Overview of ict energy consumption (deliverable 8.1) - Lannoo, Bart; Lambert, Sofie; Van Heddeghem, Ward; Pickavet, Mario; Kuipers, Fernando; Koutitas, George; Niavis, Harris; Satsiou, Anna; Beck, Michael Till; Fischer, Andreas; others (Report of the EU FP7 Project FP7-2888021, 2013)