An extruded thin sheet foam is disclosed prepared from a polyolefin resin in which the blowing agent comprises a blend of from about 1 to 25% by weight of carbon dioxide and the balance of C3 to C4 VOCs. For example, the systems may receive a request for tailored content, facilitate a service dialog to obtain information related to the request, and communicate a plurality of tailored content based upon the information related to the request. The protrusions may be configured such that each antenna element lies on the buttocks and is situated adjacent to, or in front of, a greater sciatic notch of the pelvis. The sensitizing ring comprises a body, a plurality of teeth provided on an outer periphery thereof, and a plurality of gaps interposed between the teeth. Also provided is a superconducting article as a tape, in a power cable, and a power transformer.