UScholar Works
 
Filters: Department: "Electrical & Computer Engineering" Collection: "ir_uspace"
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CreatorTitleDescriptionSubjectDate
201 Stringfellow, Gerald B.Bandgap control of GaInP using Sb as a surfactantThe use of surfactants to control specific aspects of the vapor-phase epitaxial growth process is beginning to be studied for both the elemental and III/V semiconductors. To date, most reported surfactant effects for semiconductors relate to the morphology of the growing films. However, semicondu...Band-gap energy; Growth process; Epitaxial growth1999-09-27
202 Mathews, V. JohnPerceptually lossless image compressionThere are many instances in which human observers are the final judges of the quality of a compressed image. In such situations, it is useful to incorporate a model of the human visual system (HVS) into the image compression system in order to reduce or even eliminate the visual distortions introdu...1997
203 Stevens, KennethSynchronous elasticization: considerations for correct implementation and miniMIPS case studyLatency insensitivity is a promising design paradigm in the nanometer era since it has potential benefits of increased modularity and robustness to variations. Synchronous elasticization is one approach (among others) of transforming an ordinary clocked circuit into a latency insensitive design. Th...2010
204 Furse, Cynthia M.Three-dimensional electromagnetic power deposition in tumors using interstitial antenna arraysAbstract-Interstitial arrays of insulated antennas have shown promise for microwave hyperthermia treatment of deep-seated tumors. Available analytical techniques for predicting the electromagnetic (EM) power deposition of these antennas have been limited to the case of a homogeneous conductive mediu...1989-10
205 Furse, Cynthia M.Multicarrier reflectometryA new reflectometry method called multicarrier reflectometry (MCR) for fault location in cables is proposed. MCR combines a weighted set of sinusoidal excitations into a signal that is sent down the wire. The reflected signal from the cable under test is analyzed in order to determine the length of ...Multicarrier reflectometry; MCR; Fault location2006-06
206 Myers, Chris J.Learning genetic regulatory network connectivity from time series dataAbstract-Recent experimental advances facilitate the collection of time series data that indicate which genes in a cell are expressed. This information can be used to understand the genetic regulatory network that generates the data. Typically, Bayesian analysis approaches are applied which neglect ...2011
207 Khan, Faisal HabibGenerating isolated outputs in a multilevel modular capacitor clamped DC-DC converter (MMCCC) for hybrid electric and fuel cell vehiclesThis paper presents a new technique to obtain isolated dc voltage outputs from a capacitor clamped dc-dc converter. The multilevel modular capacitor clamped converter (MMCCC) has several key features that make it possible to generate ac outputs (10 kHz) from a dc-dc converter circuit. Using those h...2008-01-01
208 Harrison, Reid R.Validation of adaptive threshold spike detector for neural recordingWe compare the performance of algorithms for automatic spike detection in neural recording applications. Each algorithm sets a threshold based on an estimate of the background noise level. The adaptive spike detection algorithm is suitable for implementation in analog VLSI; results from a proof-of-...Spike detection; Neural recording; Ation potential; VLSI2004-01-01
209 Stringfellow, Gerald B.Effects of low surfactant Sb coverage on Zn and C incorporation in GaPThe use of surfactants during the vapor phase growth of III-V materials to control fundamental characteristics of epitaxial layers is becoming increasingly important. We have investigated the remarkable effects of Sb, from triethylantimony (TESb) Pyrolysis, on the Zn doping during the organometallic...Surfactants; Organometallic vapor phase epitaxy; Gallium phosphide2007
210 Stringfellow, Gerald B.Effects of V/III ratio on ordering and antiphase boundaries in GaInP layersTransmission electron microscope (TEM) and transmission electron diffraction (TED) studies have been performed to investigate the effects of V/III ratio on ordering and antiphase boundaries (APBs) in organometallic vapor phase epitaxial Ga0.5In0.5P layers grown onto (001) GaAs vicinal substrates ...Antiphase boundaries; APB; Heterostructures; Organometallics1997
211 Mathews, V. JohnAdaptive realizations of the maximum likelihood processor for time delay estimationAbstract-This correspondence introduces an adaptive realization of the maximum likelihood (ML) processor for time delay estimation (TDE). Also presented is a modified ML processor, which requires less computations but still performs better than the other when implemented in an adaptive way. Widrow'...1984
212 Mathews, V. John; Varner, Michael W.; Clark, Edward B.Robust estimation of fetal heart rate variability using doppler ultrasoundAbstract-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
213 Khan, Faisal HabibMultiple load-source integration in a multilevel modular capacitor clamped DC-DC converter featuring fault tolerant capabilityAbstract-A 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 to the converter at the same time. The modular con...2007
214 Mathews, V. JohnMultiplication-free vector quantization using the L l distortion measure and its variantsVector quantization is a very powerful technique for data compression and consequently, it has attracted a lot of attention lately. One major drawback associated with this approach is its extreme computational complexity. This paper first considers vector quantization that uses the L1 distortion mea...1989
215 Myers, Chris J.Interfacing synchronous and asynchronous modules within a high-speed pipelineAbstract-This paper describes a new technique for integrating asynchronous modules within a high-speed synchronous pipeline. Our design eliminates potential metastability problems by using a clock generated by a stoppable ring oscillator, which is capable of driving the large clock load found in pre...2000
216 Myers, Chris J.Synthesis of speed independent circuits based on decompositionThis paper presents a decomposition method for speedindependent circuit design that is capable of significantly reducing the cost of synthesis. In particular, this method synthesizes each output individually. It begins by contracting the STG to include only transitions on the output of interest and ...2004
217 Myers, Chris J.Automatic derivation of timing constraints by failure analyisAbstract. This work proposes a technique to automatically obtain timing constraints for a given timed circuit to operate correctly. A designated set of delay parameters of a circuit are first set to sufficiently large bounds, and verification runs followed by failure analysis are repeated. Each ver...2002
218 Furse, Cynthia M.Predicted MIMO performance in intra-vehicle channelsWireless sensor networks inside vehicles face particularly harsh multipath and shadowing constraints. The closed or semi-closed metallic structure functions much like a reverberation chamber, but with some regions shielded from other regions. Vehicles (particularly aircraft) often have extremely hig...2008-07
219 Harrison, Reid R.Micropower circuits for bidirectional wireless telemetry in neural recording applicationsState-of-the art neural recording systems require electronics allowing for transcutaneous, bidirectional data transfer. As these circuits will be implanted near the brain, they must be small and low power. We have developed micropower integrated circuits for recovering clock and data signals over ...Micropower circuits; Neural recording systems; Low-power CMOS circuits, RF telemetry; Transcutaneous data link; Transmitter2005-01-01
220 Ziegenfuss, DonnaA Busy Professor's Guide to Sanely Flipping Your ClassroomThe Flipped Classroom has become a popular teaching method. Students watch video lectures before class, saving class time for active learning (problem solving, demonstrations, applications, etc.). This paper is a useful guide for busy professors who would like to try out the flipped classroom approa...flipped classroom; inverted classroom; engineering education; teaching electromagnetics; assessment pedagogy2019
221 Hendee, Shonn P.; Faour, Fouad A.; Christensen, Douglas A.; Patrick, Baharah; Durney, Carl H.; Blumenthal, Donald K.Effects of weak extremely low frequency magnetic fields on calcium/calmodulin interactions.Mechanisms by which weak electromagnetic fields may affect biological systems are of current interest because of their potential health effects. Lednev has proposed an ion parametric resonance hypothesis (Lednev, 1991, Bioelectromagnetics, 12:71-75), which predicts that when the ac, frequency of a c...Electromagnetic Fields; Calcium-binding Proteins; Lednev's Theory1996-06
222 Stringfellow, Gerald B.Nonequilibrium composition profiles of alloy quantum dots and their correlation with the growth modeEquilibrium composition profiles (CPs) of epitaxial alloy quantum dots (QDs) are well established theoretically. However nonequilibrium CPs may occur experimentally. Using an atomistic-strain-model Monte Carlo simulation method, we demonstrate a striking correlation between the nonequilibrium CPs of...2011
223 Stringfellow, Gerald B.Fundamentals of vapor phase epitaxial growth processesThe first success with the growth of semiconductor materials by vapor phase epitaxy (VPE) dates back to the 1950's. Today, it is the largest volume technique for the production of both Si and HI/V electronic and photonic devices. Of course, commercial processes for the growth of Si layers, dielectri...Vapor phase epitaxy; Surfactants2007
224 Furse, Cynthia M.Faster than fourier -- ultra-efficient time-to-frequency domain conversions for FDTDTwo highly efficient methods of computing magnitude and phase from time-domain data are demonstrated. These methods, based on solution of linear equations, are found to be equally accurate and more efficient than Fourier transform methods (DIT and FFT) for limited numbers of Frequencies. These metho...Finite-difference time-domain method; FDTD; Fourier transform methods; Sine wave magnitude; Sine wave phase1998
225 Harrison, Reid R.; Myers, Chris J.; Schlegel, ChristianAnalog decoding of product codesA design approach is presented for soft-decision decoding of block product codes ("block turbo codes") using analog computation with MOS devices. Application of analog decoding to large code sizes is also considered with the introduction of serial analog interfaces and pipeline schedules.2001-01-11
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