The present invention relates to a lubricious anti-traction material for effectively denying the mobility and access of personnel and vehicles to selected areas. The time management section sets the limit time that is allowed for decoding each bitstream within the prescribed time based on the decoder capacity, the information on the number of bitstreams to be decoded, the image size information and the frame rate extracted from the bitstream. The throughput performance of the static instructions and the dynamic instructions is evaluated based on current states of the execution units. , and address descriptions to centralize the operation and process. at a designated frequency are calculated, and substituted into simultaneous equations describing a boundary condition for each element; by solving the simultaneous equations, the electric current, equivalent electric current, and equivalent magnetic current of each element are calculated, from which the electromagnetic field intensity is calculated. A cylindrical concave part is formed at one end surface of the disk section.