Issues
Reference Frame
What is science?
Helen Quinn is a theoretical particle physicist at SLAC. Throughout her career, she has been passionately involved in science education and public understanding of science.
Letters
Search and Discovery
Superconducting qubit systems come of age
The precision control demonstrated in two recent experiments makes those systems serious contenders in the long race for a quantum computer.
Superconducting device helps probe glasslike dynamics in solid helium
Accurate measurements over a wide range of conditions may unravel some of the mysteries of the apparently flowing solid.
Analysis reveals when evolution favors one mode of gene regulation over another
Bacteria use two basic modes for controlling the expression of a gene. Which mode prevails depends on how conditions vary and on the statistical mechanics of genetic mutation.
Issues and Events
Need for clean energy, waste transmutation revives interest in hybrid fusion–fission reactors
Sweet solution or pie in the sky? Hybrids get new attention.
Special report: Obama proposes big increases for energy, climate change, and basic research
The president’s first budget, and a supplement from the American Recovery and Reinvestment Act, would put federal support for basic physical sciences research back on schedule for a 10-year doubling by 2016.
Articles
Industrial R&D in transition
An American Institute of Physics study completed in 2008 documents the ways in which the corporate physicist’s work has changed in the past 40 years. Here are its major findings.
Population genetics and range expansions
On a molecular level and at the frontiers of expanding habitats, large stochastic fluctuations can obscure signals of Darwinian evolution.
The dichotomous history of diffusion
Nearly a century after the equations of physical diffusion and stochastic diffusion were formulated, Albert Einstein united the observable and the abstract to establish a molecular–kinetic theory of heat.
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Obituaries
Laszlo Tisza
Yoji Totsuka
Quick Study
Janus particles
What if one could see under a microscope how molecules fit together? Tiny Janus spheres, whose chemical makeup differs between two sides, represent an exciting step in that direction.