An apparatus and method for measuring the physical quantities of a data center during operation and method for servicing large-scale computing systems is disclosed. Proxy addresses are used in place of next hop addresses so that a large routing table is not required. The vibrator current control circuit 13 comprises a variable capacitance diode 14 that controls the vibrator current, and capacitors 1 to 3. By means of the arrangement of cable meshes, an upright orientation of the tower of each wind turbine in the assembly can be achieved by appropriately setting the interlevel spacing of the cable meshes. Equivalence of hierarchical blocks is individually checked, in view of the lemmas. The incremental update transactions are transmitted to the systems that provide navigation-related features where they are used to form updated parcels which are used in place of the corresponding parcels from the original version.