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Trans-acting siRNA form through a refined RNAi mechanism in plants. miRNA-guided cleavage triggers entry of precursor transcripts into an RNA-DEPENDENT RNA POLYMERASE6 pathway, and sets the register for phased tasiRNA formation by DICER-LIKE4. Here, we show that miR390-ARGONAUTE7 complexes function in distinct cleavage or noncleavage modes at two target(More)
We have developed a novel approach to speech feature extraction based on a modulation model of a band-pass signal. Speech is processed by a bank of band-pass filters. At the output of the band-pass filters the signal is subjected to a log-derivative operation which naturally decomposes the band-pass signal into analytic (called «´Øµ · «) and anti-analytic(More)
A number of approaches to parametric estimation of signal phase are addressed. The goal is to estimate the phase, or more precisely, the parameters of the phase of a signal corrupted by white Gaussian noise. Signal models are restricted to those with linear and quadratic phase, but many of the results presented are applicable to signals with higher order(More)
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