Abstract: The invention concerns an energy storage system and method to install the energy storage elements, subsequently called “energy tiles”, of the system on solid or flexible, flat or curved surfaces of any orientation. Individual energy tiles are identical in size, capacity and voltage and shaped like ceramic tiles. They cover free surfaces by a combination of serially and parallel connected energy tiles. The installation produces a pattern similar to that of ceramic tiles. An energy tile can be a lithium battery or a supercapacitor cell. Candidates for the installation are wall surfaces of buildings, internal and external roof surfaces, the back side of solar panels, tents and internal and external vehicle surfaces. The storage elements are individually removable without disturbing the remaining energy tiles of the system.

Abstract: An apparatus for obtaining tomographic X-ray images having enhances contrast properties comprising an X-ray radiation receiver (3). The radiation is received by a recording circuit (50) having an analog-digital converter (4) and two memories (8, 9) for storage of the image signals. The image signals are recorded during two movement cycles of the X-ray source (1), preferably perpendicular to each other. An analyzing circuit (51) is connected to the two memories. A contrast comparison is repeated over a plurality of original images made between image elements adjacent each other. The result of this comparison is used for improvement of the original images with respect to the contrast in a transformation circuit (52), the improved images being visible on a monitor (43).