[Colloquium] Talk Reminder (revised)

[Dawn Ellis]

When:     Monday, March 18th  at Noon

Where:    TTIC, 6045 S Kenwood Avenue, 5th
                Floor, Room #526

Who:       Mladen Kolar, CMU

Title:      Exploring dynamic complex systems using
              time-varying networks

Abstract:

Extracting knowledge and providing insights into the complex mechanisms
underlying noisy high-dimensional data sets is of utmost
importance in many scientific domains. Networks are an example of simple,
yet powerful tools for capturing relationships among entities over time.
For example, in social media, networks represent connections between
different individuals and the type of interaction that two individuals
have.  In systems biology, networks can represent
the complex regulatory circuitry that controls cell behavior.
Unfortunately the relationships between entities are not always observable
and need to be inferred from nodal measurements.

I will present a line of work that deals with the estimation of
high-dimensional
dynamic networks from limited amounts of data.  The framework of
probabilistic graphical models is used to develop
semiparametric models that are flexible enough to capture the dynamics of
network changes while, at the same time, are as interpretable as parametric
models. In this framework, estimating the structure of the graphical model
results in a deep understanding of the underlying network as it evolves
over time.  I will present a few computationally efficient estimation
procedures tailored to different situations and provide statistical
guarantees about the procedures. Finally, I will demonstrate how dynamic
networks can be used to explore real world systems.

-- 
*Dawn Ellis*
Administrative Assistant
773-834-1757
dellis at ttic.edu

TTIC
6045 S. Kenwood Ave.
Chicago, IL. 60637
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