Abstract: A fluid end includes a housing having a bore extending toward a cavity and a wear sleeve positioned within the bore. The fluid end also includes a plunger positioned within a plunger bore extending through the wear sleeve, the plunger reciprocating within the plunger bore. The fluid end further includes a wear sleeve retainer coupled to the housing and positioned to block axial movement of the wear sleeve, the wear sleeve retainer having external threads along a body that engage internal threads formed in the housing. The fluid end also includes an anti-rotation system, coupled to the housing, the anti-rotation system engaging the wear sleeve retainer to block rotation of the wear sleeve retainer in at least one direction. The fluid end further includes a packing nut coupled to the wear sleeve retainer.

Abstract: An actuator is introduced that utilizes the forces that result from placing a current carrying coil in a magnetic field to rotate a connected object about at least one axis. In some embodiments, the introduced coil actuator includes a coil of conductor coupled to an arm or other type of structural element that extends radially from an axis of rotation. The introduced coil actuator can be utilized to provide motion control in a variety of different applications such as gimbal mechanisms. In some embodiments, the introduced coil actuator can be implemented in a gimbal mechanism for adjusting an orientation of a device such as a camera relative to a connected platform such as the body of an aerial vehicle.

Abstract: “A tilting apparatus for an aircraft, comprising: a tiltable aircraft component which tilts between a first and second position, at least one actuator for adjusting a tilt angle of the tiltable aircraft component, and at least one passive damper connected to the tiltable aircraft component and configured to limit a rate of change of the tilt angle of the tiltable aircraft component. The at least one passive damper is on a load path separate from a load path of the at least one actuator.

Abstract: An introduced autonomous aerial vehicle can include multiple cameras for capturing images of a surrounding physical environment that are utilized for motion planning by an autonomous navigation system. In some embodiments, the cameras can be integrated into one or more rotor assemblies that house powered rotors to free up space within the body of the aerial vehicle. In an example embodiment, an aerial vehicle includes multiple upward-facing cameras and multiple downward-facing cameras with overlapping fields of view to enable stereoscopic computer vision in a plurality of directions around the aerial vehicle. Similar camera arrangements can also be implemented in fixed-wing aerial vehicles.

Abstract: An unmanned aerial vehicle (UAV) that includes: a chassis; a plurality of arms that extend outwardly from the chassis; a plurality of propeller assemblies that are supported by the plurality of arms; a canopy that is connected to the chassis so as to provide an outer cover for the UAV that is configured to protect internal components thereof; a frame that is supported by the canopy such that the frame is isolated from the chassis; and a plurality of image capture assemblies that are supported by the frame such that the frame separates the plurality of image capture assemblies from the chassis and the canopy so as to inhibit relative movement between the plurality of image capture assemblies during operation of the UAV.

Abstract: An unmanned aerial vehicle (UAV) that includes: a chassis; a plurality of arms that extend outwardly from the chassis; a plurality of propeller assemblies that are supported by the plurality of arms; a canopy that is connected to the chassis so as to provide an outer cover for the UAV that is configured to protect internal components thereof; a frame that is supported by the canopy such that the frame is isolated from the chassis; and a plurality of image capture assemblies that are supported by the frame such that the frame separates the plurality of image capture assemblies from the chassis and the canopy so as to inhibit relative movement between the plurality of image capture assemblies during operation of the UAV.

Abstract: Systems and methods are described for pre-authentication access request screening. A server computer may receive a request for access to a resource comprising access data. The server computer may transmit, to an authentication computer, an authentication request message comprising at least a subset of the access data and receive an authentication response message comprising authentication data. The server computer may determine an access score based on the authentication data. Alternatively, the server computer may determine the access score based on the access data without using/receiving authorization data. The server computer may generate an access indicator based on the access score. The server computer may prepare and transmit an authorization request message comprising the access indicator to an authorization computer. The authorization computer may approve or decline the access to the resource based on the access indicator.

Abstract: The disclosure provides 3D bioprinted test beds and methods of making the 3D bioprinted teste beds, methods of using the 3D bioprinted test beds for testing and/or comparatively testing two or more test compounds on cell growth and/or behavior, as well as biocompatible methacrylated hyaluronic acid-based bioinks for printing the 3D test beds and/or other articles. The 3D test beds and bioinks include a hydrogel material/precursor and can include extracellular matrix components.

Abstract: Methods are disclosed in which a user performs breathing exercises with breathing apparatuses. The breathing apparatus may include a member operatively arranged with a valve mechanism with a threshold pressure. The valve mechanism of the breathing apparatus may be configured to respond when the absolute pressure within the member is greater than a threshold pressure. The breathing apparatus may be configured such that the threshold pressure of the valve mechanism is modifiable.

Abstract: Methods are disclosed in which a user performs head and neck exercises with head and neck exercise apparatuses. The head and neck exercise apparatus may include a moveable element that is displaced by tongue movement to a predetermined distance or with a predetermined force. The moveable element or another component of the head and neck exercise apparatus may be configured to generate audible, visible, or vibratory feedback. The head and neck exercise apparatus may be configured such that the moveable element is modifiable.

Abstract: Methods are disclosed in which a user performs breathing exercises with breathing apparatuses. The apparatus may include a member operatively arranged with an airflow resistance mechanism. The breathing apparatus may further include a chromogenic material, membrane, visual signal, airflow meter, acoustic device, or moveable element that may be configured to respond when the airflow or airflow rate is greater than a threshold airflow or threshold airflow rate, respectively. The breathing apparatus may be configured such that the airflow resistance mechanism is modifiable. The airflow resistance mechanism may provide a constant or variable airflow resistance during the performance of the exercise.

Abstract: An introduced autonomous aerial vehicle can include multiple cameras for capturing images of a surrounding physical environment that are utilized for motion planning by an autonomous navigation system. In some embodiments, the cameras can be integrated into one or more rotor assemblies that house powered rotors to free up space within the body of the aerial vehicle. In an example embodiment, an aerial vehicle includes multiple upward-facing cameras and multiple downward-facing cameras with overlapping fields of view to enable stereoscopic computer vision in a plurality of directions around the aerial vehicle. Similar camera arrangements can also be implemented in fixed-wing aerial vehicles.

Abstract: A breathing apparatus is disclosed that may include a member operatively arranged with a valve mechanism with a threshold pressure. The breathing apparatus may further include an acoustic apparatus, membrane, chromogenic material, or moveable element that may be configured, with or without a valve mechanism, to respond when the pressure within the member is greater than the threshold pressure. The valve mechanism of the breathing apparatus may be configured to respond when the absolute pressure within the member is greater than a threshold pressure. The breathing apparatus may be configured such that the threshold pressure of the valve mechanism is adjustable or to permit substitution of the valve mechanism. A breathing exercise system may include at least two breathing exercise apparatuses.

Abstract: Methods are disclosed in which a user performs breathing exercises with breathing exercise systems. The breathing exercise systems may include at least two different breathing apparatuses. Each breathing apparatus may include a member operatively arranged with a valve mechanism with a threshold pressure. The valve mechanism of each breathing apparatus may be configured to respond when the absolute pressure within the member is greater than a threshold pressure. Each breathing apparatus may be configured such that the threshold pressure of the valve mechanism is modifiable. The at least two breathing apparatuses may define a combined housing.

Abstract: The systems and processes described herein can provide dynamic and realistic route generation based on actual route data within the game environment. The system provides for generating a route database for use with a sports simulation game application. The present disclosure also provides for generation of routes during runtime of the game application. The route generation system can help address the problem of generating realistic and lifelike routes based on real life movements of athletes.

Abstract: The technology described herein relates to autonomous aerial vehicle rotor configurations. In some embodiments, the aerial vehicle includes a central body that extends along a longitudinal axis from a forward end to an aft end including a port side opposite a starboard side. Multiple rotor arms each have a proximal end coupled to the central body and a rotor assembly arranged at a distal end to provide propulsion for the aerial vehicle. The rotor assemblies include a first set of rotor assemblies and a second set of rotor assemblies. The first set of rotor assemblies are arranged in a non-inverted configuration on a top side of the aerial vehicle such that each rotor assembly includes an upward-facing rotor. The second set of rotor assemblies are arranged in an inverted configuration on a bottom side of the aerial vehicle such that each rotor assembly includes a downward-facing rotor.

Abstract: A procedure generation system obtains multimedia content describing performance of a task and generates a procedure including content for guiding a user through performance of the task. The procedure generation system extracts audio data from the multimedia content and generates a transcription of the audio data through application of a trained model. The transcription includes text corresponding to the audio data and timestamps associated with different text. Based on the transcription, a trained model generates a set of steps, with each step including text corresponding to different time intervals. The procedure generation system identifies portions of the multimedia content corresponding to different steps based on the time intervals and associates identified portions of the multimedia content with corresponding steps to generate the procedure. This generates a procedure with various steps including text and a corresponding portion of the multimedia content.

Abstract: An introduced autonomous aerial vehicle can include multiple cameras for capturing images of a surrounding physical environment that are utilized for motion planning by an autonomous navigation system. In some embodiments, the cameras can be integrated into one or more rotor assemblies that house powered rotors to free up space within the body of the aerial vehicle. In an example embodiment, an aerial vehicle includes multiple upward-facing cameras and multiple downward-facing cameras with overlapping fields of view to enable stereoscopic computer vision in a plurality of directions around the aerial vehicle. Similar camera arrangements can also be implemented in fixed-wing aerial vehicles.

Abstract: A fluid end includes a housing having a bore extending toward a cavity and a wear sleeve positioned within the bore. The fluid end also includes a plunger positioned within a plunger bore extending through the wear sleeve, the plunger reciprocating within the plunger bore. The fluid end further includes a wear sleeve retainer coupled to the housing and positioned to block axial movement of the wear sleeve, the wear sleeve retainer having external threads along a body that engage internal threads formed in the housing. The fluid end also includes an anti-rotation system, coupled to the housing, the anti-rotation system engaging the wear sleeve retainer to block rotation of the wear sleeve retainer in at least one direction. The fluid end further includes a packing nut coupled to the wear sleeve retainer.

Abstract: A system for an aircraft includes a tiltable proprotor that is tiltable between a lift position for providing lift for the aircraft and a forward flight position for providing forward propulsion for the aircraft is provided. The system includes at least one actuator for adjusting a tilt angle of the tiltable proprotor; and at least one passive damper connected to the tiltable proprotor and configured to limit a rate of change of the tilt angle of the tiltable proprotor.