Recently, graphene field-effect transistors (FET) with cutoff frequencies (f(T)) between 100 and 300 GHz have been reported; however, the devices showed very weak drain current saturation, leading to an undesirably high output conductance (g(ds)= dI(ds)/dV(ds)). A crucial figure-of-merit for analog/RF transistors is the intrinsic voltage gain (g(m)/g(ds)) which requires both high g(m) (primary ...

Magnetic bearing control schemes frequently use a bias current together with a superimposed control current to improve actuator gain and linearity. However, even in no load conditions, there is power loss due to the bias currents. There are ohmic losses in the coils, and in high-speed machines there are eddy-current and hys-teresis losses in the rotor because of the bias uxes. The force slew-ra...

Current temperature stress (CTS) measurements were performed on RF sputter amorphous In-Ga-Zn-O (a-InGaZnO) thin film transistors (TFTs). We investigated the effect of stress current (ISTR) and stress temperature (TSTR) on the electrical properties of the aInGaZnO TFTs when stressed in both the linear and saturation regimes.

Cone photoreceptors are less sensitive to light and the duration of their photoresponse is shorter than that of rods. In salamander rods and cones, we identified 3 components in membrane currents activated by bright flashes of light: an early receptor current (ERC) resulting from charge displacement within visual pigments, a saturation photocurrent generated by the closure of the cGMP-sensitive...

BACKGROUND Current, invasive cerebral oxygenation monitors require either retrograde jugular venous bulb cannulation or intraparenchymal probe insertion. There is no accurate, noninvasive, continuous monitor of cerebral blood oxygenation. METHODS The authors designed, built, and tested novel optoacoustic instrumentation that continuously measures blood oxygenation in the superior sagittal sin...

Formal verification is becoming a fundamental step in assuring the correctness of safety-critical systems. However, due to these systems being often asynchronous and even distributed, their behaviour can be very complex. Thus, their verification necessitates methods that can deal with huge or even infinite state spaces. In this paper we present how the integration of two advanced algorithms for...

obejective(s): in this research, magnetite nanoparticles with an average size of 23-36 nm were successfully synthesized via surfactant-free electrochemical method using iron as the anode and water as the electrolyte in a closed aqueous system in the presence of naoh at room temperature. methods: the effect of the current density on product formation and particle size was investigated. particle ...