Transaction processing is facilitated using an approach involving the provision of extracted data to transaction parties. Certain embodiments relate to band-securing devices. Each of the plurality of fins includes an auxiliary fin at a location, which is axially opposed to a corresponding one of the at least one cooling hole, to facilitate creation of the cooling air flow upon the rotation of the fan boss. The counter starts to count the clock signals generated by the clock in response to the original signal, and stops counting the clock signals and generates the index signal when the number of the clock signals counted by the counter reaches the initial value. Next, a first electrode is deposited on said upper surface.