Preface -- Table of contents -- Highlights of Dijen Ray-Chaudhuri's research -- On the p-ranks of GMW difference sets -- Characterization of maximal rational circulantassociation schemes -- Face-regular polyhedra and tilings with twocombinatorial types of faces -- Geometry, codes and difference sets:exceptional connections -- A singular direct product for bicolorableSteiner triple systems -- On semi-regular relative difference setsin non-abelian p-groups -- Every λ-design on 6p + 1 points is type-1 -- An introduction to balanced network flows -- On the λ-design conjecture for v = 5p + 1 points -- On a class of twin balanced incomplete block designs -- Decoding some doubly-even self-dual [32, 16, 8] codesby hand -- On the maximum size of a hole in an incomplete t-wisebalanced design with specified minimum block size -- On a family of cocyclic Hadamard matrices -- A mass formula for Type II codes over finite fieldsof characteristic two -- A posteriori probability decoding through the discreteFourier transform and the dual code -- Subdesigns of symmetric designs -- Linear codes over F2 + uF2 and their completeweight enumerators -- On single-deletion-correcting codes -- Critical problems in finite vector spaces -- Existence of Steiner systems that admit automorphismswith large cycles -- Rainbow graphs.