1. Siemens Industry Software Limited, 200 Shepherds Bush Road, London W6 7NL, UK
2. Department of Mechanical & Aerospace Engineering, University of Strathclyde, Glasgow G1 1XJ, UK
3. School of Aerospace, Mechanical & Mechatronic Engineering, The University of Sydney, Sydney, Australia
4. University of Nicosia, Nicosia CY-2417, Cyprus