Free standing articles or articles at least partially coated with substantially porosity free, fine-grained andor amorphous Co-bearing metallic materials optionally containing solid particulates dispersed therein, are disclosed. The system employs an improved similarity operator for signal differentiation. The horn can serve as a mounting structure for the antenna element. The container bottom slopes downwardly away from the open front of the container, and the back of the container slopes upwardly away from the open front to promote forming a stack which is slightly inclined to vertical when the container rests on the horizontal surface. The apparatus can include adding an adsorption zone upstream of a hydrocracking zone and a downstream of a vacuum distillation zone to adsorb polynuclear aromatic compounds originating from a feed provided to the vacuum distillation zone. The captured image preferably includes a person attending the entertainment event and can be a motion image or a live motion image.