Abstract: An embodiment simultaneously receives light waves emanating from an object and having first frequency components f1.1 and f1.2, and pumped monochromatic coherent light waves having a second frequency f2. The method non-linearly combines the light waves having the first frequency component f1.1 and the pumped monochromatic coherent light waves, and generates coherent light waves having a third frequency component f3.1 that is a sum of the first frequency f1.1 and the second frequency f2. The method non-linearly combines the light waves having the first frequency component f1.2 and the pumped monochromatic coherent light waves, and generates coherent light waves having a third frequency component f3.2 that is a sum of the first frequency f1.2 and the second frequency f2. The method digitizes the generated coherent light waves and outputs an image responsive to the light waves emanating from the object.

Abstract: A MIMO communication system is provided. The system may include a first antenna comprising a first cavity, a first plurality of RF ports for generating a feed wave within the first cavity, and a first plurality of sub-wavelength artificially structured material elements as arranged on a surface of the first cavity as RF radiators. The first antenna is configured to generate a plurality of radiation patterns respectively corresponding to the first plurality of ports. The system may also include a second antenna comprising a second cavity and a second plurality of sub-wavelength artificially structured material elements arranged on a surface of the second cavity.

Abstract: According to various embodiments, systems and methods for through imaging a medium are disclosed. An apparatus can include one or more radiating elements comprising one or more artificially-structured materials. The one or more radiating elements can be configured to transmit a radiation pattern of electromagnetic energy into a medium. The apparatus also can include one or more receiving elements configured to receive backscattered energy from the radiation pattern of electromagnetic energy transmitted into the medium. The backscattered energy received by the one or more receiving elements can be used to generate one or more through images of the medium.

Abstract: Embodiments disclosed herein relate to an interactive surgical drape and system including at least one sensor and at least one controller that operates indicating sensing feedback from the at least one sensor to cause display of information on a dynamic display integrated with the interactive surgical drape. The dynamic display assists the surgical team while performing surgery and can operate to improve the efficiency and/or effectiveness of the surgical team.

Abstract: Described embodiments include an antenna and a method. In an embodiment, the antenna includes a holographic aperture having a surface including a plurality of individual electromagnetic wave scattering elements distributed thereon with a periodic inter-element spacing equal to or less than one-half of a free space wavelength of an operating frequency of the antenna. The aperture is configured to define at least two selectable complex radiofrequency electromagnetic fields on the surface with tangential wavenumbers up to 2? over the aperture element spacing (k_apt=2?/a). In an embodiment, the holographic aperture includes an amplitude and phase modulation holographic aperture.

Abstract: Some embodiments advantageously provide a head cover to be worn by a wearer. In some embodiments, the head cover comprises a fabric having an opening at a first end and having a tail end, the fabric configured to fit over a head of the wearer and having a hole in proximity to the first end that is configured to receive a tail end of the fabric.

Abstract: A coating for mitigating metal whiskers on a metal surface includes a polymeric coating material; and a metal ion complexing agent impregnated within the polymeric coating material, the metal ion complexing agent having a standard reduction potential (E°) that is greater than a metal in the metal surface.

Abstract: Disclosed herein are energetic compositions and methods of making thereof. A composition includes particles of a nitrogen-containing oxidizer dispersed in a polymeric binder and a bonding agent bonded to a surface of at least a portion the particles. The bonding agent disclosed is a Lewis acid.

Abstract: Embodiments disclosed herein relate to an interactive surgical drape and system including at least one sensor and at least one controller that operates indicating sensing feedback from the at least one sensor to cause display of information on a dynamic display integrated with the interactive surgical drape. The dynamic display assists the surgical team while performing surgery and can operate to improve the efficiency and/or effectiveness of the surgical team.

Abstract: The present disclosure provides systems and methods associated with mode conversion for electromagnetic field modification. A mode converting structure (holographic metamaterial) is formed with a distribution of dielectric constants chosen to convert an electromagnetic radiation pattern from a first mode to a second mode to attain a target electromagnetic radiation pattern that is different from the input electromagnetic radiation pattern. A solution to a holographic equation provides a sufficiently accurate approximation of a distribution of dielectric constants that can be used to form a mode converting device for use with one or more transmission lines, such as waveguides. One or more optimization algorithms can be used to improve the efficiency of the mode conversion.

Abstract: Disclosed herein are energetic compositions and methods of making thereof. A composition includes perchlorate or nitrate containing oxidizer particles, a polymeric binder, and a borylated ferrocene derivative bonding agent bonded to a surface of at least a portion the perchlorate or nitrate containing oxidizer particles to form a Lewis complex.

Abstract: A method of pumping an optical resonator includes directing light generated by a pumping light at the optical resonator, exciting a propagating surface state of the optical resonator at an interface of the optical resonator, and changing a propagating frequency of the light proximate the interface, where the changed frequency corresponds to a propagation frequency of the surface state. The optical resonator includes a photonic crystal and a material, where the interface is formed between the photonic crystal and the material.

Abstract: A coating for mitigating metal whiskers on a metal surface includes a polymeric coating material; and a metal ion complexing agent impregnated within the polymeric coating material, the metal ion complexing agent having a standard reduction potential (E°) that is greater than a metal in the metal surface.

Abstract: Embodiments include an apparatus and method. An apparatus includes a metasurface that coherently upconverts light waves having a first frequency f1. A substrate forms a first plasmonic surface. A plasmonic nanoparticle forms a second plasmonic surface. A layer of a second-order nonlinear dielectric material is disposed between the first plasmonic surface and the second plasmonic surface. The metasurface has at least three plasmonic resonant modes including a first plasmonic resonant mode having a first frequency f1, a second plasmonic resonant mode having a second frequency f2, and a third plasmonic resonant mode having a third frequency f3 that is a sum of the first frequency f1 and the second frequency f2. The apparatus includes a second light propagation path from a source of pumped monochromatic coherent light waves having the second frequency f2 to the metasurface. A digital image capture device captures the generated light waves having the frequency f3.

Abstract: A three-dimensional map of an environment with buildings is used to computationally predict locations and times of global navigation satellite system (GNSS) transmission quality. A global navigation satellite system (GNSS) receiver can reconcile received satellite transmissions with these predicted satellite transmissions. By comparing actual transmission quality with predicted transmission quality, a system can determine unmodeled obstructions, temporary obstructions, jamming, spoofing or other origins of interference with predicted transmission quality of a satellite in a GNSS.

Abstract: A vehicle includes an occupant monitoring system and a processing circuit coupled to the occupant monitoring system. The occupant monitoring system is configured to acquire occupant data regarding an occupant of the vehicle. The processing circuit is configured to receive the occupant data; determine a vehicle operation command based on the occupant data, the vehicle operation command configured to affect operation of the vehicle while the vehicle is in a robotic driving mode; and provide the vehicle operation command to a vehicle system.

Abstract: A system for generating, forming and receiving electromagnetic transmissions according to a dynamically selectable electromagnetic pattern, beam pattern or beam form can use a selectably altered backplane structure. A spatially dependent pattern of amplitudes and/or phases can be formed by selecting a state of the selectably altered backplane structure from a set of states. The altered backplane structure can include a movable mechanical structure that causes a set of patterns of spatially dependent amplitudes of electromagnetic energy depending on a position of the structure. A beam pattern from a set of beam patterns can be selected by selecting a state (e.g., the position) of the backplane structure that creates a set of spatially dependent amplitudes of electromagnetic energy.

Abstract: An automatically adjustable radiofrequency link system includes a radiofrequency transmitter configured to transmit a signal at a frequency of transmission within an extremely high frequency (EHF) band. The system further includes a receiving device configured to receive the transmitted signal and provide feedback to a processing circuit communicatively coupled to the transmitter and the receiving device, wherein the feedback is related to the received signal. The processing circuit is configured to determine required signal properties based on the feedback and determine signal loss properties including an effect of atmospheric absorption, as a function of frequency; determine a modification to the transmitted signal using the signal loss properties and the required signal properties; and adjust the frequency of transmission to obtain a desired transmission signal using the modification.

Abstract: Systems and methods are disclosed herein for printed cavities for computational microwave imaging and methods or use. According to an aspect, an imaging system includes a printed cavity having a layer having a first surface and a second surface. The printed cavity defines multiple apertures that extend between the first surface and the second surface. The printed cavity also includes a substrate being attached to the first surface of the layer. The substrate is also configured to be fed a guided wave that excites the apertures to produce a radiation pattern for illuminating a scene. The imaging system also include one or more antennas configured to generate a signal for imaging based on the illuminated scene.

Abstract: Holographic and spotlight metamaterial apertures for microwave and millimeter wave imaging and methods of use are disclosed. According to an aspect, an imaging system includes metamaterial elements being spaced apart and configured to respond to an electromagnetic field for radiating in a predetermined pattern to illuminate a scene. The imaging system also includes one or more antennas configured to generate a signal for imaging based on the illuminated scene.