Abstract: An electromagnetic coupler including: a substrate; and a first conductor mounted to the substrate for receiving a first electromagnetic signal, the first conductor having a first multiple arcuate edge; a second conductor mounted to the substrate, the second conductor being spaced apart from the first conductor and having a second multiple arcuate edge that is opposed to the first edge for generating in the second conductor a second electromagnetic signal that is derived from the first electromagnetic signal.

Abstract: Diverse types of crew interfaces (400, 430, 450) are provided for outputting visible, audio and tactile information to a pilot for flight control. A unified estimation of the current aircraft state and of a current phase of flight are made (110), based on flight status information. Respective coordinated visible, audio and tactile presentations for the diverse types of crew interfaces are generated, (120) coordinated so that they provide mutually consistent indications of the unified estimation of the current aircraft state, according to the unified estimation of current flight phase. The respective coordinated presentations are output (130) by the diverse types of crew interfaces to the pilot. By coordinating crew interface outputs across sight, sound and touch senses, this can relieve the pilot of workload in interpreting unsynchronised or incoherent outputs from different types of interfaces.

Abstract: An optical device 10 comprises an objective lens 11 defining a focal plane FP and an eyepiece 12 spaced apart therefrom, defining an optical axis OA therethrough. The optical device 10 comprises an optical member 13 having a first planar face 14, arranged on the optical axis OA proximal the focal plane FP, wherein the first planar face 14 is arranged to oppose the objective lens 11. The optical device 10 comprises a filter assembly 100 comprising a first notch filter 101 arranged to attenuate transmission of electromagnetic radiation having a first wavelength ?1, wherein the first notch filter 101 is arranged in front of the optical member 13. The first notch filter 101 is arranged at a first oblique angle ?1 to the optical axis OA whereby, in use, incident electromagnetic radiation having a predetermined wavelength ?i propagating along the optical axis is reflected by the first notch filter 101 away therefrom, wherein the first wavelength ?1 and the predetermined wavelength ?i are different.

Abstract: A thermal bridge for improving thermal transfer between a fuel element to a fuel block wherein there is provided a high temperature gas cooled nuclear reactor fuel block comprising a fuel channel and a coolant channel wherein the fuel channel comprises a fuel element, the fuel channel further comprising a thermal bridge thermally linking the fuel element and the fuel channel, wherein the thermal bridge comprises a melting point greater than the working temperature of the fuel block, thereby improving thermal transfer from the fuel element to the fuel block, thereby improving thermal transfer to the coolant channel.

Abstract: Apparatuses and techniques for reducing backlash between components in a transmission system are provided. The apparatuses and techniques provide a controllable torque over a target range of motion of a component in the transmission system. This eliminates the play at the interfaces between components and forces the components to maintain a controlled contact between the interfacing surfaces.

Abstract: A method of additive manufacturing an article from a feed material in a chamber includes evacuating at least some of a first gas from the chamber, thereby reducing a pressure therein from a first pressure to a second pressure and reducing the first gas from a first concentration to a second concentration. At least some of the first gas is then gettered from the chamber using a getter, thereby lowering the first gas concentration to a third concentration. The article is then additive manufactured from the feed material in the chamber using the getter as a substrate. The gettering comprises heating the getter at least in part using a fusion source, and the additive manufacturing comprises heating the feed material at least in part using the fusion source.

Abstract: There is provided an arming apparatus for a store, the apparatus comprising: a first attachment system and a second attachment system; a linking connector coupled with the first attachment system and the second attachment system; and an arming clip; wherein each of the first attachment system and the second attachment system comprises: a first frangible connector coupled with the arming unit and the linking connector; and a second frangible connector coupled with the linking connector and the store. The linking connector is coupled to the first attachment system via a first coupling arrangement and is coupled to the second attachment system via a second coupling arrangement, wherein the first coupling arrangement and the second coupling arrangement are different. Each of the first coupling arrangement and the second coupling arrangement are manually secure.

Abstract: There is provided an arming apparatus for a store, the apparatus comprising: a first attachment system and a second attachment system; a linking connector coupled with the first attachment system and the second attachment system; and an arming clip; wherein each of the first attachment system and the second attachment system comprises: a first frangible connector coupled with the arming unit and the linking connector; and a second frangible connector comprising a first end coupled with the linking connector and a second end comprising a clip, the second end being configured to pass through a lug of said store and then couple to the second frangible connector.

Abstract: A vehicle surface includes a set of retroreflectors configured to reflect, at least in part, incident hostile light towards a source of the incident hostile light.

Abstract: Techniques are provided for x-ray sensing for intraoral tomography. A methodology implementing the techniques according to an embodiment includes detecting an x-ray pulse based on energy received at one or more pixels of a pixel array. The method also includes integrating the energy received at each of the pixels of the array of pixels, in response to the detection, wherein the energy received at each of the pixels is associated with the x-ray pulse. The method further includes multiplexing readouts of analog signals from the array of pixels into two or more parallel channels. The method further includes simultaneously converting (or otherwise in parallel) the analog signals of each of the channels into digital signals and storing the digital signals in memory as frames of data. The method may further include, for example, transmitting the frames of data from the memory, over a Universal Serial Bus, to an imaging system.

Abstract: Disclosed is an antenna comprising a substantially elliptical element arranged substantially perpendicular to, and spaced apart from, a substantially elliptical ground plane, wherein the substantially elliptical element has a major axis which is substantially perpendicular to the ground plane, and a minor axis which is substantially parallel to the ground plane.

Abstract: An undercarriage unit is provided. The undercarriage unit comprises: a rotatable wheel; at least one electromagnet for releasably coupling the undercarriage unit to the aircraft; a switch for selectively activating and deactivating the at least one electromagnet; and a controller arranged to actuate the switch. An aircraft having the undercarriage unit is also provided.

Abstract: Disclosed is an apparatus for testing a device, comprising: a switch (100) arranged to replace a circuit breaker (30) associated with an individual system in the device under test, wherein the switch (100) is operable to be controlled remotely from the device under test such that the switch (100) either activates or deactivates the individual system.

Abstract: A method is provided to improve the impact point for at least one subsequent projectile fired towards a target, launched after an initial projectile, where the subsequent projectiles can alter their course, based on information on the previous projectiles' time of automatic detonation, to improve the ability to detect a target. A projectile and a fuse are also provided.

Abstract: There is provided a user-vehicle interface, comprising a gesture control system that is arranged to: sense a direction of a gesture of a user of the vehicle; and process the sensed gesture to control a location of an indicator on a display in accordance with that sensed direction, such that a location of the indicator is arranged to move in accordance with changes in the sensed direction, the indicator being used to show a current position for user interaction with content on the display, and being in a plane in which that content resides.

Abstract: According to a first aspect of the present invention, there is provided a reconnaissance and communication assembly, adapted to be launched from a gun barrel into the air. The assembly comprises a carrier (with a cavity) and a payload (within the cavity). The payload is arranged to be controllably expelled from the carrier and once expelled from the carrier, the payload transmits a signal.

Abstract: The invention relates to a method for the flow synthesis manufacture of RDX, comprising the steps of preparing input flow reagent A, comprising hexamine dissolved in nitric acid with a concentration less than 92%, preparing input flow reagent B comprising 99% concentration nitric acid, causing the input flow reagents A and B to enter a flow reactor at a flow rate, so as to cause a total nitric acid concentration of greater than 93%, in said flow reactor, cooling the reaction chamber to less than 30° C., causing the output mixed flow to be quenched.

Abstract: According to some examples, an energy harvesting assembly for a projectile comprises an inlet provided at the tip of a casing of the projectile, multiple outlets provided circumferentially around an outer surface of the casing proximate the tip, and an airflow channel structure extending from the inlet in a generally axial direction through a turbine to the multiple outlets.

Abstract: In some example, a method for regulating a trajectory of a projectile comprises adjusting the position of a mass within a cavity defined by a jacket of the projectile, whereby to modify a centre of gravity of the projectile.

Abstract: A sequencer for use with a countermeasure defense system includes an input signal indicative of firing an expendable, a circuit card that receives the input signal indicative of firing the expendable and an output analog signal from the circuit card that fires the expendable. The parameters of the output analog signal correspond to parameters of a digital waveform.