2,797 research outputs found
The Robertson-Walker Metric in a Pseudo-Complex General Relativity
We investigate the consequences of the pseudo-complex General Relativity
within a pseudo-complexified Roberston-Walker metric. A contribution to the
energy-momentum tensor arises, which corresponds to a dark energy and may
change with the radius of the universe, i.e., time. Only when the Hubble
function does not change in time, the solution is consistent with a
constant .Comment: 31 pages, 2 figure
Design and evaluation of a cockpit display for hovering flight
A simulator evaluation of a cockpit display format for hovering flight is described. The display format is based on the position-velocity-acceleration representation (PVA) similar to that used in the Pilot Night Vision System in the Army AH-64 helicopter. By only varying the nature of the display law driving the primary indicator in the PVA format, i.e., the acceleration symbol, three candidate displays are created and evaluated. These range from a Status display in which the primary indicator provides true acceleration information to a Command display, in which the primary indicator provides flight director information. Simulation results indicate that two of the three displays offer performance and handling qualities which make them excellent candidates for future helicopter cockpit display systems
- …