Abstract: A head-mounted or helmet-mounted display apparatus is provided. The apparatus includes an optical element which in use is disposed in front of the eyes of a user. The optical element has a waveguide portion. The apparatus further includes a light source of image-bearing light and two diffraction elements. Each diffraction element is configured for propagation of image-bearing light of the light source through the optical element. Each diffraction element is arranged to release the image bearing light from the optical element. The apparatus further includes a switching element for switching the image-bearing light repeatedly between the first diffraction element and the second diffraction element to provide a first visible image or a second visible image to the respective eye of a user.

Abstract: The present invention relates to an articulated tracked vehicle comprising a front and a rear vehicle unit connected by means of a rigid load-carrying frame. The load-carrying frame is pivotally attached to the front vehicle unit about a substantially vertical front steering link and pivotally attached to the rear vehicle unit about a substantially vertical rear steering link. The vehicle further comprises control means arranged to steer the front vehicle unit relative to the load-carrying frame about the front vertical steering link and to steer the rear vehicle unit relative to the load-carrying frame about the rear vertical steering link, wherein the control means is arranged such that the front and rear vehicle units are individually steerable relative to the load-carrying frame about their respective vertical steering links.

Abstract: The system and method for reducing Yb to Er bottlenecking in a single frequency Er:Yb-doped fiber laser amplifier. The system is pumped off peak at about 935-955 nm. The off-peak pumping reduces bottlenecking and increases the optical and slope efficiency of the system by about 10% as compared to an EYDFA system pumped on-peak.

Abstract: Systems and methods provide adaptability in a mobile ad hoc network (MANET), based on an existing protocol, such as adaptive hybrid domain routing (AHDR). The systems and methods are especially suited for fast changing topologies that may change after a reactive route discovery has been completed.

Abstract: The invention relates to a steering device for an articulated tracked vehicle comprising a front and a rear vehicle unit, wherein said steering device comprises a substantially vertical steering link about whose axis said front and rear vehicle units are pivotable. The vertical steering link is arranged substantially centrally of the front vehicle unit, and the steering device comprises a steering bearing configuration comprising an outer bearing ring arranged to be attached to a centre bean of said front vehicle unit, and an inner bearing ring rotatbly arranged relative to said outer bearing ring via a bearing about the axis of the steering link.

Abstract: A method and apparatus for power through a network (1), the network (1) comprising consumer units (C1-C4) and provider units (P1-P6), the method comprising: performing one or more times a first process, the first process being a process of performing step (a) followed by step (b); wherein step (a) comprises selecting a previously unselected consumer unit (C1-C4), thereby providing a currently selected consumer unit; step (b) comprises performing one or more times a second process, the second process being a process of performing (c) followed by step (d); step (c) comprises selecting a previously unselected provider unit (P1-P6), thereby providing a currently selected provider unit, the currently selected provider unit being connected in the network (1) to the currently selected consumer unit; and step (d) comprises, from the currently selected provider unit to the currently selected consumer unit, delivering an amount of resource.

Abstract: A laser system includes first and second mirrors, a semiconductor laser and a high frequency pulse generator. The semiconductor laser generates optical power within an optical cavity and reflects the optical power between the first mirror and second mirrors. The optical power has a frequency of foriginal-laser. The high frequency pulse generator generates a high frequency pulse with a rise time greater than an optical cycle of the optical power within the optical cavity and directly impinges the high frequency pulse on the optical power within the optical cavity. Impinging the high frequency pulse on the optical power within the optical cavity causes a frequency shift of the optical power to generate a final laser frequency that is greater than foriginal-laser as well as beyond a frequency band of the second mirror to cause a final laser to be emitted past the second mirror and from the semiconductor laser.

Abstract: An optical apparatus to provide several light bands on a single coaligned beam line or axis. The apparatus generally comprises five main components: a pump, a fold mirror, an input coupler, a nonlinear optical (NLO) crystal, and an output coupler. Alternatively, the present invention may comprise four main components, namely, a pump, an acute porro prism, a NLO crystal, and an input-output coupler. The pump input beam makes two passes through the nonlinear optical crystal and generates two new colors, having different wavelengths, during each pass through the nonlinear optical crystal.

Abstract: The disclosure relates to a method for controlling the powertrain of a vehicle, which powertrain comprises a first electric drive device for driving of a first drive shaft and a second electric drive device for driving of a second drive shaft of the vehicle, comprising the step of via power electronics providing electricity supply of a first electric motor of the first electric drive device and a second electric motor of the second electric drive device, comprising the step of providing said electricity supply from a common power electronics which supplies said first and second electric motors with electricity, which motors hereby are connected in parallel. The disclosure also relates to a system for controlling the powertrain of a vehicle. The present invention also relates to a motor vehicle. The present invention also relates to a computer program and a computer program product.

Abstract: A projectile having a fin deployment system disposed about its circumference. The fins are initially contained by a fin cover that is removed by aerodynamic force. The fins are then rotated around a rotational axis parallel to and offset from the central axial axis of the projectile body by the centrifugal forces created by the rotation of the projectile as the projectile passes through a barrel of a gun system or tube launcher. The fin deployment system can also have locking systems that lock the fins in the deployed position and prevent the fins from rotating back into the retracted position after deployment.

Abstract: A mobile infrastructure assisted ad-hoc network increases the number of nodes capable of being serviced by the network by selectively choosing those protocols for selected nodes which minimize overhead with the freed up bandwidth permitting an increase in the overall number of nodes serviceable by the ad-hoc network to as many as 1,000 nodes. In one embodiment node dynamicity is determining factor as to what protocol will be used.

Abstract: A guiding assembly is adapted to be connected to a projectile and comprising a rear main unit adapted to be connected to the front end of the projectile, and a front main unit rotatably connected at its rear end to the front end of the rear main unit. The front main unit is adapted to rotate about a central longitudinal axis. A relative speed control unit is operable between the rear main unit and the front main unit and capable of providing spin braking force to slow the relative speed of rotation of the front main unit. An at least one guiding fin radially extends from the front main unit. The pitch angle of the fin is controllable by a return spring connected to the fin so that the pitch angle of the fin is growing as the aerodynamic pressure on the fin lowers and it is growing smaller as the aerodynamic pressure on the fin gets bigger.

Abstract: A system and method for detecting at least one compound in a material under test (MUT) is presented. The system includes a Nuclear Quadrupole Resonance (NQR) frequency generator that generates an NQR frequency (fNQR) and propagates the fNQR frequency toward the MUT. A microwave frequency generator generates a microwave frequency (fmw) and propagates the fmw frequency toward the MUT. A RF output probe detects radio frequency (RF) emissions returned from the MUT. A detector detects the at least one compound based, at least in part, on whether the RF emissions returned from the MUT include any frequencies corresponding to fmw+/?(n×fNQR), where n is an integer of 2 or greater. In the preferred embodiment, n=2.

Abstract: A hybrid imaging array and method for using the same is disclosed. The image array includes a low-light imaging array and a color imaging array. The two imaging arrays can be utilized separately or in conjunction with one another. The low-light imaging array is optimized for night vision or situations in which the light levels are too low to allow a conventional color image to be formed by the color imaging array. The color imaging array is optimized for daylight or color photography. The low-light imaging array can be utilized in conjunction with the color imaging array to provide a color image with reduced noise.

Abstract: The following invention relates to an optical device for use in a system that requires optical zoom or focus abilities, particularly for providing pre-set zoom parameters with a very low energy requirement. There is provided an optical magnification device comprising at least one pair of optically aligned deformable reflectors, wherein each reflector pair has at least two configurations, wherein selection of a first and a second configuration of said deformable reflector pairs provides pre-defined magnification states, such that in any configuration one reflector is substantially concave and the other is substantially convex; at least one controller may cause both the reflectors to move between said at least two configurations.

Abstract: The present invention involves the use of nanoporous carbons derived from partially or fully demetalized metal carbides in personal protection equipment for the reversible absorption/adsorption of both broad and specific targeted gases. These materials have been specifically processed to provide enhanced effective loadings against specific harmful volatile organic compounds.

Abstract: An assembly process for assembling at least part of an aircraft airframe, the assembly process comprising: providing a first assembly including a first part of the airframe and a first reference structure attached thereto; providing a second assembly including a second part of the aircraft airframe and a second reference structure attached thereto; receiving, by a first receptacle, the first reference structure; receiving, by a second receptacle, the second reference structure; moving, by an actuation device, the receptacles into a predetermined configuration, thereby moving the first part of the aircraft airframe and the second part of the aircraft airframe into a predetermined configuration; and performing an assembly operation on the airframe parts to fixedly attach together the first part of the aircraft airframe and the second part of the aircraft airframe, thereby producing the part of the aircraft airframe.

Abstract: A method of tracking an entity by monitoring a signal, the signal tending to vary spatially and be generally time-invariant, the entity moving from a first location within an area to a second location within the area, the method being suitable for use when the location of the source of the signal is unknown, the method comprising providing a plurality of particles for use with a particle filter, each particle being associated with a first particle location, a first particle location being an estimate of the first location of the entity, providing an estimate of the motion of the entity between the first location and the second location, using the estimate of the motion and using the particle filter, for each particle, updating the first particle location for that particle thereby producing an updated particle location, the updated particle location being an estimate of the second location of the entity, for each updated particle, estimating at least one expected signal parameter at the updated particle locati

Abstract: A camera array and method are disclosed for capturing and processing images of an area of terrain. For each of a plurality of time-steps within a time period, using each of a plurality of cameras in a camera array, an exemplary method includes: generating an image of a respective portion of terrain, wherein the cameras in the camera array have substantially fixed positions relative to each other, and the portions of terrain are such that the whole of the area of terrain has been imaged by the end of the time period; selecting a subset of the images such that the whole of the terrain is covered by the portions of the terrain in the images in the subset; and for an image not in the subset, if an object of interest is in that image, extracting a sub-image containing the object from that image.

Abstract: According to an embodiment, an improved flying adder circuit, comprises a fine clock, a coarse pulse clock, a rising edge triggered output connected to both the fine clock and the coarse pulse clock, a pulse clock connected to the rising edge triggered output, an adder, a 12-bit register situated to receive a signal from the adder and the pulse clock, and a single bit register situated to receive a signal from the pulse clock.