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CreatorTitleDescriptionSubjectDate
1 Furse, Cynthia M.3D ray-tracing for intra-vehicle environmentsIn order to develop a wireless communication system that could be used for all types of aircraft sensor networks, the severe multipath channel found inside aircrafts must be well defined. This multipath channel is much more complex than usual outdoor/indoor channels and thus far, research has been l...2009
2 Tasdizen, TolgaAutomatic markup of neural cell membranes using boosted decision stumpsTo better understand the central nervous system, neurobiologists need to reconstruct the underlying neural circuitry from electron microscopy images. One of the necessary tasks is to segment the individual neurons. For this purpose, we propose a supervised learning approach to detect the cell membra...2009
3 Stevens, KennethCharacterization of asynchronous templates for integration into clocked CAD flowsAsynchronous circuit design can result in substantial benefits of reduced power, improved performance, and high modularity. However, asynchronous design styles are largely incompatible with clocked CAD, which has prevented wide-scale adoption. The key incompatibility is timing. Thus most commercial...2009
4 Stevens, KennethClocked and asynchronous FIFO characterization and comparisonHeterogeneous blocks, IP reuse, network-on-chip interconnect, and multi-frequency design are becoming more prevalent in integrated circuit design. Communication amongst these blocks typically employs first-in-first-out (FIFO) buffering for flow control. This paper characterizes and evaluates severa...2009
5 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
6 Khan, Faisal HabibHybrid electric vehicle power management solutions based on isolated and nonisolated configurations of multilevel modular capacitor-clamped converterAbstract-This paper presents the various configurations of a multilevel modular capacitor-clamped converter (MMCCC), and it reveals many useful and new formations of the original MMCCC for transferring power in either an isolated or nonisolated manner. The various features of the original MMCCC circ...2009
7 Myers, Chris J.; Jones, KevinNew verification method for embedded systemsAbstract-Verification of embedded systems is complicated by the fact that they are composed of digital hardware, analog sensors and actuators, and low level software. In order to verify the interaction of these heterogeneous components, it would be beneficial to have a single modeling formalism that...2009
8 Stevens, KennethPower reduction through physical placement of asynchronous routersOur work reduces power consumption by minimizing wirelength and hop-count of an asynchronous NoC using simulated annealing and force-directed algorithms. Asynchronous NoCs (aNoCs) can provide important benefits over clocked NoCs. However, there is little published research on generating a custom, ...2009
9 Tasdizen, TolgaPrincipal neighborhood dictionaries for nonlocal means image denoisingWe present an in-depth analysis of a variation of the nonlocal means (NLM) image denoising algorithm that uses principal component analysis (PCA) to achieve a higher accuracy while reducing computational load. Image neighborhood vectors are first projected onto a lower dimensional subspace using PC...2009
10 Stevens, KennethRadiation hardening by design of asynchronous logic for hostile environmentsA wide range of emerging applications is driving the development of wireless sensor node technology towards a monolithic system-on-a-chip implementation. Of particular interest are hostile environment scenarios where radiation and thermal extremes exist. Radiation hardening by design has been recogn...2009
11 Harrison, Reid R.Revolution will be prosthetizedIt's October at Duke University, in Durham, N.C., and Jonathan Kuniholm is playing "air guitar hero," a variation on Guitar Hero, the Nintendo Wii game that lets you try to keep up with real musicians using a vaguely guitarlike controller. But the engineer is playing without a guitar. More to the p...2009
12 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
13 Tasdizen, Tolga; Terry, Christi M.; Cheung, Alfred K.; Kirby, Robert Michael IIUsing the stochastic collocation method for the uncertainty quantification of drug concentration due to depot shape variabilityNumerical simulations entail modeling assumptions that impact outcomes. Therefore, characterizing, in a probabilistic sense, the relationship between the variability of model selection and the variability of outcomes is important. Under certain assumptions, the stochastic collocation method offers ...2009
14 Furse, Cynthia M.Biomedical telemetry: today's opportunities and challengesBiomedical telemetry is used today to communication with cardiac devices, insulin pumps, and a few other implantable devices that are on the order of 1-2" in diameter. Future systems promise advanced communication with cardiac, optical, neurological and auditory devices that are on the order of a ce...2009-03
15 Furse, Cynthia M.Capacitance and inductance sensor circuits for detecting the lengths of open- and short-circuited wiresThe length of an open- or short-circuited wire is linearly proportional to the capacitance or inductance of the wire, respectively. Several types of simple and inexpensive circuits are introduced to measure these values. Open-circuited (capacitance) measurements are very effective. Short-circuited ...Aging aircraft wire; Capacitance sensors; Fault detection; Inductance sensors2009-08
16 Khan, Faisal HabibChallenges and solutions in measuring computer power supply efficiency for 80 PLUS® certificationThis paper discusses the techniques, challenges, and results of measuring computer power supply (CPS) efficiency, power factor (PF), and input harmonic currents for the 80 PLUS® program since its beginning in 2002. To date, over 750 power supplies have been tested with many certified for the 80 PL...2009-02
17 Furse, Cynthia M.Feasibility of reflectometry for nondestructive evaluation of prestressed concrete anchorsConcrete dams and other large civil structures utilize steel cable anchors to improve strength and stability. Reflectometry methods that have been used for location of faults in electrical systems are examined as a possible method for location and quantization of possible deterioration on concrete ...Concrete anchors; Steel cable anchors; Reflectometry; Nondestructive evaluation; Spectral time-domain reflectometry2009-11
18 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
19 Harrison, Reid R.Influence of system integration and packaging on its inductive power link for an integrated wireless neural interfaceIn an integrated wireless neural interface based on the Utah electrode array, the implanted electronics are supplied with power through inductive coupling between two coils. This inductive link is affected by conductive and dielectric materials and media surrounding the implant coil. In this study,...Coils; Inductive coupling; Integration; Neural interface Packaging; Quality factor; Resonance frequency; Utah electrode array (UEA); Parylene2009-12
20 Harrison, Reid R.Measuring neural correlates of insect escape behaviors using a miniature telemetry systemThe firing patterns of visual neurons tracking approaching objects need to be translated into appropriate motor activation sequences to generate escape behaviors. Locusts possess an identified neuron highly sensitive to approaching objects (looming stimuli), thought to play an important role in ...Escape behaviors; Collision avoidance; Looming stimuli; Lobula Giant Motion Detector (LGMD); Telemetry2009-04
21 Khan, Faisal HabibMultiple-load-source integration in a multilevel modular capacitor-clamped DC-DC converter featuring fault tolerant capabilityA multilevel modular capacitor-clamped dc-dc converter (MMCCC) will be presented in this paper with some of its advantageous features. By virtue of the modular nature of the converter, it is possible to integrate multiple loads and sources with the converter at the same time. The modular construct...DC-DC power conversion; Power capacitors; Power conversion; Power MOSFETs; Capacitor-clamped converter2009-01
22 Khan, Faisal HabibSwitching cells and their implications for power electronic circuitsThis paper will introduce two basic switching cells, P-cell and N-cell, along with their implications and applications in power electronic circuits. The concept of switching cells in power electronic circuits started in the late 1970's. The basic cells presented in this paper have one switching ele...2009-05
23 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
24 Harrison, Reid R.Wireless neural recording with single low-power integrated circuitWe present benchtop and in vivo experimental results from an integrated circuit designed for wireless implantable neural recording applications. The chip, which was fabricated in a commercially available 0.6- m 2P3M BiCMOS process, contains 100 amplifiers, a 10-bit analog-to-digital converter (ADC...2009-08
25 Harrison, Reid R.Brain-machine interface, unpluggedIn experiments and even limited human clinical trials, electrode arrays implanted on the brain's surface have given monkeys and humans the ability to move objects with their thoughts. The experiments are proof that brain-computer interfaces could improve the lives of severely paralyzed people. But...Wireless neural implants; Brain-computer interface2009-01-01
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