Abstract: Display module having a flexible display unit and a housing having a rear side and a front side, the flexible display unit being arranged on the front side of the housing, characterized in that the housing has a plurality of interior spaces for accommodating electronic components, in that the housing is flexible at least along boundaries of the interior spaces in that the housing has recesses on the rear side which extend at least partially over the rear side, as a result of which the housing with the display unit can be bent within a predefined angular range along the recesses. Furthermore, a use of the display module, a display system comprising a plurality of display modules, and a method of operating a display system are disclosed.

Abstract: A quality value for a carbon ceramic brake disc (2) in a vehicle is measured by means of a measuring device (3) installed in the vehicle. The measuring device (3) with a coil (10) is located at a distance (d) from the brake disc (2) in order avoid direct physical contact with the brake disc. The impedance of the coil (10) is measured for at least two frequencies. The resulting measurement values that correlate to impedance values are introduced into a mathematical model in order to eliminate the dependence of the unknown distance (d) and to obtain a quality value dependent on the conductivity of the brake disc (2).

Abstract: In order to characterize electrically conducting and/or ferromagnetic objects, such as rebars, in concrete, a device is rolled along a surface of the sample. The device comprises e.g. two rows (10.1, 10.2) of partially overlapping sending coils (6) and receiving coils (7). Each pair of attributed sending and receiving coils (6, 7) is designed to have reduced mutual impedance in the absence of any electrically conducting and/or ferromagnetic object. The complex value, e.g. the phase and absolute value, of the mutual impedances are measured in order to determine a number of parameters (size, position and coverage of the object with concrete) of the objects.

Abstract: A quality value for a carbon ceramic brake disc (2) in a vehicle is measured by means of a measuring device (3) installed in the vehicle. The measuring device (3) with a coil (10) is located at a distance (d) from the brake disc (2) in order avoid direct physical contact with the brake disc. The impedance of the coil (10) is measured for at least two frequencies. The resulting measurement values that correlate to impedance values are introduced into a mathematical model in order to eliminate the dependence of the unknown distance (d) and to obtain a quality value dependent on the conductivity of the brake disc (2).