An article in the November 2007 issue of BioScience describes the history and summarizes the benefits and challenges of green roofs—roofs with a vegetated surface and substrate.
Although more expensive to construct than a typical roof, a green roof can reduce energy costs during a building’s lifetime and control storm-water runoff. Green roofs also provide havens for wildlife. Such structures are currently less common in the United States than in Japan and some European countries, notably Germany, and proponents urge their more widespread adoption.
The authors of the article, Erica Oberndorfer and her colleagues, argue for further research into the functioning of green roof ecosystems and into which plant species are most beneficial to include in roof plantings. The researchers note that the development of improved cost-benefit models for green roofs could spur the more widespread adoption of the technology.
A photograph of the dramatic, almost-complete green roof on the new California Academy of Sciences building in San Francisco appears on the cover of issue.
Jennifer Williams | EurekAlert!
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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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