Systems, methods and apparatuses for the generation of a global history are disclosed. The radiant heater has a heating coil with a corresponding control and an induction coil as an inductive sensor and which is located in a metal tray. At least one of the mirrors includes a graded reflective coating with a rotationally-asymmetric coating thickness profile in the mirror plane on a substrate with a rotationally-asymmetric or rotationally-symmetric surface profile. By using a cushioning strucgture for gradually absorbing kinetic energy toward the terminal end of the motion of the power actuator, an inadvertent unlatching of the buckle owing to an impulsive movement of the buckle can be avoided, and an excessive reaction force is prevented from being transmitted to the pretensioner device. The screw includes a head provided with a specially designed drive socket with radially extending slots at its outer end for receiving corresponding protrusions on the shaft of screwdriver.