Abstract: A frac dart including a pressure housing, a mechanical sensor disposed through the pressure housing, a contactor inside the pressure housing and in operable communication with the mechanical sensor, and an electrical counter disposed in the pressure housing and responsive in increments to movement of the mechanical sensor that closes the contactor.

Abstract: A mobile robotic device includes a mobile base and a mast fixed relative to the mobile base. The mast includes a carved-out portion. The mobile robotic device further includes a three-dimensional (3D) lidar sensor mounted in the carved-out portion of the mast and fixed relative to the mast such that a vertical field of view of the 3D lidar sensor is angled downward toward an are in front of the mobile robotic device.

Abstract: An apparatus is provided that includes a diamond bearing surface positioned in sliding engagement with an opposing bearing surface of a diamond reactive material. The opposing bearing surface is hardened via a material treatment.

Abstract: Various aspects of the subject technology relate to a lidar validation system. The lidar validation system is configured to acquire one or more lidar point clouds from a lidar unit, wherein the lidar unit comprises one or more lasers, and wherein each point cloud is a representation of a scene according to a laser in the lidar unit, the scene comprising a fiducial target. The lidar validation system is configured to generate, based on points in the one or more point clouds, a target cloud that correspond to the fiducial target, perform a rigid body processing to minimize a sum of distances from each point in the target cloud to the fiducial target, and generate lidar validation measurements based on the distances from each point in the target cloud to the fiducial target.

Abstract: Machine learning model development and optimization tools are provided that ensure performance validation and data sufficiency for regulatory approval. According to an embodiment, a computer implemented method can comprise training a machine learning model to perform an inferencing task on an initial set of data samples included in a sample population. In various embodiments, the model can include a medical AI model. The method further comprises determining, by the system, subgroup performance measures for subgroups of the data samples respectively associated with different metadata factors, wherein the subgroup performance measures reflect performance accuracy of the machine learning model with respect to the subgroups. The method further comprises determining, by the system, whether the machine learning model meets an acceptable level of performance for deployment in a field environment based on whether the subgroup performance measures respectively satisfy a threshold subgroup performance measure.

Abstract: A wrist-pose isolation system can infer a wrist pose (e.g., the user's hand position relative to her forearm) and can reduce wrist-induced jitter for projection casting in an XR environment. A user's projection cast can be determined as a combination of a “low-wrist contribution” component (e.g., a body-and-arm component) and a “high-wrist contribution” component (e.g., the pose of the wrist with respect to the arm). Using input from a gesture-tracking system, the contribution of the user's wrist pose to the user's current projection cast is calculated as a “wrist-contribution vector.” A projection cast direction can be determined as the interpolation of the current low-wrist contribution component and the high-wrist contribution component. This interpolation can be performed by weighting each by a specified amount and combining them.

Abstract: A bone screw and method of using the same for immobilizing a joint, the bone screw including a screw head, an elongate shaft having a threaded outer wall and a helically-shaped slot extending through the outer wall and longitudinally along the shaft. The slot extends longitudinally along a middle section of the threaded outer wall, terminating short of the proximal and distal ends of the shaft, or the slot extends through the distal end and/or to the proximal end of the shaft immediately adjacent to the screw head. The slot includes a cutting edge that is arranged to engage bone when the screw advances therethrough for cutting away a portion of the bone. A reservoir is located within the elongate shaft for collecting bone that is cut away or removed by the cutting edge.

Abstract: Systems and methods for implementing one or more game features across devices associated with a synchronous multimedia stream are disclosed.

Abstract: An automotive exhaust aftertreatment system includes a three-way catalyst (TWC) fluidly coupled to an internal combustion engine and a muffler, a selective catalytic reduction (SCR) unit located downstream from the TWC and upstream from the muffler, the SCR unit configured as a NOx catalytic converter and a hydrocarbon (HC) trap, and an electrically heated catalyst (EHC) located downstream from the SCR and upstream from the muffler, the EHC configured as a catalytic converter for the trapped HCs once the HCs are released from the SCR.

Abstract: An internal combustion-type engine or powertrain that is capable of burning wet-alcohol fuel mixture and including a piston reciprocating within a cylinder attached to a cylinder head and connecting to a crank shaft via a connecting rod. An intake cam and valve is mounted within an intake port formed in the cylinder head and an exhaust cam and valve is mounted within an exhaust port also formed in the cylinder head. A pressurized fuel source is introduced into the cylinder by a fuel injector and the percentage of water in the alcohol/water mix operates to prolong the cylinder pressure in order to increase a mean effective pressure (IMEP), leading to a higher torque (improved Brake Mean Effective Pressure—BMEP) of the engine via a longer pressure pulse attained during the period of preferred mechanical advantage of the crank-arm of the engine.

Abstract: Rapidly dissolving flavoring composition concentrates are provided. The flavoring composition concentrates have a flavor, a solvent system, a flavor carrier system, and a densifier. The densifier is an acid modifier present in an amount such that it optimizes the rate of dispersion of the concentrate in water.

Abstract: A monitoring system. The monitoring system may include an optical receiver configured to receive an optical signal, the receiver comprising a plurality of equalizers to partition the optical signal over a plurality of optical channels corresponding to a plurality of optical wavelengths. The monitoring system may also include an analysis component, coupled to the receiver, comprising logic, where the logic is configured to construct a plurality of sensor matrices, corresponding to the plurality of optical channels, based upon the optical signal, after reception at the receiver; determine, using the plurality of sensor matrices, a correlation between at least one pair of sensor matrices corresponding to at least one pair of optical channels of the plurality of optical channels; and determine a location of a perturbation, external to the transmission system, based upon the correlation.

Abstract: A system and/or method of treating cow feet or the feet of other animals. The present invention simplifies the operation of footbaths by extending the period of time and/or the number of cows that can be walked through prior to needing to refresh the footbath by emptying it and filling it with fresh fluid and treatment chemical.

Abstract: A landscape edging installation includes ends of landscape edging joined together by a connector. The connector may have holes in lugs that are aligned with holes in the landscape edging tabs to receive a ground spike therethrough. The connector conceals a gap between the adjacent edging pieces.

Abstract: An exemplary housing assembly is configured for use with a door operator. The housing assembly generally includes a bracket configured for mounting to the door operator, a case configured to at least partially enclose the door operator, and an attachment mechanism configured to selectively couple the bracket with the case. In certain forms, the attachment mechanism includes a resilient clip arm formed on one of the bracket or the case, and a tang formed on the other of the bracket or the case. The resilient clip arm is configured to engage the tang to maintain engagement between the bracket and the case.

Abstract: In an embodiment, a system is configured to replay and/or reconstruct execution events and system states in real time or substantially in real time starting from the point when execution of a target program has stopped to the point when the user desires to step through the target program's execution in order to debug the software. In an embodiment, a system is configured to efficiently collect trace data that is sufficient to reconstruct the state of a computer system at any point of time from the start of execution to the time execution was stopped. Efficient and effective debugging of the software can be performed using embodiments of the disclosed methods, systems, and devices.

Abstract: An insert device includes a first coupling body inserted into an engine cylinder head. The first coupling body extends around a center axis to define a first interior volume of the first coupling body that is shaped to receive a distal tip of a fuel injector. The insert device includes a second mixing body coupled with the first coupling body and extending around the center axis. The second mixing body includes conduits that receive fuel from the fuel injector and air from a combustion chamber, combine the fuel with the air, and direct the fuel-air mixture into the combustion chamber. The first coupling body has a first end surface positioned to face the cylinder head and the first coupling body is tapered such that an outer diameter of the first coupling body is larger toward the first end surface than toward the second mixing body.

Abstract: An outdoor cooking station configured to keep cooked food warm within a warming chamber of the cooking station. The cooking station includes a main body with frame components and panels, the panels coupled to the frame components so as to extend and define the warming chamber, the warming chamber positioned below heating elements supported by the main body. The warming chamber is fixedly positioned relative to the heating elements. The main body includes a door pivotably coupled to the main body and positioned along a front side of the main body, the door pivotably moveable between an open position and a closed position. With this arrangement, the door facilitates access to the warming chamber to place cooked food therein.

Abstract: This application relates to systems and methods for automatically generating experiments based on experiment requests routed to micro-services (model sub-components) using a prefix-based routing mechanism. In some examples, experiment requests may parsed to determine lower layer services (e.g., components) whose properties need to be changed for a model iteration. Prefixes in requests may be used to route the experiment requests and portions thereof to appropriate services or layers for configuration at the micro-service level. Routing tables at each higher layer may be utilized to determine the correct sub-layers to redirect a request and/or portion thereof. At micro-service level, each micro-service may store and use a configuration table to match a received parameter in a request with a property and its corresponding value for the experiment.

Abstract: A system for monitoring injuries comprising a plurality of wearable user input devices and a wireless transceiver. Each of the plurality of wearable user input devices may be configured to detect motion patterns of a user. Each of the plurality of wearable user input devices may be configured as performance equipment. The wireless transceiver may be configured to communicate the motion patterns to a user device. The user device may be configured to (i) develop and store reference patterns related to impacts, (ii) compare the detected motion patterns with the reference patterns, (iii) estimate a location and direction of an impact based on the comparison, (iv) accumulate data from the estimated impact with previously suffered impact data, (v) aggregate results based on the accumulated impact data and context information and (vi) generate feedback for the user based on the aggregated results.