Abstract: A computer implemented method of detecting an increased vulnerability of a software system including a plurality of software components, the method including generating a vector representation of each software component derived from a neural network trained using training data defined from known vulnerabilities of the software components in the software system; aggregating the vector representations for the software component to an aggregate vector representation for a particular time; repeating the generating and the aggregating for a plurality of points in time to generate multiple generations of aggregate vector representations; and comparing the multiple generations of aggregate vector representations to detect a change in an aggregate vector representation exceeding a maximum threshold degree of change as an indication of an increased vulnerability of the software system.

Abstract: The power supply unit (1) of an optical fibre telecommunications network distribution point is provided with a power supply controller. The power supply unit (1) is connected to a plurality of power supply lines in the premises of a plurality of customers. A controller (6) controls the supply of power from the power supply lines to the power supply unit of the distribution point.

Abstract: A communications network comprises a plurality of stations which can communicate via a ring. Information is transmitted from one station to another in message blocks which circulate around the ring. The message blocks include control bits and a protocol is employed which ensures that no one station can monopolize the available message blocks. At any of the stations, an emptying block is utilized by that station as a reallocation trial slot and places its own address therein for passage round the ring. On its return a system reset is instigated to allow all stations to be reallocated blocks.

Abstract: A waveform recognition system including a plurality of detectors of features having the combined presence at a plurality of instants spaced at predetermined intervals relative to each other in time of instantaneous amplitudes each satisfying respectively predetermined constraints; apparatus for assigning a plurality of labels and corresponding confidence measures to each of successive portions of the waveform in dependence on the features detected in the portions and storing each label in a buffer corresponding to the rank of the confidence with which the label is assigned relative to other labels assigned to the same portion of data and apparatus for outputting labels from that buffer containing labels assigned with the highest confidence whose confidence measures are in a predetermined relationship with those of adjacent labels in the same buffer when the confidence measures of labels in other buffers containing labels assigned with confidence measures of lower rank satisfy predetermined conditions.

Abstract: A microphone unit for a telephone handset comprises a microphone mount, a microphone mounted in the microphone mount, a mouthpiece detachably fixed to the handset, and a moisture barrier assembly for preventing ingress of moisture into the microphone. The moisture barrier assembly is constituted by a moisture barrier, an annular seal and a support plate. The support plate has a perforated portion covered by, but spaced from, the moisture barrier. The moisture barrier assembly is positioned between the mouthpiece and the microphone mount. Venting means vents a space between the moisture barrier and the microphone. The moisture barrier is constituted by a moisture impermeable film whose peripheral edge portion is fixed to the annular seal. The seal is fixed to the support plate and seals against the front face of the microphone.