Paper on Dynamics of an Earth Ring

Here is a short paper in which I make an argument that any ring system
around the Earth could not remain dynamically stable for long in the
complex Earth-Moon-Sun interactive environment:-

http://uk.geocities.com/aa_spaceagen...-dynamics.html

However.... some experts appear to suggest that such an "Earth ring"
could perhaps have existed for thousands of years, causing climatic
effects on the Earth, as revealed he

http://www.sandia.gov/news-center/ne...ringworld.html

I wonder if anyone here has any views on this, or if there's some
other factor that I ought to have taken into account in my analysis?

AAI