Abstract: A rapid prototype modeling system operates to first electronically decompose a discrete part represented by an STL file into thick layers, which are then electronically sliced into cross sectional slices the thickness of a sheet of construction material. The slices are cut from sheets of the construction material in a pattern which permits construction of the layers by stacking the sheets. The layers are then stacked appropriately to create a physical model of the discrete part.

Abstract: A method of reproducing using a rotary head type tape recorder. The method is based on the detection or reproduction of a synchronizing signal of each ATF area which has been recorded and formed at the starting and terminal ends of each track of a magnetic tape. Crosstalk components of pilot signals from two tracks adjacent to a trace track are sampled, thereby to control a reproducing tracking according to an area division type ATF method. When reproducing the magnetic tape which has been recorded in a long-time mode, in which the tape travelling speed and the drum revolution speed are respectively set to 1/2 of the standard travelling speed and to 1/2 of the standard revolution speed, the tape travelling speed is set to 1/2 of the standard travelling speed (i.e., a travelling speed determined for the long-time mode), and the drum revolution speed is set to the standard revolution speed (i.e., a speed double of the revolution speed determined for the long-time mode).