Simulation
tests scaling of Rc
Tao Liang and TW
R
h
Rc
Rp
Triangular lattice of
springs
+ bending springs between triangles
F
Vary R, h, pushing
force F.
Measure Rc
i)Directly
ii) 
Inferred from force F
Inferred from force FÞ Rc ~
R.6±.1 h.3±.1
É not R0
unresolved puzzle