Abstract: Apparatus for measuring and recording a time-varying radiation absorption profile of an object undergoing a change that causes such a variation, includes: a continuous radiation emission source; a plurality of radiation detectors; a signal-reversing switch, connected to the detectors; a plurality of signal integrators for each detector, the integrators for each detector being connected to their detector by the signal-reversing switch, with portions of the plurality of the integrators being combined in banks of integrators, such that the signal reversing switch simultaneously connects the detectors with only the integrators of one of the banks; a control unit, connected with the signal reversing switch, for switching the signal reversing switch; a pulse generator, connected to an input of the control unit; and a synchronous signal transmitter, connected to an input of the control unit, for resetting the signal reversing switch to the integrators of a first bank of integrators.

Abstract: The aim of the invention is an arrangement for the recording of projections, representing the instantaneous condition of a series of instantaneous conditions for the periodically changing distribution of the absorption behaviour, even for objects whose shapes or composition undergo rapidly repeating changes and from which the distribution itself may be reconstructed and which perform the above with a gamma source which continuously emits radiation.

Abstract: A measurement device is disclosed for measuring the conductivity distribution in liquids or multiple phase media flowing in any direction. A grid sensor has electrodes shaped as parallel electroconductive grid bars or wires located in two or three planes and electrically insulated from each other and from their mounting. The electrodes in the individual planes are mutually offset by preferably 90°. One of the planes, the middle plane when three planes are used, forms an exciter plane connected with a pulse generator, whereas the other planes(s) form receiver plane(s) coupled to processing electronics. in the disclosed signal generation process, the electrodes of the exciter plane are successively driven with a symmetrical bipolar rectangular pulse, and all non-driven electrodes are connected with low impedance to the zero potential.

Abstract: In a method of monitoring parameters of changes in space and time of seismic activity at predetermined points of investigation and times thereof in a region of investigation, more particularly the forecasting of earthquakes, the location and time of quakes of relative low strength (microquakes) are sensed in said region being investigated and the seismic activity of the microquakes is quantified in time and space by means of at least one parameter (SEISMOLAP) at the point of investigation and at the times of investigation, a probability value is established for the occurence of the parameter, and the development of the probability value in time is monitored to detect SEISMOLAP anomalies by clusters of microquakes and/or phases of relative seismic inactivity as activities leading up to more severe quake occurences more accurately in location and more reliably.