Switched-capacitor DC-DC converters are useful alternatives to inductor-based converters in many lowpower and medium-power applications. This work develops a straightforward analysis method to determine a switched-capacitor converter’s output impedance (a measure of performance and power loss). This resistive impedance is a function of frequency and has two asymptotic limits, one corresponding ...

Rat sciatic nerve fibres do not conduct nerve impulses at a normal rate after the rat has been injected with alloxan (Eliasson, 1964). The dose given to the rat must be large enough to cause clinically detectable diabetes. The conduction rate slows to levels of 30 to 50% of the original within the first 10 days after the injection; possibly this is due to a direct toxic effect of the alloxan on...

Papilledema and raised intracranial pressure have been reported in association with Guillain-Barre syndrome. Papilledema is usually asympotomatic or associated with mild visual field defects, without any visual loss. The cerebrospinal fluid protein is usually reported to be high. A case of a 35 year old lady is reported, who presented with headache, diplopia and progressive visual loss in both ...

A 0-dimensional model with parabolic profiles is employed to assess the use of the combination of enhanced thermal conduction loss and radial motion for passive thermal stability control of an ignited tokamak plasma. The increases in ignition requirements needed for the achievement of passive stability are determined. Both the independent thermal stabilization effects of radial motion and enhan...

We undertook a retrospective cohort study of 16 experienced recreational scuba divers and 16 matched non-diver controls to determine the prevalence of hearing loss and, if present, the likely causes of this loss. Each subject was required to be aged 55 years or less and to have no history or likelihood of hearing loss. An audiologist, blinded to each subject's group status, undertook all examin...

A GaN Reverse-Conducting HEMT (RC-HEMT) is proposed and fabricated on the GaN/AlGaN/GaN platform. It features an integrated Schottky barrier diode (SBD) to realize reverse conduction double-heterojunction enhance breakdown voltage (BV). Compared with inherent capability of conventional (Con. HEMT), built-in SBD exhibits a low turn-on (VRT) its VRT independent threshold gate bias. At off-state, ...

INTRODUCTION  The bone-anchored hearing aid (BAHA) is a bone conduction hearing device that transmits sound directly into the inner ear. It is mainly used in patients with conductive hearing loss associated with aural atresia, but it is also used in those with mixed and sensorineural hearing loss. GOALS  To review the main indications for BAHA, to analyze the audiometric results and its benef...