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April 2008

Volume 61, Issue 4

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Cosmic sound waves rule

Daniel J. Eisenstein and Charles L. Bennett
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In the microwave background and the distribution of galaxies, relic imprints of primordial sound waves have contributed to an extraordinarily detailed history of the cosmos. And they provide yardsticks for resolving a great mystery.

Medieval dynamics

Edith Dudley Sylla
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Thomas Bradwardine's 14th‐century dynamical law may not be well known today, but it greatly influenced European scholars through the late Middle Ages and into the Renaissance.

Chemistry on the computer

Martin Head‐Gordon and Emilio Artacho
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Although exact descriptions of the quantum mechanics of molecules are computationally intractable, chemists and physicists have devised approximations that are efficient enough to be practical and accurate enough to be useful.
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Who or what is RVB?

Philip Anderson
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Houghton friends and foes weigh in on global warming

Ben Zuckerman, Brahama D. Sharma, Warren Norred, Rustum Roy, and Foster Morrison
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Random thoughts on densest packing

David L. Rosen, Georgi Georgiev, Terry Goldman, and Paul Chaikin
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A brief etymology of cybernetics

Frank R. Tangherlini
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Science on stage: Minor clarification

Carl Djerassi
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Spontaneous knots and the law of snaggature

Stephen Cohen
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Trends in the hydrology of the western US bear the imprint of manmade climate change

Barbara Goss Levi
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Water managers may no longer be safe in assuming that resources will remain within their historical range of uncertainty.

Light exhibits a spin Hall effect

Charles Day
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Whenever a linearly polarized beam of light refracts, it splits into two parallel, almost overlapping beams of opposite circular polarization.

A muscle's mechanical advantage is not constant

Johanna Miller
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Experiments and simulations reveal that the velocity amplification in a turkey's calf muscle depends on the force that the muscle opposes.

A bubble chamber brings new capabilities to the search for WIMPs

Bertram Schwarzschild
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In the quest to learn what dark matter is made of, bubble chambers can render the enormous background of keV electrons invisible.

Interferometry data challenge prevailing view of wave propagation in the cochlea

Mark Wilson
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Nonlinear amplification of sound in the inner ear generates distortion that leaks out through the eardrum. But how those waves travel backward along the cochlear spiral remains unsettled.

physics update

Stephen G. Benka, Phillip F. Schewe, and R. Mark Wilson
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New European agency introduces internationally competitive funding for basic research

Toni Feder
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Some 300 young researchers are receiving roughly €1 million apiece in a new strategy to strengthen Europe's research base through broader competition.

Interpreting art to teach science

Toni Feder
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New radiation detectors for US ports leave lawmakers skeptical

David Kramer
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MoMA show explores science and design

Toni Feder
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Industry R&D forecast is bullish despite concerns over talent dearth

Jermey N. A. Matthews
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news notes

Paul Guinnessy and Jermey N. A. Matthews
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web watch

Charles Day
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Final Bush R&D budget again boosts physical sciences; takes parting shot at earmarks

David Kramer
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For the third year, President Bush's American Competitiveness Initiative proposes big increases for NSF, the Department of Energy, and NIST. Funding for most other agencies would rise modestly.
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San Jose hosts CLEO∕QELS 2008

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Nuclear Weapons: What You Need to Know

Jeremy Bernstein and David Hafemeister, Reviewer
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New Theory of the Earth

Don L. Anderson and Peter Olson, Reviewer
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Von Braun: Dreamer of Space, Engineer of War

Michael J. Neufeld and Maura Mackowski, Reviewer
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Fundamental Forces of Nature: The Story of Gauge Fields

Kerson Huang and Hans C. von Baeyer, Reviewer
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The Atomic Bazaar: The Rise of the Nuclear Poor and Deception: Pakistan, the United States, and the Secret Trade in Nuclear Weapons

William Langewiesche, Adrian Levy, Catherine Scott‐Clark, and Trevor Findlay, Reviewer
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new books

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Focus on nanoscience and technology

Lawrence G. Rubin
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Stanley Flatté

Thorne Lay and Abraham Seiden
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Shining a light on dental composite restoratives

Jeffrey W. Stansbury, Christopher N. Bowman, and Sheldon M. Newman
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Academy Awards for computational physics

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