• About
  • About the Department
  • Contact
  • Directions
  • Partners
  • Rooms
  • Systems & Software
  • Conduit
  • News
  • Events
  • Blog
• People
  • Our Community
  • Faculty
  • Staff
  • Grad Students
  • Ugrad Students
  • Alums
  • Directory
• Research
  • Research Links
  • Areas
  • Publications
• Degrees
  • Degree Programs
  • Doctoral
  • Masters
  • Undergrad
  • Programs
  • Miscellaneous
• Courses
  • Course List
  • Schedule
  • Sections
  • TA Program

IPP Symposium

Graph Analysis and Visualization for Brain Function Characterization Using EEG Data

Ioannis Tollis, Professor of Computer Science at the University of Crete, and Researcher at ICS-Forth

Recently, there has been an increased interest in studying the underlying neural mechanism of cognitive brain activity as well as in diagnosing certain pathologies. We study brain synchronization dynamics in terms of signal coherence. We characterize disturbances present in the functional connectivity network of schizophrenia patients and alcoholics. Graph theoretical measures and visualization provide the tools to study the "disconnection syndrome" as proposed for schizophrenia. Furthermore, we present a graph statistical parameter that attempts to capture and quantify collective motifs present in the functional brain networks in alcoholic subjects. (Joint work with V. Tsiaras and E. Sakkalis)

Dr. Ioannis (Yanni) G. Tollis is a Professor of Computer Science at the University of Crete, and the Institute of Computer Science at FORTH (ICS-FORTH), where he was the head of the Biomedical Informatics Laboratory (BMI lab.) 2005-2010. He received his Ph. D. degree in Computer Science from the University of Illinois at Urbana-Champaign in Jan. 1988. He received his Diploma degree in Mathematics from the National University of Athens, Greece and his M. S. degree in Computer Science from Vanderbilt University, Nashville, Tennessee. He joined the faculty of The University of Texas at Dallas in December 1987, where he was a Professor of Computer Science until 2004. He has published eight books, over 160 journal and conference papers, and has given more than 60 invited lectures worldwide. His research interests are in the Discovery, Design, Analysis, and Visualization of Networks, Modeling and Visualization of Biomedical Data and Networks, Graph Drawing, Information Visualization and Data Analytics, and Algorithms and Applications. His research has been funded by numerous funding agencies and companies. He has a U.S. patent and several of his projects have been licensed by companies for commercial distribution. He is editor-in-chief of the electronic Journal of Graph Algorithms and Applications, a member of the Editorial Board, Journal of Healthcare Engineering, 2010-present, Journal of Discrete Mathematics 2012-present, and ISRN Combinatorics, 2012-present. He was a member of the editorial board of the IEEE Transactions on Computers (2000-2004. He has served as a member of program committees of several international conferences, most recently, the 1st Conference on the Virtual Physiological Human, 2010 (VPH 2010), HEALTHINF 2012, and HEALTHINF 2013.