The monitoring of slow deformation processes by means of SAR Interferometry requests the observed area to mantain its correlation for more years. This usually happens only for those areas having particularly favourable characteristics, such as poor vegetation and dry and no windy climate. However, even in an area which decorrelates in a few weeks, a certain number of features has been observed,...

The idea of performing dereverberation using a short-time spatial coherence estimate dates back to 1977 [1], when it was proposed to essentially use the magnitude of the coherence as gain for reverberation suppression. Another heuristic method was recently proposed in [2], where a soft threshold function is used to compute a gain from the coherence magnitude, and the parameters of the threshold...

Attention to specific features of moving visual stimuli modulates the activity in human cortical motion sensitive areas. In this study we employed combined event-related electrophysiological, magnetencephalographic (EEG, MEG) and hemodynamic functional magnetic resonance imaging (fMRI) measures of brain activity to investigate the precise time course and the neural correlates of feature-based a...

The study of the correlations that may exist between neurophysiological signals is at the heart of modern techniques for data analysis in neuroscience. Wavelet coherence is a popular method to construct a time-frequency map that can be used to analyze the time-frequency correlations between two time series. Coherence is a normalized measure of dependence, for which it is possible to construct c...

Introduction Analyses of resting-state functional magnetic resonance imaging (fMRI) data typically use approaches that determine the similarity between the time courses of individual image voxels or target regions and reference time courses from seed regions. This can be accomplished either in the time domain (e.g., cross-correlation) or in the frequency domain (e.g., coherence). These approach...

LLE Review, Volume 75 151 A critical concern for Nd:glass fusion lasers such as OMEGA and the National Ignition Facility (NIF) is the uniformity of irradiation experienced by the fusion target. Uniform beams are generated by beam-smoothing schemes such as smoothing by spectral dispersion (SSD),1 which vary the instantaneous speckle pattern on target on time scales that are short compared with r...