Abstract: Determining whether an individual has turned during ambulation includes identifying a first foot parameter for the individual in at least two or more successive stances and identifying a change in the first foot parameter between the two or more successive stances. The determination also includes identifying a second foot parameter for the individual in at least two or more successive strides and identifying a change in the second foot parameter between the two or more successive strides. Based on the identified changes in the first and second foot parameters, a determination can be made whether the individual has turned during ambulation.

Abstract: Determining whether an individual has turned during ambulation includes identifying a first foot parameter for the individual in at least two or more successive stances and identifying a change in the first foot parameter between the two or more successive stances. The determination also includes identifying a second foot parameter for the individual in at least two or more successive strides and identifying a change in the second foot parameter between the two or more successive strides. Based on the identified changes in the first and second foot parameters, a determination can be made whether the individual has turned during ambulation.

Abstract: Described in this disclosure are devices, systems and methods including an article of manufacture for attachment to a foot or footwear comprising a trapezoidal shaped apparatus, wherein the trapezoidal shaped apparatus has a front, a back, wide end, a narrow end, a length, a thickness, a medial edge, and a lateral edge, and wherein the trapezoidal shaped apparatus has a plurality of distinct ridges on its lateral and medial edges.

Abstract: Determining whether an individual has turned during ambulation includes identifying a first foot parameter for the individual in at least two or more successive stances and identifying a change in the first foot parameter between the two or more successive stances. The determination also includes identifying a second foot parameter for the individual in at least two or more successive strides and identifying a change in the second foot parameter between the two or more successive strides. Based on the identified changes in the first and second foot parameters, a determination can be made whether the individual has turned during ambulation.

Abstract: Determining step lengths of an individual includes determining a relative time to be used in association with each of a plurality of heel strikes of an individual, and identifying the plurality of heel strikes. For each given identified heel strike of the plurality of identified heel strikes, a point in time that corresponds to the determined relative time is associated with the given identified heel strike. A foot speed associated with at least one of a left foot of the individual or a right foot of the individual is determined. The identified plurality of heel strikes, the associated point in time of each of the identified plurality of heel strikes, and the determined foot speed is then analyzed to determine a step length associated with at least one of the left foot of the individual or the right foot of the individual.

Abstract: Generally, implementations of the present invention include devices, systems, and methods for tracking intermittent motion. Such systems can be used to calibrate inertial measurement units (IMUs), which can be used to obtain acceleration, linear and angular velocities, orientation, and position of a moving body. Such systems also can be used to account and compensate for errors and imperfections present in an IMU prior to and during operation.

Abstract: A method and system for analyzing gait asymmetry between left and right feet of individuals by measuring and comparing stance phase time and/or stance phase force between left and right during gait, and providing real-time sensory feedback if stance phase time/force inequality exceeds a predetermined threshold.

Abstract: A method and system for analyzing gait asymmetry between left and right feet of individuals by measuring and comparing stance phase time and/or stance phase force between left and right feet during gait, and providing real-time sensory feedback if stance phase time/force inequality exceeds a predetermined threshold.

Abstract: A method and system for tracking and updating bias in an inertial sensor by determining a maximum bias drift and a noise band for a sensor, determining a prior bias value of the sensor, and measuring a current bias value of the sensor. The method and system can further include calculating a bias difference between the prior bias value and the current bias value, and updating the prior bias value with the current bias value if the current bias value is within the noise band and the bias difference is less than or equal to the maximum bias drift.

Abstract: A method and system for measuring energy expenditure of individuals by measuring force from a plurality of foot-borne force sensitive resistors and calculating incline from a foot-borne tri-axial accelerometer.

Abstract: Embodiments of the present disclosure relate to vibrometers, vibrometric systems, and methods of using the same. In particular, some embodiments of the vibrometers are capable of producing vibrotactile stimulation at any frequency between 1 and 500 Hz. Moreover, some embodiments of the vibrometer and/or vibrometric system are capable of applying vibrotactile stimulation to a test subject's skin to determine the existence of peripheral neuropathy. Additionally, some embodiments of the method can provide test subjects with comparative vibrotactile threshold test results that can aid in discovering and/or managing of peripheral neuropathy.

Abstract: Generally, implementations of the present invention include devices, systems, and methods for tracking intermittent motion. Such systems can be used to calibrate inertial measurement units (IMUs), which can be used to obtain acceleration, linear and angular velocities, orientation, and position of a moving body. Such systems also can be used to account and compensate for errors and imperfections present in an IMU prior to and during operation.

Abstract: A method and system for measuring energy expenditure of individuals by measuring force from a plurality of foot-borne force sensitive resistors and calculating incline from a foot-borne tri-axial accelerometer.

Abstract: A method and system for measuring energy expenditure of individuals by measuring force from a plurality of foot-borne force sensitive resistors and calculating incline from a foot-borne tri-axial accelerometer.

Abstract: A method and system for tracking and updating bias in an inertial sensor by determining a maximum bias drift and a noise band for a sensor, determining a prior bias value of the sensor, and measuring a current bias value of the sensor. The method and system can further include calculating a bias difference between the prior bias value and the current bias value, and updating the prior bias value with the current bias value if the current bias value is within the noise band and the bias difference is less than or equal to the maximum bias drift.

Abstract: A method and system for measuring energy expenditure of individuals by measuring force from a plurality of foot-borne force sensitive resistors and calculating incline from a foot-borne tri-axial accelerometer.

Abstract: A method and system for analyzing gait asymmetry between left and right feet of individuals by measuring and comparing stance phase time and/or stance phase force between left and right feet during gait, and providing real-time sensory feedback if stance phase time/force inequality exceeds a predetermined threshold.

Abstract: An apparatus, and method of its use, to determine a characteristic of a fluid sample contained inside a closed container. The ratio of intensity for detected radiation (e.g., light), subsequent to its transmission through the container's walls and fluid in the container, at each of a reference wavelength and a measurement wavelength is compared to a predetermined value to make a determination of the fluid's characteristic. Desirably, the wavelengths are applied to the same location on the container to minimize a source of signal error. The reference wavelength is selected for its substantial lack of attenuation when transmitted through a known fluid composition. The measurement wavelength is selected for its predictive interaction (e.g., absorption) with the fluid.