Tech

All directions are not created equal for nanoscale heat sources

All directions are not created equal for nanoscale heat sources

Thermal considerations are rapidly becoming one of the most serious design constraints in microelectronics, especially on submicron scale lengths. A study by researchers from the University of Illinois at Urbana-Champaign has shown that standard thermal models will lead to the wrong answer in a three-dimensional heat-transfer problem if the dimensions of the heating element are on the order of one micron or smaller.

Microbes in Central Park soil: If they can make it there, they can make it anywhere

Microbes in Central Park soil: If they can make it there, they can make it anywhere

Soil microbes that thrive in the deserts, rainforests, prairies and forests of the world can also be found living beneath New York City's Central Park, according to a surprising new study led by Colorado State University and the University of Colorado Boulder.

The research team analyzed 596 soil samples collected from across Central Park's 843 acres and discovered a stunning diversity of below-ground life, most of which had never been documented before.

Ultrafast remote switching of light emission

Ultrafast remote switching of light emission

The researchers etched a photonic crystal around several quantum dots in a semiconductor layer. Quantum dots are small structures that spontaneously emit light as a consequence of atomic processes. If a short laser pulse is fired at the photonic crystal, its refractive index is modified and the quantum dot experiences a change in the electromagnetic field around it. This change can speed up or slow down the emission of light by the dot. As soon as the refractive index recovers its usual value, the dot emits light again in the normal manner.

A new dimension for integrated circuits: 3-D nanomagnetic logic

A new dimension for integrated circuits: 3-D nanomagnetic logic

Risky metabolism

Risky metabolism

This news release is available in German.

Fires in Papua, Indonesia and New Guinea

Fires in Papua, Indonesia and New Guinea

According to a NASA story from 2009, "human activities in this area of the world have contributed to the growing fire emissions issue. Palm oil is increasingly grown for use as a cooking oil and biofuel, while also replacing trans fats in processed foods. It has become the most widely produced edible oil in the world, and production has swelled in recent years to surpass that of soybean oil.

2013 Colorado front range flood: Debris-flow a major hazard

2013 Colorado front range flood: Debris-flow a major hazard

Boulder, Colorado, USA – Massive flooding in Colorado in September 2013, and the concomitant landslides and debris flows, caused widespread damage across the Front Range. In the October issue of GSA Today, Jeffrey Coe, Jason Kean, Jonathan Godt, Rex Baum, and Eric Jones at the U.S. Geological Survey; David Gochis at the National Center for Atmospheric Research; and Gregory Anderson of the Boulder Mountain Fire Protection District present insights on hazard assessment gained from this extraordinary debris-flow event.

Investigating the 'underground' habitat of Listeria bacteria

Investigating the 'underground' habitat of Listeria bacteria

The literature describes Listeria as ubiquitous bacteria with widespread occurrence. Yet they only become a problem for humans and animals when they contaminate food processing facilities, multiply, and enter the food chain in high concentrations. An infection with Listeria monocytogenes can even be fatal for humans or animals with weakened immune systems.

Listeria in soil or water are not dangerous

Gender equality leads to more Olympic medals for men and women

Gender equality boosts a country's Olympic medal count for both women and men, shows a new study from the University of British Columbia.

Drawing data from the World Economic Forum's 2013 Global Gender Gap Report, researchers compared a country's tendency toward sexual equality with its medal counts from the London 2012 Olympic Games and the Sochi 2014 Olympic Winter Games.

Countries with greater parity – particularly for measures of educational equality – had more women and men reach the podium.

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