I am a third year PhD student at the University of Pennsylvania, Department of Electrical and Systems Engineering, where I am working with Ali Jadbabaie, George Pappas and Rakesh Vohra.  Here is a link to my Google Scholar profile.

  • Research Interests

My research interests lie on the analysis of networked dynamical systems and game theory.  Descriptive keywords: Social Networks, Information Diffusion, Product Adoption; Learning; Actuator/Sensor Placement in large-scale Networked Systems; Neural Networks.

Tools that I use come from automatic control; game theory; optimization and probability theory; linear algebra.

  • Journal Publications
    1. V. Tzoumas, M. A. Rahimian, G. J. Pappas and A. Jadbabaie. Minimal Actuator Placement with Bounds on Control Effort. Accepted for publication in IEEE Transactions.
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  • Conference Publications
    1. V. Tzoumas, M. A. Rahimian, G. J. Pappas and A. Jadbabaie. Minimal Actuator Placement with Optimal Control Constraints. IEEE American Control Conference (ACC), to appear, July 2015.
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    2. V. Tzoumas, C. Amanatidis, and E. Markakis. A Game-Theoretic Analysis of a Competitive Diffusion Process over Social Networks, 8th Conference on Web and Internet Economics (WINE), December 2012.

      We consider a non-cooperative simultaneous game among firms that promote their product over a network by choosing appropriate seeds.  We focus on various questions regarding the pure strategy Nash equilibria of these games, including their efficiency. Check our full version for all missing proofs and extra results.
  • Other Academic Experience
  • Teaching
  1. Teaching Assistant for the graduate course Linear Optimization (ESE504) offered by Ali Jadbabaie (Fall 2013).
  2. Teaching Assistant for the graduate course Linear Systems (ESE500) offered by Michael Carchidi (Fall 2014).
  • Reviewer for: WINE, WWW, EC, TAMC,  TAC, TNSE, ACC, GlobalSIP.
  • Education
  • University of Pennsylvania, Philadelphia, USA

Ph.D. Candidate, September 2012-present, Department of Electrical and Systems Engineering.
Advisors: Ali Jadbabaie, George Pappas.

  • National Technical University of Athens, Athens, Greece

Diploma (5-year B.Sc. degree with thesis) in Electrical and Computer Engineering, 2005-2012.
Thesis: A Game-Theoretic Analysis of a Competitive Diffusion Process over Social Networks.
Advisors: Evangelos Markakis, Trifon Koussiouris.
GPA: 9.54/10 (top 1.5%)

  • Other Activities

I am a runner.  I also enjoy mountaineering and practicing Kendo.