Applied Mathematics Colloquium

Dr. Randy Paffenroth, Numerica Corporation

Location

Mathematics/Psychology : 104

Date & Time

February 21, 2014, 12:00 pm1:00 pm

Description

Title:  Space-time signal processing for distributed pattern detection
in sensor networks

Abstract:  In this talk we will present theory and algorithms for
detecting weak, distributed patterns in large scale network data.  The
patterns we consider are anomalous temporal correlations between
signals recorded at sensor nodes across a network.  We use robust
matrix completion and second order analysis to detect distributed
patterns that are not discernible at the level of individual sensors.
When viewed independently, the data at each sensor cannot provide a
definitive determination of the underlying pattern, but when fused
with other sensors the relevant patterns emerge.  The approach has
been applied to several domains, including financial analytics, crime
analytics, and chemical detection, where correlated phenomena are of
interest.  Our focus in this talk will be on detecting weak patterns
in computer networks where the nodes (terminals, routers, servers,
etc.) are sensors that provide measurements (of packet rates, user
activity, CPU usage, etc.). Further, we demonstrate how these methods
can be efficiently implemented and applied to large distributed
databases.

Location:  Math/Psych 104