A toilet training device has a target sensor for sensing an impact of urine, a first suction cup for securing the target sensor to a toilet, a music box for providing a feedback, and an insulated electric wire for connecting the target sensor with the music box. Specifically, the invention relates to a computer-implemented peer-to-peer anonymous evaluation to determine a winner of a competition. The bottom electrode stack is prepared by depositing a ferroelectric film atop an Ir or Ru metal electrode layer, then annealing the ferroelectric layer in an oxygen ambient wherein the partial pressure of oxygen is controlled at a level sufficient to oxidize the ferroelectric layer but not at a level sufficient to oxidize the metal electrode layer. The clock frequency information thus selected is input to the clock phase detector. As a result, the output signal line substantially does not float at or above Vcc-Vtn.