Power-operated Prostheses

Surgical treatment of aneurysm of the aortic arch. Report of two operated cases with synthetic prostheses.

T HE technique of resection and transplantation of the thoracic aorta, especially of the ascending aorta or the aortic arch has been behind the time because of its influence to the heart, problems concerning the cerebral circulation, spinal cord damages and difficulties of the technique itself. Since DeBakey et al. 1) reported operative methods for resection of aneurysm of the ascending aorta o...

Low-Power, High Data Rate Transceiver System for Implantable Prostheses

Wireless telemetry is crucial for long-term implantable neural recording systems. RF-encoded neurological signals often require high data-rates to transmit information from multiple electrodes with a sufficient sampling frequency and resolution. In this work, we quantify the effects of interferers and tissue attenuation on a wireless link for optimal design of future systems. The wireless link ...

High power-density single-chamber fuel cells operated on methane

Single-chamber solid oxide fuel cells (SC-SOFCs) incorporating thin-film Sm0.15Ce0.85O1.925 (SDC) as the electrolyte, thick Ni + SDC as the (supporting) anode and SDC + BSCF (Ba0.5Sr0.5Co0.8Fe0.2O3−δ) as the cathode were operated in a mixture of methane, oxygen and helium at furnace temperatures of 500–650 ◦C. Because of the exothermic nature of the oxidation reactions that occur at the anode, ...

On-chip Power Supply for Subthreshold-Operated CMOS LSIs

An on-chip voltage supply regulator for subthreshold-operated CMOS logic LSIs is proposed. The regulator transforms lithium battery voltage 3 V to low supply voltage 0.4-0.5 V for subthreshold-operated CMOS logic LSIs. It monitors the gate delay in the LSI and produces an appropriate supply voltage such that the delay is equal to a value determined by a built-in capacitor-resistor reference. We...

Coordination of Reactive Power Scheduling in a Multi-area Power System Operated by Independent Utilities