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
There Is Always Something There to Remind Me There Is Always Something There to Remind Me "There Is Always Something There To Remind Me" is the final single released by British Indie rock band The Housemartins. An unfavourable account of Paul Heaton's schooldays akin to The Smiths' "The Headmaster Ritual", the non-album single was released in April 1988 as a 7" and a 12" and reached #35 in the singles chart. A video was made for the single featuring the band members dressed as school teachers. It was filmed at the Bishop Douglass School in Finchley, Greater London. The single cover artwork was designed by Paul Warhurst, the