According to an embodiment of the invention, a filer or other storage server is coupled to a network to store files for users of the network. A method of introducing water into soil by passing water through slots that frictionally engage soil to permit water to pass through the slots and which prohibits the excessive passing of soil particles through the slots. Hereby is obtained that the root section of the blade can be shortened and the maximum chord of the wind turbine blade can be moved closer to the hub, whereby the part of the blade exploiting the wind is increased and the power output similarly increased. The wings are bent at multiple angles forming legs, a first angle being greater than 90 degrees, a second angle being normal to the planar center portion. The image sensor could further comprise a lens structure or an optical coupler or an optical coupler over the optical pipe, wherein the lens structure or the optical coupler or the optical coupler is operably coupled to the optical pipe.