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August 1997

Volume 50, Issue 8

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Geophysical Dynamics at the Center of the Earth

Raymond Jeanloz and Barbara Romanowicz
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The Earth's iron core and its boundary with the rocky mantle are very active regions. Now we can see what's going on down there with unprecedented clarity.

How Nature Harvests Sunlight

Xiche Hu and Klaus Schulten
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Specialized molecular aggregates in purple bacteria exploit subtle quantum physics to collect and convert light energy for photosynthesis.

Temperature Scales Below 1 Kelvin

Robert J. Soulen, Jr and William E. Fogle
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Efforts are under way to develop a temperature scale t hat would reach as low as 0.001 kelvin and extend the present international scale, which is compromising many experiments conducted below 0.65 K.
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Physics Update

Phillip F. Schewe and Benjamin P. Stein
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A Beginner's Guide to the Atom Laser

Daniel Kleppner
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Theory Is Tied in Nots, but Strings May Have ‘Signatures’

Alan Kostelecky
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Author‐to‐Author Contact Simplifies AIP Figure Reprint Policy

John T. Scott
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New Elements Could Be Better Identified: Namely by Number

Greg Root
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Science Arms Us with Facts, Sometimes Is Disarmed by Authority

Alfred A. Brooks
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NSF Review Process Should Be Revamped, Not Taken for Granted

G. Wilse Robinson
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DOE Clarifies Budget Plans for High‐Energy and Nuclear Physics

S. Peter Rosen
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Luminescence from Porous Silicon: Mechanism Debated

Sharka M. Prokes, Orest J. Glembocki, Reuben T. Collins, Philippe M. Fauchet, and Michael A. Tischler
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Fixing CIA's Corona Camera Cleared Up Film, Fogged History

Frank J. Madden and Albert D. Wheelon
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New Results Are Right on the Quantum Dot

Moty Heiblum
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Call for Emission Limits Heats Debate on Global Warming

S. Fred Singer
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Need for Unity in Physics Prompts Call for Changes in PT

Brendan B. Godfrey
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Fundamental Law of Problems Is Traced to TV Reporter

Albert A. Bartlett
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Corrections

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Earth's Upper Mantle: How Low Can It Flow?

Barbara Goss Levi
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Does material in Earth's mantle circulate within the upper and lower regions separately, never mixing, or is the entire mantle stirred as one? The latest evidence indicates that convection involves at least some deep mixing of the upper mantle.

Quantum State Reconstruction of Squeezed Light

Graham P. Collins
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Accelerator Magnet with Brittle Superconductor Sets a Record

Bertram Schwarzschild
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Concert and Opera Halls: How They Sound

Leo Beranek and Dana Hougland, Reviewer
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The Peenemünde Wind Tunnels: A Memoir

Peter P. Wegener and Hans G. Hornung, Reviewer
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Naked to the Bone: Medical Imaging in the Twentieth Century

Bettyann Holtzmann Kevles and Charles A. Kelsey, Reviewer
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Before Big Science: The Pursuit of Modern Chemistry and Physics, 1800–1940

Mary Jo Nye and Erwin N. Hiebert, Reviewer
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Superconductivity of Metals and Cuprates

John R. Waldram and Allen M. Goldman, Reviewer
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The Origin of the Concept of Nuclear Forces

Laurie M. Brown, Helmut Rechenberg, and Ernest M. Henley, Reviewer
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New Books

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Focus on Software

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Fermi Award Given for Work in Nuclear Energy

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AGU Presents Awards in Baltimore

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Astrophysicists Selected to Receive 1997 Crafoord Prize

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APS Prizes Given at Summer Meetings

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In Brief

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FREE

Abdus Salam

Jogesh C. Pati
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Edward Mills Purcell

Robert V. Pound
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Robert Herman

Ralph A. Alpher
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Henry Margenau

Robert Adair
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Jean Weil Gallagher

Katharine B. Gebbie and John R. Rumble
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Rolf Wideröe

Gustav‐Adolf Voss
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Washington Dispatches

Irwin Goodwin
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National Research Council Studies Operate Under New Openness Rules

Irwin Goodwin
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CERN Plans to Reduce Costs through Voluntary Pay Cuts

Toni Feder
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Bell Labs Names Murray to Head Physical Research Lab

Toni Feder
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Goldston Is Named Director of PPPL

Jean Kumagai
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Sagan on Mars

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Postgraduation Plans of the Class of 1996

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In Brief

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Web Watch

Graham P. Collins
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