Crossing sequence

Crossing sequence

Crossing sequence may refer to:

  • Crossing sequence (signal), a sound pattern when a train crosses a level crossing
  • Crossing sequence (operation), a sequence of safety actions carried out when a train approeches and passes a level crossing
  • Crossing sequence (Turing machines)

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  • Crossing sequence (Turing machines) — In theoretical computer science, a crossing sequence at boundary k is the sequence of the states of a Turing machine in which it is at the moments when its head crosses the boundary between cells k and k+1 on the tape, i.e., when the head is over …   Wikipedia

  • Crossing sequence (railways) — In rail transport, the crossing sequence is a pattern sounded by a locomotive horn or whistle as the train approaches and passes a grade crossing.[1][2] See also Grade crossing signals References ^ Network Rail …   Wikipedia

  • Crossing of the Rhine — 31 December 406, is the often repeated date of the crossing of the Rhine by a mixed group of barbarians that included Vandals, Alans and Suebi. The Rhine crossing transgressed one of the Late Empire s most secure limines or boundaries, a… …   Wikipedia

  • Crossing number (graph theory) — A drawing of the Heawood graph with three crossings. This is the minimum number of crossings among all drawings of this graph, so the graph has crossing number cr(G) = 3. In graph theory, the crossing number cr(G) of a graph G is the… …   Wikipedia

  • Crossing-over — Enjambement (génétique) Pour les articles homonymes, voir Crossover et Enjambement. Illustration du principe d enjambement par Thomas Hunt Morgan s (1916) …   Wikipédia en Français

  • Level crossing — This article is about at grade intersections between railway and road. For where two rail lines cross, see level junction. For a type of nuclear receptor (RXR), see Retinoid X receptor. A level crossing at Chertsey, England, as the barriers rise …   Wikipedia

  • Pedestrian crossing — Crosswalk redirects here. For other uses, see Crosswalk (disambiguation). An adult and child prepare to use a crosswalk in Haifa, Israel …   Wikipedia

  • Panda crossing — The panda crossing was a type of signal controlled pedestrian crossing used in the United Kingdom from 1962 to 1967.BackgroundIn the early 1960s, the British Ministry of Transport, headed by Ernest Marples, was looking for a way to make… …   Wikipedia

  • Mid-May 2008 tornado outbreak sequence — Velocity scan of the Picher, Oklahoma tornado located near Racine, Missouri Date of tornado outbreak: May 7–15, 2008 Duration1 …   Wikipedia

  • Miller's Crossing — Theatrical release poster Directed by Joel Coen Produced by …   Wikipedia

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