Loop spaces, configuration spaces and finite type invariants II

We describe finite type invariants for braids in terms of the
cohomology of bar complex of configuration spaces.
Furthermore we investigate the algebraic structure of the homology
of the loop space of orbit configuration spaces associated with
Riemann surfaces and explain how this construction is related
to the algebra of chord diagrams on surfaces. The last part is
a joint work with Fred Cohen and Miguel Xicotencatl.