Gravitational offsetting
Gravitational offsetting (GO) is the technology of creating a permanent weightless environment in a highly gravitational location such as the surface of the Earth using mass counterbalancing.
GO gives the effect of anti-gravity without being such. It is often confused with Anti-gravity and particularly Gravitational Shielding, which it is not. Gravitational shielding violates the equivalence principle of the general theory of relativity, while gravitational offsetting uses General Relativity to achieve the desired effect.
Briefly, GO uses a large mass directly above the GO chamber to offset the mass of the Earth, particularly the foci of the Earth's center of mass 4000 miles beneath the Earth's surface. Such an offsetting mass need be far less than Earth's mass yet still heavy enough to achieve weightlessness at the center of the GO chamber.
Studies in GO are just beginning in 2008 and will be updated as they are approved by peer review.