Abstract: A computer system can include an input device having a housing defining an internal volume. The housing can include a grip portion and a base portion defining an aperture. The computer system can also include a tilt sensor disposed in the internal volume, a position sensor disposed at the aperture, and a processor. The processor can be electrically coupled to the position sensor, the tilt sensor, and a memory component storing electronic instructions that, when executed by the processor, cause the processor to receive a first input from the tilt sensor, receive a second input from the position sensor, determine, based on the first and second inputs, if the base is in contact with a support surface and an angle of the base relative to the support surface. The processor can also output a signal based on the angle if the base is in contact with the support surface.

Abstract: A three-dimensional control system includes an input device, a computing device, and a tracking assembly. The input device can include an input sensor, an inertial measurement unit sensor, and an ultrasonic speaker. The tracking assembly can include a plurality of ultrasonic microphones and an inertial measurement unit disposed on or with the computing device. The plurality of ultrasonic microphones can include three microphones in a first plane and at least one other ultrasonic microphone disposed out of the first plane. The ultrasonic microphones can be configured to detect ultrasonic waves output by the speaker of the input device and the computing device can triangulate the position of the input device relative to the computing device in space.

Abstract: A computer input system includes a mouse including a housing having an interior surface defining an internal volume and a sensor assembly disposed in the internal volume. A processor is electrically coupled to the sensor assembly and a memory component having electronic instructions stored thereon that, when executed by the processor, causes the processor to determine an orientation of the mouse relative to a hand based on a touch input from the hand detected by the sensor assembly. The mouse can also have a circular array of touch sensors or lights that detect hand position and provide orientation information to the user.

Abstract: An input device, such as a mouse, can include a housing defining an exterior grip portion and an internal volume, a sensor assembly disposed in the internal volume, and an emitter electrically coupled to the sensor assembly. In response to the sensor assembly detecting a first touch input on the housing, the emitter sends a first signal including information regarding an angular position of the grip portion. In response to the sensor assembly detecting a second touch input on the housing, the emitter sends a second signal including information regarding a direction of a force exerted on the housing from the second touch input.

Abstract: An input device can include a housing defining an internal volume and a lower portion, the lower portion defining an aperture, an input sensor disposed in the internal volume, and a haptic assembly disposed in the internal volume. The haptic assembly can include an actuator and a foot coupled to the actuator and aligned with the aperture. The actuator can be configured to selectively extend the foot through the aperture to vary a sliding resistance of the input device on a support surface.

Abstract: A method and system for detecting a spatial and temporal location of a contrast injection in a fluoroscopic image sequence is disclosed. Training volumes generated by stacking a sequence of 2D fluoroscopic images in time order are annotated with ground truth contrast injection points. A heart rate is globally estimated for each training volume, and local frequency and phase is estimated in a neighborhood of the ground truth contrast injection point for each training volume. Frequency and phase invariant features are extracted from each training volume based on the heart rate, local frequency and phase, and a detector is trained based on the training volumes and the features extracted for each training volume. The detector can be used to detect the spatial and temporal location of a contrast injection in a fluoroscopic image sequence.

Abstract: A method and system for detecting a spatial and temporal location of a contrast injection in a fluoroscopic image sequence is disclosed. Training volumes generated by stacking a sequence of 2D fluoroscopic images in time order are annotated with ground truth contrast injection points. A heart rate is globally estimated for each training volume, and local frequency and phase is estimated in a neighborhood of the ground truth contrast injection point for each training volume. Frequency and phase invariant features are extracted from each training volume based on the heart rate, local frequency and phase, and a detector is trained based on the training volumes and the features extracted for each training volume. The detector can be used to detect the spatial and temporal location of a contrast injection in a fluoroscopic image sequence.

Abstract: A method and system for detecting a spatial and temporal location of a contrast injection in a fluoroscopic image sequence is disclosed. Training volumes generated by stacking a sequence of 2D fluoroscopic images in time order are annotated with ground truth contrast injection points. A heart rate is globally estimated for each training volume, and local frequency and phase is estimated in a neighborhood of the ground truth contrast injection point for each training volume. Frequency and phase invariant features are extracted from each training volume based on the heart rate, local frequency and phase, and a detector is trained based on the training volumes and the features extracted for each training volume. The detector can be used to detect the spatial and temporal location of a contrast injection in a fluoroscopic image sequence.

Abstract: A decision construct provides a system and method of configuring/managing/controlling a networked computing environment, such as a learning technology/platform. The construct provides one or more permission levels associated with one or more users of the system, such as independent permission levels for a provost, a dean, a department chair, a course director, and a faculty member, wherein the permission levels allow differentiation amongst the users of the system as to various decisions that are made to configure the networked computing environment. The decisions are made by the user through interaction with decision cells that the user(s) is allowed access to based on their associated permission level. The access and decisions that the user is allowed to make affect various component features, such as the display and functional capabilities, of the networked computing environment.