We study a mechanical model known as a Galton board--a particle rolling on a tilted plane under gravitation and bouncing off a periodic array of rigid pegs. Incidentally, this model is identical to a periodic Lorentz gas where an electron is driven by a uniform electric field. Previous heuristic and experimental studies have suggested that the particle's speed v(t) should grow as t(1/3) and its...

To gain an understanding of the factors affecting interaction one grain with its environment as it reaches equilibrium, we study a particle bouncing off flat surface. The leads to dissipation that is usually characterized t, coefficient restitution, defined ratio between velocity component normal contact surface just before impact ( Vn ) and same component, but immediately after collision Vn’ )...

In recent years, the tourism literature has demonstrated a growing interest in concept of resilience and its implications for travel tourism. However, research is still early stages there are many challenges ahead. response to these challenges, current study examines how destinations practising recovery face crisis, using case analysis global overcoming crisis: France, Turkey, Russia, Korea, Be...