Ribbon-moves of 2-knots: the Farber-Levine pairing and the   Atiyah-Patodi-Singer-Casson-Gordon-Ruberman $\widetilde\eta$-invariants of   2-knots
  Let K and K' be 2-knots. Suppose that K and K' are ribbon-move equivalent. Then the Farber-Levine pairing for K is equivalent to that for K' and the (Z-)torsion part of the first Alexander module of $K$ is isomorphic to that of K' as Z[Z] modules.   Let K be a 2-knot which is ribbon-move equivalent to the trivial knot. Then the Atiyah-Patodi-Singer-Casson-Gordon-Ruberman Q/Z-valued \widetilde\eta-invariants of K for Z_d is zero. (d is a natural number. d>2.). 
Eiji Ogasa