The American Association for the Advancement of Science (AAAS) has expressed deep concern about a congressional demand for detailed documentation on the scientific work and professional history of three researchers whose studies suggest temperatures in the Northern Hemisphere are warmer than they have been for a thousand years.
In a July 13 letter to U.S. Rep. Joe Barton, chairman of the House Committee on Energy and Commerce, AAAS CEO Alan I. Leshner said the committees requests to the researchers for information not only on their recent studies but also their lifes work "give the impression of a search for some basis on which to discredit these particular scientists and findings, rather than a search for understanding."
The research by climate scientists Michael Mann of the University of Virginia, Raymond Bradley of the University of Massachusetts and Malcolm Hughes of the University of Arizona provided support for the 2001 finding by a United Nations-sponsored panel that Northern Hemisphere temperatures rose significantly during the last part of the 20th century. Many scientific experts attribute that warming, at least in part, to the release of heat-trapping greenhouse gases by human industrial activity.
Earl Lane | EurekAlert!
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The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
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The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
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