Abstract: According to an aspect of the invention, there is provided a mortar bomb, comprising: a main body; a nose; a tail extending from the main body, away from the nose; an obturating ring groove for accommodating, in use, an obturating ring, the ring groove being located in the main body; wherein a maximum diameter of the main body is upstream of the ring groove, toward the nose.

Abstract: A free space optical communication system receiver (500) comprising: a central optical sensor (600); and a plurality of further optical sensors (601-604) disposed around a peripheral edge of the central optical sensor (600). The free space optical communication system receiver (500) may be coupled to means for moving the free space optical communication system receiver (500) relative to an incoming optical signal (510). A controller (508) may be configured to, using measurements of the incident optical signal (510) by the plurality of further optical sensors (601-604), control the means so as to move the free space optical communication system receiver (500) relative to the incident optical signal (510).

Abstract: Disclosed are methods and apparatus for selectively sintering particulate material, the method comprising: providing a layer (6) of particulate material; providing an amount of a radiation absorbent material over a selected surface portion of the layer (6) of particulate material; providing an amount of a material that comprises a plurality of elongate elements (16) over at least part of the selected surface portion of the layer (6) of particulate material; and providing radiation (8) across the selected surface portion of the layer (6) of particulate material so as to sinter a portion of the material of the layer (6) including causing the plurality of elongate elements (16) to become embedded in the sintered portion of material.

Abstract: A method and apparatus are provided for controlling a display device to generate an image for viewing by a user on a display, the image being formed by one or more light having predetermined relative timings. Received image data define one or more light components of a feature to be displayed as an element in the image. Rate data are received, e.g. from an associated tracker system, indicative of a rate of change in orientation of the display relative to a direction of gaze of an eye of the user. The received rate data are used to determine a position on the display for displaying each of the one or more light components of the feature including determining any respective adjustment required to a determined position for the light component according to the received rate data and the predetermined relative timings. The determined position of each of the one or more light components is output to the display device for display of the light component at the respective determined position.

Abstract: The invention relates to a charge container device, said charge container device having a volume suitable to substantially fill a barrel chamber, said charge container device is formed from a substantially rigid and combustible material, wherein said charge container device comprises at least one wall to define a cavity for the retention of at least one cartridge case, said at least one cartridge case comprising an energetic material, wherein said at least one cartridge case is arranged in a stacked formation within said charge container, the charge container device further comprising a base portion and a top portion, wherein the top portion comprises an aperture to allow for expulsion of energy and the base portion comprising an ignition means.

Abstract: A workstation comprising a chassis having a base frame (10) and a monitor frame assembly (11), said base frame (10) defining a work area (20) at its proximal end for accommodating a user therein, in use, wherein a desk unit (24) is mounted laterally across said work area and provides a work surface for use by a user accommodated in said work area (20), in use, said monitor frame assembly (11) comprising an outer frame, extending laterally across said base frame (10) and upwardly from its distal end, and an inner frame (32) mounted within said outer frame and configured to receive thereon a plurality of monitor brackets (45), wherein said desk unit (24) is longitudinally adjustable relative to said base frame (10) so as to selectively adjust its distance from the monitor frame assembly (11), and said inner frame (32) is vertically adjustable within, and relative to, said outer frame so as to selectively adjust its height relative to said base frame; and further wherein respective locking means are provided to

Abstract: A radar apparatus (5) for detecting multipath signal propagation when determining an elevation angle of an object, comprising an antenna array with which the radar apparatus is arranged to form at least three separate antenna beams (11, 12, 13) comprising a first antenna beam (11) having an angle of elevation above horizontal, and a separate second antenna beam (12) having an angle of elevation at or above horizontal which is less than that of the first antenna beam, and a separate third antenna beam (13) having an angle of elevation below horizontal. The apparatus is arranged to transmit radio pulses from the antenna array; to receive return radio signals within the first, second and third antenna beams; to calculate a measure of the magnitude of a return radio signal received within the third antenna beam using all of said received radio signals collectively; and, to detect multipath signal propagation using said measure.

Abstract: The present invention concerns electromechanical actuators. More particularly, but not exclusively, this invention concerns actuators operable in multiple degrees of freedom. There is provided an actuator comprising a proof-mass and at least two coils arranged such that current flowing through the coil produces a force that acts on the proof-mass, the proof-mass being mounted for movement in at least two degrees of freedom, wherein one of the at least two degrees of freedom is a translational degree of freedom.

Abstract: An optical system for a colour head up display, the optical system being for guiding image light from an image projection system to an exit pupil. First and second waveguides are utilised, each waveguide guiding a predetermined set of wavelengths.

Abstract: According to an aspect of the invention, there is provided a mortar bomb, comprising: a main body; a nose; a tail extending from the main body, away from the nose; an obturating ring groove for accommodating, in use, an obturating ring, the ring groove being located in the main body; wherein a maximum diameter of the main body is upstream of the ring groove, toward the nose.

Abstract: According to an aspect of the invention, there is provided a control system for controlling a projectile, the control system comprising: a plurality of transmitters, wherein each transmitter of the plurality of transmitters is arranged to transmit an electromagnetic wave from a transmission position; a receiver associated with the projectile, the receiver being arranged to receive a plurality of electromagnetic waves transmitted from the plurality of transmitters; a controller associated with the projectile, the controller being arranged to: determine at least one of a position, a velocity or an acceleration of the projectile from transmission positions of the plurality of transmitters and Doppler measurements derived from the received plurality of electromagnetic waves; and generate a control signal for performing an action with the projectile depending on the determined at least one of position, velocity or acceleration of the projectile.

Abstract: An emissions management module for a mission management system of a moving platform, said emissions management module being configured to: —obtain attribute data representative of (i) prevailing emissions control parameters in the form of an emissions control region defined by the relative locations of said platform and another node; and (ii) a direction of said emissions control region with respect to said platform; —generate, using said attribute data, an emissions plan that complies with restrictions defined by said emissions control parameters, and includes at least an emissions limit defining: a) a maximum transmission power permitted to be utilised by an on-board antenna or portion of aperture antenna in a specified direction relative to said moving platform; and/or b) permissible antenna waveforms and/or a specified maximum emissions duration in said specified direction relative to said moving platform; and/or c) permitted or restricted usage of on-board sensors in a specified direction relative to sai

Abstract: The present invention relates to a method of electrodepositing a metal on an electrically conductive particulate substrate. There is provided a method of electrodepositing a metal on an electrically conductive particulate substrate comprising the steps of: (i) providing a cathode; (ii) providing an anode formed from the metal to be electrodeposited; (iii) providing the substrate, cathode and anode within an electrodeposition bath comprising an electrolyte; and (iv) providing a voltage between said anode and cathode causing metal ions to flow from the anode to the cathode, wherein a separator is provided between the anode and the cathode.

Abstract: A helmet for communications comprising: a helmet member for at least partially covering the user's head; a strap for extending around the user's lower jaw and thereby securing the helmet member to the user; wherein the strap comprises a transducer unit for contacting the user's lower jaw and thereby transmitting vibrations to the user.

Abstract: A test method is provided to reproducibly test under matched HY100 welds to robustly establish the production parameters for the welding process. The test method comprises forming a ‘U’ shaped groove in a plate to which steel members are welded on the reverse side. The steel members comprise transverse members that extend across the weld. The transverse members are arranged at a density of at least four members for each 0.5 m length of weld and preferably five transverse members. The steel members further comprise longitudinal stiffeners that extend parallel to the weld. The longitudinal stiffeners are arranged at a density of two stiffeners per 0.4 m width of the plate. The high density of stiffeners has provided a reproducible and reliable weld test method that is capable of being used to establish and approve production parameters for the welding process of under matched HY100 welds.

Abstract: A carbon fiber element comprising a carbon fiber to which a coating is applied that reduces its thermal coefficient of resistivity (TCR) can be included in a fiber reinforced structural component to improve sensing of strain therein by reducing errors arising from temperature variations. A method thereof includes providing, embedded within the structural component, at least one carbon fiber extending across a principle plane of the structural component, the carbon fiber being uniformly coated along its entire length with an electrically conductive material, the coating having a resistance that is equal to the carbon fiber and a TCR that is equal but opposite to the carbon fiber. The strain in the structural component is then determined by measuring changes in the electrical resistance of the carbon fiber element.

Abstract: Disclosed is a method of forming a transmission beam with a transducer array comprising a plurality of transducers, the method comprising: receiving at least one desired property for an intended transmission beam; determining an optimised operation parameter for a transducer of the transducer array based on the received at least one desired property and an array model for modelling a relationship between at least one beam property and at least one transducer protection property whilst taking into account of an acoustic mutual coupling of the plurality of transducers of the transducer array; and generating the transmission beam using the optimised operation parameter on the transducer array.

Abstract: A method and apparatus for creating an atmospheric electromagnetic radiation path modifying element (40) operative to simulate a physical optical device, the method comprising applying electromagnetic radiation to a selected plurality of three-dimensional portions (12—FIG. 3) of an atmospheric volume (10) so as to heat and/or ionize the air within said portions, wherein said selected portions are spatially located together in a substantially unbroken three-dimensional configuration.