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Table of Contents May 2003

Articles

Quantum Shot Noise
Fluctuations in the flow of electrons can signal the transition from particlelike to wavelike behavior and signify the nature of charge transport in mesoscopic systems. — Carlo Beenakker and Christian Schönenberger

Molecular Electronics
Improvements in our understanding of how molecules transport charge, and how they interface to the macroscopic world, are fueling new devices and applications. — James R. Heath and Mark A. Ratner

Middle-School Texts Don't Make the Grade
Thousands of teachers are saddled with error-filled physical science textbooks that fail to present what science is all about. Physicists deserve some of the blame. — John Hubisz

Web departments

Readings from the Physics Today Archive

Departments

Physics Update

Reference Frame

Analysis and Synthesis I: What Matters for MatterFrank Wilczek

Letters

A Sound Use for Metal Foams

More on Carbon Sinks

Cinema as Physics Lesson

Julian Schwinger's Paradoxical Legacy


Search & Discovery

Two-Ion Logic Gates Open the Way to Further Advances in Quantum Computing
Precisely controlled logic gates are key ingredients in quantum computers, which can easily outperform classical computers for some problems.

Cosmic-Ray Muons Might Help Thwart Transport of Concealed Fissile Material
Physicists at Los Alamos propose a new kind of surveillance imaging that avails itself of a ubiquitous natural flux of highly penetrating radiation.

Experiments Investigate the Behavior of Pores in Artificial Vesicles
Twenty-first century experimental techniques combine with 19th century theory to explore how cell membranes behave when breached.

Issues & Events

Canada Catalyzes Research and Recruitment
Aggressive spending in Canada has spruced up research labs and promises an expansion of the Sudbury Neutrino Observatory, but it has also led to a time lag between setting up new equipment and finding money to maintain it.

Pentagon Revamps Nuclear Doctrine
The US government's plan to overturn a ban on designing new nuclear weapons is generating controversy.

Three Millimeter Arrays Converge in Inyo Mountains
After announcing in 2000 that two California telescope arrays would be united at a fresh site in the state's Inyo mountains, the project's university partners finally have the formal agreement and most of the money to go ahead with the merger.

Bahcall Awarded Dan David Prize
John Bahcall has won $1 million. A theorist at the Institute for Advanced Study in Princeton, New Jersey, Bahcall is being honored with a Dan David prize for his wide-ranging contributions to astrophysics.

News Notes
UK upgrades spallation source

Web watch
Grey Company Trebuchet Page; Acoustics and Vibration Animations; Physics Limericks

Special Report: War, Terrorism, and National Security Shape Bush R&D Budget in FY 2004; Civilian R&D Funding Flat
Nondefense physical sciences run a distant second to big increases in weapons development and homeland security in the administration's budget, and Congress is wondering what happened to money it authorized for NSF.

Books

Brotherhood of the Bomb: The Tangled Lives and Loyalties of Robert Oppenheimer, Ernest Lawrence, and Edward Teller, Gregg Herken (reviewed by Silvan Schweber)

Nature's Flyers: Birds, Insects, and the Biomechanics of Flight, David E. Alexander (reviewed by Z. Jane Wang)

Computational Methods in Environmental Fluid Mechanics, Olaf Kolditz (reviewed by Margot Gerritsen)

Defects and Geometry in Condensed Matter Physics, David R. Nelson (reviewed by David Thouless)

A Quantum Approach to Condensed Matter Physics, Philip L. Taylor and Olle Heinonen (reviewed by Piers Coleman)

Energy and the Environment, James A. Fay and Dan S. Golomb (reviewed by Marc H. Ross)

New Books

New Products

Focus on Lasers and Optics

We Hear That

SoR Presents Bingham Medal to Larson

AAS Honors Science Writers

In Brief

Obituaries

Martin David Kamen

David Todd Wilkinson

Robert Wilson

Melvin Lax

Bela Adalbert Lengyel

William Glenn Sly



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Cover: This scanning electron micrograph shows crossbars of platinum nanowires. The wires at the center are about 10 nm in diameter and 30 nm apart. Molecular switches sandwiched at the intersections in that central region would create a random-access memory with a density of 32 gigabytes per square inch; the technique can be extended to obtain ultrahigh densities approaching 500 GB/in2. For more about the state of the art in molecular electronics circuitry, see the article by James Heath and Mark Ratner starting on page 43. (Image courtesy of Ferenc Krausz.)

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