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Validated Caloric Expenditure Estimation using a Single Body-Worn Sensor

Validated Caloric Expenditure Estimation using a Single Body-Worn Sensor . outline. Motivation A bstract Introduction Conclusion. Motivation. In 2007, approximately 30% of US adults were obese Related health care costs exceeding 100 billion dollars. Abstract. Build training set

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Validated Caloric Expenditure Estimation using a Single Body-Worn Sensor

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  1. Validated Caloric Expenditure Estimation using a Single Body-Worn Sensor

  2. outline • Motivation • Abstract • Introduction • Conclusion

  3. Motivation • In 2007, approximately 30% of US adults were obese • Related health care costs exceeding 100 billion dollars

  4. Abstract • Build training set • Testing • Experient • Result

  5. Introduction • Experiment setup • Compute the caloric expenditure • V̇O2 will provide us with the ground truth caloric expenditure • What is V̇O2 ? • V̇O2 is obtained using measures of oxygen consumption. • “耗氧率”

  6. Introduction • subject

  7. Introduction • What kind of training set? • Laboratory Data Collection • Field Data Collection

  8. Introduction • How to build training set ? • Laboratory Data Collection • Participants walked and ran on a treadmill for the lab sessions • Subjects performed the walking and running stages in a predetermined order with a random starting stage to help eliminate transitional effects in the data

  9. Introduction • How to build training set ? • Field Data Collection • day-to-day activities, with each session lasting about 15 minute • Start data collection sitting down for several minutes on the 5th floor • Stand and walk to the elevator • Go down and walk outside • Walk down a small flight of ~4 stairs and then walk around an inclined area and up a set of steps • Pick up a heavy object (~20lb) and walk around with it • Place the object down and sweep the ground for approximately a minute • Walk back inside to the elevator and up to the 5th floor • Walk back to the setup area and sit for several minutes

  10. Introduction

  11. Introduction • V̇O2=R+H+V • Where Ris resting Metabolic Rate • H is Horizontal component • V is Vertical component

  12. Introduction • Step Counting

  13. Introduction

  14. Introduction • Others techniques • Barometric Pressure. • Barometric Pressure + GPS. • GPS Only. • GPS + GIS Sources. Several GIS (Geographic Information Systems)

  15. LIDAR (air-based laser range finder scans) which provide high resolution elevation profiles accurate to within 30cm.

  16. Ten folded cross validation • leave-one-out

  17. Conclusion

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