A wheeled object or vehicle, such as a hospital bed comprises a main chassis or frame supported by a plurality of supporting wheels or rollers, which define the vertices of a polygonal supporting surface. In one embodiment, the system includes at least two bone anchors, at least one of which is provided with an angularly adjustable connector. The method also includes creating, from input received by the user, an opportunity with respect to an offer, identifying members of a target user community in the network based on the input from the user, and posting the opportunity over the social network to the members of the target user community. The Phosphorescent Acrylic Resin compositions disclosed herein may be used in thermoform and thermoset applications to produce solid-surface acrylic resin products with a robust glow-in-the-dark property. A method of operating a satellite is also described.