Crest factor optimization of the multisine waveform for bioimpedance spectroscopy.

The multisine excitation is widely used in impedance measurements to retain the advantages of the sine wave, while reducing the measurement time. Adding up sine waves increases the amplitude of the excitation signal, but, for the linearity assumption to be valid, the overall amplitude of the signal needs to be kept low. Thus, the crest factor (CF) of the excitation signal must be minimized.

Home rehabilitation system supported by the safety model.

The paper describes a tele-rehabilitation system for simultaneous motor rehabilitation (post-stroke and post-arthroscopy) and continuous patient's condition assessment with the focus on patient safety observations. Micro-electro-mechanical accelerometer and gyroscope sensors attached to the patient gather information about the performed therapeutic exercises. The measurement data processing of the vital sign sensors and accelerometers is done in the health hub device in real time with the patient feedback.

Entropy of the EEG in transition to burst suppression in deep anesthesia: Surrogate analysis.

In this paper 5 methods for the assessment of signal entropy are compared in their capability to follow the changes in the EEG signal during transition from continuous EEG to burst suppression in deep anesthesia. To study the sensitivity of the measures to phase information in the signal, phase randomization as well as amplitude adjusted surrogates are also analyzed. We show that the selection of algorithm parameters and the use of normalization are important issues in interpretation and comparison of the results.