A map data provides a road network, which is defined by multiple unit links and multiple link connection relationships. Word lines are disposed with a longer direction extending in a second direction orthogonal to the first direction, and connected commonly to the gate electrodes of the plural memory transistors lined up in the second direction. Battery operated radiation generation sources, air cooled radiation generation sources, and charged particle accelerators, are also disclosed. The cylindrical body 2 includes one or two longitudinal slots 4 to allow expansion and contraction of the cylindrical body.