Tune shift with amplitude of the system. When the tune reaches resonant values, it can be unstable, and thus a tune-shift with amplitude can limit the stability region, or dynamic aperture. In classical mechanics, a simple example of a system with tune shift with amplitude is a pendulum. In accelerator physics, both the transverse and the longitudinal dynamics show tune shift with amplitude. A simple model of the transverse dynamics is of an oscillator with a single sextupole, it is referred to as the Hénon map. Another model for this case is the Standard Map. An important example is the typical case of distributed
The Trouble with Physics in 2006 took place between UCSB physicists at KITP and science journalist George Johnson regarding the controversy caused by Smolin's and Peter Woit's books. The meeting was titled "The String Wars" to reflect the impression the media has given people regarding the controversy in string theory caused by Smolin's and Woit's books. A video of the proceedings is available at UCSB's website. The Trouble with Physics The Trouble with Physics: The Rise of String Theory, the Fall of a Science, and What Comes Next is a 2006 book by the theoretical physicist Lee Smolin about the problems with string theory.