A method for devices that are near each other to exchange owner profile information. In an example, an optical transmission link includes an input port and an output port. The collapsible canopy and flexible poles can be secured to a base sheet, which itself is attached to a flat surface such as a massage table. Fabrics including the photovoltaic fibers can be utilized in any suitable application or photovoltaic collector. Each of the first fibers has a diameter of 1-50 \u03bcm.