Associate Professor Ramesh Sitaraman's research on an energy-efficient cloud system is described in the following:
Batteries should be part of the Internet Infrastructure
http://gigaom.com/cleantech/batteries-should-be-part-of-the-future-of-internet-infrastructure/
Batteries Included: A Leaner and Greener Internet using Smart Batteries
https://blogs.akamai.com/2012/10/batteries-included-a-leaner-and-greener-internet-using-smart-batteries.html
The Internet goes green
http://www.umass.edu/researchnext/internet-goes-green
Two of Sitaraman's publications related to green and sustainability of the Internet can be downloaded:
Using Batteries to Reduce the Power Costs of Internet-scale Distributed Networks,
D.S. Palasamudram, R.K. Sitaraman, B.Urgaonkar, and R. Urgaonkar,
Proceedings of the ACM Symposium of Cloud Computing (SOCC), San Jose, CA, October 2012. Download PDF
Energy-Aware Load Balancing in Content Delivery Networks,
Vimal Mathew, Ramesh K. Sitaraman, and Prashant Shenoy,
Proceedings of the the 31st Annual IEEE International Conference on Computer Communications (IEEE INFOCOM 2012), March, 2012. Download PDF