Magazine – PDF - Cal Lab Magazine

EDITOR’S DESKPUBLISHERMICHAEL L. SCHWARTZEDITORSITA P. SCHWARTZCAL LABPO Box 111113Aurora, CO 80042TEL 303-317-6670 • FAX 303-317-5295office@callabmag.comwww.callabmag.comEDITORIAL ADVISORSCAROL L. SINGERJAY BUCHERBUCHERVIEW METROLOGYCHRISTOPHER L. GRACHANENHEWLETT-PACKARDMIKE SURACICONSULTANTLOCKHEED MISSILES & SPACE (RETIRED)LEAD ASSESSOR, A2LA (RETIRED)MARTIN DE GROOTMARTINDEGROOT CONSULTANCYSubscription fees for 1 year (4 issues)$50 for USA, $55 Mexico/Canada,$65 all other countries.Visit www.callabmag.comto subscribe.Printed in the USA.© Copyright 2013 CAL LAB.ISSN No. 1095-4791Many ThanksWe’ve fallen off the proverbial economic cliff, but the car still reluctantlyfires up at five degrees and the house roof is still solid… the world did notend. In fact, the church across the street is still rocking on Wednesday nightsand “Junior,” the neighborhood skunk, has returned now twice as big.Since life progresses as usual, I took upon myself to clean up our mailing listfor undeliverable addresses and those who may not want to keep receiving themagazine. We source our mailing list from the MSC and NCSLI conferences,as well as paid subscriptions. We would love to send complimentarysubscriptions forever, but eventually we have to ask if subscribers wouldbe willing to pay for their subscriptions if they are no longer attending theconferences.We decided to keep subscription rates static indefinitely and offer a 10%discount to those who sign up for two years in order to attract more payingsubscriptions. Because of the increasing rise of printing and postage costs,advertising revenue is not always enough to keep publications continuingtoday. So I would like to especially thank all those who contribute to CalLab Magazine in order to keep us printing—article contributors; Ted Green,the creator of Cal-Toons; advertisers (hoorah advertisers!); subscribers; andpeers and community members who provide us with valuable feedback andsuggestions… many, many thanks.For this issue, our Metrology 101 contributor is Charles Sperrazza ofTegam, who wrote about verification of the Standing Wave Ratio (SWR) of a50 MHz reference. David Deaver contributed a great paper on “Stating BestUncertainties Over a Range of Values,” and Wesley England contributed hispaper, “An Uncertainty Analysis for a Positive Displacement Liquid FlowCalibrator Using the Water Draw Technique,” which was awarded Best Paperat MSC 2011.Again, thank you to everyone who makes it possible to print Cal LabMagazine each quarter!Regards,Sita SchwartzJan • Feb • Mar 20133Cal Lab: The International Journal of Metrology