A system and method for searching for Internet-based repositories within a distributed computing environment are provided. In one embodiment, display normal light that is parallel to a display normal of the flat panel is provided. Each storage cell contains at least one cell transistor, which in turn contains first doped regions and second doped regions, one of which is a source and the other a drain. Data from each of the echoes can be assigned to a single line of k-space of a distinct image, and stored in memory of the apparatus. The combined system then is solved. A field emission device according to the present invention includes a cathode electrode formed on an insulating surface of a substrate and a convex electron emission portion formed at a surface of the cathode electrode, and the cathode electrode and the electron emission portion include the same semiconductor film.