Figure 8.

The ratio n_(ɛ≥0.05)/N, and the ratio of the number of aggregated points n_agg to the number of initial aggregated points $n_{\mathrm{agg}}^0$ ($n_{\mathrm{agg}}/n_{\mathrm{agg}}^0$) as a function of ɛ_z for (a) k^A = 0.2 × 10⁻³ N m⁻¹, (b) k^A = 2 × 10⁻³ N m⁻¹ and (c) k^A = 20 × 10⁻³ N m⁻¹, respectively (M ± s.d., $\mathcal{N}=10$).