OCTOBER 2003 AMERICAN METEOROLOGICAL SOCIETY | T he interplay of sunlight, moonlight, or anthropogenic light sources with cloud and precipitation particles can produce a wide variety of optical phenomena, some with dazzling arcs and colors, in the sky around us. These naturally occurring patterns of redistributed light, often referred to generally as atmospheric optics, represent an especially ...

This paper deals with a new class of image models called mosaic models that view an image as a random pattern and model it by an appropriate planar process. There are several different kinds of image models in use. Mandelbrot, [l] models irregular and fragmentary natural patterns by Brownian surfaces (Fig. 1). Wong [2], H assner [3], and others model images by two-dimensional random fields. Mat...

We have developed an efferent brain machine interface (BMI) that allows monkey subjects to grasp objects despite a peripheral nerve block causing complete paralysis of the flexor muscles below the elbow. We anticipate that such a system might ultimately provide spinal cord injured patients with control of arm and hand movements through normal cognitive processes, and greatly enhance their indep...

Imaging systems with feedback are, generally, non-linear dynamic systems, which exhibit evolutionary pattern formation. In the paper, results of experimental investigation of pattern formation in several discrete models of such systems inspired by the famous mathematical “Game of Life” are presented and a number of new amazing phenomena in the evolutionary pattern formation in the models are re...

Crystal growth has been recognized as a paradigm for non-equilibrium pattern formation for decades. Scientific interest in this field has focused on the growth rates and curvature of branches in snowflake-like structures patterned after a solid’s crystallographic orientations. In reality, there exists a much richer variety of crystal patterns in nature. Investigations of dendritically solidifyi...

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