Publication

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

Publications associées (36)

DNA Trans location through Low-Noise Glass Nanopores

Aleksandra Radenovic, Lorenz Jan Steinbock, Roman Bulushev, Camille Alice Raillon, Swati Krishnan

The effect of electron irradiation-induced shrinking on glass nanocapillaries with diameters ranging from 75 to 14 nm was analyzed by measuring the conductance characteristics with and without DNA translocation. We have investigated nanocapillary shrinking ...

American Chemical Society2013

Unedited in vivo detection and quantification of gamma-aminobutyric acid in the occipital cortex using short-TE MRS at 3 T

Rolf Gruetter

Short-TE MRS has been proposed recently as a method for the in vivo detection and quantification of gamma-aminobutyric acid (GABA) in the human brain at 3 T. In this study, we investigated the accuracy and reproducibility of short-TE MRS measurements of GA ...

Wiley-Blackwell2013

A comparison of in vivo (13) C MR brain glycogen quantification at 9.4 and 14.1 T

Rolf Gruetter, Yves Pilloud, Ruud van Heeswijk

The high molecular weight and low concentration of brain glycogen render its noninvasive quantification challenging. Therefore, the precision increase of the quantification by localized (13) C MR at 9.4 to 14.1 T was investigated. Signal-to-noise ratio inc ...

2012

Piezoelectric Actuators Characterization

Pierre-André Farine, Alexis Boegli, Christian Robert, Patrick Stadelmann

This paper describes a system to drive piezoelectric actuators over more than one decade of voltages and one octave of frequencies, in order to perform high-speed complex impedance characterization at a user chosen voltage excitation level. This characteri ...

Ieee Computer Soc2012

Impact of Loss Variations on Double-Ended Distributed Temperature Sensors Based on Raman Anti-Stokes Signal Only

Marcelo Alfonso Soto Hernandez

We present a theoretical and experimental analysis of the sensing capabilities of Raman-based distributed temperature optical fiber sensor (RDTS) systems using only the anti-Stokes (AS) component in loop configuration. In particular, the effects of time- a ...

2012

Direct Piezoresistive Simulation Tool

Nico de Rooij, Terunobu Akiyama, Sebastian Gautsch, Peter Vettiger, Frédéric Loizeau

Biosensors often require detecting infinitesimal amount of species, thus their readout must be improved for highest sensitivity and best Signal-to-Noise ratio. We will present a simulation tool for piezoresistive strain sensors, which takes into account no ...

2011

Reliable MEMS Actuators for Driving Large Microsystems

Nicolas Bernard Golay

Nowadays many consumer electronic devices are using small engines (micromotors). Thanks to technological innovation, the components can be imbedded into numerous portable systems. The key factors for a nomadic integration are: reduction of power consumptio ...

EPFL2010

SNR enhancement of Raman-based long-range distributed temperature sensors using cyclic Simplex codes

Presented is a novel approach for enhancing the signal-to-noise ratio (SNR) of optical fibre distributed temperature sensors. The proposed method is based on cyclic codes and it can be implemented by high-power lasers, which are required for long-range app ...

Institution of Engineering and Technology2010

Application of ultrasonic motors to MR-compatible haptic interfaces

Dominique Chapuis

Functional Magnetic Resonance Imagery (fMRI) is an imaging technique allowing the observation of brain activity. Haptic interfaces can be used in conjunction with fMRI to stimulate the subject while measuring brain activity. Using robotic stimulation over ...

EPFL2009

Indirect position control of a piezoelectric motor

Piezoelectric motors are particular motors converting electrical energy into mechanical movement, based on the inverse piezoelectric effect. Piezoelectric material, when electrical field applied, produces acoustic or ultrasonic vibrations. These vibrations ...

2009

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