samedi 28 juillet 2012

Radiation Damage Bigger Problem in Microelectronics Than Previously Thought

Vanderbilt University
(07/19/12) David Salisbury

Vanderbilt University researchers have found that the amount of damage that radiation inflicts on electronic materials could be at least 10 times greater than previously thought, thanks to a new characterization method that uses a combination of lasers and acoustic waves to provide scientists with a way to look through solid materials to identify the size and location of defects. The new method can detect disruption in the positions of the electrons attached to atoms, which is important because it is the behavior of the electrons that determine a material's electrical and optical properties. The researchers upgraded a 15-year-old method called coherent acoustic phonon spectroscopy to detect the electron dislocations. The researchers tested their technique on a layer of gallium arsenide semiconductor that they had irradiated with high-energy neon atoms and found the structural damage caused by an embedded neon atom spread over a 1,000-atom volume. "Techniques like the one that we have developed will give us the detailed information we need to figure this out and so help people make nanodevices that work properly," says Vanderbilt professor Norman Tolk.

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samedi 14 juillet 2012

Fwd: La newsletter des professionnels en informatique du 03/07/2012

03/07 Un clavier virtuel incurvé pour Windows Phone 8 et 7.8 pour taper à une main ? La fonction testée par Microsoft Research

vendredi 13 juillet 2012

Android, roi de l'Europe, Windows Phone en progrès

>50% de parts de marchés

mercredi 11 juillet 2012

CORRECTED DELIVERY: Debian Developers Discuss UEFI SecureBoot Plans

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Debian Developers Discuss UEFI SecureBoot Plans

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mercredi 4 juillet 2012

Silicon Valley's Top Threat Is China, Survey Finds

Computerworld (06/28/12) Patrick Thibodeau

Many high-level technology executives are convinced that some other country, probably China, will supplant Silicon Valley as the global center for innovation within the next four years, according to a KPMG survey of 668 executives.  The finding that 44 percent of respondents expected this shift was surprising to KPMG's Gary Matuszak, but he notes that 42 percent of survey participants were from the Asia-Pacific region.  Among U.S. respondents, 28 percent also think Silicon Valley will lose its status as the world's innovation hub, while 39 percent do not.  Matuszak says the survey's chief observation is not a diminishing in Silicon Valley's leadership, but rather greater emphasis on innovation in other parts of the world.  He stresses that Silicon Valley stands apart by virtue of an entire ecosystem built up to support innovation, which another region would find very difficult to duplicate.  Information Technology Innovation Foundation president Robert Atkinson says that even if Chinese-owned companies do not become innovation leaders, the Chinese economy "may become an innovation leader if its policies result in foreign multinationals moving even more innovation-based activities to China."  He says China wants "to make virtually everything, especially advanced technology products and services."