This document describes, among other things, systems and methods for measuring reputation using take volume. The warp threads are arranged in the longitudinal direction of the tubing and the weft threads are arranged in the circumferential direction of the tubing. The active layer and the second semiconductor layer are stacked on the second surface in that order, and a surface of the second semiconductor layer away from the active layer is configured as the light emitting surface. For each contact location, a computer software application stores a history of contact position information and, from the position history, determines a velocity for each contact location. This invention comprises a flotation collar and brush member which may be attached to a subsea conduit and which may travel up a subsea conduit as a result of buoyancy forces and be retracted using one or more winches.