Design News, January 2013

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Contents continued 64 64 Supplement gadget freak Wearable Computer Keeps Tabs on Fido & Kitty fluid Power/ Motion Control Pete Cross created the PetInspect gadget to record data on how a pet is being treated while it is boarded. Find stories on gas flow and measurements, position measurement in 5-axis machining,and minimizing friction in pneumatic cylinders. Departments 14 design decisions 32 When Hydrogen Embrittlement Strikes 26 data Measurement & analysis Encoders KnowAll theAngles 28 Mechatronics A Forgotten Practice Can Save US Industry $500 Billion aYear 30 green Scene Environmental News Engineers Can Use News Trends,Developments, Breakthroughs 59 Social engineering Will One PLC Suffice? 60 design engineering Products Best of the Engineering Marketplace These stories, and more, also appear online at DESIGN NEWS® (ISSN 0011-9407) is published monthly by UBM Electronics, 600 Community Drive, Manhasset, NY 11030; 516-5625000. Periodicals postage paid at Manhasset and at additional mailing offices. SUBSCRIPTIONS – Free to qualified subscribers as defined on the subscription card. Rates for non-qualified subscriptions, including all issues: U.S.A, $150.00 one year, $250.00 two years, $300.00 three years; Canada, $184.90 one year, $314.90 two years (includes 7% GST, GST# 123397457); Mexico, $172.90 one year, $295.90 two years; Foreign air expedited $323.90 one year, $579.90 two years. Except for special issues where price changes are indicated, single copies are available for $10 U.S.A and $15 foreign. For telephone inquiries regarding subscriptions 847-559-7597. Email: desn@ CHANGE OF ADDRESS – Notices should be sent promptly to DESIGN NEWS® P.O. Box 3609, Northbrook, IL 60065 – Please provide old mailing labels as well as new address. Allow two months for change. NOTICE – Every precaution is taken to ensure accuracy of content; however, the publisher cannot accept responsibility for the correctness of the information supplied or advertised or for any opinion expressed herein. POSTMASTER – Send address changes to, DESIGN NEWS® Box 3609, Northbrook, IL 60065, Canada Post: Publications Mail Agreement 40685520. Return undeliverable Canadian addresses to: APC, P.O. 503, RPO West BVR CRE, Rich Hill, ON L4B 4R6. Printed in U.S.A. Copyright 2011 by UBM Electronics. All rights reserved. Reproduction in whole or part without written permission is prohibited.

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