An antimicrobial biocidic fiber-plastic composite is capable of killing bacteria on contact. The invention provides a semiconductor device including a terminal to which a touch electrode may be coupled; a source voltage drop circuit generating a constant voltage; a phase shift circuit generating a phase shifted clock in response to a first clock and a phase control signal; and a switching circuit to which the constant voltage is supplied. Locking elements are moulded at both ends of the housing piece and the securing clip, which clip into each other on placing the securing clip on the housing piece. A transition area is positioned between the first tube and the second tube. The printing forms are conveyed, by the conveyor device, to a form cylinder of the printing press and are arranged on the form cylinder. In an embodiment, the method comprises obtaining a probability that the message is spam; in dependence upon the probability that the message is spam, determining a variable message size; and sending the message to the communication device in dependence upon the determined variable message size.