An aircraft hot water supply system comprising a group of water-use stations each including a hot water line having a heater which heats water at a heating rate dependent upon power provided thereto. The prediction is achieved through the use of one or more detector systems positioned to sample and detect predetermined signal metrics of the received signal prior to analog-to-digital conversion and subsequent post-processing. At least one mobile electronic device is used to indicate the state of occupancy of the structure. A backside deposition for oxide insulation layer can be performed so that the oxide insulation layer can be located in the semiconductor base right under the inductive components for impeding the parasitic current loss generated by the inductive components in the semiconductor base due to electromagnetic induction.