A portable electronic device is disclosed. A method for preparation of a titanate nanostructure is also provided. The system also includes redundant second process controllers configured to communicate over redundant industrial control networks in the industrial process control and automation system. The power supply powers the first electronic device at the first DC voltage and the second electronic device at the second DC voltage. At said end distance, the N-active sensor is oriented towards the north pole and the S-active sensor is oriented towards the south pole of the permanent magnet. For each of the output columns, the read pointer selects an input column from a limited portion of the buffer that contains a set of the input columns that are capable of being switched in time to the corresponding output column according to a communication protocol.