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Cover: The Madison Dynamo Experiment at the University of Wisconsin is one of several attempts worldwide to reproduce, in the laboratory, aspects of the liquid-iron geodynamo that generates Earth's magnetic field. Liquid sodium fills the experiment's 1-meter-diameter spherical vessel (covered in white thermal insulation). Seen at lower left are the motor and drive shaft of one of the two propellers that drive the liquid's flow. The white piping circulates oil that keeps the sodium just above its 98 °C melting temperature. To learn more about the experiment, see the news story on page 13. (Photo courtesy of Mark Nornberg.)

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Physics Today -- February 2006

Volume 59, Issue 2, pp. 9-71

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  • ARTICLES
  • PHYSICS UPDATE
  • LETTERS
  • SEARCH AND DISCOVERY
  • ISSUES AND EVENTS
  • MEETINGS
  • BOOKS
  • NEW PRODUCTS
  • WE HEAR THAT
  • OBITUARIES
    •

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    ARTICLES

      Geometrical Frustration
      When interactions between magnetic degrees of freedom in a lattice are incompatible with the underlying crystal geometry, exotic phenomena such as spin ice and spin liquid phases can emerge.
      Roderich Moessner and Arthur P. Ramirez
      pp. 24-29
      Abstract    Full Text: [ HTML   PDF (539 kB)  ]   

      Rethinking the Content of Physics Courses
      Physics students, particularly in today's information age, need to understand the unity of physics and the way in which scientific knowledge is generated.
      Diane J. Grayson
      pp. 31-36
      Abstract    Full Text: [ HTML   PDF (417 kB)  ]   

      Physics for All? A Million and Counting!
      Fully one-third of recent high-school graduates have taken physics. Much of the increase comes from nontraditional courses geared toward students not headed for careers in science or technology.
      Jack Hehn and Michael Neuschatz
      pp. 37-43
      Abstract    Full Text: [ HTML   PDF (944 kB)  ]   

    PHYSICS UPDATE

    LETTERS

    SEARCH AND DISCOVERY

      Turbulent Liquid-Sodium Flow Induces Magnetic Dipole in a Laboratory Analogue of the Geodynamo
      Supercomputers still can't simulate the self-excitation of planetary dynamos. So experimenters have taken up the challenge.
      Bertram Schwarzschild
      pp. 13-15
      Abstract    Full Text: [ HTML   PDF (199 kB)  ]   

      Experiment Tracks the Progress of a Chaotically Mixed Chemical Reaction
      Imaging an electromagnetically stirred tray of chemicals under diverse conditions reveals surprisingly uniform behavior.
      Charles Day
      pp. 15-16
      Abstract    Full Text: [ HTML   PDF (417 kB)  ]   

    ISSUES AND EVENTS

      Materials Institutes Weave Global Networks
      Six NSF-funded materials science institutes are working to train a new generation of internationally minded US researchers and to stimulate collaborations around the world.
      Toni Feder
      pp. 18-19
      Abstract    Full Text: [ HTML   PDF (184 kB)  ]   

      Stronger Future for Nuclear Power
      Nuclear reactor builders are jostling for business as energy utilities take another look at nuclear power.
      Paul Guinnessy
      pp. 19-20
      Abstract    Full Text: [ HTML   PDF (124 kB)  ]   

      NSF Centers to Study Societal Impact of Nanotechnology
      Jim Dawson
      pp. 20-21
      Abstract    Full Text: [ HTML   PDF (154 kB)  ]   

    MEETINGS

      APS March 2006 Exhibitor Program

      pp. 44-48
      Abstract    Full Text: [ HTML   PDF (285 kB)  ]   

    BOOKS

      New Books

      pp. 56-59
      Abstract    Full Text: [ HTML   PDF (423 kB)  ]   

    NEW PRODUCTS

    WE HEAR THAT

      Bienenstock Is New APS Vice President

      p. 66
      Abstract    Full Text: [ HTML   PDF (87 kB)  ]   

      Alferness Elected To OSA Vice Presidency

      pp. 66-67
      Abstract    Full Text: [ HTML   PDF (126 kB)  ]   

      Adair Is Voted AAPT Vice President

      p. 67
      Abstract    Full Text: [ HTML   PDF (90 kB)  ]   

    OBITUARIES

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