Abstract: A method for determining the yaw velocity of a vehicle is used, in particular, for adaptive driving-speed control. The yaw velocity is calculated from measurements of wheel speed determined by wheel-speed sensors on a right and on a left non-driven wheel by introducing a correction term with a correction factor with which differing tire wear as well as different tire pressure and other interfering parameters can be eliminated.

Abstract: A xenon short arc discharge lamp has a lamp bulb (1) of quartz glass, into which two rod-shaped electrodes (4, 5) protrude, the spacing of which is shorter than the diameter of the shaft (8) of the cathode (5); the cathode (5) is provided with a conical, obtuse tip (9). By doping with a metal halide, such as thallium iodide, the spectral radiant intensity per unit area in the plasma zone immediately in front of the cathode (5) is increased substantially compared with an undoped xenon short arc discharge lamp, and as a result of a flow-controlled tungsten-halogen cycle process, a stabilized cathode spot operation is attained, and the inner wall of the lamp bulb (1) remains free of tungsten deposits.