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Story tips from the Department of Energy's Oak Ridge National Laboratory
Date:5/10/2011

ed by Oak Ridge National Laboratory researchers to dramatically increase a supercomputer's functionality is providing fusion and climate researchers with the potential to solve problems faster than ever. By using the Integrated Plasma Simulator, a specialized application, combined with Parareal, a mathematical formula that outlines steps to solve a problem, Lee Berry expects researchers to be able to keep pace with the ever-increasing power of supercomputers. "These advances have opened new opportunities to advance our simulation portfolio," said Berry, a member of ORNL's Fusion Energy Division. "For example, discussions are under way to apply this new capability to climate models." [Contact: Ron Walli, (865) 576-0226; wallira@ornl.gov]

MATERIALS -- Details of disorder . . .

Ultrasonic imaging and submarine sonar technologies often rely on materials called ferroelectric relaxors, which are known for their unique electromechanical properties. A study published in Advanced Functional Materials from a team including Oak Ridge National Laboratory has revealed several mechanisms behind the material's behavior. Instead of having one order parameter which describes how a material transitions between different phases the relaxors exhibit two order parameters. "This strange effect happens because disorder makes the material more complex. It is very unusual and interesting because classical theories simply do not consider this type of behavior," ORNL co-author Sergei Kalinin said. Researchers say that understanding the materials' underlying mechanisms could help develop and improve relaxor devices for applications in sensing, imaging and energy harvesting. [Contact: Morgan McCorkle, (865) 574-7308; mccorkleml@ornl.gov]


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Contact: Ron Walli
wallira@ornl.gov
865-576-0226
DOE/Oak Ridge National Laboratory
Source:Eurekalert

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