2 28 24

An appreciationof pioneers.

and 42

teatures

24 engineering' 't

' G~:~~~~~~~GREEN CHOICESTake four and one winning businessplan. By Alan S. Brown

28 AREYOURPEOPLEFIREFIGHTERS? If they may be wise to alterstratégy. By Mia Doucet

30 CONTINUAL C~REER CHANGE Tomorrow's engineers will need tobe adaptable. BV Steven Kerno

SOLIDX-RAYNew,roles for rapid prototyping in medical treatments"l3y'.jeàrî Thilmany

, ₁

l FELLOWSINSERVICETO THENATION By Mary Jallles Legats~i

TRACINGTHESECOND LAWThelongroadta understandingtherr'nodyn~rDi2,s. By Howard W. Butler

2 THEMANY;A~D+HE FEWA young engineer saw the principle that everything flows one way, from high to low.

BV Adrian Bejan

INPLIJ/OUTPUT Moralefiber. By Michael Abrams

~~t:

Magazine

"",.0,", m"o,"'

W ^§,e8@ General E«ellentO Award a:r.t:j

Mechanical Engineering S!~"".

MECHANICAL ENGINEERING(ISSN 0025-6501)i5 published momhly by The Amenean Society ofMeehan- i,,[ Enginem, Th"e Pack Avenue. New Ymk. h'Y lOO16-5990. Pcciodi,," postage paid al New y mk.

NY,'nd idditiona[ maihngoffiœs, POST!vIASTER: Sena add"" eh"'gcs co Mec""';,,,! Engin",i"g, cio The ,Am"ican SocietY ofMech'nièa[Engin'e~,22 Cow Drive, Box 2300, Faidicld, NJ OïOO7-2300, PRICES: Ta membe~, annuaJly5290fm iniriaJ membe",hip subsctiption, single copy 54: subscciption pliee to nonm,mec» avaibbk upon teqnest. COPYRIGHT~ 2007by The Am,ti"n Society ofMecham,,[

Enginee"" Canildian Goach &SccvieÙTax RegiStntiôn#12614S048, l'lintCd in U,S,A, Auchmization tO photOcopy untorial foc lo"malot pèhonal mC "nd" ei<.tuo~t<mm Hot fulliog wlthlo the ">le tOC pmvl;lom of the Copyright Act ie gomtccnyASMEtO lib"",i" ,."d othet use» "gistctcd with the Copylight Cleat- anec Cente' T,",ÙctionalRepoctipgServiçc, 2~2,Rose,vood Drive, Danvm, MA 01923, Request foc spe- tio[ pennission mbulk copyingshould bc addecsscd'toReprio"/Penni$Siom Depmment.

2 July 2007 mechanical.engipeei'ing

1

,Juiy 2007 ..

Onthe

.The entrepreneuriallure ofteéhnology.

p~ge24

LETTERS

NEWS & NOTÈS

»

The' June.Question of..the...Mont~was:

What isthe bestwayto reducethêarnount gasoline consumed in the UnitedStates?

5% There is no need ta reduce gas consumption [ncrease the lederal

gasoline tax

Develop alternative

luels

One reader replied, "If there is a need to red~tce consump- lion, il will be brou.ght about by ma,rketforces, i.e., priee ris- es d~w to projected scarcity." Another respondent said that rather than develop new fuels, the government should "Inodi- fy the jimding of Toad constnwtion and maintenance. CUT-

Tently, this is done as a shtshf~md-Jiœl taxes in and gov- emment payments ma, with no relationship other than gmft and corruption between revenue and r!.-1;penses. Instead, have allfederal road cons traction, maintenance, and debt service on existing bonds paid .trom the federal gas tax. "

The next Question of the Month will be posted July 2,

44 NEWPRODUCTS

56 PRODUCTINFORMATU

57 CODES& STANDARDS

58 ME BOOKSHELF

59 OPPORTUNITIES

62 ^CONSULTING