Abstract: A method is provided for securing a mobile communications device to a level required for accessing a network, for example a secured enterprise network, by means of a public network such as the Internet. A mobile communications device is also provided incorporating functionality to enable centralised control over the configuration of the mobile device and thereby to control the actions of users of that device and of applications software that may be installed and executed on that device. Furthermore, a system is provided to implement a mobile communications infrastructure for an enterprise network with centralised control over the configuration of mobile communications devices within the system.

Abstract: Non-linear Transmission Line Device A non-linear transmission line device includes a magnetic element having at least one end profiled to reduce demagnetisation when the element is biased. The profile may be tapered, stepped, or smoothly curved. Also disclosed is a non-linear transmission device made up of a solid magnetic element, typically of flat rectangular form.

Abstract: A system wherein control of a safety-critical system operation is effected by sending a plurality of keywords via a low integrity communication path.

Abstract: A specific emitter identification (SEI) method and apparatus is capable of identifying and tracking objects within a geographical area of interest wherein the system and method has not been preprogrammed to look for particular signals. The system and method receives all of the emitted electromagnetic signals emitted from area of interest. The system and method next performs high order statistical analysis on the received signals and determines which signals emanate from possible targets of interest and which likely emanate from background clutter/noise by comparing the relative degrees of Gaussianness of the signals (for example using entropy measurements). The least Gaussian signals are deemed to likely be signals from potential targets of interest while those which are more Gaussian are deemed to be likely from background clutter or noise.

Abstract: A fibrin-based hemostatic agent suitable for both civilian and military use is disclosed. The hemostatic agent comprises (i) nanoparticles to which a plurality of Knob-A recognition sequences are attached, and (ii) coiled-coils of recombinantly-produced human fibrinogen ? and chains and the ? chain globular domain. A delivery system for the hemostatic agent also is disclosed, which additionally comprises means for delivering (i) and (ii) to a wound site. The delivery means may be a CO2 canister or a shaker jet.

Abstract: A tactile cueing apparatus for incorporation in an aircraft flight control system comprising a flight control surface, and a pilots inceptor (12) for moving the surface via a servo-assisted mechanical linkage (28) connecting the inceptor to the control surface, the apparatus comprising a force sensor for sensing a force applied to the inceptor by the pilot to move the control surface, an electromechanical actuator (34) configured to be installed with the mechanical linkage between the inceptor and means in the system providing said servo-assistance, and control means programmed to cause the actuator (i) to move so that the linkage moves to a position determined by said force according to a predetermined relationship, (ii) to apply to the inceptor a resisting force according to a predetermined relationship and which when the linkage has moved to its commanded position is equal and opposite to the force sensed by the force sensor.

Abstract: Apparatus for co-aligning a plurality of laterally displaced radiation beams, each beam comprising a respective waveband, is disclosed. 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 to cause the radiation beams to become co-aligned. At least one of the collimating element and the combining element comprises an anti-reflection layer for minimising reflection of the radiation beams from the at least one element. The layer comprises an array of microstructured protuberances which extend away from at least a portion of a surface of the respective element, and which comprise a cross-sectional area which reduces along the length thereof, from a proximal end of the protuberance disposed proximate the surface to a distal end of the protuberance.

Abstract: A tunable frequency transmission line pulse forming network circuit for forming a waveform having a spectral content. The pulse forming network circuit comprises a dielectric material; a ground section; a stepped shaped charged section, with the charged section having a plurality of stages including a first stage; a power supply coupled to the pulse forming network circuit for charging the pulse forming network circuit; a switch coupled to the pulse forming network circuit for periodically discharging the pulse forming network circuit; and an antenna coupled to the pulse forming network circuit for propagating a high-power microwave signal from the pulse forming network circuit into the environment. At least the first stage of pulse forming network circuit has one of a tunable magnetic material and a nonlinear magnetic which facilitates adjusting the waveform and the spectral content of the waveform emitted by the pulse forming network circuit into the surrounding environment.

Abstract: A method of weather observations by a constellation comprises at least a first duster of three micro-satellites each orbiting around earth, and each micro-satellites comprises a spectrometer. Orbiting the three micro-satellites of the first duster around the earth in three separate orbits offset with respect to one another. Staggering the three micro-satellites with respect to one another as they orbit. Selecting the offset and the staggering, of each of the three micro-satellites with respect to one another, so that each one of the three micro-satellites have a substantially identical viewing area as each one of the three micro-satellites orbits around the earth.

Abstract: A glare visor (13) for reducing ambient light intensity perceived by a wearer viewing a head-up display (3) employing display light (7) including a given wavelength(s) of light. The visor includes a visor body comprising optically transparent material which is partially absorbing of light of visible optical wavelengths thereby to reduce the intensity of ambient light transmitted therethrough to the wearer. A transparent optical coating (12) is formed upon a surface of the visor body which is partially transmissive of light of visible optical wavelengths amongst which it is preferentially transmissive of light of a sub-range of wavelengths for including therein the wavelength(s) of display light. This permits a perceived enhancement of contrast between display light (7) relative to ambient light (8).

Abstract: A bidirectional radio frequency communication unit includes: a transmit modem; a receive modem; an RF transceiver circuit; a coupling waveguide arrangement; and an antenna. The RF transceiver circuit transmits and receives at RF frequencies greater than or equal to 50 GHz. At least a majority of the RF transceiver circuit is provided on a single multilayer PCB. The coupling waveguide arrangement is provided in the form of respective transmit and receive waveguides provided within a diplexer that has a common antenna coupling port and is in the form of a block. The multilayer PCB and the diplexer form a laminated structure; and transition interfaces between the RF transceiver circuit and the waveguide include one or more buried layer probe elements in a buried layer of the multilayer PCB.

Abstract: The invention concerns a method for repeatable ignition of propellant charges in a weapon system, e.g. for firing shells from a barrel weapon, through electrical discharge in a combustion chamber duct (3) containing a combustion chamber substance (30), wherein the filling gas in the combustion chamber duct (3) is ionized by the high-voltage potential applied to the ionizing electrode (7), which is connected to a first high-voltage generator (2), thus increasing the electrical conduction capacity in the combustion chamber duct (3) such that an electrical sparkover through electrical discharge via a second high-voltage generator (5) between a rear electrode (22) and a front electrode (21) is generated and produces an effect, with subsequent ionization of the surface of the combustion chamber substance (30), which causes hot gas in a plasma-like state to be expelled from the combustion chamber duct (3).

Abstract: The invention relates to a surface inspection device; more specifically to the inspection of complex geometry welded joints. There is provided a device suitable for structural health monitoring of a surface said device comprising; a guide rail and a platform comprising at least one sensor, wherein said platform is cooperatively engaged with said guide rail, when said platform traverses along the rail.

Abstract: A low RCS array panel employs a number of linkable support segments. Each support segment has several junctions spaced along it, and the support segments are designed to connect with each other at the junctions to create a support grid. The segments can connect orthogonally, and the junctions can be spaced according to the frequency performance requirements for the antenna the array panel is designed to support.

Abstract: A column readout amplifier and imaging array using the same method are disclosed. The column readout amplifier includes a signal amplifier having an amplifier signal output, a first filter capacitor, a buffer amplifier having a buffer amplifier input and a buffer amplifier output, and a switching network. The switching network connects the amplifier signal output to the buffer amplifier input and the buffer amplifier output to the first filter capacitor during a first time period, and connects the amplifier signal output directly to the first filter capacitor during a second time period. The time periods can be of fixed duration or determined by the difference in potential between the input and output of the buffer amplifier. The column readout amplifier can be used in an imaging array to readout columns of pixels.

Abstract: An airborne hyperspectral scanning system with a reflective telecentric relay including a system housing fore-optics, mounted in the housing, an imaging spectrometer mounted in the housing, the imaging spectrometer comprising a spectrometer slit, the spectrometer slit having an exit side and an entrance side, a focal plane array, a fold mirror, and at least three spectrometer mirrors, ordered sequentially, and in optical alignment with each other, and a reflective telecentric relay, mounted in the housing between the fore-optics and the imaging spectrometer, the reflective telecentric relay comprising a collimator module, a scanning mirror module, and an objective module, the objective module being situated to receive intermediate image from the fore-optics and reflect a collimated beam to the scanning mirror image between the collimator module and the objective module, wherein the objective module is situated to form a telecentric image at the entrance of the spectrometer slit.

Abstract: A method for extending dynamic range of a display that can attenuate brightness to match scene brightness is disclosed. Standard RGB sub pixel filtering as well as neutral density sub pixel filtering is performed. The color addressability of the display is utilized to extend the dynamic range of the emitted energy by more than one order of magnitude with the standard RGB sub pixel filtering. The standard filtering extends the dynamic range of the emitted energy by more than one order of magnitude, while the neutral density filtering extends the dynamic range of the emitted energy by two or more orders of magnitude.

Abstract: A machine is on a first side of a plate (20) and a rod (50) passes along or through the plate (20). The plate (20) is susceptible to vibrations arising from operation of the machine. An active vibration suppressor (60) is mounted on the rod (50), and a controller is configured to control the active vibration suppressor (60) to suppress vibrations of the plate (20).

Abstract: A light source for a colour display apparatus (1) for displaying light at optical wavelengths corresponding a plurality of different colours sequentially, comprising a plurality of light-emitting diodes (3, 4, 5) each respectively operable to emit light to display a respective one of the plurality of different colours, a power source (26) connected to the plurality of LEDs for supplying power thereto a plurality of capacitor units (7, 8, 9) connected to the power source to be provided thereby with charge for generating a respective one of a plurality of different respective forward bias voltages for application to the LEDs to operate the LED. A control unit (10) is operable to selectively connect a capacitor unit to an LED for applying a desired one of the different said forward bias voltages thereto according to the colour of light which the LED is operable to display.

Abstract: A phase coherent fractional-N phase-locked loop synthesizer for maintaining phase coherence of a synthesized frequency includes a phase coherent delta-sigma modulator (DSM) having a plurality of feed-forward accumulator stages. The DSM is operatively coupled to a reference clock configured to generate a cyclical reference signal. The DSM configured to count a number of cycles of the reference signal, to cause, at each cycle of the reference signal, each of the stages of the DSM to accumulate a sum of a previous stage of the DSM, and to multiply each sum by a fractional divide word to produce a multiplier output, thereby causing the DSM to output a sequence of signals that tracks with the reference clock.