Andrew J. Mason

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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)
We outline a new dynamic programming approach for determining the most likely route taken by a vehicle given a set of GPS locations and times recorded by an AVL (automatic vehicle location) system. By using optimisation approaches, this map matching algorithm can solve a complex maximum likelihood problem that takes into account data such as the vehicle’s(More)
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 minimize(More)
This paper details a new simulation and optimisation based system for personnel scheduling (rostering) of Customs staff at the Auckland International Airport, New Zealand. An integrated approach using simulation, heuristic descent and integer programming techniques has been developed to determine near-optimal staffing levels. The system begins by using 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)
Modern microelectrode arrays acquire neural signals from hundreds of neurons in parallel that are subsequently processed for spike sorting. It is important to identify, extract, and transmit appropriate features that allow accurate spike sorting while using minimum computational resources. This paper describes a new set of spike sorting features, explicitly(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)
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)