A tandem rotary electric machine, to be applicable to various types of mobile bodies such as vehicles, is equipped with a primary rotary electric machine and a secondary rotary electric machine arranged in tandem mechanism. It is characterized in that the organic short fiber is suitably a ternary composite formed of a rubber component, a polyolefin component and a nylon component and the metallic salt of \u03b1,\u03b2-ethylene unsaturated carboxylic acid is suitably zinc acrylate, zinc methacrylate, magnesium acrylate or magnesium methacrylate. A remote host visited by the mobile agent arbitrarily presents signature target data. A real-time property can be ensured while a packet loss is overcome in a radio environment.