In one embodiment, a system includes a touch sensor and a computer-readable storage media coupled to the touch sensor and embodying logic that is configured when executed to receive a first plurality of sense signals from sense electrodes of the touch sensor and determine, based on characteristics of the first plurality of sense signals, a plurality of codes. The process comprises the step of forming the film by plasma CVD. The command signals from the reader include selection or de-selection criteria for selecting or de-selecting transponders by moving them between different states by setting or resetting a command flag, such as a flip-flop, in the transponders. Data regarding whether or not the information provided to the client is relevant may be obtained from the client through implicit feedback, explicit feedback, metadata information, or any combination thereof. In particular, methods of using embodiments of the invention in a well, such as water and petroleum wells, are described.