Abstract: A universal adjustable insole with an arch support said insole and arch support is positioned under a foot and is sized and shaped to be removable placed within a foot support enclosure worn by a user. The insole comprises a top layer, a lower layer, a pocket between top and bottom layers corresponding to the arch-of-the-foot portion of the top pad layer for the arch support and one or several inserts free disposed inside said pocket.

Abstract: Optical signals are passed in an optical medium using an approach that facilitates the mitigation of interference. According to an example embodiment, a filtering-type approach is used with an optical signal conveyed in an optical fiber, such as a multimode fiber (MMF) or a multimode waveguide. Adaptive spatial domain signal processing, responsive to a feedback signal indicative of data conveyed in the multimode waveguide, is used to mitigate interference in optical signals conveyed in the multimode waveguide.