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Table 1 Definition of inputs and outputs of the H-FIS

From: Improving activity recognition using a wearable barometric pressure sensor in mobility-impaired stroke patients

Name Description
Inputs
  PrevAct Previous activity: the activity preceding the activity being evaluated by the algorithm
  CurrAct Current activity: the activity being evaluated by the algorithm
  NextAct Next activity: the activity following the activity being evaluated by the algorithm
  Transition Transition detection probability: Computed through a logistic regression model, it provides a continuous value (PTr) from 0 to 1 representing the probability for a transition to be respectively “Not Detected” and “Detected”
Transition type Transition type probability: Computed through a logistic regression model, it provides a continuous value (PType) from 0 to 1 representing the probability for a transition to be respectively of a type “Sit-to-stand” and “Stand-to-Sit”
  PrevDur Duration of the previous activity being processed
  CurDur Duration of the current activity being processed
  NextDur Duration of the activity following the activity being processed
  AltitudeChange Altitude change corresponds to the change in elevation around the transition time. It is computed on the barometric pressure signal through transition feature extraction algorithm [28]
  AltitudeIQR Altitude Inter-Quartile Range is computed over the duration of the activity on the altitude signal (derived from the barometric pressure signal)
Outputs
  Event activity Event activity represents the output of FIS I (this is the current activity recognized in this stage of classification)
  Behaviour activity Behavior Activity represents the output of FIS II and thus the final output of the H-FIS (this is the current activity recognized at the end of second stage of classification)