edited by B. Bertotti and F. de Felice and A. Pascolini ;sponsored by the International Society on General Relativity and Gravitation. edited by J. M. Bennett and T. Pearcey ; sponsored by the International Council for Computer Communication. edited by B. K. Chakraverty and D. Kaplan ; sponsored by the International Union of Pure and Applied Physics. edited by B. K. Chakraverty and D. Kaplan ; sponsored by the International Unions of Pure and Applied Physics.