Home Education Research Teaching & Admin Contact

Research Interests
Middleware for large-scale distributed systems, including mobile and pervasive computing systems, and cloud computing systems. In particular, trust management in service-oriented architectures, situation-awareness in ubiquitous computing, and self-protection in autonomic systems.
Current Research

I am a member of the Software Systems Group.

Research in Computer Security and Digital Forensics.
The various aspects of the work are described here.

Research Activities
Complete list of publications.
"The Future of Enterprise Groupware Applications" - Best Student Paper - First International Conference on Enterprise Information Systems.
Past Research
  • Research in Trust Management in Global Computing Systems

  • This work took place primarily as part of the EU IST FET Project SECURE (Secure Collaboration among Ubiquitous Roaming Entities). The project investigated the design of dynamic and self-configuring security mechanisms that are appropriate for global computing based on the human notion of trust. I was a co-investigator in SECURE leading the scientific work at the University of Strathclyde. Our main focus was the development of a model for trust-based collaboration. Our model is presented in the paper titled "Trust Lifecycle Management in a Global Computing Environment".
    Within the same area of work was also our participation to iTrust the EU Thematic Network on Trust Management in Dynamic Open Systems. I was the scientific person in charge of the University of Strathclyde participation, as part of which in September 2002 we organised the First iTrust Workshop.
    In addition to the SECURE project, work in this area was also supported by a grant from The Nuffield Foundation under their Undergraduate Research Scheme that adapted the GridSim simulator to support experimentation with trust-based resource allocation schemes. I was the principal investigator and academic supervisor of the research student.
    This work was also supported by an International Travel Grant from the Royal Academy of Engineering that supported my attendance of the 4th International Conference on Trust Management to present the paper Gathering Experience in Trust-Based Interactions.

  • Research in Software Components for Context-aware Applications

  • This work involved the development of the Strathclyde Context Infrastructure (SCI) for the collection and management of contextual information, and the development of techniques for the identification of situations to support contextual adaptation.

  • Research in Component Software and Business-to-Business E-Commerce

  • This work aimed to provide the technology infrastructure and management tools to enable dynamic business-to-business E-Commerce. It included an investigation of the impact of the Virtual Enterprise model for business organisations. It also included an investigation of how techniques from open distributed systems, and service trading in particular, can be used in the construction of a component oriented development framework in order to provide the necessary flexibility and dynamism required by Enterprise Systems. This part of the work is the topic of My Ph.D. thesis, which introduces A Component Type Model for Semantically Enhanced Component Trading.
    The work started in November 1997 at the Distributed Systems Group in the School of Computer Science and Statistics of the University of Dublin, Trinity College under the Virtues Project.

  • Research in Digital Libraries

  • This work involved the study of Performance Monitoring, Load Balancing and Dynamic Adaptation of Timeouts in Digital Library Systems. It included the implementation of a performance monitor for digital library systems. A demo of the performance monitor was presented in the 1st European Conference on Research and Advanced Technology for Digital Libraries, Pisa, Italy, in September 1997. It also included the implementation of a load balancing prototype based on DIENST (the digital library system of the Networked Computer Science Technical Report Library, developed at Cornell University) and a performance study of the DIENST system. Finally, it included the implementation of a framework for pricing and charging in digital libraries. The design of the framework is presented in the article Economic Framework for Pricing and Charging in Digital Libraries, J. Sairamesh, C. Nikolaou, D. Ferguson, Y. Yemini, D-Lib Magazine, February 1996. A demo of the system was presented at the "NCSTRL Workshop" of 5th International World Wide Web Conference, Paris, France, May 1996. My M.Sc. thesis Performance Monitoring in Digital Library Systems, supervisor Prof. C. Nikolaou and supervising researcher Dr. S. Kapidakis was part of this work.
    This work was done from October 1995 until September 1997, while I was working as a research assistant at the PLEIADES - Parallel & Distributed Systems Group at the Computer Science Institute of the Foundation for Research and Technology Hellas (FORTH).

  • Research in Performance Tools for Distributed Systems and Information Economies

  • This work involved the design and implementation of a simulator of microeconomic models for resource allocation and load balancing in distributed transaction processing systems. The simulator was built as an extension to the TPsim simulator for distributed database systems and On-Line Transaction Processing (OLTP) systems. The work was part of my B.Sc. thesis Extensions on the distributed transaction processing systems simulator TPsim for the simulation of microeconomic models for resource allocation and load balancing supervised by Dr. S. Kapidakis.
    This work was done from July 1994 until September 1995, while I was working as a research student at the PLEIADES - Parallel & Distributed Systems Group of the Computer Science Institute of the Foundation for Research and Technology Hellas (FORTH), and was funded by the LYDIA project.

Last modified: Monday, January 28, 2013