The edge effect or variation in polishing edge profile on a substrate undergoing CMP is reduced by structuring a retaining ring, housed in a carrier head for retaining the substrate, such that the polishing edge profile shifts back and forth with respect to the center of the substrate. Output electric current of excitation winding 3 is rectified by rectifier 8 and is supplied to field winding 5 of rotor 4. The opening is suspended above a generally open area of a lower level. In a first mode of the invention for implementing virtual active set updates, the network authorizes the user equipment unit to report to the network the occurrence of certain network-specified events which are acted upon by the network for communicating virtual active set update information to the user equipment unit. The acoustic communication solutions with these ear-devices may include: providing two-way communications in normal conditions as well as in noisy conditions, providing protection of hearing, recording the true sound field bin-aurally, providing a playback capability, providing volume enhancement and equalization for persons with hearing defects, etc. Even when a terminal epoxy resin is contained as the epoxy component of a thermosetting epoxy resin composition containing an aluminum chelatesilanol curing catalyst system, the epoxy resin composition can be configured to cure rapidly at low temperatures without termination of polymerization.