An apparatus and method that provides management and cooling of an optical fiber by looping the optical fiber around the inner surface of a heat-conductive cylinder and around the outer surface of the heat-conductive cylinder, such that the optical fiber enters and exits the heat-conductive cylinder on substantially the same plane. or more, again hot rolling, solution heat treating and artificial aging. The major advantage of this apparatus is that a single tower can be constructed containing the functionality of both a communications tower and a wind turbine tower. The control signal is generated by comparing the amplitude of the xDSL signal applied to the electric circuit with an amplitude threshold value. Hepcidin can be used in the treatment of disorders resulting from iron overload while inhibitors of hepcidin can be used in the treatment of anemia. When the drawing section arrives at the pick-up point, the head lowers again from the stand-by position.