Abstract: Methods and systems are provided for automatic classification of information in an adversarial machine learning setting. For example, a learner that includes multiple classifiers may perform data classification automatically. Each classifier may be trained with adversarial data of a different strength. For a given query to be classified, the learner is configured to intelligently select a classifier that is commensurate with the adversarial strength of the data inside the query, without explicit knowledge of that data or its adversarial strength.

Abstract: A tera-sample-per-second waveform generator comprising: a first transmission line having a terminated end and an output end; an anti-reflection load coupled to the terminated end of the first transmission line; a plurality of current sources, wherein each current source is configured to inject current into the first transmission line; and a second transmission line configured to feed the first transmission line with a seed signal through the plurality of current sources such that the second transmission line has a different time delay between current sources than the first transmission line, wherein the seed signal triggers the current sources to inject current into the first transmission line in order to generate an output waveform.

Abstract: A water submersion detection system that may include a buoyant device having a conductive surface, and a housing enclosing the buoyant device and having conductive elements. The conductive elements may include a first set of one or more nonadjacent conductive elements that are electrically connected, and a second set of one or more nonadjacent conductive elements that are electrically connected. The system may include a submersion alert device that activates responsive to the buoyant device contacting the housing.

Abstract: An in-situ bollard tester. The in-situ bollard tester may comprise: a frame, cable, and tensioner. The frame is preferably adapted to mount onto a pier or wharf and around a bollard to provide structural support for the cable and tensioner. The frame may comprise a rectangular frame, pair of hanging columns, pair of jacks and pair of legs. The pair of jacks are coupled near proximal corners of the rectangular frame and are vertically disposed. The hanging columns are coupled near distal corners of the rectangular frame. The pair of legs are coupled at the lower ends of the hanging columns and are disposed in a horizontal manner. The tensioner may be coupled above the rectangular frame. The cable may fasten to the bollard, and the tensioner may apply tension to the cable at various load angles in order to test the integrity of the bollard.

Abstract: Magnon excitation and detection systems, apparatus, and methods are provided. The systems and apparatus may include magnon exciters and magnon detectors. The systems and apparatus are used in accordance with methods for exciting and detecting magnons.

Abstract: Provided is a radar and communications enhanced sail for a sailboat, sail ship, or sail drone. The sail includes a first sail section comprising an active communication system, a second sail section comprising a passive communication system, or a combination thereof. The active communication system includes an antenna array (transceiver) and a software-defined radio (SDR), while the passive communication system comprises a reflective panel or sections and/or array of reflector panels or sections. The active system utilizes its SDR and transceiver to communicate back and forth with an onshore SDR and transceiver to provide information as necessary. The passive system receives a radar signal via the reflective material on the sail and reflects the signal back at the radar, which produces a radar cross section indicating that there is an object (in this case the sailboat) in the ocean.

Abstract: A method for growing nanocrystalline diamond (NCD) on Ga2O3 to provide thermal management in Ga2O3-based devices. A protective SiNx interlayer is deposited on the Ga2O3 before growth of the NCD layer to protect the Ga2O3 from damage caused during growth of the NCD layer. The presence of the NCD provides thermal management and enables improved performance of the Ga2O3-based device.

Abstract: An in-situ method for changing surface features of a metal workpiece. An electrically conductive workpiece is immersed in a bath containing an electrolyte solution devoid of ions corresponding to the workpiece. A counter electrode is immersed in the bath. An electric power supply is connected to the workpiece and the counter electrode. An electric current is passed in a first direction between the workpiece and the counter electrode, while the workpiece serves as an anode. The electric current polarity is reversed to pass the electric current in a second direction between the metallic workpiece and the electrode, while the workpiece serves as a cathode. The electric current polarity in the first direction drives ions from the workpiece into the electrolyte solution, and the electric current polarity in the second direction plates the ions onto the workpiece in the same bath.

Abstract: Provided is a tool for providing long distance shooters with the ability to receive information from others in the field to adjust their weapon system for the best advantage based on distance, location, and range. The tool may implemented as an application on a mobile device such as a smart phone, for example, making the tool light weight, space efficient, and portable for use in the field. The communication ability allows for tracking shooting partners as well as on-the-spot coordination. The tool further provides range markings, yard lines, and topographic data that allow the shooter to make decisions based on real time data. Shooters are therefore afforded a tool that is portable, easy to use, and flexible enough to use in high-pressure environments.

Abstract: A computer-implemented method for deriving resistance, inductance, and capacitance (RLC) values of an RLC equivalent circuit model associated with a fireset.

Abstract: The embodiments include an array in intimate adjacent contact with a substrate foundation. The array has a plurality of radio frequency (RF) witness films overlain on the substrate foundation. Each RF witness film is a unit cell defined in a three-dimensional coordinate frame of reference, and is centered at an origin of the three-dimensional coordinate frame of reference. Each RF witness film in the plurality of RF witness films is equally-spaced from adjacent RF witness films.

Abstract: A self-adjusting band that includes one or more banding segments, one or more buckling assemblies, a pair of one pin and two links for each buckle assembly, a rotary joint base for each pair of one pin and two links, and a high-load, low-deflection compression spring for each section of the buckle assembly.

Abstract: A sandwich cable fairing designed for attachment to cables that are towed at operational speeds by marine vessels. The sandwich cable fairing has a design that combines layers of elastic and damping materials. The fairing dampens the vibration caused when the cable is towed at operational speeds. The outer layers (“bread”) of the fairing are made from a material with a modulus of elasticity that provides a desired amount of stiffness. In the middle of the sandwich cable fairing is damping layer made from a viscoelastic material. The layering of materials allows the fairing to have the flexibility to be crushed by cable equipment while maintaining the requisite stiffness to reducing flapping and the resulting vibration.

Abstract: A corrosion resistant bimetal includes a part and one or more sacrificial anodes. The part includes a metal component that is susceptible to corrosion. The sacrificial anodes consists of an attachment to the part through a metallic bond between the metal component and the sacrificial anode to form a crystalline solid that includes the sacrificial anode and the metal component of the part.

Abstract: Provided is a gyroscope stabilized gimbal assembly for collecting and timestamping video data and laser measurement data. The assembly can be used on multiple platforms and provides an ISR video camera system and one or more laser measurement devices, including photodetectors, thermopiles, filters, and analog to digital converters. The components are mounted to a bracket that can be installed and removed from the assembly to collect/record measurement data from the devices interacting with the laser beam. A processor collects and records measurement data from the devices interacting with the laser beam and calculates optical power data, irradiance data, and wavelength data. A storage device stores a first set of data comprising video data from said camera system and a second set of data comprising optical power data, irradiance data, and wavelength data, wherein said first and second set of data are timestamped, separated, and not comingled.

Abstract: The invention is a system and method for efficient filtering, clustering, tracking and persistent motion detection for event cameras. More particularly, embodiments of the present invention combine compatible asynchronous event filtering and clustering techniques in a computationally efficient way to identify and track objects in the field of view that exhibit persistent motion characteristic of marine vessels, cars, aircraft, and other vehicles while ignoring dynamic background elements that move in a more erratic fashion.

Abstract: A technique for selective-area diffusion doping of III-N epitaxial material layers and for fabricating power device structures utilizing this technique. Dopant species such as Mg are introduced into the III-N material layer and are diffused into the III-N material by annealing under stable or metastable conditions. The dopant species can be introduced via deposition of a metal or alloy layer containing such species using sputtering, e-beam evaporation or other technique known to those skilled in the art. The dopant material layer is capped with a thermally stable layer to prevent decomposition and out-diffusion, and then is annealed under stable or metastable conditions to diffuse the dopant into the III-N material GaN without decomposing the surface.

Abstract: A method of determining ocean state. The method may include receiving, by a processing device, data associated with a prior ocean forecast state, and receiving, by the processing device, data associated with a first set of ocean temperature and salinity observations. The method may include receiving, by the processing device, data associated with a first set of ocean acoustic pressure observations. The method may include determining, by the processing device, a correction to the prior ocean forecast state based on a forward acoustic model, on an adjoint acoustic model, on the data associated with a first set of ocean temperature and ocean salinity observations, and on the data associated with a first set of ocean acoustic pressure observations, and generating, by the processing device, a current ocean state based on the determined correction.

Abstract: Disclosed are methods and apparatus for recording time, latitude, longitude, frequency, and amplitude data to ascertain information about the radio frequency (RF) environment (e.g., RF emitter locations), where the apparatus is also easily transportable. The location determination method using this simple hardware solution may occur in two processes or phases: (1) a data collection phase; and (2) a data processing phase, although these two phases may also be combined in time for a real time solution. During the data collection phase, a user may select a desired frequency range and step size for analysis. A software defined radio (SDR) sweeps through the desired frequencies and records the amplitude associated with each frequency. Each of the recorded points are stamped with their time and geolocation (i.e., latitude and longitude coordinates) and processed using amplitude measurements to ascertain the locations of unknown emitters.

Abstract: A system for supplying hydrogen gas to a lighter-than-air (LTA) vehicle includes a manifold having multiple vessels. Each vessel has a first chamber that is separated from a second chamber by a barrier. A trigger assembly integrated with the barrier allows a liquid to be combined with a reactant and a catalyst in the second chamber to form a chemical reaction to generate hydrogen gas. A pressure relief valve located on each vessel opens to allow the hydrogen gas to exit when a predetermined pressure is reached, and the hydrogen gas is supplied to the LTA vehicle connected to the manifold.