subject of doctorat

i prepare the doctorat in BI , i search an subject for obtention doctorat on Datawarehouse ,
but there isn't a recent paper and actualite problems in WEB
if any one can help me for found doc or paper thanks

I would research MapReduce, Hadoop, and Data Warehousing in the cloud (if I had the time or loads of dosh).

I should have added some links:

Books on Hadoop and MapReduce:

http://www.amazon.com/gp/product/0596521979?ie=UTF8&tag=busineintellq-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=0596521979
http://www.amazon.com/gp/product/1430219424?ie=UTF8&tag=busineintellq-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=1430219424
http://www.amazon.com/gp/product/0521865719?ie=UTF8&tag=busineintellq-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=0521865719

The original MapReduce paper

http://labs.google.com/papers/mapreduce.html

DW in cloud and MapReduce in an RDBMS

http://www.asterdata.com/index.php

Hadoop

http://hadoop.apache.org/core/