Each node of a topological database that represents an information technology environment with multi-tenancy capability represents a configuration item within the environment and is characterized by a tenant authorization rule that indicates a list of tenants that are authorized to access the corresponding configuration. A QoS information setting part sets QoS information of IP in a packet and sets QoS information of ATM corresponding to the QoS information when an IP-based communication takes place between networks, and sets QoS information of ATM in a cell when an ATM-based communication takes place. The test signal generator is configured to generate a test signal and apply the test signal to the forward path of the control loop during operation of the MEMS accelerometer transducer. A corresponding deconvolution function from a deconvolution function look-up table corresponding to the detector whose intensity value is being corrected is deconvolved with a line of the intensity values which spans a plurality of adjoining source fan data lines to remove the intensity attributable to off-focal radiation.