Gloucestershire Old Spots as there are fewer than 1000 registered breeding females. An application has been made to gain European Commission Traditional Speciality Guaranteed (TSG) status for Old Spots pig meat. This was granted on 29 July 2010. The TSG certification attests that a particular food product objectively possesses specific characteristics which differentiate it from all others in its category, and that its raw materials, composition or method of production have been consistent for a minimum of 30 years. The GOS is a large breed, white in colour with a minimum of one distinct black spot. It has lop ears which will almost
Dynamical billiards Dynamical billiards A billiard is a dynamical system in which a particle alternates between motion in a straight line and specular reflections from a boundary. When the particle hits the boundary it reflects from it without loss of speed. Billiard dynamical systems are Hamiltonian idealizations of the game of billiards, but where the region contained by the boundary can have shapes other than rectangular and even be multidimensional. Dynamical billiards may also be studied on non-Euclidean geometries; indeed, the very first studies of billiards established their ergodic motion on surfaces of constant negative curvature. The study of billiards which are