Reconfiguration of a continuously available routing network of a publishsubscribe system is achieved by quiescing data messages and control messages within the routing network to preserve first-in first-out ordering thereof, and then, reconfiguring the quiesced routing network. The device and method further include a device for adjusting a temperature or a temperature distribution of at least one region of the optical element for providing a predefined chromatic dispersion of the optical element. Each of the personal items includes an effective amount of activated carbon, so that use of the personal items reduces the available scent to be detected by animals in the wild. The apparatus provides a plasma choke aperture that reduces the volume of the process zone around the periphery of the substrate thereby eliminating uneven deposition of material around the edge of the substrate. The top layer dissolves in cold water and the base layer decomposes in the plumbing system. The invention also encompasses a needle safety sleeve and a blocking structure for use with injection devices.