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Mathematical Modeling

Modeling the breaking points of metallic glasses

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A simulation of crack initiation in a metallic glass. The metallic glass on the left is initially more relaxed, due to a longer heat treatment, than the metallic glass on the right. The very different crack tip shapes and deformation patterns under the same external conditions result in a significantly reduced breaking resistance for the more relaxed glass. (Credit: Courtesy of Christopher Rycroft, Berkeley Lab)

TechAndComputer (Nov. 26, 2012) — Metallic glass alloys (or liquid metals) are three times stronger than the best industrial steel, but can be molded into complex shapes with the same ease as plastic. These materials are highly resistant to scratching, denting, shattering and corrosion. So far, they have...

In financial ecosystems, big banks trample economic habitats and spread fiscal disease

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Like the impact of an elephant herd grazing on grassland, multinational banks shape the financial environment to an extent that far outweighs their small number. And like a contagious person on a transnational flight, when these giant, interconnected banks succumb to financial ills, they are uniquely positioned to infect wide swaths of the financial system. (Credit: © catfish07 / Fotolia)

TechAndComputer (Nov. 14, 2012) — Like the impact of an elephant herd...

Not so fast: Economic growth will be steady no matter who's the next president

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TechAndComputer (Nov. 5, 2012) — There's no doubt that the economy is the deciding factor for many voters. Americans are looking to presidential candidates for a fast remedy, but the reality will be far less immediate, according to Saint Joseph's University economist Benjamin Liebman, Ph.D.

"The economy is already slowly improving, and probably will continue to do so, regardless of who's elected," he says. "What's reasonable for the candidates to promise is that they will help...

Hurricane Sandy: Power outage prediction model was accurate

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TechAndComputer (Nov. 1, 2012) — A team of researchers at Johns Hopkins and Texas A&M universities spent days tracking Hurricane Sandy's power outage potential as the storm made its deadly march up eastern seaboard. Seth Guikema, an engineer at Johns Hopkins, and Steven Quiring, a geographer at Texas A&M, fed weather forecasts as well as real-time and historic hurricane data into a computer model to predict the total number of power outages. How'd they do?


Titan supercomputer debuts: Computer churns through more than 20,000 trillion calculations each second

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Oak Ridge National Laboratory is home to Titan, the world’s most powerful supercomputer for open science with a theoretical peak performance exceeding 20 petaflops (quadrillion calculations per second). That kind of computational capability—almost unimaginable—is on par with each of the world’s 7 billion people being able to carry out 3 million calculations per second. (Credit: Image courtesy of Oak Ridge National Laboratory)