  We calculate the effective forces on hard disks near walls embedded inside
active nematic liquid crystals. When the disks are sufficiently close to the
wall and the flows are sufficiently slow, we can obtain exact expressions for
the effective forces. We find these forces and the dynamics of disks near the
wall depend both on the properties of the active nematic and on the anchoring
conditions on the disks and the wall. Our results show that the presence of
active stresses attract planar anchored disks to walls if the activity is
extensile, and repel them if contractile. For normal anchored disks the reverse
is true; they are attracted in contractile systems, and repelled in extensile
ones.
