Concept

Précession

Publications associées (52)

Torque anomalies at magnetization plateaux in quantum magnets with Dzyaloshinskii-Moriya interactions

We investigate the effect of Dzyaloshinskii-Moriya (DM) interactions on torque measurements of quantum magnets with magnetization plateaux in the context of a frustrated spin-1/2 ladder. Using extensive DMRG simulations, we show that the DM contribution to ...

2009

Strength of the baseplate fixation of a reversed shoulder prosthesis

Stephanie Kochbeck

A reversed shoulder prosthesis is the general treatment of glenohumeral arthritis and concomitant rotator cuff arthropathy. However, failure due to loosening of the components remains a concern. The purpose of this study was to examine the forces that occu ...

2008

A hybrid ultrasonic motor and electrorheological fluid clutch actuator for force-feedback in MRI/fMRI

Hannes Bleuler, Dominique Chapuis, Roger Gassert, Etienne Burdet

This paper presents a safe, electrically powered MR-compatible actuator with a large range of output impedance, which can be used at the entry of the scanner bore. This actuator is composed of an ultrasonic motor (USM) and a torque-controlled electrorheolo ...

2008

A Hybrid Ultrasonic Motor and Electrorheological Fluid Clutch Actuator for Force-Feedback in MRI/fMRI

Hannes Bleuler, Dominique Chapuis, Roger Gassert, Etienne Burdet

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2008

Force and torque vectors at the foot generated by surface electrical stimulation of leg muscles

Reymond Clavel, Patrick Métrailler, Carl Schmitt

MotionMakerTM is a robotic system that employs functional electrical stimulation (FES) of leg muscles to allow subjects with complete or partial paralysis of the legs to perform exercises. To achieve the greatest benefit from exercise muscles should do wor ...

2006

Analyzing the phonon-polariton response of silicon Carbide microparticles and nanoparticles by use of the Bondary Element Method

Hans Peter Herzig

We present our investigation of the torque exerted on dielectric elliptical cylinders by highly focused laser beams. The calculations are performed with rigorous diffraction theory, and the size-dependent torque is analyzed as a function of the axis ratio. ...

2005

Numerical Flow Analysis in a Pelton Turbine Bucket

François Avellan, Mohamed Farhat, Alexandre Perrig

The flow in the Pelton turbine bucket is three-dimensional, unsteady, turbulent, features a free surface, and is influenced by the rotation-induced forces. It is therefore difficult to investigate how the energy transfer takes place between the water flow ...

International Association For Hydraulic Research2004

Transverse relaxation in proton NMR. Separate measurement of decay rates of in-phase and antiphase coherence

Geoffrey Bodenhausen

The first 1H NMR measurements are reported that allow on to compare T2 decay rates under free precession with T1p decay rare of spin-locked in-phase and antiphase coherence. Measurements were make for the cyclic undecapeptide cyclosporin A and for the self ...

1995

Startup Methods for Single-Mode Gyrotron Operation

Stefano Alberti, Minh Quang Tran, Trach-Minh Tran

Experimental start-up results of a 118 GHz TE(22,6) gyrotron are presented and compared with theory. The theoretical excitation regimes of competing modes are computed in the energy-velocity-pitch-angle plane. The start-up paths through the plane are deter ...

1995

Measurement of proton relaxation rates in proteins

Geoffrey Bodenhausen

Five different types of expt. are described which make it possible to measure various relaxation rates of selected protons in crowded spectra of macromols. such as proteins: longitudinal spin-lattice relaxation rates rt = 1/T1, transverse relaxation rates ...

1993

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