In the joint construction of cobalt-based alloy, a cobalt-based alloy layer 1, in which granular or massive eutectic carbide 2 disperses, is joined to a metal of a base metal 37 via an insert metal layer 36. A sidewall spacer is used as a mask to form a raised portion of a conductive layer. The access control policy set may include access control policies that allow or disallow access to computing resources. Since the camera-pupil center distance has been measured, a pupil center position in a three-dimensional space is determined from the above information. The connector system can be used to provide a secure connection of a coaxial cable, such as a coaxial energy cable, to a distribution box and thereby deter or prevent energy theft.