1 Department of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK sak36@hermes.cam.ac.uk.
2 Department of Engineering and Applied Science, Aston University, Aston Triangle, Birmingham B4 7ET, UK.
3 Computational Science, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands National Research University ITMO, Kronverkskiy Prospekt 49, 197101 St Petersburg, Russia.
4 Computer Science Department, University of Geneva, 1211 Geneva 4, Switzerland.
5 Centre for Computational Science, University College London, 20 Gordon Street, London WC1H OAJ, UK.