This patent document relates generally to steganography and digital watermarking. In an embodiment, the one-way clutch can disengage and rotors or impellers associated with the system are permitted to rotate independently of the one-way clutch. The capacitor comprises a capacitor stack formed between a first and second metal layers of the integrated circuit. Each replica also maintains an array of change buckets each corresponding to the most recent changes replicated from the other replicas in the group. If the NG count reaches a second specified number, the chip under test is determined to be defective and the test is ended. The down stroke pushes fluid from the housing chamber past the closed lower standing valve and through the open upper standing valve to the pump’s exit into the tubing.