Let me work in the large-warped Randall-Sundrum D-brane scenario and consider how an orbifolding leads to a non-singular cosmic bounce on the brane thus alleviating the rip of the big-bang singularity. The Randall-Sundrum 5-D braneworld action is:

the 5-D Planck mass, , and the cosmological constant in the bulk, yielding the metric on the brane:

with being the radius of AdS, defined by:

thus allowing us to derive the CFT-brane relation:

where the dynamics of N-parallel topologically intersecting Dp-branes with gauge group is:

with the Yang-Mills potential