On 01-May-2004 Complexity Digest will co-sponsor a panel discussion with leading scientists on cultural factors affecting impact of science in Taiwan.(http://www.comdig2.de/conf/ntsec04)
The "shepherd" moons keep Saturn's F-ring in check
Prometheus and Pandora stabilise Saturn's narrow, ribbon-like F-ring.
But the moons may have other, chaotic effects on the F-ring - their orbits become unpredictable when they approach each other very closely.
(...)may also be responsible for features that sometimes form in the ring known as clumps and strands.