You must read attached document to understand how new world of big data emerged, and what kind of dramatic changes it has caused in BI and DWH arena. Writers are very important and knowledgeable academicians,helped companies like Greenplum, Platfora etc. Please respect the writers' right and mention their name. you can find original document at following link :http://databeta.wordpress.com/2009/03/20/mad-skills/
