Abstract: A system for monitoring and modifying mobile device usage behavior is provided, comprising a portable computer device having an inertial measurement unit, a risk score engine computing a risk score from orientation data, an intervention module delivering outputs mapped to the risk score, a reinforcement learning agent updating intervention parameters from observed reorientation responses, and a sensor subsystem exclusively restoring outputs upon detecting orientation within a safe usage angle. Also provided is a system for training a population model, in which devices extract anonymized behavioral data via differential privacy and secure aggregation to a training module that trains cohort models using federated learning, and a distribution module initializes device parameters that transition from population-determined to individually-determined as usage data accumulates.

Abstract: A biomechanically optimizing mobile device use system having a mobile computer device with readable storage and a display; an orientation determination system included with the mobile device and adapted to determine a position of the mobile device; and, an operating system that, when the mobile device is powered on and upon each repositioning of the mobile device, is adapted to: determine a current position, determine a reference position relative to one of a vertical position and a face down position, determine a stress angle of the mobile device according to a difference between the current position and the reference position, and, actuate a user notification according to a determination that the stress angle exceeds a predetermined angle for a predetermined length of time.

Abstract: A biomechanically optimizing mobile device use system having a mobile computer device with readable storage and a display; an orientation determination system included with the mobile device and adapted to determine a position of the mobile device; and, an operating system that, when the mobile device is powered on and upon each repositioning of the mobile device, is adapted to: determine a current position, determine a reference position relative to one of a vertical position and a face down position, determine a stress angle of the mobile device according to a difference between the current position and the reference position, and, actuate a user notification according to a determination that the stress angle exceeds a predetermined angle for a predetermined length of time.

Abstract: A biomechanically optimizing mobile device use system having a mobile computer device with readable storage and a display; an orientation determination system included with the mobile device and adapted to determine a position of the mobile device; and, an operating system that, when the mobile device is powered on and upon each repositioning of the mobile device, is adapted to: determine a current position, determine a reference position relative to one of a vertical position and a face down position, determine a stress angle of the mobile device according to a difference between the current position and the reference position, and, actuate a user notification according to a determination that the stress angle exceeds a predetermined angle for a predetermined length of time.

Abstract: A biomechanically optimizing mobile device use system having a mobile computer device with readable storage and a display; an orientation determination system included with the mobile device and adapted to determine a position of the mobile device; and, an operating system that, when the mobile device is powered on and upon each repositioning of the mobile device, is adapted to: determine a current position, determine a reference position relative to one of a vertical position and a face down position, determine a stress angle of the mobile device according to a difference between the current position and the reference position, and, actuate a user notification according to a determination that the stress angle exceeds a predetermined angle for a predetermined length of time.

Abstract: A biomechanically optimizing mobile device use system having a mobile computer device with readable storage and a display; an orientation determination system included with the mobile device and adapted to determine a position of the mobile device; and, an operating system that, when the mobile device is powered on and upon each repositioning of the mobile device, is adapted to: determine a current position, determine a reference position relative to one of a vertical position and a face down position, determine a stress angle of the mobile device according to a difference between the current position and the reference position, and, actuate a user notification according to a determination that the stress angle exceeds a predetermined angle for a predetermined length of time.

Abstract: A biomechanically optimizing mobile device use system having a mobile computer device with readable storage and a display; an orientation determination system included with the mobile device and adapted to determine a position of the mobile device; and, an operating system that, when the mobile device is powered on and upon each repositioning of the mobile device, is adapted to: determine a current position, determine a reference position relative to one of a vertical position and a face down position, determine a stress angle of the mobile device according to a difference between the current position and the reference position, and, actuate a user notification according to a determination that the stress angle exceeds a predetermined angle for a predetermined length of time.