Two-dimensional excitable media, for example the excitable version of the Belousov-Zhabotinsky reaction, are capable of forming spiral-shaped self-sustaining rotating wave patterns (rotors). In order to explain Winfree's experimental observation of an irregular "meandering" of the rotor's core region, we present a numerical simulation of a continuous, two-variable excitable medium in two space ...

3 The Copernicus Era 17 3.1 Cloudy Sightlines: ζ Oph . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 3.2 Intercloud Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 3.3 Deuterium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.4 Molecular Hydrogen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3.5 The Distrib...

The use of automated systems in the modern microbiology laboratory is becoming commonplace as the pressure of cost containment impacts on staff resources. With increased international travel and threats of bioterrorism, recognition and accurate identification of organisms such as Burkholderia pseudomallei is important. In areas where this organism is endemic, identification is not usually probl...