As a condition of publication, copyright of this work has been transfered to IEEE. They require the following notices:
This work is copyright © 2000 IEEE. Personal use of this material is permitted. However, permission to to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
This work is also copyright © 2000 Brian D. Winters and Alan J. Hu. All rights reserved.