The SCUBA half-degree extragalactic survey - I. Survey motivation, design and data processing - Mortier, A; Serjeant, S; Dunlop, J; Scott, SE; Ade, P; Alexander, D; Almaini, O; Aretxaga, I; Baugh, C; Benson, A; Best, P; Blain, A; et al. (2005)