To address the aim, each chapter author presented a 10-minute summary of his chapter. This was followed by a five-minute critique by an invited discussant. Comments were invited from the floor for a further 15-minute period. Professor Gary May provided an overview of research in this area at the end of the workshop. The workshop was opened by an invited chair, Professor A.P. Sakis Meliopoulos of the Georgia Institute of Technology. Professor Meliopoulos offered final concluding remarks.