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BACKGROUND The skin microcirculation may be evaluated noninvasively by laser Doppler flowmetry and iontophoresis with acetylcholine and sodium nitroprusside. Wavelet transform of the perfusion signal shows periodic oscillations of five characteristic frequencies in the interval 0.0095-1.6 Hz. The aim of the current study was to investigate alterations in(More)
Improvements of athletic capacity in high-performance sport are mainly achieved through an increase of the quality of training. In physical preparation, the quality of training can be improved by developing highly specific means of training. The aim of this paper is to present three examples of how highly specific means of fitness training of world class(More)
Spectral reconstruction of short signals is a problem relevant to many areas of engineering and science. Classical techniques, e.g. Fourier transform (FT) and the wavelet transform (WT) fail to provide accurate estimates of the low frequency content of the signal due to the inherent limitations formulated by the Heisenberg uncertainty principle. To cope(More)
In this paper we present a system for fault detection and isolation of electrical motors for vacuum cleaners, which serves for on-line quality assessment at the end of the production line. The main focus of the paper is on detection of incipient mechanical faults by means of sound analysis. A detailed description of the procedures for detection and(More)
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