Abstract: A tracking device monitors a portion of a user's skin to infer a pose or gesture made by a body part of a user that engages the portion of the user's skin as the pose or gesture is made. For example, the tracking device monitors a portion of skin on a user's forearm to infer a pose or gesture made by the user's hand. The tracking device may include an illumination source that illuminates the portion of the user's skin. An optical sensor of the tracking device may capture images of the illuminated portion of skin. A controller of the tracking device infers a pose or gesture of the body part based in part on a model (e.g., a machine-learned model) and the captured images. The model may map various configurations of the user's skin to different poses or gestures of the body part.

Abstract: In some examples, an apparatus may include a laser, a source fiber that delivers the laser radiation to an object, and a detector fiber that receives scattered laser radiation and illuminates a detector array with the scattered laser radiation to form speckles on the detector array. In some examples, the object may be directed illuminated by a laser. The detector array may include a plurality of detectors, and may be positioned to receive the scattered laser radiation from the end of the detector fiber. The distance between the detector array and the end of the detector fiber may be adjustable. A controller may be configured to receive detector data from the detector array, determine a time-dependent intensity autocorrelation function for each detector of a plurality of detectors, and determine an ensemble average autocorrelation function. The apparatus may provide information relating to dynamic processes within the object. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: Apparatuses, methods, and systems for a site survey tool are disclosed. One site survey tool includes an elevated platform comprising a directionally adjustable beam-forming antenna, and operates to adjust an elevation (z coordinate) of the adjustable beam-forming antenna, a ground unit that operates to adjust to a plurality of locations (x and y coordinates). The elevated platform and the ground unit operate to determine an angular spread boundary of a supercell base station, determine a power azimuth angular spectrum threshold needed in order for the supercell base station to support adaptive sectorization, estimate a power azimuth angular spectrum of a site, and determine that the site supports the supercell base station if the estimated power azimuth angular spectrum of the site is less than the power azimuth angular spectrum threshold at the angular spread boundary.

Abstract: Apparatuses, methods, and systems for a site survey tool are disclosed. One site survey tool includes an elevated platform, wherein the elevated platform includes a directionally adjustable beam-forming antenna, wherein the elevated platform operates to adjust an elevation of the adjustable beam-forming antenna, and wherein the elevated platform operates to transmit or receive wireless signals while the directionally adjustable beam-forming antenna changes a beam direction. Further, a ground unit transmits wireless signals to the elevated platform or receives wireless signals from the elevated platform while the directionally adjustable beam-forming antenna changes the beam direction.

Abstract: An apparatus includes a base layer; and a superconducting nanowire disposed on the base layer in a continuous meander pattern and including an amorphous metal-metalloid alloy such that the apparatus is configured to detect single photons, and the continuous meander pattern includes: a plurality of parallel line segments; and a plurality of curved segments, wherein adjacent parallel line segments are joined by a curved segment.

Abstract: An multiplexer includes: a plurality of single photon detectors arranged in a two-dimensional array; a plurality of first bias lines in electrical communication with the single photon detectors; a plurality of second bias lines in electrical communication with the single photon detectors; a plurality of first readout lines in electrical communication with the single photon detectors; and a plurality of second readout lines in electrical communication with the single photon detectors, wherein, for every single photon detector, the first bias line is in electrical communication with the first readout line in a first common line, and for every single photon detector, the second bias line is in electrical communication with the second readout line in a second common line such that the multiplexer is configured for resistive current splitting.

Abstract: Optical detectors and associated systems and methods are generally described. In certain embodiments, the optical detectors comprise nanowire-based single-photon detectors, including those with advantageous geometric configurations.