Physical machine volumes can be converted to virtual machines at a virtual machine host while the physical machines are running. The first conductive coil patterns and the second conductive coil patterns overlap each other at edges thereof. This allows a signature to be authenticated by scanning the signature, extracting the information, and comparing it to known times, locations, and pen uses of a claimed signatory. The apparatus includes a sensor to measure a value at the purge port and a processor to compare the value to a predetermined value or a previously measured value to identify if the value is outside of a predetermined threshold. The reduction in flue gas volume allows the implementation of much smaller pollutant control equipment, since the size of the pollutant control units is mainly based on the volume or mass flow rate of flue gas to be treated.