A target object detection device is provided. Two or more metal segments are formed over a semiconductor structure with an air gap or a porous dielectric between the metal segments. It also relates to a process for preparation, and a method for using such a composition. Knowledge clusters are generated to represent fundamental building blocks of knowledge accessible through the reference information model. The projections will remain extended sufficiently above the cover to provide a warning to pedestrians that walk thereon, such as when approaching a traffic area or other hazard.