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Changing the way the world boosts power

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POWER ENGINEERING, ISSN 0032-5961, USPS 440-980, is published 12 times a year by Penn Well Corp., 1421 S. Sheridan Rd., Tulsa, OK 74112; phone (918) 835-3161. ©Copyright 2008 by Penn Well Corp. (Registered in U.S. Patent Trademark Office). Authorization to photocopy items for internal or personal use, or the internal or personal use of specific clients, is granted by POWER ENGINEERING, ISSN 0032-5961, provided that the appropriate fee is paid directly to Copyright Clearance Center, 222 Rosewood Drive, Danvers, MA 01923 USA 508-750-8400. Prior to photocopying items for educational classroom use, please contact Copyright Clearance Center, Inc., 222 Rosewood Drive, Danvers, MA 01923 USA 508-750-8400. Periodicals postage paid at Tulsa, OK and additional mailing offices. Subscription: U.S.A. and possessions, $74 per year; Canada and Mexico, $82 per year; international air mail, $204 per year. Single copies: U.S., $10, Outside U.S. $16. Back issues of POWER ENGINEERING may be purchased at a cost of $10 each in the United States and $16 elsewhere. Copies of back issues are also available on microfilm and microfiche from University Microfilm, a Xerox Co., 300 N. Zeeb Rd., Ann Arbor, MI 48103. Available on LexisNexis, Box 933, Dayton, OH 45402; (800) 227-4908. POSTMASTER: Send change of address, other circulation information to POWER ENGINEERING, PO Box 3271, Northbrook, IL 60065-3271. “POWER ENGINEERING” is a registered trademark of Penn Well Corp.

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