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May 2004

Volume 57, Issue 5

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Light's Orbital Angular Momentum

Miles Padgett, Johannes Courtial, and Les Allen
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The realization that light beams can have quantized orbital angular momentum in addition to spin angular momentum has led, in recent years, to novel experiments in quantum mechanics and new methods for manipulating microparticles.

Cryogenics on a Chip

Jukka Pekola, Robert Schoelkopf, and Joel Ullom
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Low‐temperature techniques often bring to mind cryogenic liquids, gas compressors, and massive installations. But researchers are now building refrigerators and sensors that work by controlling electrons on a silicon chip.

Conversations on Nonequilibrium Physics With an Extraterrestrial

David Ruelle
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Nonequilibrium systems come in many varieties, and a number of not‐yet‐reconciled mathematical approaches can be applied to them.
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Physics Update

Ben Stein and Phil Schewe
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Could Feynman Have Said This?

N. David Mermin
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Resources, Energy, Heartburn for Academic Physics

Nigel Goldenfeld, John R. Fanchi, Jeffrey Marque, David R. Kohler, John Rigden, and James Stith
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Readers Weigh Options for Bunker Busting Weapons

Bryan L. Fearey, Paul C. White, John St. Ledger, John D. Immele, Jeffrey Marque, and Robert W. Nelson
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A Reader Answers: ‘Critical Mass’ Origin

Guenther Eichhorn and Michael J. Kurtz
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Ben Franklin Would Endorse Individual Responsibility

King Wiemann
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Conflicting Results on a Long‐Lived Nuclear Isomer of Hafnium Have Wider Implications

Bertram Schwarzschild
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The Pentagon is touting prospects, based on hotly disputed experiments, for a novel class of weapons intermediate between chemical high explosives and fission weapons.

Smoke From Burning Vegetation Changes the Coverage and Behavior of Clouds

Charles Day
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Aerosols, such as smoke, help clouds to form by acting as nucleation sites for water droplets. But that's not the only way aerosols influence clouds.

Hot Buckyballs Lose Quantum Coherence

Charles Day
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US Government Backs Off From Imposing Restrictions on Publishers

Toni Feder
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In permitting one scholarly publisher's activities, the Treasury Department seems to have muddied the dispute over freedom of the press and, in addition, has warned against collaborations between US scientists and their colleagues in sanctioned countries.
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Marburger Refutes Claims That Bush Administration Misuses Science

Jim Dawson and Paul Guinnessy
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White House rebuttal fails to persuade many in the science community.
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Yucca Mountain Workers Exposed to Dangerous Dust

Jim Dawson
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On the Mend, Gran Sasso Sacrifices Low‐Energy Neutrino Observatory

Toni Feder
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Successful Entrepreneur Gives Back to Science

Paul Guinnessy
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Cosmologist Ellis Receives Templeton Religion Prize

Toni Feder
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News Notes

Toni Feder
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Web Watch

Charles Day
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The Big Splat, or How Our Moon Came to Be

Dana Mackenzie and Erik Asphaug, Reviewer
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The Gravitational Million‐Body Problem: A Multidisciplinary Approach to Star Cluster Dynamics

Douglas Heggie, Piet Hut, and Frederic A. Rasio, Reviewer
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Back‐of‐the‐Envelope Physics

Clifford Swartz and Robert K. Adair, Reviewer
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Foundations of Nanomechanics: From Solid‐State Theory to Device Applications

Andrew N. Cleland and Jacqueline Krim, Reviewer
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New Books

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Focus on Lasers and Optics

Lawrence G. Rubin
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AIP Gives Tate Medal to Schopper

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AAPT Presents Awards at Miami Meeting

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RAS Names Award Recipients

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NAE Elects 76 New Members

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In Brief

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Nandor Balazs

Robert de Zafra, Tom Bergeman, Michael Berry, Roger Balian, and André Voros
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George Wells Farwell

David Bodansky, Isaac Halpern, and Ernest Henley
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Maurice Henry Lecorney Pryce

Bill Dalby, John Sanders, and Kenneth Stevens
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Brian Garner Wybourne

Philip H. Butler, Ronald C. King, and Lidia Smentek
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