A heating element of a fluid ejection device, the heating element including a ring-type body, an inner edge of the body, and an outer edge of the body, wherein at least one of the inner edge and the outer edge defines an undulated surface contour. Particularly, the present invention relates to a functional fragment of the leptin receptor, involved in SOCS3, CIS andor Vav signaling. This arrangement preferably yields an adaptable ON-time and adaptable OFF-time switch that is capable of rapidly charging capacitor loads ranging from as low as zero volts to several hundred volts. The crash sensor system includes a plurality of similar multifunctional peripheral crash sensors located in various areas of the vehicle body.