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CreatorTitleDescriptionSubjectDate
476 Khan, Faisal HabibStart-up and dynamic modeling of the multilevel modular capacitor-clamped converterThis paper will present the analytical proof of concept of the multilevelmodular capacitor-clamped converter (MMCCC). The quantitative analysis of the charge transfer mechanism among the capacitors of the MMCCC explains the start-up and steadystate voltage balancing. Once these capacitor voltages a...2010-02
477 Furse, Cynthia M.; Gandhi, Om P.State of the science regarding RF dosimetry, measurement and certificationCellular telephones and wireless personal communication systems (PCS) are being introduced into society at a very rapid rate. Whereas the present-day cellular telephones in the United States operate at midband transmission frequencies of about 835 MHz (about 900 MHz in Europe), higher frequencies o...RF dosimetry; Cell phone safety1996
478 Furse, Cynthia M.Statistical comparison of capacity predictions for realistic MIMO channelsThe impact of antenna polarization on channel capacity is explored in multiple-input, multiple-output (MIMO) systems. An idealized polarization model involving branch power rations (BPR's) and channel cross-coupling is incorporated into channel-specific capacity calculations. Results are compared f...2007-01-01
479 Tasdizen, Tolga; Hansen, Charles D.Statistically quantitative volume visualizationVisualization users are increasingly in need of techniques for assessing quantitative uncertainty and error in the images produced. Statistical segmentation algorithms compute these quantitative results, yet volume rendering tools typically produce only qualitative imagery via transfer functionbase...2005
480 Stringfellow, Gerald B.Step structure and ordering in GaInPPresents information from an experiment on the step structure and ordering in GalnP. Information on the step spacing and degree of order in the epitaxial layers; Details on the experiment; Results from the experiment.Physics; Ordering; Steps1998
481 Stringfellow, Gerald B.Step structure and ordering in Te-doped GaInPThe step structure and CuPt ordering in GaInP layers grown by organometallic vapor phase epitaxy on singular GaAs substrates have been investigated as a function of Te (DETe) doping using atomic force microscopy, and electrical and optical properties measurements. The degree of order decreases for T...Surfaces; Te doping; Bandgap energy1998
482 Stringfellow, Gerald B.Step structure and ordering in Zn-doped GaInPPresents the results of a study of Zinc dopant effects on both step structure and ordering in GaInP in an effort to further clarify the disordering mechanism. Comparison of the results obtained for Zinc with those reported for tellurium; Experiment; Results; Discussion; Conclusion.Gallium Compounds; Zinc; Ordering1999
483 Myers, Chris J.Stochastic cycle period analysis in timed circuitsThis paper presents the stochastic cycle period as a performance metric for timed asynchronous circuits. The stochastic cycle period is a sum of weighted delays whose value represents the expected delay of a single cycle in the specification. Each weight denotes the amount of time a delay contribute...1999
484 Myers, Chris J.Stochastic cycle period analysis in timed circuitsThis paper presents a technique to estimate the stochastic cycle period (SCP), a performance metric for timed asynchronous circuits. This technique uses timed stochastic Petri nets (TSPN) which support choice and arbitrary delay distributions. The SCP is the delay of the average path in a TSPN when ...1999
485 Furse, Cynthia M.Stochastic FDTD for analysis of statistical variation in electromagnetic fieldsThis paper describes a new stochastic finite difference time domain (S-FDTD) method for calculating the variance in the electromagnetic fields caused by variability or uncertainty in the electrical properties of the materials in the model. Details of the 1D derivation using truncated Taylor series a...2012-01-01
486 Mathews, V. JohnStochastic gradient adaptive filters with gradient adaptive step sizesThis paper presents two adaptive step-size gradient adaptive filters. The step sizes are changed using a gradient descent algorithm designed to minimize the squared estimation error. The first algorithm uses the same step-size sequence for all the filter coefficients whereas the second algorithm use...1990
487 Mathews, V. JohnStochastic mean-square performance analysis of an adaptive Hammerstein filterABSTRACT This paper presents an almost sure (a.s.) mean-square performance analysis of an adaptive Hammerstein filter for the case when the measurement noise in the desired response signal is a martingale difference sequence. The system model consists of a series connection of a memoryless nonlinea...2004
488 Mathews, V. JohnStochastic mean-square performance analysis of an adaptive Hammerstein filterAbstract-This paper presents an almost sure mean-square performance analysis of an adaptive Hammerstein filter for the case when the measurement noise in the desired response signal is a martingale difference sequence. The system model consists of a series connection of a memoryless nonlinearity fol...2006
489 Stringfellow, Gerald B.Strain-enhanced doping in semiconductors: effects of dopant size and charge stateWhen a semiconductor host is doped by a foreign element, it is inevitable that a volume change will occur in the doped system. This volume change depends on both the size and charge state difference between the dopant and the host element. Unlike the ‘‘common expectation'' that if the host is de...2010-11
490 Mathews, V. JohnSubband particle filtering for speech enhancementABSTRACT Particle filters have recently been applied to speech enhancement when the input speech signal is modeled as a time-varying autoregressive process with stochastically evolving parameters. This type of modeling results in a nonlinear and conditionally Gaussian statespace system that is not ...2006
491 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
492 Simpson, Jamesina J.Subdiffraction optical resolution of a gold nanosphere located within the nanojet of a Mie-resonant dielectric microsphereWe theoretically investigate light scattering from a bi-sphere system consisting of a gold nanosphere and a lossless dielectric microsphere illuminated at a resonant optical wavelength of the microsphere. Using generalized multisphere Mie theory, we find that a gold nanosphere 100 times smaller than...2007-01-01
493 Simpson, Jamesina J.Substrate integrated waveguides optimized for ultrahigh-speed digital interconnectsThis paper reports an experimental and computational study of substrate integrated waveguides (SIWs) optimized for use as ultrahigh-speed bandpass waveguiding digital interconnects. The novelty of this study resides in our successful design, fabrication, and testing of low-loss SIWs that achieve 100...2006-01-01
494 Mathews, V. JohnSufficient stability bounds for slowly varying direct-form recursive linear filters and their applications in adaptive IIR filtersAbstract-This correspondence derives a sufficient time-varying bound on the maximum variation of the coefficients of an exponentially stable time-varying direct-form homogeneous linear recursive filter. The stability bound is less conservative than all previously derived bounds for time-varying IIR ...1999
495 Simpson, Jamesina J.Super-enhanced optical energy concentration through a subwavelength aperture using a photonic nanojetOptical transmission through resonant subwavelength apertures in optically thick metal films have received an explosion of interest for their ability to overcome the diffraction limit of light and concentrate light efficiently into a subwavelength volume. This achievement has attracted the use of su...2014-01-01
496 Stringfellow, Gerald B.Surface photo-absorption studies of the chemical structure of GaInP grown by organometallic vapor phase epitaxyThe surface structure of Ga0.52In0.48P was studied by surface photoabsorption. An absorption peak due to P dimers on Ga0.52In0.48P was observed at 400 nm, shorter than for InP (430 nm). From comparison with results for GaAs and InP, the data are interpreted to indicate that at a tertiarybutylphos...Absorption peak; Ordering; Substrate orientation1995
497 Stringfellow, Gerald B.Surface photoabsorption study of the effect of substrate misorientation on ordering in GaInPSubstrate orientation strongly affects Cu-Pt ordering in Ga0.5In0.5P layers grown by organometallic vapor phase epitaxy. In situ surface photoabsorption SPA measurements were used to measure the concentration of 1 10-oriented P dimers, characteristic of the 2 4 reconstructed surface, as a functio...P-dimer concentration; Photoluminescence measurements; Surface reconstruction1996-04-15
498 Stringfellow, Gerald B.Surface photoabsorption study of the effect of V/III ratio on ordering in GaInPCu-Pt ordering is widely observed in Ga0.5In0.5P layers grown by organometallic vapor phase epitaxy. The degree of order is a strong function of the input partial pressure of the phosphorus precursor, i.e., the V/III ratio, during growth. By observing the surface structure using in situ surface p...Degree of order; Photoluminescence; Transmission electron microscopy1996
499 Stringfellow, Gerald B.Surface photoabsorption study of the effects of growth temperature and V/III ratio on ordering in GaInPSurface photoabsorption (SPA) measurements were used to clarify the Cu-Pt ordering mechanism in Ga0.5In0.5P layers grown by organometallic vapor phase epitaxy. The Cu-Pt ordering is strongly affected by the growth temperature and the input partial pressure of the phosphorus precursor, i.e., the V/II...P-dimer concentration; Oriented phosphorus dimers; Surface reconstruction1996-05-01
500 Stringfellow, Gerald B.Surface photoabsorption transients and ordering in GaInPHeterostructures and quantum wells can be produced in GaInP without changing the solid composition by simply varying the order parameter. Since CuPt ordering reduces the band-gap energy, changes in the order parameter induced by changes in growth conditions result in heterostructures with band-ga...Order parameters; Quantum wells; P-dimers1998-03-15
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