Text is processed to construct a model of the text. The method of matching sources to loads further includes scoring similarity between the load activity and the source activity based on the load activity data and the source activity data, and matching loads to sources based on the scoring. If the wireless communication is to be performed by the first communication system, diversity reception or transmission is performed by first and second antenna elements. The etching further removes a portion of the first layer of bio-compatible material so as to create at least one opening in the first side that is connected to the at least opening in the second side.