Physics Today on the web
April 2000 Contents
March 2000 Cover
Cover: Blocked coronary arteries are often torn by a surgical procedure intended to clear them, balloon angioplasty. To prevent scar tissue from forming and reblocking the artery, a radioactive solution of a beta emitter is applied to the target region through the same catheter used for the balloon. To learn more about this and other novel procedures, read Bert Coursey and Ravinder Nath’s article, “Radionuclide Therapy” (Illustration by Jeffrey Aarons, National Institute of Standards and Technology.)
Articles

Radionuclide Therapy
Physicists and physicians are working together to devise new methods for exploiting the power of ionizing radiation to treat cancer and coronary artery disease
Bert M. Coursey and Ravinder Nath

A Fresh Look at Entropy and the Second Law of Thermodynamics
The existence of entropy, and its increase, can be understood without reference to either statistical mechanics or heat engines
Elliott H. Lieb and Jakob Yngvason

The Composite Fermion: A Quantum Particle and Its Quantum Fluids
The fractional quantum-Hall effect and other exotic behaviors of electrons trapped in two dimensions can be understood in terms of composite particles—electrons sporting attached flux quanta
Jainendra K. Jain

Departments

Physics Update

Reference Frame

Letters

Search and Discovery
Explorers focus more sharply on their prey: Weakly interacting dark matter . . . Ultracold neutrons are magnetically trapped at NIST . . . Magnetic semiconductors enable efficient electrical spin injection

Washington Reports
Clinton’s ‘historic’ R&D budget for fiscal 2001 puts Republican Congress in a quandary . . . APS and AAAS leaders protest ‘inhumane treatment’ of suspected Los Alamos spy in jail, awaiting trial

Physics Community
Bell Labs wins long-running patent battle over high-Tc superconductor . . . UCSC to get grades . . . From quarks to squawks: Former physicist plays avant-garde sax . . . Ban on nuclear waste transport eased in Germany . . . Cosmology prize starts with a bang . . . Strasbourg interdisciplinary institute gets off the ground . . . Global seismic hazard map unveiled . . . In Brief . . .Web Watch

Books
Stepping Stones: The Making of Our Home World, S. A. Drury, The Search for Life on Other Planets, B. Jakosky, and Planetary Dreams: The Quest to Discover Life beyond Earth, R. Shapiro (reviewed by A. H. Knoll) . . . Astronomy in Prehistoric Britain and Ireland, C. Ruggles (reviewed by M. H. Shank) . . . The Odd Quantum, S. Treiman (reviewed by R. H. March) . . . Reason Enough to Hope: America and the World of the Twenty-first Century, P. Morrison and K. Tsipis (reviewed by W. Happer) . . . Dorothy Hodgkin: A Life, G. Ferry (reviewed by E. V. Mielczarek) . . . Adaptive Optics for Astronomical Telescopes, J. W. Hardy and Adaptive Optics in Astronomy, edited by F. Roddier (reviewed by L. Thompson)

New Products
Focus on microscopy

We Hear That

Obituaries
Robert Rathbun Wilson . . . Richard Latter . . . Barbara Hope Cooper . . .Charles Edward Swenberg . . . Jan van Paradijs . . . Klaus Kinder-Geiger . . . Dorothy N. Davis Locanthi

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© 2000 American Institute of Physics