NDLI: Cost-effective outbreak detection in networks

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Cost-effective outbreak detection in networks

Content Provider	ACM Digital Library
Author	Leskovec, Jure Glance, Natalie VanBriesen, Jeanne Krause, Andreas Faloutsos, Christos Guestrin, Carlos
Abstract	Given a water distribution network, where should we place sensors toquickly detect contaminants? Or, which blogs should we read to avoid missing important stories?. These seemingly different problems share common structure: Outbreak detection can be modeled as selecting nodes (sensor locations, blogs) in a network, in order to detect the spreading of a virus or information asquickly as possible. We present a general methodology for near optimal sensor placement in these and related problems. We demonstrate that many realistic outbreak detection objectives (e.g., detection likelihood, population affected) exhibit the property of "submodularity". We exploit submodularity to develop an efficient algorithm that scales to large problems, achieving near optimal placements, while being 700 times faster than a simple greedy algorithm. We also derive online bounds on the quality of the placements obtained by any algorithm. Our algorithms and bounds also handle cases where nodes (sensor locations, blogs) have different costs. We evaluate our approach on several large real-world problems,including a model of a water distribution network from the EPA, andreal blog data. The obtained sensor placements are provably near optimal, providing a constant fraction of the optimal solution. We show that the approach scales, achieving speedups and savings in storage of several orders of magnitude. We also show how the approach leads to deeper insights in both applications, answering multicriteria trade-off, cost-sensitivity and generalization questions.
Starting Page	420
Ending Page	429
Page Count	10
File Format	PDF QT / MOV
ISBN	9781595936097
DOI	10.1145/1281192.1281239
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2007-08-12
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Sensor placement Submodular functions Graphs Information cascades Virus propagation
Content Type	Video Text
Resource Type	Article

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