UScholar Works
 
Filters: Department: "Electrical & Computer Engineering" Collection: "ir_uspace"
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CreatorTitleDescriptionSubjectDate
1 Normann, Richard A.; Campbell, Patrick K.; Jones, Kelly E.; Huber, Robert J.; Horch, Kenneth W.Silicon-based, three-dimensional neural interface: manufacturing processes for an intracortical electrode arrayA method has been developed for the manufacture of a "three-dimensional" electrode array geometry for chronic intracortical stimulation. This silicon based array consists of a 4.2 x 4.2 x 0.12 mm thick monocrystalline substrate, from which project 100 conductive, silicon needles sharpened to facilit...Electric Stimulation; Electrodes, Implanted; Sensory Cortex; Intracortical Electrode Array1991
2 Mathews, V. JohnA new model of perceptual threshold functions for application in image compression systemsThis paper discusses the development of a perceptual threshold model for the human visual system. The perceptual threshold functions describe the levels of distortions present at each location in an image that human observers can not detect. Models of perceptual threshold functions are useful in ima...1995
3 Mathews, V. JohnNeural decoding using a nonlinear generative model for brain-computer interfaceKalman filters have been used to decode neural signals and estimate hand kinematics in many studies. However, most prior work assumes a linear system model, an assumption that is almost certainly violated by neural systems. In this paper, we show that adding nonlinearities to the decoding algorithm ...2014-01-01
4 Mathews, V. JohnSubband vector quantization of images using hexagonal filter banksAbstract Results of psychophysical experiments on human vision conducted in the last three decades indicate that the eye performs a multichannel decomposition of the incident images. This paper presents a subband vector quantization algorithm that employs hexagonal filter banks. The hexagonal filte...1992
5 Tasdizen, Tolga; Jones, Bryan W.; Whitaker, Ross T.; Marc, Robert E.Ultrastructural mapping of neural circuitry: a computational frameworkComplete mapping of neuronal networks requires data acquisition at synaptic resolution with canonical coverage of tissues and robust neuronal classification. Transmission electron microscopy (TEM) remains the optimal tool for network mapping. However, capturing high resolution, large, serial sectio...2009
6 Harrison, Reid R.Wireless integrated circuit for 100-channel neural stimulationWe present the design of an integrated circuit for wireless neural stimulation, along with bench-top and in-vivo experimental results. The chip has the ability to drive 100 individual stimulation electrodes with constant-current pulses of varying amplitude, duration, interphasic delay, and repetiti...Wireless; Integrated Neural Interface; Neural recording; Telemetry2008-11
7 Tasdizen, Tolga; Foster, Norman L.Automatic classification of alzheimer's desease vs. frontotemporal dementia: a spatial decision tree aprroach with FDG-PETWe introduce a novel approach for the automatic classification of FDG-PET scans of subjects with Alzheimers Disease (AD) and Frontotemporal dementia (FTD). Unlike previous work in the literature which focuses on principal component analysis and predefined regions of interest, we propose the combined...2008
8 Mathews, V. JohnAn optimal design procedure for intraband vector quantized subband codingAbstTact- Subband coding with vector quantization is addressed in this paper. Forming the data vectors from both between and within the subbands is considered. The former of these two schemes is referred to as interband coding and the latter as intraband coding. Interband coder design is relatively ...1995
9 Harrison, Reid R.HermesC: low-power wireless neural recording system for freely moving primatesNeural prosthetic systems have the potential to restore lost functionality to amputees or patients suffering from neurological injury or disease. Current systems have primarily been designed for immobile patients, such as tetraplegics functioning in a rather static, carefully tailored environment....Brain-machine interface; Low power; Neural prosthetics; Telemetry; Wireless; Neural recording; HermesC2009-08
10 Harrison, Reid R.Versatile integrated circuit for the acquisition of biopotentialsElectrically active cells in the body produce a wide variety of voltage signals that are useful for medical diagnosis and scientific investigation. These biopotentials span a wide range of amplitudes and frequencies. We have developed a versatile front-end integrated circuit that can be used to amp...Biopotential; Neural recording; Electrodes; Amplifier2007-09
11 Tasdizen, Tolga; Jones, Bryan W.; Whitaker, Ross T.Computational framework for ultrastructural mapping of neural circuitryCircuitry mapping of metazoan neural systems is difficult because canonical neural regions (regions containing one or more copies of all components) are large, regional borders are uncertain, neuronal diversity is high, and potential network topologies so numerous that only anatomical ground truth c...2009
12 Harrison, Reid R.Wireless integrated circuit for 100-channel charge-balanced neural stimulationThe authors present the design of an integrated circuit for wireless neural stimulation, along with benchtop and in-vivo experimental results. The chip has the ability to drive 100 individual stimulation electrodes with constant-current pulses of varying amplitude, duration, interphasic delay, and ...Wireless integrated circuit; Low-power2009-12
13 Tasdizen, Tolga; Whitaker, Ross T.Geometric surface smoothing via anisotropic diffusion of normalsThis paper introduces a method for smoothing complex, noisy surfaces, while preserving (and enhancing) sharp, geometric features. It has two main advantages over previous approaches to feature preserving surface smoothing. First is the use of level set surface models, which allows us to process ver...2002
14 Harrison, Reid R.; Tabib-Azar, MassoodMicrocontroller-based wireless recording unit for neurodynamic studies in saltwaterThis paper presents the design of a biocompatible implantable neural-recording unit for Aplysia californica, which is a common sea slug. Low-voltage extracellular neural signals (< 250 μV) are recorded using a high-performance low-power low-noise preamplifier that is packaged with programmable dig...Sea slug; Data acquisition; Implantable; Low-noise amplifier; Low-power circuits; Neural sensor; Telemetry2006-10
15 Harrison, Reid R.; Tabib-Azar, MassoodMicrocontroller-based wireless recording unit for neurodynamic studies in saltwaterThis paper presents the design of a biocompatible implantable neural-recording unit for Aplysia californica, which is a common sea slug. Low-voltage extracellular neural signals (< 250 ?V) are recorded using a high-performance low-power low-noise preamplifier that is packaged with programmable digi...Sea slug; Data acquisition; Implantable; Low-noise amplifier; Low-power circuits; Neural sensor; Telemetry2006-01-01
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