Concept

Élastographie

Publications associées (64)

Stiffness tomography by atomic force microscopy

A method of analyzing a sample with a probe based measurement instrument using stiffness tomography. Stiffness or elastic modulus data obtained through contact measurement with the sample as a function of depth is used in the detection of features, particu ...

2007

Liver fibrosis: non-invasive assessment with MR elastography

Najat Salameh

The aim of this study was to assess the feasibility of using non-invasive MR elastography for determining the stage of liver fibrosis. Twenty-five consecutive patients who had liver biopsy for suspicion of chronic liver disease were included in the study. ...

Wiley-Blackwell2006

Characterizing electron temperature gradient turbulence via numerical simulation

Numerical simulations of electron temperature gradient (ETG) turbulence are presented that characterize the ETG fluctuation spectrum, establish limits to the validity of the adiabatic ion model often employed in studying ETG turbulence, and support the ten ...

2006

Studies of Electron Transport and Current Diffusion in Switched ECCD experiments on TCV

Olivier Sauter, Timothy Goodman, Stefano Alberti, Roland Behn, Emiliano Fable, Costanza Zucca

The aim of the present work is to provide a better insight on the magnetic shear profile modification in the Switched ECCD experiments. Modelling of the plasma current density is carried on by the ASTRA transport code employed in both predictive and interp ...

2006

Linear stability analysis of microinstabilities in electron internal transport barrier non-inductive discharges

Olivier Sauter, Yann Camenen, Alberto Bottino, Emiliano Fable

The role of the current profile and ion and electron temperature ratio in Tokamak A Configuration Variable (TCV) electron internal transport barrier (eITB) noninductive discharges is inspected by means of the linear gyrokinetic global code LORB5 (Bottino e ...

2006

On ion cyclotron current drive for sawtooth control

Olivier Sauter, Stefano Coda

Experiments using ion cyclotron current drive (ICCD) to control sawteeth are presented. In particular, discharges demonstrating shortening of fast ion induced long sawteeth reported in (Eriksson et al 2004 Phys. Rev. Lett. 92 235004) by ICCD have been anal ...

2006

Q-factor optimization of a tuning-fork/fiber sensor for shear-force detection

Majed Chergui, Andrea Callegari, Jinquan Liu

We present the results of an exptl. and theor. study on the optimum design of shear-force sensors, used in scanning probe microscopes. We have optimized a configuration consisting of a tuning-fork/fiber-tip assembly, achieving quality factors (Q) exceeding ...

2005

FMRI compatible haptic interface actuated with traveling wave ultrasonic motor

Yves Perriard, Dominique Chapuis, Roger Gassert, Markus Flückiger, Matteo Bullo

We are developing haptic interfaces compatible with functional Magnetic Resonance Imaging (fMRI) for neuroscience studies. The presented prototype with one rotary degree of freedom is actuated by a traveling wave ultrasonic motor operating under admittance ...

2005

Rapid and localized electron internal-transport-barrier formation during shear inversion in fully noninductive TCV discharges

Olivier Sauter, Stefano Coda, Timothy Goodman, Antoine Pochelon, Yann Camenen, Petri Nikkola

Clear evidence is reported for the first time of a rapid localized reduction of core electron energy diffusivity during the formation of an electron internal-transport barrier. The transition occurs rapidly (similar or equal to3 ms), during a slow (similar ...

2004

Physics of transport in tokamaks

Henri Weisen, Adriano Manini

This paper is an overview of recent results relating to turbulent particle and heat transport, and to the triggering of internal transport barriers (ITBs). The dependence of the turbulent particle pinch velocity on plasma parameters has been clarified and ...

2004

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