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—This paper describes an area and power-efficient VLSI approach for implementing the discrete wavelet transform on streaming multielectrode neurophysiological data in real time. The VLSI implementation is based on the lifting scheme for wavelet computation using the symmlet4 basis with quantized coefficients and integer fixed-point data precision to(More)
An integrated CMOS amperometric instrument with on-chip electrodes and packaging for biosensor arrays is presented. The mixed-signal integrated circuit supports a variety of electrochemical measurement techniques including linear sweep, constant potential, cyclic and pulse voltammetry. Implemented in 0.5 μm CMOS, the 3 × mm(2) chip dissipates 22.5 mW for a(More)
Protein-based bioelectrochemical interfaces offer great potential for rapid detection, continuous use, and miniaturized sensor arrays. This paper introduces a microsystem platform that enables multiple bioelectrochemical interfaces to be interrogated simultaneously by an onchip amperometric readout system. A post-complementary metal-oxide semiconductor(More)
—Nanoparticle coated chemiresistor (CR) arrays enable highly sensitive vapor detection in systems such as a micro gas chromatograph or an electronic nose. However, they suffer shortcomings such as a small response compared to a large baseline value, large baseline variation across devices, and significant baseline drift over time. This paper describes a new(More)
Time-frequency domain signal processing of neural recordings, from high-density microelectrode arrays implanted in the cortex, is highly desired to ease the bandwidth bottleneck associated with data transfer to extra-cranial processing units. Because of its energy compactness features, discrete wavelet transform (DWT) has been shown to provide efficient(More)
—A compact wide-frequency-range quadrature sinu-soid signal generator tailored to on-chip impedance spectroscopy instrumentation applications is described. Using a new hybrid structure, it provides seven orders of frequency-tuning range (1 mHz to 10 kHz) appropriate for impedance characterization of many sensor materials. The signal generator exhibits very(More)
We present a new technique (RIIPS) for solving rostering problems in the presence of service uncertainty. RIIPS stands for " Rostering by Iterating Integer Programming and Simulation ". RIIPS allows great complexity of the stochastic system being rostered. This modelling freedom comes at a price, as the approach can be extremely computationally intensive.(More)
The St. John Ambulance Service (Auckland Region) in New Zealand (St Johns) supplies ambulance services to Crown Health Enterprises. Current and future contracts specify several minimum performance targets that St Johns must achieve. As the city of Auckland grows, roads become congested, and population demographics change. These changes mean that St. Johns(More)
In this paper, we show how the calculation of partition coefficients for the analysis of Genetic Algorithms may be extended to non-binary alphabets. We demonstrate the use of such coefficients in the analysis of deception and the construction of fully deceptive problems of any given order. We also show how previous analysis of static deception may be(More)