JigSaw - T he JI Gsaw continuous Sensing engine for mobile...

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Click to edit Master subtitle style 8/25/11 The JIGsaw continuous Sensing engine for mobile phone Applications Hong Lu,† Jun Yang,! Zhigang Liu,! Nicholas D. Lane,† Tanzeem Choudhury,† Eric Minner
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8/25/11 Outline Introduction Design Considerations Detailed Design Implementation Evaluation Conclusion
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8/25/11 Introduction Paper presents a implementation and analysis for “long term sensing” on mobile devices. Attempts to balance performance needs to the resources necessary for continuous sensing. Emphasis on the accomplishing the following tasks : l Resilient accelerometer data processing
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8/25/11 Introduction Compute higher level inferences and representations of human activities and context. Goals include : l Function with different phone locations on the body and different orientations. l Allow data to be collected for a complete charge cycle while sustaining normal phone usage.
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8/25/11 Design Considerations – Accelerometer Pipeline Accelerometer sampling has a low energy cost. The main barrier here is the robustness of inferences. l The effect of the phones location on the body. l The artifacts induced between times of transition, referred to as extraneous activities .
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Design Considerations – Accelerometer Pipeline Proposed techniques to overcome issues : l Use calibration data to model the sensors response from various positions under certain activities. l
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JigSaw - T he JI Gsaw continuous Sensing engine for mobile...

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