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Physics Today magazine

The magazine for the physics community

Wireless is Everywhere - Sponsored link Whether you?re testing wireless devices or using them in your application, NI has a solution for you. Learn how you can benefit from using Wireless Technology. Grand challenges in basic energy sciences Research focused in five related areas will allow unprecedented control over the microscopic world and could be the key to a sustainable future Energy efficiency in the built environment Residential and commercial buildings constitute the largest energy-consuming sector in the US. Implementing efficiency measures can be an economically viable solution for reducing greenhouse gas emissions Home photovoltaic systems for physicists Installing a modest photovoltaic system and using it to run a suite of appliances can be educational and immensely satisfying. This brief how-to guide will help get you started UV survey finds 40% of the baryons missing from the nearby universe Most baryons exist in the near vacuum between clusters of galaxies. Accounting for all the baryons continues to challenge astronomers. Statistical mechanics elucidates constraints on the ultimate accuracy of biochemical sensing Some biochemical interactions are akin to detecting a sporadic signal against a noisy background. Electron-scattering experiments resolve short-range correlations among nucleons Researchers at Jefferson Lab confirm that high-momentum neutron?proton pairs in a carbon nucleus are 20 times more prevalent than proton?proton pairs. Physics Update