ScienceDaily: Engineering and Construction News

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• Heavy metals and hydroelectricity
• 'Active' surfaces control what's on them: Scientists develop treated surfaces that can actively control how fluids or particles move
• Light pulses control graphene's electrical behavior
• Superconductors: Physical link to strange electronic behavior

Heavy metals and hydroelectricity Posted: 01 Aug 2014 07:50 AM PDT Hydraulic engineering is increasingly relied on for hydroelectricity generation. However, redirecting stream flow can yield unintended consequences. Researchers from the U.S. and Peru have documented the wholesale contamination of the Lake Junín National Reserve by acid mine drainage from the Cerro de Pasco mining district.

'Active' surfaces control what's on them: Scientists develop treated surfaces that can actively control how fluids or particles move Posted: 01 Aug 2014 07:50 AM PDT Researchers have developed a new way of making surfaces that can actively control how fluids or particles move across them. The work might enable new kinds of biomedical or microfluidic devices, or solar panels that could automatically clean themselves of dust and grit.

Light pulses control graphene's electrical behavior Posted: 01 Aug 2014 06:12 AM PDT Graphene, an ultrathin form of carbon with exceptional electrical, optical, and mechanical properties, has become a focus of research on a variety of potential uses. Now researchers have found a way to control how the material conducts electricity by using extremely short light pulses, which could enable its use as a broadband light detector. These findingsx could allow ultrafast switching of conduction, and possibly lead to new broadband light sensors.

Superconductors: Physical link to strange electronic behavior Posted: 31 Jul 2014 05:16 PM PDT Scientists have new clues this week about one of the baffling electronic properties of the iron-based high-temperature superconductor barium iron nickel arsenide. Scientists have the first evidence, based on sophisticated neutron measurements, of a link between magnetic properties and the material's tendency, at sufficiently low temperatures, to become a better conductor of electricity in some directions than in others.

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