1. a Department of Architecture and Civil Engineering, University of Bath, Claverton Down, Bath BA2 7AY, UK
2. b Department of Social & Policy Sciences, University of Bath, Claverton Down, Bath BA2 7AY, UK
3. c Geography Department, Fourah Bay College, University of Sierra Leone, Mount Aureol, Freetown, Sierra Leone
4. d Physics Department, Fourah Bay College, University of Sierra Leone, Mount Aureol, Freetown, Sierra Leone