A method and apparatus for simulating human intelligence and natural language dialog capability is disclosed. The magnetic circuits facilitate positioning and holding of a moving coil, and the voice coil motor is improved in positioning precision of a magnetic head. The plurality of network options includes forming a heterogeneous network composed of both a peer-to-peer network and a multiplexed network. The ESD protection circuit is connected electrically to an interface connector serving as a data exchange path. The transient decay may result from a relatively short incubation period, relatively small sample reservoir volumes, relatively small distances between electrode surfaces and the lid of the sensor strip, andor relatively short excitations in relation to the average initial thickness of the reagent layer.