Geometric Interpretations of Quandle Homology
  Geometric representations of cycles in quandle homology theory are given in terms of colored knot diagrams. Abstract knot diagrams are generalized to diagrams with exceptional points which, when colored, correspond to degenerate cycles. Bounding chains are realized, and used to obtain equivalence moves for homologous cycles. The methods are applied to prove that boundary homomorphisms in a homology exact sequence vanish. 
J. Scott Carter (South Alabama), Seiichi Kamada (Osaka City), and   Masahico Saito (south Florida)