ScienceDaily: Top Technology News

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• Method for building artificial tissue devised
• People smile when they are frustrated, and the computer knows the difference
• The Transit of Venus: June 5-6, 2012
• Hubble sees a spiral within a spiral
• Smallest possible five-ringed structure made: 'Olympicene' molecule built using clever synthetic organic chemistry
• Explanation for friction: Origin of sliding friction between solid objects

Method for building artificial tissue devised Posted: 28 May 2012 12:48 PM PDT Physicists have developed a method that models biological cell-to-cell adhesion that could also have industrial applications.

People smile when they are frustrated, and the computer knows the difference Posted: 28 May 2012 12:27 PM PDT Do you smile when you're frustrated? Most people think they don't -- but they actually do, a new study has found. What's more, it turns out that computers programmed with the latest information from this research do a better job of differentiating smiles of delight and frustration than human observers do.

The Transit of Venus: June 5-6, 2012 Posted: 28 May 2012 09:24 AM PDT Many astronomers and members of the public in Britain will be getting up early on the morning of June 6, so they can see (using precautions to avoid permanent eye damage) the final Transit of Venus of the 21st century. The Transit, when Venus passes directly between Earth and the Sun, was last seen in 2004 and will not happen again until the year 2117.

Hubble sees a spiral within a spiral Posted: 28 May 2012 07:50 AM PDT NASA's Hubble Space Telescope captured a new image of the spiral galaxy known as ESO 498-G5. One interesting feature of this galaxy is that its spiral arms wind all the way into the center, so that ESO 498-G5's core looks like a bit like a miniature spiral galaxy. This sort of structure is in contrast to the elliptical star-filled centers (or bulges) of many other spiral galaxies, which instead appear as glowing masses.

Smallest possible five-ringed structure made: 'Olympicene' molecule built using clever synthetic organic chemistry Posted: 28 May 2012 07:02 AM PDT Scientists have created and imaged the smallest possible five-ringed structure -- about 100,000 times thinner than a human hair. Dubbed 'olympicene', the single molecule was brought to life in a picture thanks to a combination of clever synthetic chemistry and state-of-the-art imaging techniques.

Explanation for friction: Origin of sliding friction between solid objects Posted: 28 May 2012 07:02 AM PDT Friction is a key phenomenon in applied physics, whose origin has been studied for centuries. Until now, it has been understood that mechanical wear-resistance and fluid lubrication affect friction, but the fundamental origin of sliding friction has been unknown. Scientists have now explained the origin of sliding friction between solid objects. According to his theory, the amount of friction depends on the surface energy of the materials in question.

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