Dr. Bernard Butler, Research Fellow

Dr. Bernard Butler profile picture
Dr. Bernard Butler
Research Fellow
Ph: +353 (0)51 845695
Email: bbutler@tssg.org

Personal Summary

Currently I am a Research Fellow in TSSG, Waterford Institute of Technology, working in the CONNECT centre (http://connectcentre.ie/), particularly on the Intel Workplan relating to the optimisation of services for virtualised heterogeneous networks and of networks for distributed, composed microservices, specifically applied to Intelligent Transport Systems (ITS).

Previous TSSG experience (since 2006):

  • Visiting Researcher at Amadeus S.A, Sophia Antipolis, France – modelling and visualizing transaction trees in a busy data centre
  • Senior researcher – Performance and security in composed web services (2010-2012) (http://www.tssg.org/portfolio/aniketos/), integrated communications (2010-2014) (http://www.tssg.org/portfolio/fame/) and access control performance prediction (2014-2015 (http://www.tssg.org/projects/atlas/).
  • Senior Researcher – Future Internet topology modelling (2009-2010): project: 4WARD
  • KDD (Knowledge Discovery in Databases) Group leader at TSSG (2007-2009); projects: SCA, SWAGGER, SaaSiPA
  • Product Centre manager – Digital Multimedia Services (2006-2007); project: IMPULSE

Previous experience included:
- Senior Business Systems Analyst at Sun Life Financial (http://www.sunlife.com/).
- Senior Consultant/Data Warehouse Architect at Client Solutions ( http://www.as.techdata.eu/clientsolutions/).
- Principal Research Scientist at the Scientific Software Section, National Physical Laboratory (NPL), UK (http://www.npl.co.uk).

Current Activities / Research Interests

  • Access and usage control – particularly non functional aspects such as performance
  • Knowledge engineering and information management
  • Data science: statistics; databases, particularly NoSQL and NewSQL; distributed architectures
  • Monitoring and problem mitigation in high-volume data centres
  • Caching in distributed computing
  • Given my ongoing interest on system performance and modelling, I have been looking at the research challenges of the Internet of Things, particularly in relation to its use as a distributed sensing and computing platform.

    I am also interested in privacy-preserving data mining, particularly in the health informatics (notably: aggregation of data from sensors) and financial (notably: extending the reach of enterprise analytics to drive better customer engagement) sectors.



Selected Publications
• Bernard Butler and Brendan Jennings. Measurement and Prediction of Access Control Policy Evaluation Performance. IEEE Transactions on Network and Service Management, Vol. 12 Issue 4, pages 526 – 539. IEEE, 2015.
• Leigh Griffin, Bernard Butler, Eamonn de Leastar, Brendan Jennings, and Dmitri Botvich. On the Performance of Access Control Policy Evaluation. In 2012 IEEE International Symposium on Policies for Distributed Systems and Networks, pages 25–32. IEEE, 2012.
• Bernard Butler, Brendan Jennings, and Dmitri Botvich. An experimental testbed to predict the performance of XACML Policy Decision Points. In IM 2011 – TechSessions, Dublin, Ireland, May 2011.
• B. Butler, B. Jennings, and D. Botvich. XACML policy performance evaluation using a flexible load testing framework. In Proceedings of the 17th ACM conference on Computer and communications security, pages 648–650. ACM, 2010.
• Bernard Butler. Tools and Techniques used in mining Customer Data—Lessons for Metrology. In M.G. Cox, editor, Proceedings of the Joint BIPM-NPL Workshop on the Impact of IT in Metrology, NPL, Teddington, UK,
16–19 September 2002. Invited paper.
• M. Bartholomew-Biggs, B.P. Butler, and A.B. Forbes. Optimisation algorithms for generalised distance regression in metrology. Series on Advances in Mathematics for Applied Sciences, 53:21–31, 2000
• B. Butler, M. Cox, A. Forbes, S. Hannaby, and P. Harris. A methodology for testing classes of approximation and optimisation software. In Proceedings of the IFIP TC2/WG2.5 working conference on Quality of numerical software: assessment and enhancement, pages 138–151. Chapman & Hall, Ltd., 1997.
• G.T. Anthony, H.M. Anthony, B. Bittner, B.P. Butler, M.G. Cox, R. Drieschner, R. Elligsen, A.B. Forbes, H. Groß, S.A. Hannaby, P.M. Harris, and J. Kok. Reference software for finding chebyshev best-fit geometric elements. Precision Engineering, 19:28–36, 1996.

Academic Supervision

4 PhD students (3 current, one starting soon), 5 MSc students (1 current).


UCC: BSc Applied Maths and Computing; MSc Applied Maths
Kingston University (UK): Postgrad Diploma in Management Studies
WIT: MSc Communications Software
WIT: PhD “Access Control System Specification and its Implications
for Performance“