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Design News, April 2013

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Contents continued 60 xx Supplement gadget freak Inline Clock With Incandescent Display 60 David Christianson's inline clock has an electromechanical incandescent display based on an array of tiny projectors that share a ground glass rear projection plane. Departments 14 design decisions Understanding theValue of Integrated System Design 24 data Measurement & analysis An Introduction to Filters 26 Mechatronics Excelling in Shades-of-Grey RealWorld 28 green Scene Environmental News Engineers Can Use 30 News Trends,Developments, Breakthroughs 56 design engineering Products Best of the Engineering Marketplace automation & Control Find information on the convergence of safety and control systems,fully integrated motion controllers powering mobile, social robots, and a comparison of three different ball bearing materials. These stories, and more, also appear online at www.designnews.com. 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@ omeda.com. 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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