Abstract: In some examples, notification service implementation may include detecting, with respect to a notification service of a plurality of notification services, based on an analysis of signals received at an activity event hub, at least one incident associated with activities of an entity. Based on an analysis of the incident, a determination may be made as to whether the incident is actionable, and information related to the incident may be requested from a data endpoint. Based on the received information, a notification object may be generated to notify the entity of the incident. Further information related to the incident may be stored with respect to the notification service by utilizing a database that is commonly used by the plurality of notification services. A stateless restart associated with the notification service may be performed in an event of a failure of the notification service based on the stored further information.

Abstract: Determining functional residual lung capacity (FRC) by changing a subject's inspirium FiO2 by a predetermined amount, and a) for each breath in a series of breaths subsequent to changing the FiO2, determining expiratory tidal volume, determining expiratory fractional N2 tidal volume, multiplying the expiratory tidal volume by an absolute difference between the expiratory fractional N2 tidal volume of the breath and that of an immediately preceding breath for a first multiplication result, dividing the first multiplication result by the sum of the differences for a first division result, and multiplying the fractional N2 tidal volume by the sum of the first division results of the breaths for a second multiplication result, and b) dividing the sum of the second multiplication results of the breaths by the absolute difference between the fractional N2 tidal volume of the first and last breaths to produce a measurement of the subject's FRC.