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July 1995

Volume 48, Issue 7

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Thermoacoustic Engines and Refrigerators

Gregory W. Swift
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On the heels of basic research, commercial developers are harnessing acoustic processes in gases to make reliable, inexpensive engines and cooling devices with no moving parts and a significant fraction of Carnot's efficiency.

The Discovery of Superfluidity

Russell J. Donnelly
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Superfluidity and superconductivity have strong analogies to each other. Why then did over a quarter of a century pass between the discoveries of these two phenomena?
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Physics Update

Phillip F. Schewe
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The Most Tenuous of Molecules

Daniel Kleppner
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Save OTA from Congress's Budgetary Ax

Lewis M. Branscomb
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Scientists Can't Afford Disinterest in US Debt

Gary G. Gimmestad
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Did Sagdeev Disguise Soviet System's Sins?

Yakov Alpert, Roald Sagdeev, and Richard L. Garwin
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Parapsycholocial Review A?

Jonathan P. Dowling and Henry P. Stapp
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Physics Today Redesign Reaction

Benjamin Bederson
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Correction

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Atom Interferometers Prove Their Worth in Atomic Measurements

Barbara Goss Levi
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Researchers have used an atom interferometer to measure for the first time the complex index of refraction for an atom wave passing through a gas and to determine the electrical polarizability of an atom more precisely than before.

In a Two‐Dimensional Electron System, the Skyrmion's the Limit

Ray Ladbury
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A sensitive nmr technique has found evidence for skyrmions in a two‐dimensional electron system and challenged our understanding of the quantum Hall effects.
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Why I Am∕Am Not a Physicist

Neil Gershenfeld
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ACA Meets in Montreal, Marking 100 Years of X Rays

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The Interpretation of Quantum Mechanics

Roland Omnes and Richard Scalettar, Reviewer
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Veiled Reality: An Analysis of Present‐Day Quantum Mechanical Concepts

Bernard d’Espagnat and Richard Scalettar, Reviewer
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High Energy Astrophysics: Vol. 2

Malcolm S. Longair and Gaurang B. Ypdh, Reviewer
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The Cosmological Milkshake: A Semi‐serious Look at the Size of Things

Robert E. Ehrlich and Brian B. Schwartz, Reviewer
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Dynamics: Numerical Explorations

Helena E. Nusse, James A. Yorke, and William L. Ditto, Reviewer
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A Friendly Guide to Wavelets

Gerald Kaiser and Lonnie H. Hudgins, Reviewer
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New Books

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New Products

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We Hear That

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FREE

Paul Urban

Fritz Rohrlich
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FREE

Seymour Vosko

Michael Walker
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FREE

Joachim Michael Nitschke

Kristin Balder‐Froid and T. J. M. Symons
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As Republicans Try to Pull DOE's Plug, Department Officials Defend Operations

Irwin Goodwin


See Also: Erratum

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The Budget Action Ahead

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To Win NPT Extension, Nuclear States Promise Test Ban and Disarmament—Again

Jean Kumagai
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Technology May Help Contain the Nuclear Genie

Denis F. Cioffi
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Boyce Passes AAS Executive Office to Milkey

Roslyn M. Dupré
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APS Says Dangers from EMFs Are Unsubstantiated

Denis F. Cioffi
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In Brief

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