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New England Database
Society sponsored by Sun Microsystems |
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NEDS |
Handling Uncertainty in Sensor Databases
Sunil Prabhakar
Purdue
University
Friday, March 25, 2005, 4:00
PM
Volen 101, Brandeis
University
(preceded by a wine and cheese reception at 3:00 pm)
Abstract:
Sensor databases handle large volumes of constant updates to data received at a central site from numerous sensing devices. Due to physical limitations of the sensing devices and resource limitations (e.g. battery power and bandwidth) it is infeasible for the databases to accurately reflect the exact status of the sensed environment at all times. Answering queries based upon this inaccurate "cache" of the real world can lead to incorrect results. In this talk we present our work on handling this inherent uncertainty in data to provide correct, albeit a little more vague, answers to queries. Our ideas are based upon a probabilistic modeling of data uncertainty and probabilistic queries. In this talk, we present our model of uncertainty, a classification of probabilistic queries, metrics for query quality, indexing techniques for uncertain data, and some details of a prototype implementation. Time permitting, we will also summarize our related work on indexing data for high update environments such as sensor databases.
Speaker Bio:
Sunil Prabhakar is an Associate Professor of Computer Sciences at Purdue University. He received the Bachelor of Technology in Electrical Engineering from the Indian Institute of Technology, Delhi in 1990, and M.S. and Ph.D. in Computer Science from the University of California, Santa Barbara in 1998. Dr. Prabhakar's research interests are in moving objects and sensor databases, digital right's management and privacy for databases, and bioinformatics. His research has been supported by the NSF, Microsoft Corp., IBM Corp., and the Center for Education and Research in Information Assurance and Security (CERIAS) at Purdue University. Dr. Prabhakar is a recipient of the NSF CAREER award. He is a member of ACM, a senior member of the IEEE, a member of the editorial board for the Distributed and Parallel Databases Journal and has been a member of the Editorial Board for the Journal of Database Management.
Maintained by Dina Goldin dqg AT cse.uconn.edu