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Publications associées (61)

Multiscale analysis of high resolution digital elevation models using the wavelet transform

At the end of the nineties the emergence of high resolution (1 m) digital elevation models (DEMs) settled the context of high precision geomorphological analysis. These new elevation models permitted to reveal structures that remained heretofore undetectab ...

EPFL2010

A Methodology to Predict Fatigue Life of Cast Iron: Uniform Material Law for Cast Iron

Sinan Korkmaz

Mechanical, physical and manufacturing properties of cast iron make it attractive for many fields of application, such as cranks and cylinder holds. As in design of all metals, fatigue life prediction is an intrinsic part of the design process of structura ...

2010

Global Collisional Gyrokinetic Simulations of ITG Microturbulence Starting from a Neoclassical Equilibrium

Olivier Sauter, Laurent Villard, Stephan Brunner, Trach-Minh Tran, Alberto Bottino, Sébastien Jolliet, Ben McMillan, Thibaut Vernay

Linearized operators describing inter-species and like-species collisions have been discretized and implemented in the gyrokinetic Particle-In-Cell (PIC) code ORB5 [S. Jolliet, Comp. Phys. Comm. 177, 409 ( 2007)] based on the delta-f approach. Simulation r ...

Iop Publishing Ltd, Dirac House, Temple Back, Bristol Bs1 6Be, England2010

Global collisional gyrokinetic simulations of ITG microturbulence starting from a neoclassical equilibrium

Olivier Sauter, Laurent Villard, Stephan Brunner, Trach-Minh Tran, Alberto Bottino, Sébastien Jolliet, Ben McMillan, Thibaut Vernay

Iop Publishing Ltd, Dirac House, Temple Back, Bristol Bs1 6Be, England2010

Comparison between laboratory measurements, simulations, and analytical predictions of the transverse wall impedance at low frequencies

Nicolas Frank Mounet, Benoît Salvant

The prediction of the transverse wall beam impedance at the first unstable betatron line (8kHz) of the CERN Large Hadron Collider (LHC) is of paramount importance for understanding and controlling the related coupled-bunch instabilities. Until now only nov ...

2009

Probing the excitation spectrum of polariton condensates

We propose a four-wave mixing experiment to probe the elementary excitation spectrum of a nonequilibrium Bose-Einstein condensate of exciton-polaritons under nonresonant pumping. Analytical calculations based on mean-field theory show that this method is a ...

2009

Gate insulation and drain current saturation mechanism in InAlN/GaN metal-oxide-semiconductor high-electron-mobility transistors

Nicolas Grandjean, Jean-François Carlin, Eric Feltin, Marcus Gonschorek

The authors investigate 2 mu m gate-length InAlN/GaN metal-oxide-semiconductor high-electron-mobility transistors (MOS HEMTs) with 12 nm thick Al2O3 gate insulation. Compared to the Schottky barrier (SB) HEMT with similar design, the MOS HEMT exhibits a ga ...

2007

On the influence of the shape of randomly oriented, nonconducting inclusions in a conducting matrix on the effective electrical conductivity

Andreas Mortensen, Ludger Weber, Christian Fischer

The influence exerted by the shape of randomly oriented non-conducting inclusions on the electrical conductivity of a metal is investigated using the aluminum-sit icon eutectic alloy. By varying the time and temperature of heat treatment after solidificati ...

2003

Extended states in one-dimensional random potential

We report the first experimental evidence of the existence of extended states in one-dimensional random potentials. Our results are obtained by investigating photoconductivity and optical absorption of GaAs/(AlGa)As disordered superlattices. The experiment ...

1997

Continuous Cultures Limited By A Gaseous Substrate: Development Of A Simple, Unstructured Mathematical Model And Experimental Verification With Methanobacterium Thermoautotrophicum

Urs von Stockar

This contribution presents a simple, unstructured math. model describing microbial growth in continuous culture limited by a gaseous substrate. It has been found that the parameters influencing growth are primarily the gas transfer rate and the diln. rate. ...

1996

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