Abstract: A system/method of diagnosing combinations of failures in a system includes receiving symptom data (116) including information relating to observed or detected symptoms in a system. The system/method generates (D4a, D4b, D5) failure data (118) including information relating to at least one most probable failures in the system based on the symptom data, and processes (D9) the failure data and the symptom data using an L-best inference (e.g. a Ranked Algorithm (RA)) technique in order to generate failure set data (120), the failure set data including information relating to at least one most probable combination of the failures that explain the symptoms.

Abstract: A system and method are disclosed for analyzing transfer of data over at least one network, including a device configured to select a subset of users from a user base of at least one network. The system can include a device configured to analyze data relating to potential unlicensed data transfer by the subset of users, and a device configured to generate an estimate of unlicensed data transfer by the user base based on the analysis of data of the subset of users.

Abstract: Methods and apparatus for finding a bias voltage (20) corresponding to a quadrature point of an optical modulator, the modulator comprising a biasable component which is configurable to be biased by application of the bias voltage (20) such that the modulator operates at quadrature, the method comprising: providing a target for the output power of the modulator which corresponds to quadrature; applying, to the biasable component, a bias voltage (20) having an initial value; thereafter, finding a value for the bias voltage (20) that biases the biasable component such that the output power of the modulator is within a pre-defined range of the target by, starting at the initial value, alternately increasing and decreasing (or decreasing and increasing) the bias voltage (20) with gradually increasing amplitude; and identifying the found value for the bias voltage (20) as a bias voltage corresponding to a quadrature point of the optical modulator.

Abstract: The invention relates to the provision of virus scanning capabilities in a network environment. Optimum use is made of a plurality of virus scanners by inspecting content passed over the network to identify which of the scanners is most suitable for that content. The content is then passed to the appropriate scanners in dependence on the results of the inspection.

Abstract: A mobile communications fraud detection system is provided in which one or more probe devices are deployed to intercept predetermined types of data being carried over selected interfaces within the mobile communications network. In particular, the probe devices are arranged to intercept data being carried between equipment responsible for providing the air interface to mobile communications devices using the network and equipment interfacing with the mobile network's core switching equipment. Fraudulent activity relating to gateway fraud, revenue sharing fraud, credit or debit card fraud, spam generation and fraudulent or other activity indicative of the presence of malware executing on a mobile communications device.

Abstract: A communications network router is described for secure routing of calls between domains of different classification levels. The network router includes a first communications port arranged to receive a first communications channel of a first domain, a second communications port arranged to receive a second communications channel of a second domain, a switch apparatus arranged selectively to connect the first port to the second port to establish a communications link between the first and second domains. The first domain has a different level of classification to the second domain.

Abstract: A method and apparatus for determining actions for entities (4, 6) such that a goal is accomplished constraints are satisfied. The method comprises: determining an initial plan comprising actions that, if performed by the entities (4, 6), the goal would be accomplished; determining that a constraint would not be satisfied if the initial plan was implemented; and iteratively performing steps (i) to (v) until a final plan that accomplishes the goal and satisfies the is determined. Step (i) comprises identifying a constraint that is not satisfied in part of the current plan. Step (ii) comprises determining a remedy that, if implemented, satisfies the identified constraint. Step (iii) comprises updating the goal specification to include the remedy. Step (iv) comprises, using the updated goal specification, determining a further plan that accomplishes the goal and the remedy. Step (v) comprises determining whether or not the further plan satisfies each constraint.

Abstract: Disclosed is an ATC Radar and a method of operating an ATC Radar, comprising the steps of: receiving In-phase (I) and Quadrature (Q) signals; creating first and second complex clutter maps using the I and Q signals; wherein the first map comprises data which is dynamically updated on a per-scan basis and the second map comprises data indicative of a static environment with no targets; subtracting data from the second map from the received I and Q signals to mitigate the effects of static objects in the environment, to yield compensated I and Q data; using the compensated I and Q data for target detection an/or tracking.

Abstract: An antenna installation comprises a plurality of antenna assemblies (10) mounted in respective enclosures (12). The enclosures are interconnected by flow connections (14) allowing passage of dry air supplied from a dry air panel (16). Having passed through all the enclosures, the dry air exhausts through a dry air return (18). The dew point of the air in the dry air return is detected by a dew point sensor (22). An air flow sensor (24) is disposed downstream of the dew point sensor and signals alarm if the air flow falls below a preset threshold.

Abstract: A selective layer melting or other additive layer fabrication method in which powdered material is fused by heating it with a pulsed laser, the pulses being modulated while the laser is traversing the substrate so as to control the thickness and/or width of the layer being formed. Initial layers of the fabrication structure may be formed more thickly than subsequent layers, e.g. by means of a CW laser, to reduce distortion. This aspect of the invention may be employed independently of the use of a pulsed laser to form the subsequent layers.

Abstract: A data transfer system is disclosed for an unmanned vehicle on a mission. The data transfer system can include a first sensor associated with the unmanned vehicle for collecting a first data set, and a second sensor associated with the unmanned vehicle and for collecting a second data set, wherein the second data set is associated with the first data set by a predetermined association. A transceiver can transmit data from the unmanned vehicle to a remote data storage system. A mass data storage computer located on the unmanned vehicle can store the first and second data sets based on the predetermined association, and execute requests from the remote data storage system to transmit the first data set from the unmanned vehicle to the remote data storage system, and to transmit selected ones of the second data set from the unmanned vehicle to the remote data storage system.

Abstract: Apparatus and method are disclosed for co-aligning a number of laterally displaced radiation beams from respective radiation source outputs, each beam having a respective waveband. The apparatus comprises a collimating element for receiving each of said radiation beams with respective lateral displacements and a combining element for receiving each of said radiation beams passed by said collimating element. The apparatus further comprises a radiation source mount for positioning the radiation source outputs relative to the collimating element. The method comprises longitudinally positioning the radiation source outputs upon the mount, relative to the collimating element, in dependence upon the waveband of each beam, to cause the radiation beams passed by the combining element to be co-aligned.

Abstract: Disclosed is a method of providing selective attenuation in a Radar receiver, comprising the steps of: receiving a plurality of returns; identifying in a first scan, a return of a magnitude exceeding a predetermined threshold; applying in a subsequent scan, a predetermined desensitisation profile to said return. Also disclosed is a Radar receiver arranged to perform the method.

Abstract: The invention relates to Insensitive Munition (IM) energetic materials particularly non-phthalate IM propellant compositions. An energetic composition suitable for use as a propellant comprises the following components in the following relative proportions: component A; from 60% to 90% by weight of a highly energetic filler comprising at least one nitramine compound; and component B: from 5% to 20% by weight of a binder, component C: from and 3% to 15% of a plasticiser wherein the plasticiser comprises formula (A) of from 1% to 9% by weight, wherein Formula (A) is a diester plasticiser of R1—OC(O)—R3—C(O)O—R2, ??Formula (A) wherein R1, R2, and R3 are independently selected from C3 to C10 alkyl or alkenyl. the percentages by weight of components A, B and C, together with minor additives, if any, adding to 100%.

Abstract: The invention relates to Insensitive Munition (IM) energetic materials particularly IM propellant compositions, and yet further to nitrocellulose-free IM propellants. An energetic composition suitable for use as a propellant comprises the following components in the following relative proportions: component A; from 5% to 25% by weight of an IM energetic filler; component B: from 50% to 80% by weight of a highly energetic filler comprising at least one nitramine compound; component C of from 5% to 20% by weight of a binder; and component D of from 3% to 15% by weight of a plasticiser; the percentages by weight of components A, B, C and D together with minor additives, if any, adding to 100%.

Abstract: Methods and systems are disclosed for radio positioning of a mobile receiver using a virtual positioning reference established by logging a known position of the mobile receiver together with a local time at which a first instance of a predictably repeated code word is received by the mobile receiver from a terrestrial radio signal transmitter. During movement of the mobile receiver from the first known position to a second unknown position, a local clock is used to determine the time difference between when the virtual positioning reference is predicted to receive a second instance of the code word and when the mobile receiver actually receives the second instance of the code word.

Abstract: A method for electroless metal deposition on a surface in a finely dimensioned space (e.g. the bore of a hollow fiber) includes introducing into the space an electroless plating solution that has a nil or relatively low plating rate at normal room temperature, and thereafter heating the structure to an elevated temperature for a period sufficient to cause metal to plate on the wall surface. The introducing and heating may be repeated as necessary or desired to build up a specified thickness.

Abstract: An optical component for a display apparatus comprises an optical waveguide part (11) arranged to guide light therealong between surface parts thereof by internal reflection, an input part (13) arranged to receive light and direct the received light into the optical waveguide part, and an output part comprising a partially transmissive angularly reflective optical coating (25) arranged upon a surface part of the optical waveguide part. The output part is optically coupled to the input part by the optical waveguide part to receive guided light and to transmit some but not all of said guided light out from the optical waveguide part. The angularly reflective optical coating extends along a dimension of the optical waveguide part to expand the guided light in said dimension along the output part by repeated partial transmission thereof for output.

Abstract: The following invention relates to high energy capacitors with increased thermal resilience over conventional bulk ceramic capacitors, particularly capacitors that may be formed into a three dimensional shape to fit inside an existing device. The capacitor is provided with first and second electrodes which have a plurality of interlocating protrusions, which increase the relative surface area of the electrodes. The first and second electrodes and interlocating protrusions are provided with through holes. The devices are filled with a flowable dielectric material.

Abstract: Disclosed are methods and apparatus for operating a sensor (14). The methods comprise: providing a database (20,22) containing sets of algorithms, each set comprising one or more algorithms selected from the group consisting of control algorithms for controlling operation of the sensor (14) and data processing algorithms for processing sensor data output by the sensor (14); coupling a sensor unit (8) to a sensor hub (10) located onboard a vehicle such that the sensor unit (8) is detachably connected to the sensor hub (10) and located onboard the vehicle (2), the sensor unit comprising the sensor (14); acquiring, by the sensor hub (10), from the sensor unit (8), configuration data relating to the sensor (14); providing, to a further module (18), by the sensor hub (10), the configuration data; and selecting, using the configuration data, by the further module (18), from the database (20, 22), a set of algorithms.