Please be advised that Web of Science will undergo scheduled maintenance on Saturday December 13 2014, to release new search functionality in the WoS version 5.16 release. During this time, access may be intermittent. Thomson Reuters apologise for any inconvenience this may cause.
Detailed release notes for version 5.16 are can be found at
http://wokinfo.com/media/pdf/wos_release_516.pdf