In one embodiment, a method includes accessing first data describing online activities of a user and accessing second data describing online activities of each of one or more content publishers. The screen unit is formed of robust expanded metal mesh to discourage intrusion therethrough. The monitor 3 displays a synthesis image in which a downward view of the close view and a perspective image of the intermediate-to-distant view are synthesized. The feedback circuit is coupled to the output terminal and is configured to generate a feedback signal based on an actual voltage level at the output terminal. The incoming pump power may be provided by the signal transmission fiber or by a pump power transmission fiber. The preparations and methods involve 1-EBIO.