Jayant GupchupGraduate student,

Johns Hopkins University

Representative Slides

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

Environmental Monitoring

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

Cub Hill [Dec 2008 to Sep 2009]

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

Research and Roles

Manage data collected by our sensors Provide online access to data and graphs to scientists http://dracula.cs.jhu.edu/luyf/en/tools/VZTool/

Research – I: Time synchronization and validation of measurements

Research – II: Exploit spatial and temporal correlation to Fault detection and gap filling Optimize data collection subsystem

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

Grazor System

Available Online Right now!!!

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

Timestamp Validation: Annual Solar Patterns

<LOD, noon> = f (Latitude, Time of Year)

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

Soil Temperature Dataset [noisy + gappy]

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

Robust Reconstruction [Clustering+PCA+Regression]

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

Top 10 Locations

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

Reconstruction Error vs Locations

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

Questions

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

Life Under Your Feet [LUYF]

[LUYF] : http://www.lifeunderyourfeet.org/

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

System Architecture [eScience 2008]

[eScience 08] : Microsoft eScience Workshop 2008, Indianapolis

Jayant Gupchup, Johns Hopkins University http://www.cs.jhu.edu/~gupchup

“Time Reconstruction: Sundial” [EWSN 09]

Length of day (LOD)

Noon

Local Noon Global Noon

Lts 1 Gts 1

Lts 2 Gts 2

… …

… …

Lts n Gts n

“Anchor Points”

argmax lag Xcorr (LOD lts, LOD gts, lag)

[EWSN 09] : European Conference on Wireless Sensor Network 2009, Ireland