1. Better Learning of Physical Activity by using Social Activity Data

2. Outline DataSet Description Current Status Proposal for improvement

3. DataSet Description Place: Kendal at Hanover Subjects: 8 Duration: 6 August 2009 to 15August 2009

4. Previous Classification Result A simple classification of activities using LogitBoost Considered activities: 1.Stationary 2.Walking 3.Upstairs 4.Downstairs

5. LogitBoost

6. Training Results Actual StationaryWalkingDownstairsUpstairs Predicted Stationary2933000 Walking012200 Downstairs011370 Upstairs0110104

7. Person 1

8. Courtesy: Linden A. Vongsathorn

9. Proposal Improve Physical activity model using Social activity

10. Proposed Changes 1.Relabel the data 2.Use extra information in a weak classifier to form a strong classifier

11. Proposed Changes(1) 3.Factor augmented Vector Auto Regressive Model

12. Proposed Changes(2) 4. Bayesian inference

13. Mixed Coupled HMM s AB PBPB PAPA 5.

14. Mixture of HMM and Factorial HMM s t AB S t+1 AB PBPB PAPA PAPA 6.