Abstract: A compact, low-power, high image rejection sideband separation receiver is provided. The receiver observes an input radio frequency (RF) signal of multiple spectral lines (spectral observation), then downconverts the signals to intermediate frequency (IF), and then separates the signals to be observed simultaneously in multiple channels. An embodiment is used to observe a signal (G-band) with two spectral lines and utilizes a two stage Weaver architecture to downconvert the signal's frequency, including a combination of mixers in the second stage that achieves the separation of two different channels.

Abstract: Provided are separator systems for electrochemical systems providing electronic, mechanical and chemical properties useful for a variety of applications including electrochemical storage and conversion. Embodiments provide structural, physical and electrostatic attributes useful for managing and controlling dendrite formation and for improving the cycle life and rate capability of electrochemical cells including silicon anode based batteries, air cathode based batteries, redox flow batteries, solid electrolyte based systems, fuel cells, flow batteries and semisolid batteries. Disclosed separators include multilayer, porous geometries supporting excellent ion transport properties, providing a barrier to prevent dendrite initiated mechanical failure, shorting or thermal runaway, or providing improved electrode conductivity and improved electric field uniformity.

Abstract: The present invention relates to anti-HIV antibodies. Also disclosed are related methods and compositions. HIV causes acquired immunodeficiency syndrome (AIDS), a condition in humans characterized by clinical features including wasting syndromes, central nervous system degeneration and profound immunosuppression that results in life-threatening opportunistic infections and malignancies. Since its discovery in 1981, HIV type 1 (HIV-1) has led to the death of at least 25 million people worldwide.

Abstract: Systems and methods for generating random quantum states or benchmarking quantum machines.

Abstract: Systems and methods for performing real-time feedback communication in accordance with various embodiments of the invention are disclosed. In many embodiments, instantaneous encoding is utilized for transmitting symbols from a streaming source over a DMC with feedback. In certain embodiments, instantaneous encoding is performed during the arriving period of the symbols. At time t, the encoder and the decoder calculate the priors of possible symbol sequences using the source distribution and the posteriors at time t?1. In a number of embodiments, the encoder and decoder then partition the evolving message alphabet into groups, so that the group priors are close to the capacity-achieving distribution. In contrast to the SED rule for symmetric binary-input channels, partitioning processes in accordance with several embodiments of the invention utilize group priors instead of group posteriors for the partitioning.

Abstract: A method, apparatus, and system provide the ability to act on cyber risks and reduce cyber attacks. System characteristics and system information for a cyber system are gathered. The system characteristics and system information are preprocessed to identify vulnerabilities that are relevant to the cyber system. A system model of a cyber environment is generated for the cyber system. One or more features are converted from cyber threat reports to one or more semantically relevant queries over the system model. The system model is reasoned over to generate one or more answers relevant to the one or more semantically relevant queries. Attack models are executed over the system model to generate actionable intelligence and reduce cyber attacks.

Abstract: An ultrasound measurement device includes: a processing device and multiple ultrasound sensors that capture tomographic information of a physiological structure. The ultrasound sensors include a first ultrasound sensor including a first transducer having a first frequency response with a first resonant frequency, and a second ultrasound sensor including a second transducer having a second frequency response with a second resonant frequency different from the first resonant frequency. The first frequency response partially overlaps with the second frequency response.

Abstract: A method, system, and apparatus for an unmanned aerial vehicle (UAV) to autonomously reconstruct overflown terrain and detect safe landing sites. A UAV autonomously acquires on-board pose estimates from an on-board visual-inertial-range odometry method during flight. The on-board pose estimates are utilized as a pose prior and to regain metric scale during three-dimensional (3D) reconstruction. The on-board pose estimates are corrected based on a bundle adjustment approach using previously acquired images. 3D reconstruction is performed based on multiple captured images taken from an on-board camera. Range data from the multiple captured images is fused into a multi-resolution height map. A safe landing site on the terrain is detected based on the multi-resolution height map.

Abstract: A system provides descriptor-based feature matching during terrain relative navigation (TRN). A scale and orientation (SO) module acquires a source image, image and slope pixel windows, and ring mask. The SO module combines corresponding pixels from the image pixel window and the slope pixel window to generate intermediate values, accumulates the intermediate values into ring accumulators, sums the accumulated values to generate a final ring value, and determines an orientation stability measure, and final scale and orientation values. An extract descriptors (ED) module acquires the source image, the image and slope pixel windows, final scale and orientation values, sector values, and a rink mask value. The ED module identifies pixels of interest, reorients the sector values. combines corresponding pixels from the image pixel window and the slope pixel window, accumulates and normalizes the intermediate values, and generates an image feature descriptor per coordinate.

Abstract: Embodiments described herein include systems and techniques for converting (i.e., transducing) a quantum-level (e.g., single photon) signal between the three wave forms (i.e., optical, acoustic, and microwave). A suspended crystalline structure is used at the nanometer scale to accomplish the desired behavior of the system as described in detail herein. Transducers that use a common acoustic intermediary transform optical signals to acoustic signals and vice versa as well as microwave signals to acoustic signals and vice versa. Other embodiments described herein include systems and techniques for storing a qubit in phonon memory having an extended coherence time. A suspended crystalline structure with specific geometric design is used at the nanometer scale to accomplish the desired behavior of the system.

Abstract: A method of growing one or more graphene sheets on one or more regions of an optical fiber using plasma-enhanced chemical vapor deposition (PECVD) includes placing the optical fiber in a growth chamber, placing one or more carbon-containing precursors in the growth chamber, forming a reduced pressure in the growth chamber, and flowing methane gas and hydrogen gas into the growth chamber. The method also includes generating a plasma in the growth chamber, forming a gaseous carbon-containing precursor from the one or more carbon-containing precursors, exposing the one or more regions of the optical fiber to the methane gas, the hydrogen gas, the gaseous carbon-containing precursor, and the plasma, and forming the one or more graphene sheets on the one or more regions of the optical fiber.

Abstract: A system and method for improving the flight control and efficiency of an aerial vehicle. Many embodiments are directed to a rotor-shroud assembly system where a plurality of rotor blades are connected to the internal side of a shroud and are set up to pivot through the use of a pitching mechanism. The entire assembly is configured to rotate when attached to a motor.

Abstract: The present disclosure describes an interferometer interfering a plurality of bosonic particles at one or more inputs so as to form one or more first outputs, one or more second outputs, and one or more third outputs. The one or more third outputs output one or more purified bosonic particles depending on the presence of absence of bosonic particles at the first outputs and second outputs.

Abstract: A synchronization system for synchronizing photons in a quantum teleportation network. The synchronization system includes a multiplexer combining a clock pulse with a signal photon (carrying a qubit) in an optical fiber, the optical fiber connecting a transmitter node (including the multiplexer) and a receiver node (comprising a demultiplexer). The signal photons have signal wavelengths red shifted as compared to clock wavelengths of the clock pulses. The clock pulses have an intensity below a threshold, such that Raman scattering of the clock pulses by the fiber (shifting the clock wavelengths into the signal wavelengths) is negligible. The receiver node comprises a demultiplexer demultiplexing the one of the signal photons and the one of the clock pulses; a first detector detecting the one of the signal photons; and a second detector detecting the one of the clock pulses.

Abstract: Communication systems and methods in accordance with various embodiments of the invention employ a rateless coding strategy in which an encoder utilizes codewords located within a restricted subset of a multi-dimensional sphere. In one embodiment, a transmitter is configured to encode message data as symbols using a rateless code until an end of epoch message is received, where the rateless code comprises a set of codewords characterized in that they are located within a restricted subset of a multi-dimensional sphere. A receiver receives observed symbols and at each of a predetermined set of decode times, determines whether a decoding rule is satisfied. When the decoding rule is satisfied, the receiver decodes at least one message using the rateless code and transmits an end of epoch message.

Abstract: Methods and systems for indoor position sensing are disclosed. The described methods and systems are based on magnetoquasistatic field coupling theory and can be implemented in two- and three-dimensional, long-range, through-the-wall applications, where the transmitting devices are implemented outdoor, the receiving device is implemented indoor, or vice versa. Measurement systems implemented to characterize the disclosed methods are also presented for both two- and three-dimensional applications involving indoor position sensing. Orientation sensing methods and systems are also disclosed.

Abstract: Methods, systems, and devices are disclosed for an efficient hardware architecture to implement gradient boosted trees for detecting biological conditions. For example, a method of detecting a biological condition includes receiving, by a device, a plurality of physiological signals from a plurality of input channels of the device, selecting, based on a trained prediction model, one or more input channels from the plurality of input channels, converting the one or more physiological signals received from the one or more input channels to one or more digital physiological signals, identifying, by using the plurality of gradient boosted decision trees, the selected characteristic in the one or more digital physiological signals, and determining a presence of a physiological condition based on an addition of the output values obtained from the plurality of gradient boosted decision trees.

Abstract: Harmonic drives (HDs) are used widely in robotics as a method for achieving high gear reductions and for driving force transmissions. The HD is made a three components: a wave generator, a flexspline, and a circular spline. Low-cost wave generators for metal strain wave gearing are provided. Wave generators are provided that incorporate commercially available bearings that form an ellipse either statically or through adjustment. Wave generators are optimized to maximum performance, including increasing the efficiency and the lifetime, while maximizing the running torque. The shape, size, number, type and location of the bearings can be changed so that the wave generator fails at a similar lifetime as a low cost flexspline. The shape of the wave generator may be adjusted to change the performance of the strain wave gear. The combination of low-cost flexsplines with low-cost wave generators reduces the cost of the strain wave gear.

Abstract: Orientation and position sensing methods and devices are disclosed. The described methods and devices are based on implementing magneto-electric-quasi-static fields for position and orientation sensing in lossy-dielectric, conducting, or metallic non-line-of-sight environments, where obstructions or occlusions or nearby objects exists that are lossy in nature and that typically perturb radio or electromagnetic wave signaling. Detailed experimental results highlighting the performance of the disclosed methods are also presented.

Abstract: Some embodiments include bacterial species for use in treatment of one or more autism spectrum disorder (ASD), and/or schizophrenia symptoms in a subject in need thereof. The subject in need thereof can have a gut microbiota signature characteristic of an adult. The bacterial species can include Bacteroides (e.g., B. fragilis, B. thetaiotaomicron, and/or B. vulgatus), and/or Enterococcus (e.g., E. faecalis, E. faecium, E. hirae, E. avium, E. durans, E. gallinarum, or E. casseliflavus). Upon treatment, one or more ASD-related behaviors can be improved in the subject.