Disclosed is a system for correlating intrusion events using attack graph distances. Activity data representative of worker activities are collected at the work site and can be accessed by a supervisor located remote from the work site. A plurality of reticle layouts is generated from the feature layout where each reticle layout of the plurality of reticle layouts has a reticle layout pitch and where each reticle layout pitch is at least twice the feature layout pitch. If the application is, on the basis of the access control information, entitled to access the configuration data set, access to the configuration data set is arranged for the application. The gas turbine apparatus has an electric power controller 21 to control electric power to be generated by the electric generator 5 based on output values of the first PID processing unit 16 and the second PID processing unit 17. A braided copper shield may be formed over the metallized polyester tape.