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Table of Contents July 2005

Features

Putting Mechanics into Quantum Mechanics
Nanoelectromechanical structures are starting to approach the ultimate quantum mechanical limits for detecting and exciting motion at the nanoscale. Nonclassical states of a mechanical resonator are also on the horizon — Keith C. Schwab and Michael L. Roukes

The Nonequilibrium Thermodynamics of Small Systems
The interactions of tiny objects with their environments are dominated by thermal fluctuations. Guided by theory and assisted by new micromanipulation tools, scientists have begun to study such interactions in detail — Carlos Bustamante, Jan Liphardt, and Felix Ritort

Physics and the Real World
No current physics experiment or theory explains the nature—or even the existence— of emotions, money, fine art, football games, or people. What can physics say about such things? — George F. R. Ellis

A Physics Songbag
The editors of PHYSICS TODAY take you on a shuffle and a dip into the long tradition of giving a lyrical voice to science. This grab bag of songs concludes with a lyric-writing contest.

Departments

Reference Frame

Whence the force of F = ma? III: Cultural diversityFrank Wilczek

Issues & Events

Politics shapes life for Iranian physicist
Free on bail and currently visiting the US, an Iranian physicist wonders if it's safe to go home.

Science has Wolf as new advocate on Capitol Hill
After decades of working as a quiet but powerful player in Congress, Representative Frank Wolf has suddenly realized that US leadership in science and technology is threatened, and plans to do something about it.

Proliferation is key issue in nuclear power resurgence

World wind speeds suggest plentiful energy

News Notes

Web Watch

Books

Math and the Mona Lisa: The Art and Science of Leonardo da Vinci,
B. Atalay (reviewed by A. E. Shapiro)

Zoological Physics: Quantitative Models of Body Design, Actions, and Physical Limitations of Animals,
B. K. Ahlborn (reviewed by M. LaBarbera)

A Concise History of Solar and Stellar Physics, J.-L. Tassoul and M. Tassoul (reviewed by K. Phillips)

Structured Fluids: Polymers, Colloids, Surfactants, T. A. Witten with
P. A. Pincus, (reviewed by D. Weitz)

An Introduction to Materials Science, W. González-Viñas and H. L. Mancini (reviewed by C. L. Cahill)

New Books


Physics Today cover nanoelectromechanical resonator
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Cover: In this nanoelectromechanical resonator, the two coupled doubly clamped beams are driven separately and their motions are detected by induced electromotive forces. The fundamental resonance mode, which involves both beams, is near 40 MHz, and the smallest beam dimension is about 250 nm.
To learn more about how such NEMS structures are approaching the quantum limit, both as detectors and as objects of study in their own right, see the article by Keith Schwab and Michael Roukes that begins on page 36. (Image courtesy of Y.-T. Yang and K. Ekinci, Caltech.)

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