Rotating spiral waves are observed in a variety of physical, chemical, and biological settings including the Belousov-Zhabotinsky (BZ) reaction, thermal convection in a thin fluid layer, slime mold on a nutrient-supplied medium, and waves of electrical activity in heart tissue [1,2]. While much attention has been devoted to spiral waves in two dimensions, there has also been increasing interest...

We examined the strengths and weaknesses of three diverse scroll control modalities for photo browsing on personal digital assistants (PDAs). This exploration covered nine alternatives in a design space that consisted of three visual interfaces and three control modalities. The three interfaces were a traditional thumbnail layout, a layout that placed a single picture on the screen at a time, a...

A full linear stability of a straight scroll wave in an excitable medium is presented. The five eigenmode branches which correspond to deformation in the third dimension of the five main modes of two-dimensional (2D) spiral dynamics are found to play a dominant role. For untwisted scroll waves, modulations in the third dimension have stabilizing or destabilizing effects on the different modes d...