A device for hair addition comprises a band-shaped support comprising a first and a second side, an adhesive surface on its first side, and at least a first and a second partial length which each comprise a portion of the adhesive surface. Furthermore, the invention relates to an aircraft door comprising at least one such hinge mechanism designed in this way, to a fuselage with at least one aircraft door that is linked to at least one hinge mechanism, designed in this way, on the fuselage, as well as to the use of at least one hinge mechanism for installation of an aircraft door on a fuselage. A solar panel recharges the battery. The laser source cards are intelligent in the sense that they can be programmably controlled by switching to select waveforms from a selected one of the rails. The method provides for the detection of specific bacteria which does not require insertion of the lux gene into the phage genome yet is faster and more sensitive than known nonmodified phage utilizing techniques.