Abstract: A roll cover and a roll in particular for use in a machine line for the production or processing of a fibrous web is provided, wherein the roll cover includes a radial outer functional layer which provides the surface of the roll cover in contact with the web, and wherein the functional layer has structural elements, in particular in the form of grooves and/or bores, wherein the functional layer is constructed of an elastomer material with a Poisson number greater than 0.4, between 0.45 and 0.5.

Abstract: In a circuit arrangement for analyzing a clocked signal reflected from an object, particularly an optical signal, wherein at least one radiation emitter which, for providing the clocked signal, is connected to a clocking signal generator, and at least one radiation receiver which receives radiation pulses emitted by the radiation emitter and reflected from the object, and a comparator by which the output signal pulses of the radiation are compared with reference pulses whose amplitudes depend on output signals of the comparator, are provided, the reference signal pulses occur concurrently with the radiation impulses received by the radiation receiver and the impulses received by the radiation receiver are compensated for each by a respective internal reference impulse before their analysis in the circuit arrangement.

Abstract: In a circuit arrangement for analyzing a clocked signal reflected from an object, particularly an optical signal, comprising at least one radiation emitter which, for providing the clocked signal, is connected to a clocking signal generator, at least one radiation receiver which receives radiation pulses emitted by the radiation emitter and reflected from the object, and a comparator by means of which the output signal pulses of the radiation are compared with reference pulses wherein the amplitude of the reference signal pulses depends on output signals of the comparator, the reference signal pulses occur concurrently with the radiation impulses received by the radiation receiver and the impulses received by the radiation receiver are compensated for each by a respective internal reference impulse.

Abstract: In a device for operating a computer or computer-based apparatus comprising a first arrangement by which the position of an object on an axis can be determined, a second arrangement is provided by which, additionally the distance of the object from the axis can be determined.