Abstract: A system for directional detection of radiation, comprises a plurality of scintillating crystals, responsive to the radiation and being arranged three-dimensionally, with voids between adjacent crystals, such that there are crystals that are inner and crystals that are outer within the arrangement. The system also comprises a plurality of light sensors coupled to the crystals for receiving optical signals from the crystals and responsively generating electrical signals, and a data processor receiving an electrical signal separately from each light sensor and calculating a direction of the radiation based on relative intensities of the signals and mutual occultation among different crystals.

Abstract: A device for detecting neutrons comprising a base, a lateral surface and a cover, thereby providing a detector housing having a central longitudinal axis, wherein the interior of the housing is divided into n (n?2) cells wherein at least one of said cells is adapted to operate as neutron detection ion chamber by having at least one removable foil disposed parallel to said longitudinal axis, at least one removable foil positioned adjacent to, and essentially parallel with, a sector of the lateral surface, with said removable foils having neutron sensitive coating applied on at least one their faces, and an anode mounted in at least one cell bounded by said removable foils, with said housing constituting the cathode. The device is also useful for simultaneously detecting gamma irradiation and or producing radioisotopes.

Abstract: An environmentally friendly method is provided for supporting the formation of microfloral soil crust, particularly in disturbed or contaminated areas, by treating soil with suspension containing microfloral propagules collected with runoff water on undisturbed sites. The method reduces spreading of contaminations from afflicted areas. Also provided is a composition of microfloral propagules for supporting the soil crust formation, which composition is in the form of suspension or powder.

Abstract: It is provided an alarm system for underground boundary intrusion detection, and methods for deployment and operation. The deployment method includes constructing of a computing-and-empowering apparatus, connecting thereof a longitudinally extended power-and-communication cable, connecting addressable junction-units, storing a physical location and an address of each junction-unit in the computing-and-empowering apparatus, connecting each addressable junction-unit to a wired-mole having a wire bundle which initially is contracted there within and measurable physical characteristics, and infiltrating the wired-moles normally into ground to a desired depth. In operation, the sensors frequently measure the physical characteristics of the wired-mole, deliver the measurement of the physical characteristics to the computing-and-empowering apparatus, which stores and analyzes the measurements, comparing past and present measurements.

Abstract: A night sight assembly includes a backsight and a foresight. The foresight has a glowing portion, while the backsight is in the form of a diffraction grating.

Abstract: Recovery of uranium from crude wet process phosphoric acid (WPA) by cation exchange using as cation exchanger a resin comprising active amino phosphonic or hydroxy phosphonic groups linked to a matrix. The operational steps comprise reduction of uranium in the WPA to the tetravalent state, contacting the WPA with the cation exchange resin to load the latter with tetravalent uranium, displacing Fe.sup.+2 from the resin, washing the resin with aqueous ammonia, eluting the resin with a carbonate-bicarbonate solution and precipitating uranium from the eluate.

Abstract: A level comprises a sealed casing which holds a liquid and has a flat bottom end. It also includes a light admissive top section, bearing a periodic grating of alternating transparent and opaque stripes. A float is in the liquid inside a compartment of the casing underneath the light admissive top section. The float is capable of changing its position inside the chamber so as to retain its position relative to the horizon when the chamber is filled, and a mirror on the top face of said float.