Fix parameter setting in ring example (#843)
Fix parameter setting in ring example (#843)


halfflat/arbor,halfflat/arbor,halfflat/arbor,halfflat/arbor,halfflat/arbor,eth-cscs/nestmc-proto,halfflat/nestmc-proto,halfflat/nestmc-proto,halfflat/nestmc-proto,eth-cscs/nestmc-proto,eth-cscs/nestmc-proto