% uphill) and posture (seated vs. standing) were investigated during cycling on a computerized ergometer. Kinematic data from a planar cine analysis and force data from a pedal instrumented with piezoelectric crystals were recorded from multiple trials of 8 elite cyclists. These measures ...

We investigated the effects of hydroxyapatite (HA) coating on the purchase of pedicle screws. A total of 23 consecutive patients undergoing lumbar fusion was randomly assigned to one of three treatment groups. The first received uncoated stainless-steel screws, the second screws which were partly coated with HA, and the third screws which were fully coated. The insertion torque was recorded. Af...

BACKGROUND AND OBJECTIVE The present study aimed to assess the effects of induced diabetes and the administration of aminoguanidine in the biomechanical retention of implants in rats. MATERIAL AND METHODS Thirty-six rats were randomly divided into six groups: group 1, healthy rats (no aminoguanidine); group 2 and group 3, healthy rats receiving 10 and 20 mg/kg of aminoguanidine daily, respect...

In this article, a neural network (NN) approach is introduced to estimate the nonnoisy speed and torque from noisy measured currents voltages in induction motors with variable drives. The proposed estimation method comprised of speed–torque estimator signal denoiser. A new training strategy that combines large amount simulated data small real-world data. denoiser does not require ground-truth f...

SUMMARY Etching of sacrificial material is widely used in surface micromachining technology to form integrated micro mechanical structures. The process typically consists of three steps: the removal of sacrificial-layer material using liquid chemicals, rinsing, and removal of the rinse liquid (drying). The last step is known to cause surface sticking and drastic reduction of device yield. This ...

INTRODUCTION This prospective observational study evaluated changes in the 3-dimensional position and remodeling of the mandibular rami, condyles, and chin at splint removal and 1 year after mandibular advancement surgery. METHODS Presurgery, splint removal (4-6 weeks postsurgery), and 1-year postsurgery cone-beam computed tomography scans of 27 subjects were used. Superimposition on the cran...

This study evaluated the application of laser-induced bone therapy (LIBT) to reduce implant healing time in rat tibia. Twenty 10-week-old female Sprague-Dawlay rats were used. The rats received laser irradiation (laser group) or sham operation (control group) on either side of the tibia. Five days after invasion, titanium implants were inserted in proximal tibia. Five, 10, and 20 days after imp...

Osseointegration is dependent on implant surface characteristics, including surface chemistry and topography. The presence of nanosized calcium phosphates on the implant surface is interesting to investigate since they affect both the nanotopography and surface chemistry, forming a bone mineral resembling surface. In this work, the osseointegration of titanium implants with and without the pres...

The removal of the non-return valve from the refrigeration system with a twin screw compressor is realizable by fitting a non-reversing clutch to the prime mover to restrain the reverse rotation of the compressor following shut down. Utilizing a suite of computer programs developed by the authors, the influence of the non-return valve is examined; gas torques under normal running condition and ...