Frederic Risacher

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The magnitude, mismatch and temporal variations of the electrode-gel-skin interface impedance can cause problems in electrical impedance tomography (EIT) measurement. It is shown that at the high frequencies generally encountered in EIT the capacitive properties of the electrode interface, and especially those of the skin, are of primary importance. A wide(More)
BONGARD, 0. and FAGRELL, B. (1990) Variations in laser Doppler flux and flow motion patterns in the dorsal skin of the human foot. Microvas. Res., 39, 212-222. BURTON, A. C. (1939) The range and variability of the blood flow in the human fingers and the vasomotor regulation of body temperature. Am. J. Physiol., 127, 437-453. DRIESSEN, G., ROTTEN, W.,(More)
Electrical Impedance Tomography (EIT) is an imaging technique based on multiple impedance measurements using electronically multiplexed surface electrodes. The present study describes an EIT prototype tomograph which uses two frequencies of applied signal: 31.25 kHz (within the frequency range originally used in early EIT studies) and 250 kHz. The use of(More)
This paper presents automatic generation of fast and accurate timed models of streaming embedded applications, before the complete software-hardware platform is available. First, a measurement model is generated and executed, on the target processor, to predict the computation delays in the application. Next, the stochastic delays are annotated to the(More)
This paper describes a methodology for developing abstract and executable system-level model in SystemC of real-time embedded software, targeted to an RTOS. Our objective is to reuse as much of the software as possible to minimize model development time. Therefore, we design a RTOS emulation layer on top of the SystemC kernel. The application software is(More)
A b s t r a c t Pulse Wave Velocity in limbs was calculated from data obtained by multichannel impedance plethysmography using purpose-built electrode arrays. Several signal processing techniques were applied to data recordled in normal subjects. The first harmonic and the derivation techniques exhibit a greater dispersion than the other used methods. The(More)
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