Abstract: Systems and methods for securing seats and other components to a seat track that may be implemented to provide flush symmetric and asymmetric seat track fitting assemblies that accommodate variances in the height of seat track extrusions. A component may be secured to mate directly with a seat track fitting surface and uppermost surface (flange) of a seat track, and with a fitting securing component (retainer or capture component) that provides additional load path in the lateral shear plane (X axis) while optimizing length of thread engagement of the component fastener.

Abstract: An emergency locating system can include emergency transceivers and locator transceivers. The emergency transceivers can be capable of transmission of spread-spectrum encoded messages, and can be actuated by a user to send a distress message. A locator transceiver can be capable of receiving the distress messages and performing two-way ranging to determine a distance between the locator transceiver and the emergency transceiver.

Abstract: Read-out cell systems are disclosed for image detectors, including infrared image detectors, that provide improved sensitivity by providing in-cell subtraction through the use of a voltage ramp signal generated using a reference pixel and a feedback amplifier. The ramp voltage is generated using a reference pixel and an amplifier having feedback. The ramp voltage is then provided to a plurality of read-out cells. The ramp voltage can be coupled to an input transistor to provide current subtraction prior to the integration node. The ramp voltage can also be provided to integration capacitors within the read-out cells to provide current subtraction directly to the integration node. Further, a temperature-independent fixed current source can also be utilized to further control current subtraction.

Abstract: Fissionable materials are distinguished from other high-effective atomic number materials by producing dual-energy x-ray radiation sufficient to cause fission in fissionable materials and directing the dual-energy x-ray radiation sufficient to cause fission in fissionable materials towards a physical region. X-ray radiation and a product of fission from the physical region are sensed. An absorption of the dual-energy x-ray radiation by the physical region is determined based on the sensed x-ray radiation, and whether the physical region includes fissionable material is determined based on the presence of a product of fission.

Abstract: An integrated mine detection system includes a ground penetrating metal detector and a ground penetrating radar detector. The integrated mine detection system includes an integrated search device housing a radio-wave transmitter of the radar detector and a coil of the metal detector. The radio-wave transmitter includes an antenna. The integrated search device includes a radio-wave receiver in the form of a pair of receiving antennas.

Abstract: Decreased capability for detection of communications signals by an adversary is provided by applying frequency hopping, frequency chirping, and direct sequence spreading to the signals. The frequency hopping and frequency chirping can be driven by pseudo random functions. The direct sequence spreading can use a pseudo random chip sequence.

Abstract: A transportable directional antenna system includes an antenna pedestal, a plurality of outriggers, and an earth anchor. The earth anchor can be coupled to a horizontally centered point on the pedestal. Tension can be applied between the earth anchor and the pedestal to substantially preload the outriggers and the surface on which they bear to provide a highly stable antenna.

Abstract: A surveillance system is disclosed. In some embodiments, the surveillance system may include at least one controller adapted to control operation of first and second screening apparatus and to produce image data and screening data, to relate the image data to the screening data, and to produce relational information data from the related image data and screening data. In some embodiments, the system may include a first screening apparatus adapted to screen a subject in a subject position, a second screening apparatus adapted to screen the subject in the subject position, and a controller adapted to produce first and second screening data from the first and second screening apparatus, respectively, relate the first and second screening data, and to produce relational information data from the related first and second screening data.

Abstract: Processing image information includes receiving light having image information. A first optical transform is performed on the light to yield a first optically transformed light, and a second optical transform is performed on the light to yield a second optically transformed light. A first metric is generated in accordance with the first optically transformed light, and a second metric is generated in accordance with the second optically transformed light. The first metric and the second metric are processed to yield a processed metric. An inverse optical transform is performed on the processed metric to process the image information of the light.

Abstract: A flight recorder includes an enclosure having a notch formed on one side or corner of the enclosure. An electronic interface is disposed within the enclosure. The electronic interface is coupled for receiving flight data, video data, and audio data. A memory unit is disposed within the enclosure and electrically connected to the electronic interface for storing the data. The memory unit contains a non-volatile memory device. A reserve power supply is physically disposed within the notch of the enclosure. The reserve power supply contains a rechargeable battery. A clamp secures the reserve power supply to the enclosure to make the reserve power supply removable from the enclosure. The reserve power supply has an electrical connector coupled to the enclosure for providing an operating voltage to the electronic interface and memory unit. The reserve power supply and electrical connector physically reside within a form factor of the enclosure.

Abstract: Effective atomic numbers associated with pixels in a region are received. An effective atomic number is associated with each pixel in the region. X-ray data for the region is received, and an item within the region is identified from the x-ray data. Some of the pixels in the region are correlated with the item such that the item is associated with an effective atomic number. An image of the region is rendered. The pixels of the item have a display style based on the effective atomic number of the item.

Abstract: In one aspect, an x-ray scanning device is provided. The x-ray scanning device comprises a target adapted to convert electron-beam (e-beam) energy into x-ray energy, a detector array positioned to detect at least some x-rays emitted from the target, and a conveyer mechanism adapted to convey items to be inspected through an inspection region formed by the target and the detector array, wherein the target and the detector array are rotated out of alignment with each other such that x-rays emitted from the target impinge on diametrically positioned detectors of the detector array without passing through near-side detectors of the detector array.

Abstract: Systems and methods for color correcting radiation by alternately focusing a first radiation spectrum on a first radiation spectrum detector, and then focusing at least one additional radiation spectrum on at least one additional radiation spectrum detector.

Abstract: A wireless communication system can include polarization agile antennas to enable adaptation to the polarization characteristics of a changing propagation channel. In one embodiment, a mobile terminal can include one or more polarization-agile antennas, and can select polarization orientations that are preferentially propagated through the changing propagation channel. In another embodiment, a mobile terminal having two polarization-agile antennas can provide spatial diversity, polarization diversity, or combinations of both. Multiple-input multiple-output (MIMO) systems can include polarization-agile antennas to allow for switching between spatial and polarization diversity, combined spatial and polarization diversity, and various Eigen channel decompositions using spatial, polarization, and combined spatial and polarization dimensions. An extended polar normalization provides enhanced fidelity for methods of communications system modeling.

Abstract: Ultra-wideband frequency hopping spread spectrum (UWB-FHSS) solutions are used for transceiver architectures. These UWB-FHSS transceiver architectures can transmit and accurately digitize frequency hops over an extremely wide bandwidth while using a relatively slow analog-to-digital converter (ADC) without suffering from unacceptable performance degradation. For example, ADCs can be used having sample rates lower than standard Nyquist criteria would require for the bandwidth of the spread spectrum utilized.

Abstract: Techniques for detecting wireless devices that are signaling in high proximity to a convoy or other operation and preventing messages from reaching the wireless devices. One class of the techniques uses surgical jamming methodologies that minimize power consumption and collateral interference, while being maximally inconspicuous; another class uses baiting beacons to prevent the messages from reaching the wireless devices. Still another class of techniques denies wireless devices access to a wireless network. An exemplary embodiment applies the techniques to wireless devices and beacons in a GSM network.

Abstract: A high voltage propellant isolator includes at least two different types of isolator rings or segments, in alternating lateral arrangement, that direct the flow of propellant, such as xenon gas, in a tortuous path through the isolator.

Abstract: Concentrating particles in a turbulent gas flow may include receiving, in a receptacle, a turbulent gas flow that includes particles. The concentration of particles in a gas flow exiting the receptacle at a first port is increased as compared with a concentration of the particles in the gas flow received by the receptacle. The increased concentration of particles is accomplished by removing a portion of the gas flow by using a second port, and fluidly communicating the gas flow through a tube in the receptacle. The tube has a smaller diameter at the end of the tube at which the gas flow exits the tube than diameter at the end of the tube at which the gas flow is received.

Abstract: A particle-harvesting material includes a flexible, reusable, and thermally conductive material including a rough surface having dimples of a size within a first range of sizes, a microstructure including interstices of a second range of sizes, the second range of sizes including sizes smaller than the first range of sizes, and an etched portion on the rough surface configured to attract particles upon contact between the particles and the etched portion.

Abstract: An explosive detection system includes an unmanned vehicle and a manned vehicle. The unmanned vehicle includes a reflector. The manned vehicle includes a ground penetrating radar. The manned vehicle also includes electronics configured to process radar signals that are reflected by the reflector to detect an explosive device. The manned vehicle follows the unmanned vehicle.