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Statistical challenges In Sensor Networks Jayant Gupchup , Advised by:

Statistical challenges In Sensor Networks Jayant Gupchup , Advised by: Alex Szalay, Andreas Terzis. A Typical Sensor Network. Stable Storage. Gateway/ Basestation. ……. 3.6 V 19.0 Ah. Collect-All Methodology. Nodes collect data Basestation retrieves “All data”

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Statistical challenges In Sensor Networks Jayant Gupchup , Advised by:

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  1. Statistical challenges In Sensor Networks Jayant Gupchup, Advised by: Alex Szalay, Andreas Terzis

  2. A Typical Sensor Network Stable Storage Gateway/ Basestation ……. 3.6 V 19.0 Ah

  3. Collect-All Methodology • Nodes collect data • Basestation retrieves “All data” • In many scenarios – Wasteful • Most of the time nothing interesting is happening • More communications means more power consumption

  4. Approaches • Adapt the sampling rate • Online solution • Collect data from fewer locations during non-interesting times • Offline solution

  5. Informative location?

  6. Mutual Information

  7. Compare with random

  8. Questions

  9. Gap Filling (Connolly & Szalay)+ Original signal representation as a linear combination of orthogonal vectors • Optimization function • - Wλ= 0 if data is absent • Find coefficients, ai’s, that minimize function. + Connolly et al., A Robust Classification of Galaxy Spectra: Dealing with Noisy and Incomplete Data, http://arxiv.org/PS_cache/astro-ph/pdf/9901/9901300v1.pdf

  10. Forest Grass Summer

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