IEEE Spectrum Magazine, Volume 46 Number 4, April 2009

IEEE Spectrum Magazine, the flagship publication of the IEEE, explores the development, applications and implications of new technologies. It anticipates trends in engineering, science, and technology, and provides a forum for understanding, discussion and leadership in these areas.
IEEE Spectrum is the world's leading engineering and scientific magazine. Read by over 300,000 engineers worldwide, Spectrum provides international coverage of all technical issues and advances in computers, communications, and electronics. Written in clear, concise language for the non-specialist, Spectrum's high editorial standards and worldwide resources ensure technical accuracy and state-of-the-art relevance.


COVER STORY
30 MARCH
OF THE SANDBOTS
Legged robots are striding more successfully than ever with the help of
some fl eet-footed desert natives.
By Daniel Goldman, Haldun Komsuoglu & Daniel Koditschek
26 SHRINKING POSSIBILITIES
Transistors will continue scaling to smaller than 20 nanometers, but it
won’t happen without extreme ultraviolet lithography. By Bill Arnold
36 THE UNIVERSAL HANDSET
Riddle: How many gadgets does it take to make cellphone calls, tap the
Internet, and receive broadcast television? Answer: Soon, only one.
By Peter Koch & Ramjee Prasad
42 TOP TEN TECH CARS
After years of talk, the auto industry is fi nally building electric
(or partially electric) cars. By John Voelcker

UPDATE
11 SMARTS ARE ONLY
FOR SOME BRIDGES
Despite a boost in infrastructure
spending, most U.S. bridges will
stay dumb. By Prachi Patel
13 AUTOMATED AUDITORS
14 SILENCING CELLPHONES
15 VOLCANIC LIGHTNING
16 CONSUMER FUEL CELLS
18 THE BIG PICTURE
TV gets its turn in the spotlight.
OPINION
8 SPECTRAL LINES
Can “cap and tax” help President
Obama’s ambitious US $150 billion
energy plan succeed?
10 FORUM
The truth about scuba rebreathers and
the state of the art in lattice-based
cryptography. Plus: Nvidia talks back.
24 TECHNICALLY SPEAKING
Tap into the information at your
fi ngertips. By Paul McFedries
DEPARTMENTS
4 BACK STORY
Desert dwellers can be divas.
6 CONTRIBUTORS
20 HANDS ON
Profl igate gasoline user, heal thyself!
Step one: Build your own fuel-use
monitor. By David Schneider
21 TOOLS & TOYS
Solving equations has never been
easier, with one new math program
and big updates to four others.
By Kenneth R. Foster
22 MEDIA
Artist-programmer Aaron Koblin built
a 10 000-person social network for
his latest work. By Susan Karlin
23 CAREERS
How tightly do the ties that bind—
noncompete clauses—bind?
By Willie D. Jones
64 THE DATA
Cray X-MP versus Sony PlayStation 3:
And the winner is…. By Paul Wallich

Thanks to original uploader!