LUYF is a joint project with Katalin Szlavecz from JHU Department of Earth and Planetary Sciences and Alex Szalay from JHU Department of Physics & Astronomy. The purpose of the project is to use WSNs to study the environmental conditions which affect soil respiration with fine spatial and temporal resolution.
Life Under Your Feet is built for long-term data collection. It has loose data latency requirements, but places a high value on data-recovery rates and long sensor lifetimes. To this end, we use Koala, a reliable data retrieval system which operates at low radio duty cycles, typically on the order of a few percent. Koala achieves this by using Low Power Probing (LPP) to allow the network's nodes to spend the vast majority of their time with the radio off. Koala periodically wakes up the entire network to download the data that nodes have collected and stored locally, then return it to its sleeping state.
In the field, we have had nodes that survive for up to 2 years without battery replacement. Recently, we have incorporated the Phoenix timestamp reconstruction system to increase data usability and data compression to reduce storage and transfer requirements.
We have carried out several long-term deployments in the Baltimore area, as well as shorter deployments in the Atacama desert in Chile, Yasuni National Park in Ecuador, and in the Atlantic coastal rainforest of Brazil.
- A. Terzis, R. Musaloiu-E., J. Cogan, K. Szlavecz, A. Szalay, J. Gray, S. Ozer, C.-J. M. Liang, J. Gupchup, R. Burns, Wireless Sensor Networks for Soil Science. Special issue of the International Journal on Sensor Networks on Environmental Sensor Networks. Volume 7 No 1/2, Pages 53-70, February 2010. PDF
- Jayant Gupchup, Doug Carlson, Razvan Musaloiu-E., Alex Szalay, Andreas Terzis, Phoenix: An Epidemic Approach to Time Reconstruction. Appeared in the proceedings of the 7th European Conference on Wireless Sensor Networks (EWSN 2010). PDF. Talk (MP4)
- Qiang Wang, Alex Szalay, Andreas Terzis, A Novel Soil Measuring Wireless Sensor Network. In proceedings of the IEEE International Instrumentation and Measurement Technology Conference. May 3-6, 2010. Austin, Texas. PDF
- Jayant Gupchup, Razvan Musaloiu-E., Alex Szalay, Andreas Terzis. Sundial: Using Sunlight to Reconstruct Global Timestamps. Appeared in the proceedings of the 6th European Conference on Wireless Sensor Networks (EWSN 2009). PDF
- R. Musaloiu-E, C.-J. M. Liang, A. Terzis. Koala: Ultra-Low Power Data Retrieval in Wireless Sensor Networks. In the Proceedings of IPSN 2008. PDF
- Raluca Musaloiu-E., Razvan Musaloiu-E., Andreas Terzis. Gateway Design for Data Gathering Sensor Networks. In the Proceedings of SECON 2008. PDF
- Jayant Gupchup, Abhishek Sharma, Andreas Terzis, Randal Burns, Alex Szalay. The Perils of Detecting Measurement Faults in Environmental Monitoring Networks. Appeared in DCoSS 2008 (Invited Paper). PDF
- Jayant Gupchup, Andreas Terzis, Randal Burns, Alex Szalay. Model-Based Event Detection in Wireless Sensor Networks. Appeared in the Proceedings of the Workshop for Data Sharing and Interoperability on the World Wide Web (DSI 2007). April 2007.
- R. Burns, A. Terzis, M. Franklin, Design Tools for Sensor-Based Science. Appeared in Proceedings of EmNets 2006.
- R. Musaloiu, A. Terzis. K. Szlavecz, A. Szalay, J. Kogan, J. Gray, Life Under your Feet: A Wireless Soil Ecology Sensor Network. Appeared in Proceedings of EmNets 2006. PDF
- S. Ozer, J. Gray, A. Szalay, A. Terzis, R. Musaloiu, K. Szlavecz, R. Burns, J. Cogan, Data Analysis Tools for Sensor-Based Science, Extended Abstract. Appeared in the Proceedings of the Fourth International Conference on Embedded Networked Sensor Systems (SenSys 2006).