Type 1A supernovae: A tiny white dwarf, left, pulls gas from its companion star. When it grows to a critical size, it is consumed in a massive thermonuclear explosion
Courtesy of Lawrence Berkeley National Laboratory
Measurements of 11 exploding stars spread throughout the visible universe made by the Hubble Space Telescope confirm an earlier, ground-based study which produced the first evidence that the universe is not only expanding, but expanding at an increasing rate.
The new study, which has been posted online [http://www.arxiv.org/abs/astro-ph/0309368] and will soon appear in the Astrophysical Journal, also provides some tantalizing new insights into the nature of the mysterious repulsive force, dubbed dark energy, that appears to be propelling this run-away expansion.
“As far as the ultimate fate of the universe goes, the most straightforward conclusion is that over the next few billion years it is going to become an increasingly thin, cold and boring place,” says Robert Knop, the assistant professor of physics and astronomy at Vanderbilt University who led the analysis of the supernova data for the Supernova Cosmology Project (SCP), an international collaboration of 48 scientists directed from Lawrence Berkeley National Laboratory in California.
David F. Salisbury | Vanderbilt University
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The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.
The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...
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Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".
Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...
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