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tvinko

Wikipedia's Participation Challenge - 2 views

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    Interesting competition: predicting the future of editing activity on Wikipedia
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    I doubt that this can work...
Luís F. Simões

Google AI Challenge: Ants - 2 views

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    "Ants is a multi-player strategy game set on a plot of dirt with water for obstacles and food that randomly drops. Each player has one or more hills where ants will spawn. The objective is for players to seek and destroy the most enemy ant hills while defending their own hills. Players must also gather food to spawn more ants, however, if all of a player's hills are destroyed they can't spawn any more ants."
jcunha

Metals used in high-tech products face future supply risks - 0 views

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    First peer review study about he criticality of rare-earth metals. It can be read "They found that supply limits for many metals critical in the emerging electronics sector (including gallium and selenium) are the result of supply risks. The environmental implications of mining and processing present the greatest challenges with platinum-group metals, gold, and mercury. For steel alloying elements (including chromium and niobium) and elements used in high-temperature alloys (tungsten and molybdenum), the greatest vulnerabilities are associated with supply restrictions" Questions about estimation apart, this can be a valuable market for asteroid mining.. (ot just more market for Infinium-like companies http://www.technologyreview.com/news/527526/a-cleaner-cheaper-way-to-make-metals/).
Alexander Wittig

The Effort to Turn Martian Soil Into Rock Solid Concrete - 4 views

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    Sounds like an interesting building material. Unlike concrete, after use it can simply be molten down (at seemingly reasonable temperatures) and used again to build different parts. Crack in the wall? Just iron it out (literally)! A group at Northwestern University wants to solve an engineering challenge now to prepare for the future: it's turning Mars-like soil into concrete. And, in turn, that concrete requires very little (if any) water. It's just the thing we may need to make life on Mars sustainable.
Luís F. Simões

Nature's special issue on Interdisciplinarity - 2 views

  • Nature’s special issue probes how scientists and social scientists are coming together to solve the grand challenges of energy, food, water, climate and health. This special scrutinizes the data on interdisciplinary work and looks at its history, meaning and funding. A case study and a reappraisal of the Victorian explorer Richard Francis Burton explore the rewards of breaking down boundaries. Meanwhile, a sustainability institute shares its principles for researchers who work across disciplines. Thus inspired, we invite readers to test their polymathy in our lighthearted quiz.
jaihobah

The Nanodevice Aiming to Replace the Field Effect Transistor - 2 views

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    very nice! "For a start, the wires operate well as switches that by some measures compare well to field effect transistors. For example they allow a million times more current to flow when they are on compared with off when operating at a voltage of about 1.5 V. "[A light effect transistor] can replicate the basic switching function of the modern field effect transistor with competitive (and potentially improved) characteristics," say Marmon and co. But they wires also have entirely new capabilities. The device works as an optical amplifier and can also perform basic logic operations by using two or more laser beams rather than one. That's something a single field effect transistor cannot do."
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    The good thing about using CdSe NW (used here) is that they show a photon-to-current efficiency window around the visible wavelengths, therefore any visible light can in principle be used in this application to switch the transistor on/off. I don't agree with the moto "Nanowires are also simpler than field effect transistors and so they're potentially cheaper and easier to make." Yes, they are simple, yet for applications, fabricating devices with them consistently is very challenging (being the research effort not cheap at all..) and asks for improvements and breakthroughs in the fabrication process.
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    any idea how the shine the light selectively to such small surfaces?
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    "Illumination sources consisted of halogen light, 532.016, 441.6, and 325 nm lasers ported through a Horiba LabRAM HR800 confocal Raman system with an internal 632.8 nm laser. Due to limited probe spacing for electrical measurements, all illumination sources were focused through a 50x long working distance (LWD) objective lens (N.A. = 0.50), except 325 nm, which went through a 10x MPLAN objective lens (N.A. = 0.25)." Laser spot size calculated from optical diffraction formula 1.22*lambda/NA
Dario Izzo

The chips are down for Moore's law : Nature News & Comment - 4 views

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    Super lol for all those who abused of the law in their slides / opinions / decisions ..
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    I used the law in some slides :-)! This sentence is more or less the summary "The end of Moore's law is not a technical issue, it is an economic issue,". As Moore's himself recognized last year, the Moore's law itself is a pretty wild extrapolation of one exponential growth when there were only 5 experimental points. It is remarkable however how the semiconductor industry grabbed this and made every single effort to make it true. This effort was rewarded by turning semiconductor industry into one of the most important industries worldwide. Now these are challenging times indeed, and "when tide is gone, we realize who was swimming naked"...
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    The "law" is one of the most successful concrete predictions of the technological future... Still very impressive and a lot more long-lived than Moore had probably ever dreamed of :)
Alexander Wittig

Telstra free data guy devours almost one terabyte in a day - 2 views

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    When Australian mobile provider Telstra offered its mobile customers unlimited data for two separate days this year as compensation for network outages, some customers took it as a challenge to download as much as they possibly could in one day. On Sunday, 27-year-old Sydney resident John Szaszvari outdid himself and everyone else by ploughing through almost a whole terabyte of data.
Paul N

A look at deep learning for science - 1 views

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    Scientific use cases show promise, but challenges remain for complex data analytics.
jaihobah

Artificial Neural Nets Grow Brainlike Navigation Cells - 0 views

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    Faced with a navigational challenge, neural networks spontaneously evolved units resembling the grid cells that help living animals find their way.
darioizzo2

ESA - Telescope-peering AI challenged to spot mystery space objects - 0 views

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    spotGEO competition ... spread the news!
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