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May 2002 Contents


Features
   
    Band-structure engineering has led to a fundamentally new laser with applications ranging from highly sensitive trace-gas analysis to communications -- Federico Capasso, Claire Gmachl, Deborah L. Sivco, and Alfred Y. Cho
   
    We need general relativity to understand extreme astrophysical realms. But the theory also turns out to be essential for the many mundane activities that nowadays rely on the precision of the GPS -- Neil Ashby
 
    A study by the National Research Council makes several recommendations for improving the Advanced Placement program in the US -- Jerry P. Gollub and Robin Spital
Web Departments
 
Departments
 
  Reference Frame
 
   
  Letters
   
   
   
   
   
   
  Search & Discovery
 
    For years, biologists have used NMR to determine molecular structures. Now they're using it to see how those structures change shape.
 
    A close encounter with a supernova two million years ago might be responsible for a widespread extinction of mollusks.
 
    The Kondo effect is well established in metals and in quantum dots. Could something similar be occurring in quantum point contacts?
  Issues & Events
 
    At the first International Conference on Women in Physics, participants traded stories and statistics and forged personal and professional contacts.
 
    The DOE's new Office of Science director expresses particular interest in nanoscience and fusion research and wants the US involved in ITER.
 
    Why the quantum? How come existence? It from bit? A participatory universe? What makes meaning? Those are some of the "Really Big Questions" of John Archibald Wheeler.
 
    Physicist and priest John Polkinghorne is this year's winner of the Templeton Prize, first bestowed in 1973 on Mother Teresa.
 
    After three months of uncertainty following a contentious breakup with its long-time US Department of Defense sponsor, the independent science advisory group JASON was on the verge in mid-April of signing a contract with a new DOD sponsor.
 
    CERN management has sketched a preliminary plan to pay the extra costs of the Large Hadron Collider, a 14-TeV proton collider being built in a tunnel under the French-Swiss border.
 
    In what may be a reprise of the theory of evolution controversy that beset the Kansas public education system a couple of years ago, the Ohio board of education is embroiled in a growing dispute between scientists and advocates of a new version of creationism called "intelligent design."
   
    US-Mexico radio telescope; Albany wafer R&D center; Barcelona light source; MIT-Army nanotechnology center; Georgia starts NSF-inspired agency; Materials journal
   
    The Universe in the Classroom; Insultingly Stupid Movie Physics; Physics in Canada Online
  Society Meetings
   
   
  Books
    A Quest for Perspectives: Selected Works of S. Chandrasekhar (With Commentary), edited by Kameshwar C. Wali (reviewed by William H. Press)
    Electricity and Magnetism in Biological Systems, D. T. Edmonds (reviewed by Robert K. Adair)
    Nuclear Reactor Physics, Weston M. Stacey (reviewed by Noel Corngold)
    Low Temperature Electronics: Physics, Devices, Circuits, and Applications, Edmundo A. Gutiérrez-D., M. Jamal Deen, and Cor L. Claeys (reviewed by Lawrence G. Rubin)
    Wavelets: Tools for Science and Technology, Stéphane Jaffard, Yves Meyer, and Robert D. Ryan
A First Course in Wavelets with Fourier Analysis , Albert Boggess and Francis J. Narcowich (reviewed by David L. Donoho and Paul L. Donoho)
    Theoretical Astrophysics - Volume I: Astrophysical Processes and Volume II: Stars and Stellar Systems , E. R. Dobbs (reviewed by R. B. Hallock)
    New Books
  New Products
  We Hear That
    McKenzie Wins Crafoord Prize
    German Society Bestows Awards
    AAAS Honors Scientific Achievement
    AAS Elects New Vice President
    In Brief
  Obituaries
    Victor Iosifovich Belinicher
    William McCullough MacDonald
    Bruce Sween Liley
    Timothy Edward Toohig
    Charles William Van Atta
  Job Opportunities

 

© 2002 American Institute of Physics

 

Cover: A new-generation global positioning satellite on the assembly line at Lockheed Martin Corp. The thin striped poles constitute an antenna array that beams microwave signals preferentially toward Earth as the satellite orbits 20 000 km aboveground. In the article on page 41, Neil Ashby discusses the relativistic corrections, including gravitational redshifts, that the GPS cannot ignore. (Photo courtesy of Lockheed Martin.).
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