Abstract: A circuit for compensating for frequency modulation on a radar signal is disclosed. The disclosed circuit includes an adaptive narrow band filter in the feedback path of a phase-locked detector, such filter having a bandwidth which is narrower than the frequency range of the signal being compensated, and means for detecting the amplitude of such signal. The invention herein described was made in the course of, or under a contract or subcontract thereunder, with the Department of Defense.

Abstract: A system for performing a virtual colonoscopy includes a system for generating digital images, a storage device for storing the digital images, a digital bowel subtraction processor coupled to receive images of a colon from the storage device and for removing the contents of the colon from the image and an automated polyp detection processor coupled to receive images of a colon from the storage device and for detecting polyps in the colon image.

Abstract: An alternator system having an alternating current voltage source includes a rectifier coupled to the voltage source, a sensor coupled to the voltage source and an engine and a control circuit coupled to the voltage source, the rectifier and the sensor. The control circuit provides control signals to the rectifier and the voltage source. The alternator system further includes a fault protection controller coupled to an output of the alternator system and coupled to the control circuit. The rectifier operates such that the alternator system provides a load match which results in output power levels which are relatively high compared with output power levels of conventional alternator systems and the fault protection controller operates under fault conditions (e.g. load dump), and overrides the other controllers in the alternator system based on output voltage when a load dump occurs.

Abstract: An electronic imager includes a detector array, a plurality of processing circuits, each responsive to an output signal from a respective detector element of the array and to a determination that signal coupling in general or charge sharing in particular occurred. The imager further includes a shared channel circuit coupled to at least two processing circuits for receiving an output signal from the processing circuits in response to a determination that signal coupling has occurred and for generating an output signal in response to the received signals. The shared channel circuit further directs the output signal to an image sub-pixel, wherein a plurality of sub-pixels are associated with each radiation sensitive element.

Abstract: A patterned field emission device fabricated using conducting or semiconducting organic materials is described.

Abstract: This invention relates to a system and method for suppressing external interference in radar data provided by a plurality of sensors from a main sensor array, the data being pre-processed. The noise suppression system includes a first processing module and a second processing module. The first processing module receives the radar data and produces matched radar data while the second processing module receives the radar data and produces mis-matched radar data. The system further includes a beamformer that is in communication with the first processing module and an adaptive beamformer that is in communication with the second processing module and the beamformer. The beamformer receives the matched radar data and produces beamformed matched radar data.

Abstract: Destaging activities in a data storage system are controlled by providing a write pending list of elements, where each element is defined to store information related to a cache memory data element for which a write to storage is pending, and maintaining the write pending list so that destaging of a data element can be based on the maturity of the pending write.

Abstract: A radar detection process includes computing a derivative of an FFT output signal to detect an object within a specified detection zone. In one embodiment, a zero crossing in the second derivative of the FFT output signal indicates the presence of an object. The range of the object is determined as a function of the frequency at which the zero crossing occurs. Also described is a detection table containing indicators of the presence or absence of an object within a respective radar beam and processing cycle. At least two such indicators are combined in order to detect the presence of an object within the detection zone.

Abstract: A reconfigurable ADC includes a plurality of reconfigurable blocks for allowing the ADC to provide a plurality of architectures. In one embodiment, the ADC can be configured to operate in a pipeline mode and a sigma-delta mode. This arrangement provides an ADC having a relatively large range of bandwidth and resolution.

Abstract: A MEM relay includes an actuator, a shorting bar disposed on the actuator, a contact substrate, and a plurality of liquid metal contacts are disposed on the contact substrate such that the plurality of liquid metal contacts are placed in electrical communication when the MEM relay is in a closed state. Further, the MEM relay includes a heater disposed on said contact substrate wherein said heater is in thermal communication with the plurality of liquid metal contacts. The contact substrate can additionally include a plurality of wettable metal contacts disposed on the contact substrate wherein each of the plurality of wettable metal contacts is proximate to each of the plurality of liquid metal contacts and each of the wettable metal contacts is in electrical communication with each of the plurality of liquid metal contacts.

Abstract: A lenticular display device comprises a back panel 2 having a major surface 15 with a substantially fixed curvature. A front panel 4 is substantially in register with the back panel and is releasably pressed against and into conformity with the major surface 15 by cams 11 which apply oppositely-directed tangential forces at the edges of the front panel. An image sheet 20 and lenticular lens 21 are sandwiched between the two panels, the lens being maintained in intimate contact with substantially the entire area of the image sheet by the panels. In another embodiment the front panel is omitted and the lens itself serves as the front panel.

Abstract: A test structure for testing a thick film thermoelectric device is presented. The test structure is able to test the thermoelectric device in the device's three modes of operation, namely as a cooling device, as a heat pump, and as a power generator. The test structure includes a pair of current electrode blocks for supporting and supplying power from a power supply to the thick film thermoelectric device being tested. Thermocouples are attached to different portions of the thick film thermoelectric device to indicate the temperature change across the device as it is being tested. Additionally, a heat source is provided when the device is being tested in an electrical generation mode. The test structure is able to compensate for the expansion and contraction of the thick film thermoelectric device during the testing. By way of the disclosed test structure, the thick film thermoelectric devices can be tested and characterized.

Abstract: A radio frequency (RF) circulator includes a low temperature co-fired ceramic (LTCC) substrate and a ferrite structure disposed in the LTCC substrate. The circulator also includes first, second and third transmission lines disposed in the LTCC substrate and coupled between the ferrite disk and first, second and third ports of the circulator. The ferrite structure embedded in the LTCC substrate is exposed to an appropriate direct current (DC) magnetic field, to provide the circulator as an integrated LTCC substrate circulator.

Abstract: A method is provided for forming a self-aligned, selectively etched, double recess high electron mobility transistor. The method includes providing a semiconductor structure having a III-V substrate; a first relatively wide band gap layer, a channel layer, a second relatively wide band gap Schottky layer, an etch stop layer; a III-V third wide band gap layer on etch stop layer; and an ohmic contact layer on the third relatively wide band gap layer. A mask is provided having a gate contact aperture to expose a gate region of the ohmic contact layer. A first wet chemical etch is brought into contact with portions of the ohmic contact layer exposed by the gate contact aperture. The first wet chemical selectively removes exposed portions of the ohmic contact layer and underlying portions of the third relatively wide band gap layer. The etch stop layer inhibits the first wet chemical etch from removing portions of such etch stop layer.

Abstract: A transistor structure having an gallium arsenide (GaAs) semiconductor substrate; a lattice match layer; an indium aluminum arsenide (InAlAs) barrier layer disposed over the lattice match layer; an InyGa1-yAs lower channel layer disposed on the barrier layer, where y is the mole fraction of In content in the lower channel layer; an InxGa1-xAs upper channel layer disposed on the lower channel layer, where x is the mole fraction of In content in the upper channel layer and where x is different from y; and an InAlAs Schottky layer on the InxGa1-xAs upper channel layer. The lower channel layer has a bandgap greater that the bandgap of the upper channel layer. The lower channel layer has a bulk electron mobility lower than the bulk electron mobility of the upper channel layer where.

Abstract: When performing mirrored disk restores, including both disk level mirrored restores and file level mirrored restores, rather than first restore data to a mirror disk and later move that data to the primary disk, the data on the primary disk is first copied to the mirror disk, and thereafter, the data is restored from the backup storage device to the primary disk, independent of the mirror disk.

Abstract: A heat removal system includes a heatsink assembly having a base and a plurality of heat conducting folded fin members projecting from a first surface of the base and arranged to leave an open space on the first surface of the base. At least one thermally conductive slug projects from the center of the folded fm members and the folded fin members are thermally coupled to the slug. A gas circulating system is disposed over the slug and fin members projecting from the first surface of the base. The sidewall of a fin may be provided with at least one aperture. The top surface of the fin is closed, thereby permitting the fin to operate as a plenum of sorts. The bottom of the troughs may also be closed. The fins/troughs act as a plenum. A method of producing the folded fin heatsink member is also described.

Abstract: A method for processing pulsed-Doppler radar signals to detect a target includes transmitting radar signals from a radar system according to a predetermined frequency technique including signals having frequency diversity, receiving signals within a frequency band, including a target return signal having a frequency indicative of the velocity of the target, and transforming the target return signal using a Fourier Transform having a variable frequency scale.

Abstract: A method for transmitting fiber channel signals and non-fiber channel signals. The method includes: providing a cable having a connector at each end thereof; and transmitting both the fiber-channel signals and the non-fiber channel signals through the cable between the connectors. In one embodiment of the invention, the non-fiber channel signals are transmitted in outer region of the cable and the fiber channel signals are transmitted in a region of the cable interior to the outer region.

Abstract: This invention relates to a spectral generator and a spectral generation method for receiving pre-processed range-doppler-sensor data and generating at least one noise-reduced high-resolution spectrum therefrom. The spectral generator comprises a window generator that generates a window which defines a plurality of range-doppler cells. The spectral generator further comprises a covariance matrix calculator that is in communication with the window generator to receive the range-doppler-sensor data within the window and calculate a covariance matrix estimate for a range-doppler cell of interest in the window. The spectral generator also includes a spectral calculator that is in communication with the covariance matrix calculator to calculate a high-resolution spectral vector based on a location matrix and a noise subspace matrix estimate.