Bachelor Degree in Mathematics (Aristotle University of Thessaloniki).

Ph.D. Degree in Modelling and Simulation of Parallel Processing Systems (Aristotle University of Thessaloniki).

Research Interests

Computer Systems Modelling and Simulation, Performance Evaluation of Parallel and Distributed Systems, Multiprocessor Scheduling, Cluster Computing, Mobile Computing, Scheduling in Distributed Systems, Grid Computing, Distributed Ubiquitous Computing, High performance computing, Energy-efficient scheduling in large distributed systems and the grid, Cloud computing.

Best paper Awards

  • The Best Paper Award (Computer Systems Category) of the 2018 International Conference on Computer, Information and Telecommunication Systems (CITS 2018), Colmar, France, 11-13 July 2018.
    G. L. Stavrinides and H. D. Karatza,
    "Task Group Scheduling in Distributed Systems".
  • The Best Paper Award (Computers Category) of the 2012 International Symposium on Performance Evaluation of Computer and Telecommunication Systems, SPECTS 2012, Genoa, Italy, July 8-11, 2012.
    K. Karaoglanoglou, and H. Karatza,
    "Directing Requests and Acquiring Knowledge in a Large-Scale Grid System".
  • The Best Student Paper Award (local) of the 16th IEEE International Symposium on Computer Communications, June 28-July 1, 2011, Corfu, Greece.
    I. Moschakis and H.D. Karatza
    "Performance and Cost evaluation of Gang Scheduling in a Cloud Computing System with Job Migrations and Starvation Handling".
  • The Best Paper Award of the 10th International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS 2007), San Diego, California, 2007.
    Helen Karatza
    "Performance of Gang Scheduling Policies in the Presence of Critical Sporadic Jobs in Distributed Systems".
  • The Best Paper Award of 39th Annual Simulation Symposium (ANSS 2006), Huntsville, Alabama, 2006.
    Constandinos X. Mavromoustakis and Helen D. Karatza
    "Swarm-based Active Tunable Routing for Overhead Reduction in Multiservice networks".

Other Awards - Recognition


Undergraduate Postgraduate

Scientific Activities

Visiting Researcher

Department of Computer Science at :

  • the University of Manchester,
  • the City University of London,
  • the York University of Ontario, Canada,
  • the University of Edinburgh,
  • Arizona State University (ASU, Tempe).

Membership of Professional Societies

  • Senior Member of IEEE
  • Senior Member of ACM
  • Senior Member of SCS