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Probability maps help sniff out food contamination

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Tracking down the source of fresh food contamination can be difficult and time-consuming. (Credit: Photo by Randy Montoya)

TechAndComputer (Sep. 27, 2012) — Uncovering the sources of fresh food contamination could become faster and easier thanks to analysis done at Sandia National Laboratories' National Infrastructure Simulation and Analysis Center (NISAC).

The study, in the International Journal of Critical Infrastructures, demonstrates how developing a probability map of the food supply network using stochastic network representation might shorten the time it takes to track down contaminated food sources.

Stochastic mapping shows what is known about how product flows through the distribution...

New tool for CSI? Geographic software maps distinctive features inside bones

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This polarized microscope image shows a cross-section of a metatarsal, or long foot bone. White spots on the periphery of the bone are osteons -- structures that fix small cracks in bone and maintain mineral levels in our blood. (Credit: Image by David Rose.)

TechAndComputer (Sep. 25, 2012) — A common type of geographic mapping software offers a new way to study human remains.

In a recent issue of the American Journal of Physical Anthropology, researchers...

Novel materials become multifunctional at ultimate quantum limit

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TechAndComputer (Sep. 25, 2012) — A University of Arkansas physicist and his colleagues have examined the lower limits of novel materials called complex oxides and discovered that unlike conventional semiconductors the materials not only conduct electricity, but also develop unusual magnetic properties.

Jak Chakhalian, Jian Liu, Derek Meyers and Benjamin Gray of the University of Arkansas and John W. Freeland and Phillip Ryan of the Advanced Photon Source at Argonne National...

Ultra fast optical amplifier: Silicon and erbium on one chip for the first time

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Image of the chip including silicon optical waveguide (SOI: silicon on insulator) as well as erbium-doped aluminium oxyde. (Credit: Image courtesy of University of Twente)

TechAndComputer (Sep. 21, 2012) — Within optical microchips, light finds its way through channels, waveguides, made of silicon. Light from a glass fiber, for example, is led through a structure of optical channels with splitters and couplers. Silicon is the workhorse for this, but it is still...

Researchers develop rapid method to measure carbon footprints

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TechAndComputer (Sep. 13, 2012) — Researchers have developed new software that can rapidly calculate the carbon footprints of thousands of products simultaneously, a process that up to now has been time consuming and expensive. The methodology should help companies to accurately label products, and to design ways to reduce their environmental impacts, said Christoph Meinrenken, the project's leader and associate research scientist at Columbia University's Earth Institute and Columbia...