Comparison of effective collision strengths of the present ICFT R-matrix results with other (DW) results. a) Scatter plot showing the ratio () for S¹⁰⁺ at three temperature of logT_e(K) = 5.3, 6.3 and 7.3, where the DW calculation refers to the work of Landi & Bhatia (2003, LB03). The bold “ ↖ ” refers to a forbidden transition 2s²2p^2   3P₀  ←  2s²2p4p   ³P₀ transition (1–200), that is examined in panel b). b) Comparison of scaled collision strength Ω (with scaling parameter C = 2.0) of the 2s²2p^2   3P₀  ←  2s²2p4p   ³P₀ transition (1–200). AS-DW (9 and 24 models) corresponds to the present Breit-Pauli DW calculation by using autostructure with 9 and 24 configurations, corresponding to that used in the scattering and structure calculations of Landi & Bhatia (2003), respectively. (Colour online.)