Because loop quantum gravity model universes, space gravity theories are contenders to build and answer unification theory; the Lorentz invariance helps grade the spread of universal features throughout a proposed multiverse in time.
32.
Among these, price level and exchange rate variables have been shown to have a relationship in the gravity model that accounts for a significant amount of the variance not explained by the basic gravity equation.
33.
In his work treating adolescents with problem sexual behaviors ( PSB ), he has been able to show that a basic orbits-gravity model allows us to unravel the puzzling nature of the approach.
34.
While the model s basic form consists of factors that have more to do with geography and spatiality, the gravity model has been used to test hypotheses rooted in purer economic theories of trade as well.
35.
The paper also described two simplified versions of the system, IGP4 which used a simplified drag model, and SGP4 ( Simplified General Perturbations ) which used IGP4's drag model along with a simplified gravity model.
36.
In the middle of the 20th century, researchers such as the American astrophysicist John Q . Stewart and Swedish geographer Reino Ajo, who showed that the spatial distribution of social interactions could be described using gravity models.
37.
Later the " Joint Earth Gravity Models " denoted " JGM-1 ", " JGM-2 ", " JGM-3 " developed by Goddard Space Flight Center in cooperation with universities and private companies became available.
38.
Various analyses with the pre-CHAMP / GRACE JGM-3 and EGM96 Earth gravity models were performed by Ciufolini et al . over observational time spans of some years ( Ciufolini et al . 1996; 1997; 1998 ).
39.
The gravity model was expanded by William J . Reilly in 1931 into Reilly's law of retail gravitation to calculate the breaking point between two places where customers will be drawn to one or another of two competing commercial centers.
40.
The simple Newtonian gravity model expressed by the equation above can be viewed as an approximation to general relativity, that only works well under a certain set of circumstances . talk ) 17 : 51, 17 January 2012 ( UTC)
