Introduction
This work was supported in part by the U.S. Department of
Energy under Contract No. DE-AC02-76SF00515.
This document, and the material and data
contained therein, was developed under sponsorship of the United States
Government. Neither the United States nor the Department of Energy, nor the
Leland Stanford Junior University, nor their employees, nor their respective
contractors, subcontractors, or their employees, makes any warranty, express
or implied, or assumes any liability of responsibility for accuracy,
completeness or usefulness of any information, apparatus, product or process
disclosed, or represents that its use will not infringe privately owned
rights. Mention of any product, its manufacturer, or suppliers shall not, nor
is it intended to, imply approval, disapproval, or fitness of any particular
use. A royalty-free, nonexclusive right to use and disseminate same for any
purpose whatsoever, is expressly reserved to the United States and the
University.