A microcomputer included in a physical condition monitoring system calculates the amount of autonomic nerve activity during sleep based on physical information during sleep collected by a physical information collecting device 1. The system includes a main server and at least one participant server. The invention also discloses a 3D synchronizing signal composingembedding device for embedding synchronizing signals to a 2D videomotion picture including a data capturing means, a converting means, a synchronizing means and a composing means or an embedding means. The two attachment plates are arcs facing each other to form a non-closed space. The bulging may be used, via mechanical coupling, to provide mechanical actuation on a nanometer scale.