Abstract: The invention relates to a floating windmill installation (1, 1?, 1?), wherein the floating windmill installation (1, 1?, 1?) comprises: —a windmill (10, 10?) comprising a tower (14), —a floating installation (20, 20?) comprising an aperture (22) penetrating the floating installation (1, 1?, 1?) for accommodating the tower (14), and—means for raising and lowering the tower (14) up and down through the aperture (22).

Abstract: Apparatus is provided, comprising an implant-storage member (24), configured to be percutaneously advanced to a tissue (10) of a subject, and shaped to define (a) a space (26) that is configured to house an implant (22) configured to apply a current to at least the tissue, (b) an opening (28) through which the implant is deliverable to the tissue, and (c) at least one window (30), configured such that, while the implant is disposed within the space and the implant-storage member is disposed in the tissue, the window facilitates flow of the current therethrough from the implant to the tissue; and a delivery manipulator (34), reversibly couplable to the implant, and configured to facilitate delivery of the implant through the opening. Other embodiments are also described.