Abstract: An apparatus for high-power combining includes multiple power-combining building blocks, a passive input network to couple one or more input signals to one or more input ports of the multiple power-combining building blocks, and a passive output network to couple to output ports of the multiple power-combining building blocks and to generate one or more amplified output signals. Each power-combining building block includes M high-power amplifiers (HPAs) coupled in parallel to a respective passive input network and a respective passive output network. A count of the multiple power-combining building blocks is determined based on a desired total number N of the HPAs and a number M of the HPAs in each power-combining building block.

Abstract: A disclosed method for simulation visualization may include determining initial conditions for a control logic component for modeling and simulating of a physical product or process. The method may also include determining initial conditions for a render engine for generating a visualization of outputs of the control logic component. The method may include initiating execution of the control logic component and the render engine in accordance with the determined initial conditions, and receiving, during a simulation, input from the control logic component in accordance with a predefined interface for simulation visualization. The received input may represent one or more outputs of the control logic component. The method may also include communicating the received input to the render engine in accordance with the predefined interface for visualization by the render engine.

Abstract: In one embodiment, a system includes a cathode and a thermionic emitter installed at least partially within the cathode tube of the cathode. The thermionic emitter is in a shape of a hollow cylinder. The hollow cylinder includes an outer surface and an unsmooth inner surface. The outer surface is configured to contact an inner surface of the cathode tube. The unsmooth inner surface includes a plurality of structures that provide an increase in surface area over a smooth surface.

Abstract: A shock strut includes a first piston having a first hollow interior and a second piston having a second hollow interior. The first piston is movably mounted to the second piston. The shock strut additionally includes a housing having a third hollow interior, and the second piston is movably mounted to the housing. In response to application of a force to the shock strut, the first piston is receivable within the second piston during a first stage of compression and together, the first piston and the second piston are receivable within the housing during a second stage of compression.

Abstract: A maxillofacial orthognathic fixation implant assembly and its method of production and use, the implant being an assembly of an upper anchor implant member, a lower anchor implant member and at least one bridging implant member, the anchor implant members being adapted to be securely mounted to a maxilla and the at least one bridging implant member being adapted to connect the upper anchor implant member to the lower anchor implant member in a fixed and rigid manner. With the anchor implant members affixed to the maxilla and the maxilla surgically separated between the upper and lower anchor implant members to create a lower portion detached an upper portion, the at least one bridging implant member is connected between the upper and lower anchor implant members to secure and maintain the lower portion of the maxilla in a desired post-operative position relative to the upper portion of the maxilla.

Abstract: The mode-whisperer waveguide device includes a main waveguide, a junction waveguide and a pair of recombination arm waveguides. The main waveguide features a spline taper extending along an axis of the main waveguide. The spline taper has been integrated with the normal linear aperture taper. The junction waveguide is attached to the main waveguide. The recombination arm waveguides are attached to the junction waveguide. A first port is coupled to the pair of recombination arm waveguides via a pair of recombination arm transformer steps. The main waveguide, the junction waveguide, the pair of recombination arm waveguides and the pair of recombination arm transformer steps are manufacturable as a monolithic waveguide device that is configured to achieve outstanding higher-order mode suppression due to the gradual dual spline taper which has been integrated with the normal linear taper to the aperture port.

Abstract: Systems and methods described herein may produce a modified substrate. A process for producing a modified substrate may include providing a substrate that is 5 microns or less in thickness, ion tracking the substrate, and etching the tracked substrate with an etchant to produce a plurality of pores in the substrate. In some implementations, the substrate may be a polymer. In some implementations, the ion tracking may include controlling a flux of ions passing through the substrate to achieve a desired pore density. In some implementations, the track-etching of the substrate may create a 10% or more porosity in the substrate. In some implementations, the process may further include using the track-etched substrate as a support substrate for at least one of a single-layer graphene film, multi-layer graphene film, stack of graphene films, nanostructure of graphene flakes, or nanostructure of graphene platelets.

Abstract: Radar signals are generated to have signal characteristics that define multiple sub-pulses in each of a plurality of pulse repetition intervals (PRIs) of a single radar dwell. Electromagnetic radiation is emitted according to the radar signals and the emitted electromagnetic radiation is sensed as radar return signals over a receive interval in each PRI. Coherent integration is performed on a set of the radar return signals and non-coherent integration is performed on another set of the radar return signals.

Abstract: A pitch bearing assembly for a rotor blade and a hub assembly of a rotary wing aircraft includes a single inner race. An inboard outer race surrounds an inboard portion of the inner race and includes a first inboard blade connector and a second inboard blade connector that are configured to connect to the rotor blade. An inboard bearing is disposed between the inboard portion of the single inner race and the inboard outer race and includes an elastomer. An outboard outer race surrounds an outboard portion of the single inner race and includes a first outboard blade connector and a second outboard blade connector that are configured to connect to the rotor blade. An outboard bearing is disposed between the outboard portion of the inner race and the outboard outer race and includes an elastomer.

Abstract: A hinged component fabrication method in which, in a layup stage of fabrication, the component includes a live hinge joining uncured material portions together at a hinge region and comprising a layer of tensile fabric at least partially infiltrated by an uncured elastomer layer at least partially interposed between the tensile fabric and the uncured material portions such that the uncured elastomer blocks the uncured material portions from infiltrating the hinge region. The method may include locating overlapped tensile fabric and elastomer layers in a tool and introducing polymer-based material into the tool such that polymer-based material portions overlap respective opposite ends of the fabric and elastomer layers. The polymer-based material portions are formed to a desired shape using the forming tool so that the fabric and elastomer layers form a live hinge between the polymer-based material portions.

Abstract: A shelf has been disclosed, which provides a level with a support bridge, a first vertical support, and a second vertical support. The support bridge, the first vertical support, and the second vertical support forming three points in the level that support an object in alternative right or left arrangements at an angle where the objects extend upward and outward from the support bridge. In particular configurations, each of the first vertical support and the second vertical support comprise a shelving portion and each of the first vertical support and the second vertical support comprise an end support.

Abstract: A head-mounted display (HMD) apparatus comprising at least one optical system, each optical system comprising a lens having a reflective optical surface and an HMD device associated with and distanced from the reflective optical surface. The HMD device comprises a substrate having horizontal and/or vertical convex curvatures having a curved geometric profile which continuously curves with smooth transitions in horizontal and/or vertical dimensions. The curved profile is dimensioned to curve around a temple of a wearer and extend in a direction toward an ear of a wearer. The substrate comprising a plurality of pixel elements arranged along the horizontal convex curvature and being controlled to selectively radiate light representative of computer-generated content (CGC) to the associated reflective optical surface such that those selected pixel elements for display emanate rays of the light for subsequent reflection from the reflective optical surface toward a respective one eye of the wearer.

Abstract: Disclosed herein is a snap alignment guard for a nut plate ring. The alignment guard includes a curved elongated body comprising an inner surface and an outer surface. The alignment guard further includes a plurality of couplings extending from the inner surface. Each of the plurality of couplings are configured to engage a nut plate ring to attach the alignment guard to the nut plate ring. The elongated body forms a plurality of apertures defined in the outer surface. Each of the plurality of apertures are configured to receive at least a portion of a nut plate to maintain a circumferential position of the nut plate relative to an inner surface of the nut plate ring.

Abstract: A modular spacecraft is provided. The modular spacecraft includes a bus module and a payload module. The bus module provides additional thermal radiative capacity for the payload module by including a bus-panel payload thermal zone that couples operational components of the payload module to a radiator panel in the bus module. The bus module also includes its own operational components that are thermally coupled to the radiator panel but that are thermally isolated from the payload module and the bus-panel payload thermal zone.

Abstract: In one embodiment, an aircraft includes a wing operable to fold along a wing fold gap. The wing comprises an inboard edge flap and an outboard edge flap, wherein the wing fold gap is between the inboard edge flap and the outboard edge flap. The aircraft further includes an input shaft operably coupled to the inboard edge flap, the input shaft mechanically coupled to a first magnetic torque coupler assembly at a first end of the input shaft. The wing further includes an output shaft operably coupled to the outboard edge flap, the output shaft mechanically coupled to a second magnetic torque coupler assembly at a first end of the output shaft. The first magnetic torque coupler assembly may magnetically couple to the second magnetic torque coupler assembly across the fold gap.

Abstract: In an embodiment, a system includes a three-dimensional (3D) printer, a neutral feedstock, a p-doped feedstock, an n-doped feedstock, and a laser. The 3D printer includes a platen and an enclosure. The platen includes an inert metal. The enclosure includes an inert atmosphere. The neutral feedstock is configured to be deposited onto the platen. The neutral feedstock includes a halogenated solution and a nanoparticle having a negative electron affinity. The p-doped feedstock is configured to be deposited onto the platen. The p-doped feedstock includes a boronated compound introduced to the neutral feedstock. The n-doped feedstock is configured to be deposited onto the platen. The n-doped feedstock includes a phosphorous compound introduced to the neutral feedstock. The laser is configured to induce the nanoparticle to emit solvated electrons into the halogenated solution to form, by reduction, layers of a ceramic comprising a neutral layer, a p-doped layer, and an n-doped layer.

Abstract: An optical orbital angular momentum (OAM) encoding system includes an optical source configured to generate a source light, an optical OAM encoder configured to encode the source light based on OAM modes to generate an encoded light, and an optical unit configured to direct the encoded light to a target.

Abstract: The present disclosure is directed to methods for levelizing circulation rates over multiple electrochemical cells of an electrochemical cell stack due to a pressure drop that occurs at an outlet of each electrochemical cell.