List of Figures

	Figure 1: A pure shell
	Figure 2: Multi-peaks of ball configurations, $L0 = 0$
	Figure 3: Multi-peaks of a shell
	Figure 4: $(R, M )$ spiral for $k = 0, l = 10.5, L0 = 0, 0.01 ≤ y(0) ≤ 0.99$
	Figure 5: $k = 0,l = 0,L0 = 0.1$
	Figure 6: $k = 0,l = 3∕2,L0 = 0.1$
	Figure 7: $Zc = 0.47, Eb = 0.04, A = 0.99, T = 90.0$