The present invention provides isolated polypeptides isolatable from a Staphylococcus spp. Closed loop control according to the invention allows individual drives to be de-energized when the power requirements do not demand their usage. The first propagation part has a first incidence end face on which part of incident light is incident, and a first emission part that emits first propagation light. The sensor also determines the travelling speed from the rate at which consecutive maximum and minimum extreme values occur in the second signal. Each of these two buffers serves as on-screen buffer for storing the processed video signal being displayed or to be displayed and serves as on-process buffer for storing the processed video signal being mixed or to be mixed, cyclically.