28 October 2009 ScienceDirect online content will be unavailable due to scheduled maintenance for approximately 9 hours from 6:00 PM PDT Saturday, October 31 to 2:00 AM PST Sunday, November 1. Please share this information with your colleagues. Jayne Dickson CDL Information Services California Digital Library University of California 510.987.0550 [log in to unmask] <mailto:[log in to unmask]>