The Mallett design for using a rotating ring laser beam to accomplish frame dragging, a rotational gravitation effect, hopes to do so with enough to twist space and time to form what is called, "closed time-like curves", which the professor oft times describes as "stirring a simple cup of coffee". The spoon stirring the coffee is in the role of the rotating ring laser and the coffee is space and time. Mallett's plan is to introduce a neutron particle into the rotating space and try to detect it rotating as well, as a bean placed in the cup of coffee would rotate with the coffee, in order to prove that the effect is working. It has been over 10 years since Mallett's had this idea. The criticism has come in the form of Ken Olum and Allen Everett who claimed to have problems with the type of spacetime Mallett used in his analysis due to the existence of a singularity which is not the space-time normally expected if the experiment were in a previously empty space. Another objection is that the energy requirements to twist space-time sufficiently would be huge, and need a laser rotating inside a ring larger in circumference than the observable universe. Well known physicist J. R. Gott, whom Marshall recently had discussions with at the Mars Society conference in Pasadena, has stated that slowing light down in a medium, one method that Mallett has suggested that would help him get around some of Olum and Everett's objections, is not the same as lowering the constant for the speed of light in a vacuum, which is the effect that Mallett intended to achieve with his solution.
Marshall's approach is completely different. First, it's not based entirely on General Relativity, only for a description of the effects, not their cause. The cause is due to the STDTS technology he invented that produces an acceleration in the direction of motion by acting on space itself due to the gravitic effects of its electromagnetic field. This field is specially synthesized to produce this effect, not too different from the proposed specially conditioned electromagnetic fields sought by aerospace researchers Gregory Meholic and H. David Froning http://www.gettingtherefromhere.info/
Marshall will begin to release the results of his initial experiments next week. For now he is saying that there were demonstrated and video documented incidents of light seeming to bend and disappear under the influence of the rotating STDTS field, which was spinning at a speed in excess of 50 miles per hour while enveloping the blades of a high velocity fan. An expected increase in velocity was documented, caused by the activation of the STDTS field to the fan, and video signals, transmitted through the spinning fan, appeared "shredded" upon reception. These are all effects related to "torsion" or the twisting effects on space-time under extreme conditions and clearly connected to the area that Mallett is hoping to make progress. Of special significance is that Marshall is accomplishing this with low power requirements, leaving the possibility of extreme results, once different configurations and high power outputs are applied. It is estimated that the power output of the field, in the current experiments, was in the order of 50 watts. The amount of power available for large scale experiments, however, easily exceeds 28,000 watts, making the effect, that the STDTS signal could have in a torsion configuration, well within the range of what would normally be considered "science fiction". That would include the creation of closed time-like curves on a scale far exceeding anything that Mallett has proposed. Marshall calls this current version, so far, the Verdrehung Fan. "Verdrehung"
There are plans for commercial exploitation of the results of these first and future experiments, in the form of a TV special, audio documentary and book.