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Perceptual multistability, alternative perceptions of an unchanging stimulus, gives important clues to neural dynamics. The present study examined 56 perceptual dominance time series for a Necker cube stimulus, for ambiguous motion, and for binocular rivalry. We made histograms of the perceptual dominance times, based on from 307 to 2478 responses per time(More)
The Lempel-Ziv (LZ) complexity and its variants are popular metrics for characterizing biological signals. Proper interpretation of such analyses, however, has not been thoroughly addressed. In this letter, we study the the effect of finite data size. We derive analytic expressions for the LZ complexity for regular and random sequences, and employ them to(More)
Perceptual multistability during ambiguous visual perception is an important clue to neural dynamics. We examined perceptual switching during ambiguous depth perception using a Necker cube stimulus, and also during binocular rivalry. Analysis of perceptual switching time series using variance-sample size analysis, spectral analysis and time series shuffling(More)
THERE IS RENEWED INTEREST in using hardware redundancy to mask faulty behavior in nanoelectronic components. In this article, we go back to the early ideas of von Neumann and review the key concepts behind N-tuple modular redundancy (NMR), hardware multiplex-ing, and interwoven redundant logic. We discuss several important concepts for redundant(More)
—Time series measured in real world is often nonlinear, even chaotic. To effectively extract desired information from measured time series, it is important to preprocess data to reduce noise. In this Letter, we propose an adaptive denoising algorithm. Using chaotic Lorenz data and calculating root-mean-square-error, Lyapunov exponent, and correlation(More)
Source traf®c streams as well as aggregated traf®c ¯ows often exhibit long-range-dependent (LRD) properties. In this paper, we study traf®c streams through their counting process representation. We ®rst study the condition for the measured LRD traf®c, as described by the interarrival time and packet size sequences, to be suf®ciently well approximated by a(More)
SUMMARY We present a multiplicative multifractal process to model tra$c which exhibits long-range dependence. Using tra$c trace data captured by Bellcore from operations across local and wide area networks, we examine the interarrival time series and the packet length sequences. We also model the frame size sequences of VBR video tra$c process. We prove a(More)
Several segmentation techniques were evaluated for their effectiveness in distinguishing lesion from background in dermatoscopic images of pigmented lesions (moles and melanomas). These included 5 techniques previously used for segmentation of pigmented lesions, and several new techniques based on stabilized inverse diffusion equations (SIDE) and Markov(More)