Abstract: An article of manufacture includes a set of three-dimensional elements, each having has a same size and the same shape, with at least three distinct faces on which content is provided. A first face on an element is a title page or a title face with text. The text represents certain hierarchical subject matter including a topic within a category. A second face is an icon page or an icon face with an icon, such as a graphic or line drawing. By being general, the icon provokes imagination beyond the topic expressed by the text. A third face is an image page or an image face with a photorealistic image of a scene, which may be a photographic image or computer-generated. On any given element, both the subject matter represented by the respective icon on that element and the subject matter represented by the respective image on that element are relevant to the topic represented by the respective text on that element.

Abstract: An MRIS gradient coil structure has coiled tubes for carrying a cooling medium to cool the coil structure. The inlet and outlet (15, 26) of the coiled tubes are insulated electrically from the remainder thereof by a ceramic insulator (20).