Abstract: A computer-implemented method performed at a health study management system collects health-related data from data sources, including sensors monitoring system users. A modular data ingestion subsystem includes interface modules adapted to receive health-related data from a respective type of data source. A modular data processing subsystem includes processing modules, processing health-related data to determine derived health indicators. The system receives configuration information for a health study using the health study management system, the configuration information specifying data collection activities, for collecting respective health-related data. The data collection activities include sensor-based data collection activities associated with a sensor type for collecting sensor data, and processing collected sensor data. The data ingestion subsystem and data processing subsystem are configured for the health study.

Abstract: A method and apparatus are for movement analysis. The apparatus and method receive acceleration data from an accelerometer (or measurements from other motion sensors) that is carried by a user. The acceleration data is divided into epochs and a determination is made as to whether the user is walking or running within each epoch. Consecutive epochs in which the user is found to be walking may be concatenated to determine periods of time during which the user is walking or running. An initial estimate of the time that the user starts to walk or run and stops walking or running are determined for each period of walking. An iterative optimization process is then performed to determine accurate start and stop times for the period of walking or running.

Abstract: An apparatus and method determine movement information for a user that carries an accelerometer whilst moving. The apparatus receives acceleration data from the accelerometer defined relative to a frame of reference of the accelerometer. A transformation is determined and applied to the acceleration data or to data derived from the acceleration data to determine acceleration data is a user frame of reference that includes a user direction of travel and a side to side direction transverse to the user direction of travel. The acceleration data or data derived from the acceleration data is analyzed to determine a time period corresponding either to a user stride period or to a step period as the user is walking or running; and information about accelerations in the side to side direction are used to disambiguate whether the determined time period corresponds to the user stride period or to the user step period.