A vascular prosthesis comprising a first layer having a predetermined first porosity and a second layer having a predetermined second porosity, wherein the first layer and the second layer are each made of first and second electrospun polymer fibers. The electronic device includes modeler circuitry that determines watermark data based on a first signal. The cable clamping screw for clamping the control cable is housed in a space saving manner in an opening in the cable guide part, wherein a direct transfer of the actuating forces to the connecting arm is possible with small frictional losses. An interface head coupled to the distal end of the riser is located adjacent a passenger seat bottom cushion. In another embodiment, the computer initiates display of the customized user interface to the first computer. A tool and a computer program product are provided.