A channel member, a modular floor structure, and a method capable of positioning an object on a substantially planar surface is disclosed. In one illustrative example, a method of lexicographically sorting data includes the acts of receiving a set of N cyclic shifts of N characters identifiable by an array of indexes {0, 1, 2,. The chisel would have a striking end cut square to the shaft. In case it is not connected normally, a signal is set to a vehicle starting system 4 to prohibit the starting operation of the vehicle.