Magazine
January-February 2005
January-February 2005
Volume: 93 Number: 1
Using an electronic metal detector, a technician attempts to find land mines placed near the thousand-year-old Banteay Srei temple in Cambodia. Ground-penetrating radar and mine-sniffing dogs are also frequently employed for such dangerous work, but soon mine-removal experts may benefit from equipment based on nuclear quadrupole resonance, a phenomenon that is similar to nuclear magnetic resonance, which forms the basis of MRI imaging. In "Explosives Detection with Nuclear Quadrupole Resonance," Joel B. Miller and Geoffrey A. Barrall describe the physical basis for this technique, which is being applied to uncover both land mines hidden in the ground and terrorist bombs hidden in cars or luggage. (Photograph by Catherine Karnow/Corbis.)
In This Issue
- Art
- Astronomy
- Biology
- Chemistry
- Communications
- Computer
- Economics
- Engineering
- Environment
- Ethics
- Evolution
- Mathematics
- Medicine
- Physics
- Policy
- Psychology
- Sociology
- Technology
The Star-formation History of the Universe
Alan Heavens
Astronomy Mathematics Physics
Different formation histories of large and small galaxies affected the rate at which stars were produced
Explosives Detection with Nuclear Quadrupole Resonance
Joel B. Miller, Geoffrey Barrall
Environment Physics Sociology Technology
An emerging technology will help to uncover land mines and terrorist bombs
Exercise Controls Gene Expression
Frank Booth
Biology
The activity level of skeletal muscle modulates a range of genes that produce dramatic molecular changes—and keep us healthy
The Home of Blue Water Fish
John Richert, Salvador Jorgensen, Abbott Peter Klimley
Biology Environment Psychology
Rather than singly inhabiting the trackless ocean, pelagic fish species travel together in groups, which migrate between hidden, productive oases
