  We propose a new Kaluza-Klein reduction scheme based on ADM decomposition.
The scheme has been motivated by AdS/CFT, especially by how the worldvolume
theory should appear from the supergravity side. We apply the scheme to IIB
supergravity reduced on a 5D hyperboloidal $\cH^5$ space, and show that an
(A)dS "braneworld" is be realized after further reduction to 4D. We comment on
applications to cosmology and black hole physics. In particular, the scheme
should provide a proper paradigm for black hole physics.
