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Copyright (c) 2012 by the Institute of Electrical and Electronics Engineers, Inc. All rights reserved. Copyright and Reprint Permission Abstracting is permitted with credit to the source. Libraries are permitted to photocopy beyond the limit of U.S. copyright law for private use of patrons, those articles in this volume that carry a code at the bottom of the first page, provided that the per-copy fee indicated in the code is paid through the Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923. Other copying, reprint, or reproduction requests should be addressed to IEEE Copyrights Manager, IEEE Service Center, 445 Hoes Lane, Piscataway, NJ 08854-1331. IEEE Catalog Number: CFP12616-ART. ISBN: 978-1-4673-2308-6.