A system for controlling, a response to an operator, a consist of at least first and second locomotives having discrete operating modes. Windows are formed in the sheet-like element at the security element. The platinum-rhodium layer serves as an oxidation barrier and may also act as an adhesion layer for preventing separation of the lower electrode from the substrate, thereby improving capacitor performance. A biasing member connected to the seatback frame and the headrest creating a biasing force during headrest rotation away from the retracted position operates without actuation mechanism operating force to bias the headrest frame assembly toward the retracted position.