The invention presents a networked system for identifying an individual, communicating information to the individual, and remotely monitoring the individual. The basic capacitive plate and the compensation capacitive plate are independent from each other, each of the basic and compensation capacitive plates has a metallic circuit connected to outside, and the metallic circuits are connected to a switch. The noble metallic tip is fixed to the electrode by resistance welding under a condition that the electrode presses the noble metallic tip to the jig. The first curved portion of the elongate shaft defines a first plane. Based on the similarity value it can be determined whether to delete or bypass the data page in the aggregate document.