Metrics for Assessing Flexibility and Sustainability of Next Generation Data Centers. - Alexis I. Aravanis; Artemis C. Voulkidis; Jaume Salom; Jacinta Townley; Vasiliki Georgiadou; Ariel Oleksiak; Milagros Rey Porto; Fabrice Roudet; Theodore B. Zahariadis (GLOBECOM Workshops, 2015)