Abstract: The present invention involves the use of nanoporous carbons derived from partially or fully demetalized metal carbides in personal protection equipment for the irreversible 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 armored cab having at least an upper wall, two side walls, a front wall, a back wall, and a bottom wall. The armored cab and its respective walls include a longitudinal axis extending from the back wall to the front wall. The bottom wall includes at least one concave surface. The at least one concave surface faces downwardly and away from the armored cab, and is disposed in a direction substantially parallel with the longitudinal axis of the armored cab.

Abstract: Implementing a layered hyperbolic metamaterial in a vertical cavity surface emitting laser (VCSEL) to improve thermal conductivity and thermal dissipation thereby stabilizing optical performance. Improvement in the thermal management and power is expected by replacing the distributed Bragg reflector (DBR) mirrors in the VCSEL. The layered metamaterial structure performs the dual function of the DBR and the heat spreader at the same time.

Abstract: An image processing method includes: capturing image data from a sequence of images of a scene from different but repeatable viewpoints; associating captured images with a respective viewpoint identification; tracking a region of interest in the sequence of images; performing an eigenspace projection for the respective images to calculate respective points in the eigenspace projection; and comparing the calculated points to points previously obtained for a reference image for substantially the same viewpoints. A change between a calculated point and a corresponding previously obtained point indicates a change in the image content of the region of interest between the corresponding captured image and the corresponding reference image for a substantially same viewpoint.

Abstract: The invention relates to a method of with a projectile (1) comprising a reactive charge (4), combating an explosive-charged weapon unit (7), preferably an enemy shell, so that undesirable harmful effects on the environment are reduced, wherein the projectile (1) is configured to penetrate the surface (8) of the weapon unit (7) upon impact so that a passage (9) is opened into the explosive (10) of the weapon unit (7), through which passage (9) the reactive charge (4), under the influence of the kinetic energy of the projectile (1), is transferred to the explosive (10) of the weapon unit (7). The method can be deemed to be characterized in that the reactive charge (4), upon contact with the explosive (10) of the weapon unit (7), reacts and starts a hypergolic reaction with the explosive (10). The invention also relates to a projectile (1) for the said method.

Abstract: A method/system for estimating a state of a device and at least one target in an environment. The process involves computing a state vector using an error state form of the position of the device in a local coordinate reference frame.

Abstract: Techniques are disclosed for fabricating optical instrumentation. The techniques can be used, for instance, to populate an optical bench with several optics that can be simultaneously bonded and simultaneously verified to precise assembly, and without the use of adjustable mounts or active alignment. The techniques may be embodied, for instance, in a jig designed for operatively coupling to a given optical bench. The jig includes cut-outs that identify placement locations for the various optical components on the underlying optical bench. Thus, once the jig is secured to the optical bench, precise placement of the optical components is simplified. In some such embodiments, the jig further includes a clamping assembly for each cut-out, so that once an optical component is placed on the optical bench via that cutout, the clamping assembly can be engaged to hold that optical component in place while a deposited bonding agent is cured.

Abstract: A high linearity bandgap engineered transistor device is provided. In one example configuration, the device generally includes a substrate and an oxide layer formed on the substrate. The device further includes a wide-bandgap body material formed between a portion of the oxide layer and a gate dielectric layer. The wide-bandgap body material has an energy bandgap of 1.35 eV or higher and is lattice matched to the substrate. The device further includes a source-drain material formed on the oxide layer adjacent to the wide-bandgap body material so as to define a hetero-structure interface where the source-drain material contacts the wide-bandgap body material. The wide-bandgap body material is also lattice matched to the source-drain material. The device further includes a gate material formed over the gate dielectric layer. Other features and variations will be apparent in light of this disclosure.

Abstract: A system and method for efficiently combining multiple laser beams into a single frequency by invoking stimulated Brillouin scattering (SBS) in a dual core optical fiber is disclosed. The method and apparatus essentially becomes a brightness converter for the input laser beams. An SRS seed is generated in a long length of fiber or by a diode and is launched into the back-end of the SBS combining optical fiber. Various single-frequency pump beams are launched into the front-end of the same fiber. The seed acts to lower a threshold for SBS in the fiber, thus invoking the nonlinearity. Provided the various pump beams are close in frequency and seed/pump modes overlap, each acts to amplify the seed through the nonlinear SBS process, providing an output signal which is brighter than the combined pump beams.

Abstract: A method for fabricating infrared sensors is disclosed. a chalcogenide layer is initially deposited on a substrate. A group of vias is then formed within the chalcogenide layer. After the vias have been converted to a group of studs, a vanadium oxide layer is deposited on the chalcogenide layer covering the studs. Next, the vanadium oxide layer is separated into multiple vanadium oxide membranes. After the chalcogenide layer has been removed, each of the vanadium oxide membranes is allowed to be freestanding while only supported by a corresponding one of the studs. The vanadium oxide membranes will be used as infrared sensors.

Abstract: There is provided a sensor for use generally within the signal processing unit of a radar system. The sensor enables entity returns to be classified according to the velocity of the entity and thus allows returns to be processed according to classification. In particular, the sensor comprises a first processing means that filters an input signal using a narrow-band notch filter to output a wideband output. In particular, the sensor comprises a second processing means that filters an input signal using a wide-band notch filter to output a narrowband output. The invention provides for the comparison of the outputs to determine how the entity return is to be classified.

Abstract: An entry slit panel for a push-broom hyperspectral camera is formed at least partly from a silicon wafer on which at least one companion sensor is fabricated, whereby the companion sensor is co-planar with the slit and detects light imaged on the panel but not on the slit. In embodiments, the companion sensor is a panchromatic sensor or a sensor that detects light outside the wavelength range of the camera. At least a region of the wafer is back-thinned to a thickness appropriate for a diffraction slit. The slit can be etched or laser cut through the thinned region, or formed between the wafer and another wafer or a conventional blade. The wafer can be back-coated or metalized to ensure its opacity across the camera's wavelength range. The companion sensor can be located relative to the slit to detect scene features immediately before or after the hyperspectral camera.

Abstract: An optical waveguide is provided having at least first and second diffraction regions, the first diffraction region being arranged to diffract image-bearing light propagating along the waveguide so as to expand it in a first dimension and to turn the image-bearing light towards the second diffraction region, the second diffraction region being arranged to diffract the image-bearing light so as to expand it in a second dimension and to release it from the waveguide as a visible image. The first diffraction region is formed by first diffraction grating embedded within the waveguide, arranged to present a substantially similar profile to the image-bearing light when incident upon the grating from a given angle above or below the grating such that the polarisation of the image bearing light is rotated by substantially similar amounts, but in opposite directions, by successive interactions with the first diffraction region.

Abstract: A dispensing and accountability system for assuring washing of a person's hands includes at least one passive infrared detector adapted to detect the presence of the person having a requirement of washing the hands. Further, the dispensing and accountability system includes a controller having a scalable processor architecture operatively coupled to each passive infrared detector of the at least one passive infrared detector. Furthermore, the dispensing and accountability system includes at least one audio signal unit operatively coupled to the controller. The at least one audio signal unit is adapted to generate an audio signal to remind the person to wash the hands. In addition, the dispensing and accountability system includes at least one dispensing unit operatively coupled to the controller. Because of the scalable processor architecture of the controller, the system may be expanded or contracted depending on the needs of the institution using it.

Abstract: A system and method for improving the prompt dose radiation response of mixed-signal integrated circuits is disclosed. An internal analog circuit inside a mixed-signal integrated circuit generates an internal analog reference voltage that has been used for various purposes in the integrated circuit. At least one external capacitor is added either internal or external to a device package of the integrated circuit. The external capacitor reduces any change in the internal reference voltage due to prompt dose radiation by stabilizing the internal reference voltage and thus improves prompt dose radiation response of mixed-signal integrated circuits. A much greater value of capacitance may be provided without increase in dielectric rupture suceptability or decrease in manufacturing yield which may be associated with added on-chip capacitance. This increased capacitance primarily reduce the amount of disturbance caused to the internal node during a prompt dose radiation event.

Abstract: A multi-band whip antenna having a 30 MHz to 2 GHz bandwidth and an L-band dipole has its coverage extended up to 6 GHz by eliminating nulls and reducing VSWR problems that are cured through the utilization of a sleeve over the feedpoint of the L-band antenna. Chokes in the form of sleeves are provided at either end of the L-band dipole to shorten the L-band antenna for preventing reverse polarity currents at the L-band antenna feedpoint, with the antenna further including the use of double shielded meanderlines to provide improved performance between 410-512 MHz and in which a capacitance sleeve is added at the bottom of the L-band antenna to effectively elongate the antenna below the L-band to permit operation below 700 MHz.

Abstract: A method of spectral-spatial-temporal image detection is disclosed. In one embodiment, a spectrally differenced image is obtained by computing a difference of at least two intensity values in at least two spectral bands of an image. Further, a spatially filtered spectral image is obtained by applying a spatial median filter to the obtained spectrally differenced image. Furthermore, a temporal image is obtained by determining a temporal pixel value difference using a computed predictive frame difference. In addition, a spectral-spatial-temporal filtered image for detection is obtained by using the obtained spatially filtered spectral image and the temporal image.

Abstract: A camera adapted for taking pictures of a moving scene is disclosed. The camera includes an imaging array, a plurality of charge-coupled device (CCD) shift registers, and a controller. The imaging array includes a plurality of CMOS pixel sensors organized as a plurality of columns and rows. The image moves in the column direction. One CCD shift register corresponds to each of the columns. Each CMOS pixel sensor includes a first transfer gate that transfers charge accumulated in the pixel sensor to a corresponding cell in the CCD shift register. The controller controls the CCD shift registers such that charge stored in a first cell in a CCD shift register is moved to a second cell in the CCD shift register where the charge is combined with charge accumulated by the pixel sensor that is connected to the second cell, the combined charge being generated from the same image pixel.

Abstract: A wide field optically athermalized orthoscopic lens system includes, in order from object to image, a first lens having a negative power, a second lens having a positive power, a third lens group having a positive power, a fourth lens having a positive power and a fifth lens having a negative power. The third lens group includes two lenses having, in order, a first lens with positive power and a second lens with negative power. The powers, shapes, Abbe dispersion values and temperature coefficients of refractive indices of the lenses are selected such that the lens system is athermalized, orthoscopic and achromatized over a wide (e.g. >140° C.) temperature range.

Abstract: Techniques are disclosed that provide time delay integration (TDI) in detection signal processing (such as a signal generated by an IR sensor). The techniques can be implemented, for example, to provide blanking and/or TDI functionality at the readout integrated circuit (ROIC) level for active focal plane array (FPA) elements or other transducer elements. In one example embodiment, an integrator circuit is configured with one or more switches for allowing integration of multiple input signal events such that reset of the integration is controlled independently and can be reset equal to or less often than the number of single events, thereby allowing one or more detected events to be integrated together within a frame interval.