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tvinko

Network traffic in US - 1 views

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    p2p is still massive and seems to be constant, but real-time entertainment is taking over. More details here: http://www.sandvine.com/downloads/documents/05-17-2011_phenomena/Sandvine%20Global%20Internet%20Phenomena%20Report.pdf
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    how reliable is this ... looks strange that e.g. secure tunneling and social networking are diminuing, isn't it?
nikolas smyrlakis

YouTube - Piano stairs - TheFunTheory.com - Rolighetsteorin.se - 0 views

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    Changing people's behaviour through fun. Looks a bit naive, but if there are any ideas http://www.thefuntheory.com there's an ongoing competition until the 15th of Nov.
Tobias Seidl

iWise - 0 views

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    This is the Web 3.0-version of a bullshit generation. Much fun though. Here an article about it: http://www.techcrunch.com/2009/07/20/iwise-is-twitter-for-dead-people/
LeopoldS

Google-Ergebnis für http://www.umerc.umd.edu/research/images/efficiency06.png - 0 views

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    electric grid modelling .... Nikolaos could you have a look at this?
ESA ACT

Neurobiology: The currency of guessing : Article : Nature - 0 views

ESA ACT

Google Image resultaat voor http://www.sciencedaily.com/images/2004/07/040729092403.jpg - 0 views

shared by ESA ACT on 24 Apr 09 - No Cached
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    IR sensor from the fire beetle
ESA ACT

Gecko's tail... a new way of reaching stability. Possible space uses - 0 views

ESA ACT

ACPD - Papers in Open Discussion - 0 views

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    Useful journal for the upcoming Earth Systems Science. For geoengineering, check out this: http://www.atmos-chem-phys-discuss.net/9/2559/2009/acpd-9-2559-2009.pdf (currently first on the list of this bookmark)
Nina Nadine Ridder

Big bang goes phut as bird drops baguette into Cern machinery | Science | The Guardian - 4 views

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    Maybe the prediction that "all Higgs producing machines shall have bad luck" (http://www.nytimes.com/2009/10/13/science/space/13lhc.html?_r=2) is true after all...
nikolas smyrlakis

Logicomix: an epic search for truth - 1 views

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    an interesting comic about maths, ideas etc. Co-written by a greek mathematician / writer and a Berkeley computer science professor, sold out in Greece and since its international release a couple of months ago is occupying the top selling comics lists of Amazon etc. also: http://www.logicomix.com/en/index.php?option=com_content&view=frontpage&Itemid=53
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    btw I just ordered it from Amazon, so if you want after I finish it I can lend it
Luís F. Simões

Allen Institute for brain science announces first comprehensive gene map of the human b... - 6 views

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    http://www.brain-map.org/ yummy! brains...
LeopoldS

Evolution: Selection for positive illusions : Nature : Nature Publishing Group - 4 views

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    Let's keep going then ...
Luís F. Simões

Geoffrey West: The surprising math of cities and corporations | Video on TED.com - 3 views

  • Physicist Geoffrey West has found that simple, mathematical laws govern the properties of cities -- that wealth, crime rate, walking speed and many other aspects of a city can be deduced from a single number: the city's population. In this mind-bending talk from TEDGlobal he shows how it works and how similar laws hold for organisms and corporations.
  • For those who felt that Geoffrey glossed over the implications for cities and companies, the following article in the New York Times did a respectable job of drawing conclusions from Dr. West's paper: http://www.nytimes.com/2010/12/19/magazine/19Urban_West-t.html
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    Tokyo has a very large population and one of the smallest crime rates in the world, in fact Tokyo is known to be the safest big city in the world (w.r.t. crime). It is hard to believe that the crime rate in L.A. is in the same order of magnitude.
Marcus Maertens

BBC News - Comedy club charges per laugh with facial recognition - 4 views

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    Also check out this one: https://www.youtube.com/watch?feature=player_embedded&v=V0FowbxEe3w. I like the "pay for wtf?" concept.
jcunha

Wireless 10 kW power transmission - 1 views

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    Mitsubishi Heavy Industries said Friday that it has succeeded in transmitting 10 kW of power through 500 m. An announcement that comes just after JAXA scientists reported one more breakthrough in the quest for Space Solar Power Systems (http://phys.org/news/2015-03-japan-space-scientists-wireless-energy.html). One step closer to Power Generation from Space/
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    from the press release (https://www.mhi-global.com/news/story/1503121879.html) "10 kilowatts (kW) of power was sent from a transmitting unit by microwave. The reception of power was confirmed at a receiver unit located at a distance of 500 meters (m) away by the illumination of LED lights, using part of power transmitted". So 10kW of transmission to light a few efficient LED lights??? In a 2011 report (https://www.mhi-global.com/company/technology/review/pdf/e484/e484017.pdf), MHI estimated this would generate the same electricity output as a 400-megawatt thermal plant - or enough to serve more than 150,000 homes during peak hours. The price? The same as publicly supplied power, according to its calculations. There are no results to boost these claims however. The main work they do now is focused on beam steering control. I guess the real application in mind is more targeted to terrestrial applications, eg wireless highway charging (http://www.bbc.com/future/story/20120312-wireless-highway-to-charge-cars). With the distances so much shorter, leading to much smaller antenna's and rectenna's this makes much more sense to me to develop.
Paul N

Have We Been Interpreting Quantum Mechanics Wrong This Whole Time? - 6 views

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    "The experiments involve an oil droplet that bounces along the surface of a liquid. The droplet gently sloshes the liquid with every bounce. At the same time, ripples from past bounces affect its course. The droplet's interaction with its own ripples, which form what's known as a pilot wave, causes it to exhibit behaviors previously thought to be peculiar to elementary particles - including behaviors seen as evidence that these particles are spread through space like waves, without any specific location, until they are measured." Pilot-wave theory reresurrected. Maybe something for the next "fundamental" :P physics RF?
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    And for the next 'Experimental Physics Stagiaire' position why not try to do "Unpredictable Tunneling of a Classical Wave-Particle Association" http://stilton.tnw.utwente.nl/people/eddi/Papers/PhysRevLett_TUNNEL.pdf, there are some rumors online that the results of Yves Couder Experiments can be reproduced with simple DIY vibrating tables! It is very funny to see the videos of the MIT's replication of this experiment (with lightening legends for those who are uncomfortable with the concepts involved https://www.youtube.com/watch?v=YF5iHQMjcsM)
jcunha

Holographic acoustic elements for manipulation of levitated objects - 0 views

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    Cool scientific and technical feat in engineering a tractor beam. See the explanation video here http://www.nature.com/ncomms/2015/151027/ncomms9661/extref/ncomms9661-s3.mov and the thing working in real time here http://www.nature.com/ncomms/2015/151027/ncomms9661/extref/ncomms9661-s2.mov
jcunha

'Superman memory crystal' that could store 360TB of data forever | ExtremeTech - 0 views

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    A new so called 5D data storage that could potentially survive for billions of years. The research consists of nanostructured glass that can record digital data in five dimensions using femtosecond laser writing.
  • ...2 more comments...
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    Very scarce scientific info available.. I'm very curious to see a bit more in future. From https://spie.org/PWL/conferencedetails/laser-micro-nanoprocessing I made a back of envelop calc: for 20 nm spaced, each laser spot in 5D encryption encodes 3 bits (it seemed to me) written in 3 planes, to obtain the claimed 360TB disk one needs very roughly 6000mm2, which does not complain with the dimensions shown in video. Only with larger number of planes (order of magnitude higher) it could be.. Also, at current commercial trends NAND Flash and HDD allow for 1000 Gb/in2. This means a 360 TB could hypothetically fit in 1800mm2.
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    I had the same issue with the numbers when I saw the announcement a few days back (https://www.southampton.ac.uk/news/2016/02/5d-data-storage-update.page). It doesn't seem to add up. Plus, the examples they show are super low amounts of data (the bible probably fits on a few 1.44 MB floppy disk). As for the comparison with NAND and HDD, I think the main argument for their crystal is that it is supposedly more durable. HDDs are chronically bad at long term storage, and also NAND as far as I know needs to be refreshed frequently.
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    Yes Alex, indeed, the durability is the point I think they highlight and focus on (besides the fact the abstract says something as the extrapolated decay time being comparable to the age of the Universe..). Indeed memories face problems with retention time. Most of the disks retain the information up to 10 years. When enterprises want to store data for longer times than this they use... yeah, magnetic tapes :-). Check a interesting article about magnetic tape market revival here http://www.information-age.com/technology/data-centre-and-it-infrastructure/123458854/rise-fall-and-re-rise-magnetic-tape I compared for fun, to have one idea of what we were talking about. I am also very curious so see the writing and reading times in this new memory :)
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    But how can glass store the information so long? Glass is not even solid?!
LeopoldS

Increased core body temperature in astronauts during long-duration space missions | Sci... - 0 views

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    38 degree core body temp in microgravity stabilised after 2 months - due to reduced conv. heat transfer+evaporation https://www.nature.com/articles/s41598-017-15560-w
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    so that's hypopyrexia (augmented concentrations of interleukin-1 receptor antagonist) AND hypothermia (convection/evaportation)? what puzzles me is that temperatures take so long to return to baseline after astronauts return to earth.
jcunha

'Disruptive' science has declined - 2 views

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    About "Papers and patents are becoming less disruptive over time" https://www.nature.com/articles/s41586-022-05543-x. "Overall, our results deepen understanding of the evolution of knowledge and may guide career planning and science policy. To promote disruptive science and technology, scholars may be encouraged to read widely and given time to keep up with the rapidly expanding knowledge frontier. Universities may forgo the focus on quantity, and more strongly reward research quality56, and perhaps more fully subsidize year-long sabbaticals. Federal agencies may invest in the riskier and longer-term individual awards that support careers and not simply specific projects57, giving scholars the gift of time needed to step outside the fray, inoculate themselves from the publish or perish culture, and produce truly consequential work. Understanding the decline in disruptive science and technology more fully permits a much-needed rethinking of strategies for organizing the production of science and technology in the future."
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