Filters: Department: "Electrical & Computer Engineering" School Or College: "College of Engineering" Collection: "ir_uspace"
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 451 |
 |
Stevens, Kenneth | Relative timing based verification of timed circuits and systems | Aggressive timed circuits, including synchronous and asynchronous self-resetting circuits, are particularly challenging to design and verify due to complicated timing constraints that must hold to ensure correct operation. Identifying a small, sufficient, and easily verifiable set of relative timin... | 2002 | |
| 452 |
 |
Khan, Faisal Habib | Reliability analysis and performance degradation of a boost converter | In general, power converters are operated in closed-loop systems, and any characteristic variations in one component will simultaneously alter the operating point of other components, resulting in a shift in overall reliability profile. This interdependence makes the reliability of a converter a com... | 2014-01-01 | |
| 453 |
 |
Khan, Faisal Habib | Reliability analysis and performance degradation of a boost converter | In general, power converters are being operated in closed-loop systems, and any characteristic variations in one component will simultaneously alter the operating point of other components resulting in a shift in overall reliability profile. This interdependence makes the reliability of a converter ... | 2013-01-01 | |
| 454 |
 |
Harrison, Reid R. | Revolution will be prosthetized | It'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 | |
| 455 |
 |
Mathews, V. John; Varner, Michael W.; Clark, Edward B. | Robust estimation of fetal heart rate variability using doppler ultrasound | Abstract-This paper presents a new measure of heart rate variability (HRV) that can be estimated using Doppler ultrasound techniques and is robust to variations in the angle of incidence of the ultrasound beam and the measurement noise. This measure employs the multiple signal characterization (MUSI... | 2003 | |
| 456 |
 |
Mathews, V. John; Clark, Edward B. | Robust estimation of fetal heart rate variability using doppler ultrasound | ABSTRACT Heart rate variability (HRV) provides important information about the development of the cardiovascular system in fetuses. This paper presents a new measure of fetal HRV that can be estimated using Doppler ultrasound techniques. This measure employs the multiple signal characterization (MU... | 2003 | |
| 457 |
 |
Varner, Michael W.; Clark, Edward B.; Fernando, Kumari L.; Mathews, V. John | Robust estimation of fetal heart rate variability using Doppler ultrasound. | This paper presents a new measure of heart rate variability (HRV) that can be estimated using Doppler ultrasound techniques and is robust to variations in the angle of incidence of the ultrasound beam and the measurement noise. This measure employs the multiple signal characterization (MUSIC) algori... | Prenatal Ultrasonography; Fetal Heart Rate; Blood Flow Velocity; Algorithms | 2003-08 |
| 458 |
 |
Furse, Cynthia M. | Robust multicarrier spread spectrum technique for data transmission over partially jammed channels | Multicarrier spread spectrum (MC-SS) is an altemative to the conventional spread spectrum (SS) techniques that behaves significantly better when the system is subject to narrow- or partial-band interference. However; successful implementation of the optimum detector requires knowledge of noise ... | Multicarrier spread spectrum; MC-SS; Jamming; Jammed channels | 2004-01-01 |
| 459 |
 |
Stringfellow, Gerald B. | Sb enhancement of lateral superlattice formation in GaInP | Epitaxial layers of GaInP were grown by organometallic vapor phase epitaxy with small amounts of TESb added to control the surface bonding. Above a concentration of Sb/III(v)=0.016, 12 K photoluminescence measurements show that the band gap is reduced, as compared to completely disordered GaInP, by ... | Tin; Epitaxy; Photoluminescence | 2001 |
| 460 |
 |
Stevens, Kenneth | Scalable asynchronous hardware protocol verification for compositions with relative timing | Correct interaction of asynchronous hardware protocols requires verification. Performance and power of asynchronous hardware circuits and protocols can be vastly improved by modifying them with judicious application of timing constraints. A methodology is presented for verifying larger asynchronous ... | 2010 | |
| 461 |
 |
Furse, Cynthia M. | Scaling the response of nanocrescent antennas into the ultraviolet | We investigate the scaling of nanocrescent antennas for applications at UV wavelengths. These antennas have been extensively studied at infrared wavelengths due to their relative ease of fabrication [1] and tunability [2] via nanosphere template lithography. Their response at UV wavelengths, however... | 2014-01-01 | |
| 462 |
 |
Tasdizen, Tolga | Segmentation of haematopoeitic cells in bone marrow using circle detection and splitting techniques | Bone marrow evaluation is indicated when peripheral blood abnormalities are not explained by clinical, physical, or laboratory findings. In this paper, we propose a novel method for segmentation of haematopoietic cells in the bone marrow from scanned slide images. Segmentation of clumped cells is a ... | 2012-01-01 | |
| 463 |
 |
Furse, Cynthia M. | Selection criteria of test signals for correlation-based wire fault analysis (preprint) | This paper compares reflectometry signals for location of intermittent faults on live electrical cables. STDR, SSTDR, linear chirp, quadratic chirp, concave-up chirp, convex-down chirp and all frequency randomized phase noise signals were tested. The SSTDR was observed to be the most effective sig... | 2006 | |
| 464 |
 |
Tasdizen, Tolga | Serial section registration of axonal confocal microscopy datasets for long-range neural circuit reconstruction | In the context of long-range digital neural circuit reconstruction, this paper investigates an approach for registering axons across histological serial sections. Tracing distinctly labeled axons over large distances allows neuroscientists to study very explicit relationships between the brain's com... | 2012-01-01 | |
| 465 |
 |
Harrison, Reid R. | Signal amplification, detection and transmission in a wireless 100-electrode neural recording system | We are developing a fully-implantable neural recording system with wireless power and data transfer. As part of this system, we have developed a low-power integrated circuit that performs power rectification and and regulation, reception of configuration data, neural signal amplification and filt... | 2006 | |
| 466 |
 |
Normann, Richard A.; Abbasi, Masoud; Johansson,Torbjorn | Silicon carbide enhanced thermomigration | The widespread acceptance of thermomigration technology to produce through-chip interconnects has been impaired by (i) a random walk of the Si-Al liquid eutectic inclusion as it traverses the wafer, and (ii) a ?surface barrier? which allows thermomigration of only relatively large inclusions. In ... | Silicon Dioxide; Thermometers; Transducers; Thermomigration Technology; Infrared Lamps | 1992 |
| 467 |
 |
Harrison, Reid R. | Silicon implementation of the fly's optomotor control system | Flies are capable of stabilizing their body during free flight by using visual motion information to estimate self-rotation. We have built a hardware model of this optomotor control system in a standard CMOS VLSI process. The result is a small, low-power chip that receives input directly from the r... | Optomotor control system; photoreceptors; Insect visual system; Motion detector; CMOS transistor | 2000-01-01 |
| 468 |
 |
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 array | A 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 Array | 1991 |
| 469 |
 |
Furse, Cynthia M.; Gandhi, Om P. | Simple convolution procedure for calculating currents induced in the human body for exposure to electromagnetic pulses | The finite-difference time-domain (FDTD) and frequency dependent finite difference time-domain (FD)2TD methods have been previously used to calculate internal electric (E) fields and induced currents for exposure of the anatomically based model of the human body to electromagnetic pulses (EMPs) and... | Frequency dependent finite difference time-domain; Finite-difference time-domain; FDTD; Electric fields; Induced current; Electromagnetic pulses; Continuous wave sinusoids | 1994-07 |
| 470 |
 |
Stringfellow, Gerald B. | Simulation of self-assembled compositional core-shell structures in In xGa 1-xN nanowires | We report the simulation of compositional core-shell structure formation in epitaxial InGaN nanowires (NWs) and its dependence on kinetic growth mode and epitaxial relation to substrate, based on atomistic-strain-model Monte Carlo simulations. On a lattice mismatched substrate, the layer-by-layer gr... | 2012-01-01 | |
| 471 |
 |
Harrison, Reid R. | Single-chip CMOS visual orientation sensor | We present a single-chip, low-power vision sensor capable of measuring local edge orientation across a wide field of view. The sensor was fabricated in a 0.5-µm CMOS process. Quadratic spatial filters were implemented using differential pairs and an "antibump" circuit to give a current-mode out... | Low-power; Vision sensor; CMOS | 2004-01-01 |
| 472 |
 |
Stringfellow, Gerald B. | Solid phase immiscibility in GaInN | The large difference in interatomic spacing between GaN and InN is found to give rise to a solid phase miscibility gap. The temperature dependence of the binodal and spinodal lines in the Ga1xInxN system was calculated using a modified valence-force-field model where the lattice is allowed to relax ... | Interatomic spacing; Valence-force field; epitaxial growth | 1996 |
| 473 |
 |
Stringfellow, Gerald B.; Williams, Clayton C. | Spatial mapping of ordered and disordered domains of GaInP by near-field scanning optical microscopy and scanning capacitance microscopy | Imaging of topography, locally induced photoluminescence and Fermi-level pinning in adjacent ordered and disordered domains on a cleaved GaInP sample is performed using a near-field scanning optical microscope and scanning capacitance microscope at room temperature in air. Highly localized photolumi... | Gallium Phosphides; Surface Structure; Photoluminescence | 1996-04-13 |
| 474 |
 |
Mathews, V. John | Spectral leakage suppression properties of linear and quadratic windowing | Abstract-It is shown that the leakage suppression properties of segment averaging spectrum estimation methods using hear windows and equivalent quadratic windows are asymptotically the same, under the assumption that segments relatively far apart are uncorrelated. Thus, for large data lengths, one ... | 1984 | |
| 475 |
 |
Stringfellow, Gerald B. | Spectroscopic study of surfactant enhanced organometallic vapor phase epitaxy growth of GaInP | Samplen s of GaxIn1-xP grown by organometallic vapor phase epitaxy on (001) GaAs substrates by addition of TESb demonstrating a lateral superlattice compositional modulation (CM) have been studied by low temperature polarized photoluminescence (PL), power dependent PL, and photoluminescence excitati... | Organometallic vapor; Photoluminescence excitation; Spectroscopy | 2001 |