Abstract: This invention teaches two new families of Si-based Ge/SnxGe1-x heterodiode and multiple quantum well (MQW) photonic devices: (1) band-to-band photodetectors, lasers, emitters, amplifiers and modulators for the 1.5 to 12 ?m wavelength range; (2) intersubband photodetectors, lasers, emitters and modulators for 12 to 100 ?m operation. The bipolar band-to-band devices have applications within the 1.5-2.2, 3-5 and 8-to-12 ?m bands. The unipolar intersubband group has longwave infrared and terahertz applications. All strained-layer devices are grown a relaxed SnySizGe1-y-z buffer layer—a virtual substrate (VS) grown directly upon a silicon wafer by unique LT UHV-CVD. The VS provides a low-defect atomic template for subsequent heteroepitaxy and is an essential enabling technique for engineering tensile and compressive strain within the Ge/SnxGe1-x MQW by selecting the VS lattice parameter to be approx midway between the layer lattices.

Abstract: A micromechanical panel display driver is shown in which only one driver and control bus are needed for each color. Furthermore, the elements are made with uniform film thicknesses, thereby minimizing the number of steps needed to fabricate the display. Here 6 bits are provided with temporal and aperture weighting. The use of temporal weighting generally requires the activation of most pixels twice/frame, which consumes considerable power. It should also be possible to eliminate temporal weighting by redistributing the contact area into a larger number of aperture weights and by adding a row electrode. Here pixels are activated only in response to a charge in the image. This generally reduces the drive power, since many pixels in a typical image do not change from frame to frame.

Abstract: The present invention includes a method for creating a reconfigurable nanometer-scale electronic network. One embodiment of the invention is made up of the following steps. The first step entails depositing nanometer-scale electrically conducting islands on an insulating substrate. The next step entails engineering electrically conducting molecules to preferentially attach to the nanometer-scale electrically conducting islands, forming a semi-regular array of current-conducting elements. The next step entails selecting individual nodes for bond breaking by applying electrical currents through two orthogonal molecular filaments, this current heating both the molecules and islands raising the temperature of the current-conducting elements at individual nodes and breaking bonds in accordance with a pre-selected network design. The next step entails repeating the step of selecting individual nodes for bond breaking to produce thereby the nanometer-scale electronic network.

Abstract: A spin coating apparatus and method of manufacturing incorporating a perforated sheet located above the substrate in a manner to control solvent evaporation that tends to occur in the coating vessel when the chuck is rotated without introducing additional airflow complications. The distance between the substrate surface and the perforated sheet, and the number, distribution, and size of the perforations in the perforated sheet can be adjusted to optimize the uniformity of film thickness coating the substrate. The result is reduced substrate and room contamination and enhanced coating uniformity.

Abstract: The concept of a barrier coating is applicable to any structure that requires repetitive paint removal. In principle, the coating is applied between a corrosion protective primer and protective topcoat for the purpose of encapsulating the corrosion resistant properties of the primer/surface treatment and allowing for a selective removal of the topcoat using acceptable mechanical coatings removal techniques. The 5-part coating system can be used on any type of structure that requires routine maintenance or repainting to preserve the integrity and/or appearance of the structure. Benefits associated with the concept of barrier coating include a significant reduction in the costs and manpower required to remove and reapply primer and topcoat systems from air- and land-based transportation vehicles, storage buildings, bridges and miscellaneous other structural applications.

Abstract: A brain damaged patient who is improving will have a higher percentage of REM sleep than one who is not. The improvement we studied is that occurring over a period of weeks and months, so it cannot be attributed to the return of function of temporarily damaged, but not destroyed, brain tissue. Improvement was therefore to be considered as new learning or programming. Patients suffering from aphasia as the result of a discrete cerebrovascular accident or of trauma are able to enhance their improvement by increasing amounts of REM sleep inducing activities (such as having a regular sleep schedule with a systematic schedule of phase changes in circadian rhythms) and diminishing REM sleep reducers such as caffeine, noise or a use of tranquilizers.

Abstract: A technique is disclosed for identifying a missile in flight. This process comprises the steps of: rapidly sampling radiometric detection signals of a source to collect power spectral density (PSD) characteristics that include the source's continuum in PSD space and PSD frequency; and identifying the source as a missile when the continuum in PSD space decreases as PSD frequency increases.

Abstract: A single six-port device which can be used to excite antenna elements in dual polarization mode. It can replace more complex feed arrangements containing up to three separate components. One version of the six port device is made up of a network of transmission lines connected in parallel. Another six-port device implementation is a network of transmission lines connected in series. Both versions can feed antenna elements to simultaneously transmit/receive dual orthogonal linear or circular polarizations.

Abstract: A hybrid slab laser is made using a slab of active laser material, for instance Yb:YAG, capped by a nonactive material, for instance undoped YAG or sapphire. The two materials are bonded together, for instance by diffusion bonding. The composite slab is then cut and polished to serve as a laser gain module. The slab can be Brewster-cut or flat-flat and antireflection coated on the ends. Alternatively, the nonactive material can be sandwiched between two active regions. The slab is pumped from the top face like a disk laser or from the end like a longitudinally pumped slab. The slab could also be side-pumped using close coupled diodes. The preferred pumping mechanism depends on the pump source used. The slab generates or amplifies a laser beam that is longitudinally coupled into the device through the end (possibly Brewster-cut) surfaces. The laser beam bounces via total internal reflection within the slab passing one or more times through the active part(s) of the medium.

Abstract: The first phonon-pumped semiconductor laser. The active region is an unbiased boron-doped Si0.94Ge0.06/Si superlattice with Si0.97Ge0.03 buffer layers embedded in a surface-plasmon strip waveguide. Warm and cool heat sinks create a temperature gradient across the waveguide. A heat buffer layer adjacent to the cool sink reflects optical phonons and transmits acoustic phonons. Within the resonator, the difference in effective temperatures of optical and acoustic phonons provides hole pumping for the lasing transition between the heavy-hole 2 (HH2) and heavy-hole 1(HH1) minibands. A gain of 280/cm at the 5THz emission frequency is predicted for 6×1017/cm3 doping at temperatures of 300K and 77K for optical and acoustic phonons, respectively.

Abstract: Micromachined extrusions on the micrometer scale is realized using compressive stresses resulting from electromigration-induced mass transport in planarized conductors. Extrusions are formed through simple die patterns etched through a passivation layer overlaying the conductors.

Abstract: A Correlating Shack-Hartmann wavefront sensor developed for the solar adaptive optics systems. The correlation tracker as an image stabilization technique compares a real time image with a stored reference image using a fast cross-correlation calculation. Trackers of this sort are gradually coming into widespread use at solar observatories. On of their most useful features is their ability to track an extended, low contrast, temporally evolving scene.

Abstract: A dual port memory waveform generator system uses a clock-based system whose pulse durations and separations were set by counters that use the same fundamental clock frequency of the radar to be simulated. This pulse generator is loaded from a laptop computer. The output pulses are used to control pin switches to switch various frequencies, amplitudes, or phases as required for the particular radar being simulated. The result is a system with very good fidelity that will fit in a suitcase, and is very portable.

Abstract: An incandescent light, which uses a rotating, liquefied filament. The rotating filament consists of a thin layer of filament metal deposited on the interior convex surface of a refractory filament mount, which is inside the torus. The filament device is designed to rotate at a speed sufficient to prevent the metal from boiling off from, or breaking away from, the refractory surface of the filament mount as it rotates. The rotational speed of the torus will create a centrifugal force greater than the thermal forces, which would otherwise destroy the molecular integrity of the filament metal. The temperature of the deposited filament metal will exceed its normal melting point as it rotates. As it becomes hotter it will luminesce more in exponential proportion to the current applied to the rotating torus filament assembly.

Abstract: An invention pertaining to the measurement of the freezing point of substances using OCDR and OCT.technology.

Abstract: Vari ramp blankets holding X-ray file, 14? by 17? in dimensions, in pockets on top of the vari-ramp inlets on an F-15 aircraft have been used by us for the detection of foreign objects, i.e. washers, bolts, safety wire. These blankets ensure inspection consistency each and every time the aircraft is X-rayed when it is grounded after flight or is in phase. The blankets are placed on top of the F-15 vari-ramp, taped securely in place and film is placed individually in the pockets. The placement and the consistency of results that the blankets provide enhances the accuracy and duplicability of the overall X-ray process.

Abstract: A system using two algorithms for scheduling packets in a multi-hop network. The objective of the algorithms is to reduce end-to-end message (not packet) transmission delays. Both algorithms schedule packet transmissions based on the length of the original message to which the package belongs. The first algorithm is preemptive and is based on the shortest-message-first principle and the second is based on the shortest-remaining-transmit-time principle. We develop simulation models for analyzing the algorithms. The simulations show that when message sizes vary widely, these algorithms can significantly reduce average end-to-end message delays compared to the First-Come-First-Serve scheduling.

Abstract: In pursuit of developing a means for mounting a pedestal mounted CRT in a rack mounted application in a test console, it was necessary to develop a compact means of securing the CRT plastic envelope to a perforated slidable shelf in the test console. Since the vertical space was critical, it was determined that the swivel base could be discarded and replaced by a unique “Blind Capture Mounting Stud” and a “Mounting Spacer”.

Abstract: This invention automates a portion of the existing process by applying computerized comparative assessment program to the image presented on the operator's viewing screen. This is accomplished by creating a computerized image database of all known weapons, dangerous articles, and other prohibited items. At the same time the scanned container's contents data is converted to the image presented on the operator's viewing screen, the same data is computer compared to the weapons database. Just as the human mentally compares learned weapons database against what he or she sees on the monitor, the computer accomplishes the same process, except much more timely and accurately. When the computer identifies data from the scanned image that correlates to it's prohibited items database, it alerts the security operator by any number of common means and highlights the image on the security operator's monitor.

Abstract: Test and Evaluation Community Network (TECNET) is a set of software and safeguards that operates on a standard UNIX based computer to provide the following capabilities in a secure fashion via the World Wide Web operating over the Internet: Simple Mail Transfer Protocol (SMTP), Multimedia Internet Mail Extension (MIME) compliant electronic mail with many user features. Reflector configured bulletin board capabilities as a logical extension of the above electronic mail system for group sharing. Hierarchical file repositories allowing binary upload, copying, and download for Internet store and forward capability. Protected File Transfer Protocol (FTP) areas supplant the above file repository capability.