In this paper, we propose a novel method for the blind compensation of drift for the asynchronous recording of an ad hoc microphone array. Digital signals simultaneously observed by different recording devices have drift of the time differences between the observation channels because of the sampling frequency mismatch among the devices. On the basis of a model in which the time difference is c...

We examined effects of diabetes mellitus (DM) on the pupillary light reflex (PLR). Phasic pupillary response to a single light stimulus (200 ms) (pPLR) and to continuous sinusoidal stimuli with four different frequencies (0.1, 0.3, 0.7, 1.3Hz) (cPLR) were examined in 52 DM patients and 21 control subjects. We asked: does recording and frequency analysis of cPLR together with short time fourier ...

In this paper we present improved performance evaluation parameters like Accuracy, FAR, FRR and EER for thumbprint (Uni-modal) biometric system using SURF approach. Here, we also compared the proposed approach with existing methods e.g. STFT, SIFT etc.

Two popular spectral-based approaches for estimating the evolutionary power spectral density (EPSD) function from samples of process are based on short-time Fourier transform (STFT) and continuous wavelet transform. Both rely concept slowly varying modulation or EPSD function, although quantification effect 'slow' variation in estimated is elusive. We propose, present study, to use derivatives ...

Motivated by results of Dyatlov on Fourier uncertainty principles for Cantor sets and similar Knutsen joint time-frequency representations (i.e., the short-time transform (STFT) with a Gaussian window, equivalent to Fock spaces), we suggest general setting relating localization prove, within this context, an principle in Bergman spaces unit disk, where set is defined as union annuli that are eq...

Water is an essential good for human being necessity. It must be protected against pollution and useless leakage. Urban waterworks is a strategic infrastructure to be managed with particular attention and care so that users must be satisfied. Different techniques are used to detect leaks from waterworks, specifically from pipelines carrying water. Among them, spectral analysis is very interesti...