Orally active benzodiazepine derivatives and their salts are disclosed. The Schottky diode includes: a substrate, a first-type buried layer in the substrate, a cathode region, an anode region surrounding the cathode region, and a first-type guard ring surrounding the anode region and connected to the first-type buried layer. The top portion has a plurality of openings and at least one flexible retaining element configured to releasably engage a retaining feature on the hearing device. Then, a square-wave pulse with the detection voltage is sent intermittently to the sensor, so that the sensor outputs a second signal to the processing device. The disclosed composition does not contain any significant amount of volatile organic solvents that do not become incorporated in the active layer after curing. The bumper system also includes a push bar disposed below and operatively connected to the bumper beam to deflect and rotate during an impact with an object by the bumper system.