Abstract: A method of determining whether a radiotherapy device configured to provide therapeutic radiation to a patient should be authorised for use. The device comprises a plurality of components, each component of the plurality of components being coupled with at least one identifier configured to provide data identifying the component it is coupled with. The method comprises receiving, from the identifiers, data identifying each of the plurality of components of the radiotherapy device and determining whether at least one authorisation criterion is met based on the identifying data and authorisation data; and if the at least one authorisation criterion is met, determining that the radiotherapy device is authorised for use.

Abstract: An event monitoring system has a plurality of detector units for detecting neutrons or other emissions from radioactive materials (i.e., events). At least one of the detector units has a detector for the events and an amplifier to amplify signals generated by the detector. A signal handler receives the amplified signals and an adder adds to the signals an indication of the detector unit from which the signals originated. A combiner combines the signals. A serial link conveys the combined signals from the signal handler to a signal processor which includes a signal receiver for the combined signals. A time stamper applies to the signal an indication of time of the generation of the signal by the detector unit, and a computer processes the signals, including the time and detector unit indications, using software to produce information on the signals or events they represent.

Abstract: An event monitoring system has a plurality of detector units for detecting neutrons or other emissions from radioactive materials (i.e., events). At least one of the detector units has a detector for the events and an amplifier to amplify signals generated by the detector. A signal handler receives the amplified signals and an adder adds to the signals an indication of the detector unit from which the signals originated. A combiner combines the signals. A serial link conveys the combined signals from the signal handler to a signal processor which includes a signal receiver for the combined signals. A time stamper applies to the signal an indication of time of the generation of the signal by the detector unit, and a computer processes the signals, including the time and detector unit indications, using software to produce information on the signals or events they represent.

Abstract: A process for preparing a porous amorphous silica-alumina refractory oxide is described in which a source of silica, such as tetra ethyl ortho silicate, in a non-aqueous solvent, such as an alcohol, is hydrolysed by adding an aqueous solution containing aluminum ions, in particular a solution of aluminum nitrate, thereby to form a sol and calcining the sol at, for example, 200.degree. C. to 600.degree. C. The product, which may have a microporous or mesoporous structure, is useful in the separation of fluids, especially the separation of carbon dioxide from natural gas.

Abstract: A process for preparing a porous amorphous silica-alumina refractory oxide is described in which a source of silica, such as tetra ethyl ortho silicate, in a non-aqueous solvent, such as an alcohol, is hydrolysed by adding an aqueous solution containing aluminum ions, in particular a solution of aluminum nitrate, thereby to form a sol and calcining the sol at, for example, 200.degree. C. to 600.degree. C. The product, which may have a microporous or mesoporous structure, is useful in the separation of fluids, especially the separation of carbon dioxide from natural gas.

Abstract: A cement mixing and pumping simulator comprises actual and virtual equipment. In response to an operator controlling this equipment, signals representing operating characteristics of a cement mixing system realistically represented by the actual and virtual equipment are generated. These signals are communicated for displaying the operating characteristics to the operator so that the operator obtains real-time responses to the operator's control of the actual and virtual equipment.