OF THE DISSERTATION..................................................................... xiv Chapter

We have been developing a stochastic model for figure-ground separation[9][3][12]. The model selects/constructs the foreground with preference for figures with “more convex” shapes. When these models are applied to illusory figures ([7]) they yield perceptually accurate selection of figure and background. The approach is based on an “entropy” measure of a region dijfksion Markov model from a se...

In this paper we discuss a novel technique to control the spatial distribution of sound level within a synthesized sound field. The problem is formulated by separating the sound field into regions with high acoustic level, so-called bright regions, and zones with low acoustic level (zones of quiet) by time independent virtual boundaries. This way, the propagating sound field obtains a static sp...

in this paper we examine the absorption and dispersion properties of a weak probe field via electromagnetically induced transparency (eit) in a four-level system. it is shown that under certain condition, using this model, the absorption cancellation is appeared and the medium becomes transparent to the weak probe field. it will be shown that the controlling of absorption and dispersion spectru...