A hole is drilled at a depth of about 5 to 6 m from the ground surface, a shelter outer shell floor slab 3 is provided, and a shelter inner shell 1 is provided thereon. The other area of the substrate except the light-receiving elements is exposed. A slider is mounted on each suspension. For each particular code statement, the process generates predicate statements that describe an effect that the statement has on the predicates of interest. In one embodiment, an application client registers in either an integrated mode or a standalone mode based whether an application availability notification is received within a predetermined period of time. Furthermore a corresponding optical characterisation device is described.