About the Authors

Robert Gittins is a final-year Ph.D. student at the University of Wales Bangor, School of Informatics, Dean Street, Bangor, UK, LL57 1UT. Robert can be reached at the e-mail address [e-mail].

Sian Hope is a senior lecturer at the University of Wales Bangor, School of Informatics, Dean Street, Bangor, UK, LL57 1UT, and can be reached at the e-mail address [e-mail].

Ifor Williams is senior development manager at SECURETRADING, Parc Menai, Bangor, Gwynedd, UK. His e-mail address is [e-mail].