Procedia Computer Science 32 (2014) 182 – 189 1877-0509 © 2014 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). Selection and Peer-review under responsibility of the Program Chairs. doi:10.1016/j.procs.2014.05.413 ScienceDirect Available online at www.sciencedirect.com © 2014 Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/). Selection and Peer-review under responsibility of the Program Chairs.