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Stochastic Resonance In A Balanced Pair Of Single-Electron Boxes

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High performance solar blind detectors based on AlGaN grown by MBE and MOCVD

Nicolas Grandjean, Mauro Mosca

Solar blind detectors based on AlGaN grown by Molecular Beam Epitaxy and Metal Organic Vapor Phase Epitaxy have been fabricated and characterized. Metal Semiconductor Metal (MSM) detectors and vertical Schottky detectors have been realized, with a design t ...

Materials Research Society2003

Entropy-based Multi-stream Combination

Hervé Bourlard, Hemant Misra, Vivek Tyagi

Full-combination multi-band approach has been proposed in the literature and performs well for band-limited noise. But the approach fails to deliver in case of wide-band noise. To overcome this, multi-stream approaches are proposed in literature with varyi ...

IDIAP2002

Microphone Array Post-filter based on Noise Field Coherence

Hervé Bourlard

This article introduces a novel technique for estimating the signal power spectral density to be used in the transfer function of a microphone array post-filter. The technique is a generalisation of the existing Zelinski post-filter, which uses the auto- a ...

IDIAP2001

High performance solar blind detectors based on AlGaN grown by MBE on Si

Nicolas Grandjean

Solar blind metal-semiconductor-metal detectors have been fabricated based on AlGaN grown on Si by molecular beam epitaxy. Some devices were fabricated by electron beam lithography, We present the device characterization and performance, that includes a no ...

2001

Wavelet thresholding for multiple noisy images

Martin Vetterli

This correspondence addresses the recovery of an image from its multiple noisy copies. The standard method is to compute the weighted average of these copies. Since the wavelet thresholding technique has been shown to effectively denoise a single noisy cop ...

2000

Automatic, localized in vivo adjustment of all first- and second-order shim coils

Rolf Gruetter

The implementation of a "fast, automatic shimming technique by mapping along projections" (FASTMAP) on a 2.1-Tesla whole-body system is described. The method provides a localized adjustment of all first- (X, Y, Z) and second-order (Z2, ZX, ZY, X2-Y2, 2XY) ...

Wiley-Blackwell1993

Ion Temperature-Measurements in a Tokamak by Collective Thomson Scattering

Basil Duval, Jonathan Bryan Lister, Antoine Pochelon, Roland Behn, Markus Siegrist

Collective Thomson scattering, using a high-power pulsed D2O laser at 385-mu-m and a heterodyne receiver system, has provided local ion temperature (T(i)) measurements of the plasma in the tokamak chauffage Alfven (TCA) tokamak. Recent improvements in the ...

1991

Valence State of Copper in Nd2-Xcexcuo4

Giorgio Margaritondo

New photoemission data are presented for a series of Ce-doped or undoped, reduced or nonreduced, Nd cuprates. The data, taken with high signal-to-noise level in the constant-initial-state mode, demonstrate the presence of Cu+, in contrast with previous pho ...

1991

Processus aléatoires dans un réacteur nucléaire contrôlé par un dispositif de réglage

A stochastic model of a reactor with a control rod is studied here. By assimilating populations of neutrons, of precursors and of absorbing atoms associated with control rod displacements to markovian random variables, the Chapman-Kolmogorov equation is es ...

s.n.1972