Abstract: Exemplary embodiments are related to generating an error correction voltage and/or a compensation voltage based upon pulse-width modulation information. A device may include a pulse-width modulator configured to receive a first input voltage and convey a modulated output voltage. The device may also include a filtering unit including at least one filter configured to receive the modulated output voltage, generate at least one of an error correction voltage and a compensation voltage, and convey a second input voltage to the pulse-width modulator based on at least one of the error correction voltage and a compensation voltage.

Abstract: Exemplary embodiments are related to a switching voltage regulator. A switching voltage regulator may include a current limit detector configured to detect an over-current condition. The switching voltage regulator may further include a pulse-width modulation (PWM) module coupled to the current limit detector and configured to convey a PWM signal based on a programmed switching frequency and an output voltage and in response to the over-current condition.

Abstract: Acoustic heterodyne radars use accurately surveyed or otherwise known locations to repetitively launch at least two, intense acoustic tone soundwaves (F1, F2) into an underground area of search. An acoustic receiver is tuned to receive either the sum (F1+F2) or difference (|F1?F2|) heterodynes and is configured to measure and log the overall relative attenuation and roundtrip travel times of the soundwaves, like a typical radar. Any acoustic heterodynes received are assumed to be the work of non-linearities and stresses in the search area. A full-waveform three dimensional tomography algorithm is applied by a graphics processor to the collected and logged data to generate maps and profiles of objects beneath the ground which are interpreted to have produced the acoustic heterodynes.

Abstract: A system and method that allow inspection of hollow structures made of composite material, such as an integrally stiffened wing box of an aircraft. A wing box comprises top and bottom skins connected by a plurality of spaced spars. The system employs a plurality of scanners for inspecting different portions of each spar. The system uses dynamically controlled magnetic coupling to connect an external drive tractor to computer-controlled scanners that carry respective sensors, e.g., linear ultrasonic transducer arrays. A system operator can control the various components by means of a graphical user interface comprising multiple interaction regions that represent the individual scanner motion paths and are associated with respective motion script files.

Abstract: System and method for enabling ultrasonic inspection of a variable and irregular shape. The system comprises one or more ultrasonic pulser/receivers, one or more ultrasonic transducer arrays, a shoe or jig to hold and position the array(s), data acquisition software to drive the array(s), and data analysis software to select a respective best return signal for each pixel to be displayed. This system starts with information about the general orientation of the array relative to the part and a general predicted part shape. More specific orientation of the transmitted ultrasound beams relative to the part surface is done electronically by phasing the elements in the array(s) to cover the expected (i.e., predicted) surface as well as the full range of part surface variability.

Abstract: An unsynchronized acoustic or radio-frequency (RF) computed tomography (CT) imaging system with matched, but independent, continuous wave (CW) transmitters and receivers configured to radiate acoustic or RF transmissions in a plurality of vector paths through solid geologic material. A computer calculates and displays tomographic images constructed from individual acoustic or RF path signal travel time or attenuation measurements logged from registered locations from the CW transmitters and receivers after their being shuttled amongst a number of different transmitter and receiver perspectives available around said geologic material to generate data necessary for computed tomography. Each of the transmitters and receivers include independent unsynchronized crystal oscillators rated at 10-ppm or better frequency uncertainty to produce and to detect CW radio frequency (RF) transmissions.

Abstract: Hydroxylated nebivolol metabolites increase NO release from human endothelial cell preparations in a concentration dependent fashion following acute administration. In addition, hydroxylated nebivolol metabolites, including but not limited to 4-hydroxy-6,6?difluoro-, 4-hydroxy-5-phenol-6,6?difluoro-, and 4-hydroxy-8-pheno-6,6?difluoro-, have the ability to increase the capacity for NO release in human endothelial cells following chronic administration. This invention provides hydroxylated nebivolol metabolites and compositions comprising nebivolol and/or at least one hydroxylated metabolite of nebivolol and/or at least one additional compound used to treat cardiovascular diseases or a pharmaceutically acceptable salt thereof.

Abstract: An analog control circuit is coupled to an apparatus having a variable characteristic over an operating range. A sensing circuit is coupled to the apparatus and the control circuit during the range of operation of the apparatus and is operative to sense the variable characteristic. The operating parameter of the apparatus is controlled to be set at a level corresponding to a prescribed criterion, which may be a maximum or minimum, of the characteristic sensed over the range of operation.

Abstract: Thermoplastic wet insulation field joints for pipelines in bodies of water utilize the fast gelling nature of thermosetting systems, or other suitable fillers, coupled with a fully fused thermoplastic outer sheath for protecting the pipe joint from water contact. The outer sheath is fully fused circumferentially to the parent coating at each end of the field joint, and an outer closure patch is then fused to the sheath over the joining area and/or injection ports. This totally seals the filler material from direct contact with water, preventing water ingress from reaching the pipe surface. Hydrolysis of the infill material is thus also prevented. By use of a fast setting or solid infill material the system gains sufficient strength almost immediately to withstand the rigors of handling during the lay operation.

Abstract: This invention provides glucuronidated nebivolol metabolites and pharmaceutical compositions of glucuronidated nebivolol metabolites for treatment of cardiovascular diseases. In addition, this invention also provides compositions comprising nebivolol and/or at least one glucuronidated metabolite of nebivolol and/or at least one other active compound in a pharmaceutically acceptable carrier. This invention also provides methods of treating and/or preventing vascular diseases, by administering at least one glucuronidated metabolite of nebivolol that is capable of releasing a therapeutically effective amount of nitric oxide to a targeted site affected by the vascular disease. Also, this invention is directed to the treatment and/or prevention of migraine headaches administering at least one glucuronidated metabolite of nebivolol. This invention may also be used in conjunction with or as a single treatment of metabolic syndrome disorders.

Abstract: Hydroxylated nebivolol metabolites increase NO release from human endothelial cell preparations in a concentration dependent fashion following acute administration. In addition, hydroxylated nebivolol metabolites, including but not limited to 4-hydroxy-6,6?difluoro-, 4-hydroxy-5-phenol-6,6?difluoro-, and 4-hydroxy-8-pheno-6,6?difluoro-, have the ability to increase the capacity for NO release in human endothelial cells following chronic administration. This invention provides hydroxylated nebivolol metabolites and compositions comprising nebivolol and/or at least one hydroxylated metabolite of nebivolol and/or at least one additional compound used to treat cardiovascular diseases or a pharmaceutically acceptable salt thereof.

Abstract: An analog control circuit is coupled to an apparatus having a variable characteristic over an operating range. A sensing circuit is coupled to the apparatus and the control circuit during the range of operation of the apparatus and is operative to sense the variable characteristic. The operating parameter of the apparatus is controlled to be set at a level corresponding to a prescribed criterion, which may be a maximum or minimum, of the characteristic sensed over the range of operation.

Abstract: Polyester yarns whose polyester fibers are of simple oval peripheral cross-section of aspect ratio at least about 1.85:1 have shown better dye yield in fabrics than polyester staple fibers having lower aspect ratios. Such superior cross-sections for polyester staple fibers have also provided advantages in open-end spinning in providing yarns with fewer spinning failures than fibers of conventional round cross-section.

Abstract: Polyester staple fibers of simple oval peripheral cross-section of aspect ratio at least about 1.85:1 provide advantages both in open-end spinning (to provide yarns with fewer spinning failures than such fibers of conventional round cross-section) and better dye yield in fabrics than polyester staple fibers having other oval cross-sections, especially those having lower aspect ratios.

Abstract: An advanced windows management system permits a user to customize views from a plurality of frame windows into a single target window. A view includes display information that corresponds to an underlying program. The user selects views from the frame windows, and the user specifies a target window for placement of the views, including the arrangement of the views, in the target window via a drag and drop operation. In response, the advanced windows management system docks and displays the selected views in the target window. The views may comprise textual, graphical and control information for a plurality of editors or tools used in software development. Through use of the advanced windows management system, a user generates editor windows that include views from tools and editors. Thus, the user is permitted to customize the editor window to include views for editors used on a project.

Abstract: A system is provided for the relief of excess pressure from the hot leg of a nuclear reactor to the cold leg on the occurrence of a loss of coolant accident. This system includes a conduit connecting the hot leg with the cold leg. The conduit further includes a check valve which is operated on the basis of differential pressure so that during normal operation the valve is closed.

Abstract: Draw-false-twist texturable polyester yarns are provided which have filaments having 6-10 essentially symmetric lobes of equal length equispaced around the central axis of the filament, a modification ratio of from 1.17 to 1.85 and a denier per filament between 3.8 R.sub.o and a maximum value which is a function of the modification ratio, the number of lobes and the factor R.sub.o which is a nominal draw ratio. Less than 12% of the draw-false-twist textured filaments have flattened cross-sectional peripheries greater than 10 microns in length.