Abstract: A process for decontaminating radioactive material comprises the step of contacting the material with a dissolving composition to dissolve the contaminants in the material, said composition comprising a dilute solution of about 0.05 molar ethylene diamine tetraacetic acid, about 0.1 molar carbonate, about 10 grams per liter hydrogen peroxide and an effective amount of sodium hydroxide to adjust the pH of the composition to a pH from about 9 to about 11. Also included are the steps of separating the dissolving composition containing the dissolved contaminants from the contacted material and recovering dissolved contaminants from the dissolving composition that has been separated from the material. A composition for dissolving radioactive contaminants in a material, comprising a dilute solution having a basic pH and effective amounts of a chelating agent and a carbonate sufficient to dissolve radioactive contaminants is also provided.

Abstract: A system for marking a plurality of zones within a cellular service area. One or more marker transmitters are disposed throughout a cellular area to transmit a zone identification signal that is independent of normal RF cellular coverage to a mobile or portable cellular receiver. Each zone identification signal is transmitted in a radio frequency coverage area that illuminates the zone to be identified and is constrained by a similar transmitter jamming the zone signal. The marker transmitters are programmed to transmit the zone identification signal during a predefined time slot so that more than one marker transmitter may simultaneously transmit the zone identification signal, thereby increasing the area in which the zone identification signal can be received by the mobile unit. In order to reduce the area in which a zone identification signal may be received by a mobile unit, the marker transmitters may transmit a jamming signal at the same time as the zone identification signal is transmitted.

Abstract: A projectile having an efficient integrated propulsion system such that the projectile can guide itself to a target. The projectile comprises a body in which eight supersonic nozzles are positioned. The nozzles are arranged such that each nozzle can provide a reaction force having nonzero components along first and second axes that are fixed with respect to the body and orthogonal to one another. The nozzles are arranged in first and second groups of four nozzles each, the first and second groups being spaced from one another along a third axis orthogonal to the first and second axes. The third axis is generally parallel to the course of the projectile towards the target. The nozzles in each group are arranged such that for each direction along each of the first and second axes, two nozzles of the group can produce a reaction force having a nonzero component along that direction. Each nozzle preferably comprises a Prandtl-Meyer expansion nozzle that is lineraly elongated along the third axis.