Abstract: The invention relates to a method for producing an insert leaf for a book-like document, in particular to a method for producing a data page for an identification document. In order to achieve a straightforward method for producing an insert leaf (11), it is proposed for at least one hinge film (17, 18) to be provided, right from the start, as a constituent part of an insert-leaf blank (19) and for that part (22) of the insert-leaf body which is not required to be separated off, in order to produce the hinge region (12).

Abstract: A method for the diagnosis of natural vibrations in a mechatronic system, includes at least one rigid body (WT1, WT2), which is moved relative to another rigid body (S) by means of at least one numerically-controlled drive, whereby the natural vibrations are caused by the drive (A1, A2) and are detected by sensors (WM1, WM2, N1, N2, BA1, BA2,) internal or external to the system. The drives (A1, A2) can be used as a system-internal, vibration-generator, so-called rotatory shakers, by superimposing white noise on a constant speed for the drive, or by wobbling the frequencies.