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LeopoldS

Current Biology - Evidence that the Lunar Cycle Influences Human Sleep - 0 views

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    First paper I know of that seems to confirm what we see with our daughters since they are born ... Would this also be observable with astronauts? We should have some data from the ISS it seems to me...
johannessimon81

Big Data challenge at NASA - 2 views

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    Relevant to our recent discussion on big data at ESA?
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    relevant yes, though the article gives little information on the "how"
LeopoldS

New Space Applications Supported By Open Data And Crowdsourcing | ESA's ARTES Applications - 4 views

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    Artes-20 embracing crowdsourcing and putting substantial money into it - at least its first step
Thijs Versloot

Innovative solutions based on Earth Observation data #copernicus @esa - 2 views

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    The Earth Monitoring Competition is annually awarding prizes to innovative solutions for business and society based on Earth observation data.
Thijs Versloot

Bicycle airbag #howitworks - 2 views

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    Thousands of cycling accidents were re-enacted using stunt riders and crash-test dummies to collect the specific movement patterns of cyclists in accidents. In parallel, normal cycling data has been collected using test cyclists wearing Hövding in everyday cycling. Based on this collected data, they have developed an algorithm that can distinguish normal cycling from accidents. As you don't want the 399GBP device to inflate when taking a sharp corner...
Thijs Versloot

10Gbits data transmission using #LEDs #LIFI - 0 views

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    UK researchers say they have achieved data transmission speeds of 10Gbit/s via "li-fi" - wireless internet connectivity using light. The researchers used a micro-LED light bulb to transmit 3.5Gbit/s via each of the three primary colours - red, green, blue - that make up white light. This means over 10Gbit/s is possible.
jcunha

Data scientists find connections between birth month and health - 4 views

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    Seems like astrologists were somehow right... Ptolemy would be proud.
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    Greetings from July :-) On an unrelated note... this chart made me suddenly realise I've been always thinking of the year as passing counter-clockwise and starting at the bottom. Very strongly. Seems like some tempo-spatial association. Anybody has a similar feeling?
Juxi Leitner

Inside Google Books: Books of the world, stand up and be counted! All 129,864,880 of you. - 3 views

  • After we exclude serials, we can finally count all the books in the world. There are 129,864,880 of them. At least until Sunday.
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    interesting post on data and knowledge management ;)
pacome delva

Penrose claims to have glimpsed universe before Big Bang - 0 views

  • According to Penrose and Gurzadyan, these circles allow us to "see through" the Big Bang into the aeon that would have existed beforehand. The circles, they say, are the marks left in our aeon by the spherical ripples of gravitational waves that were generated when black holes collided in the previous aeon.
  • Julian Barbour, a visiting professor of physics at the University of Oxford, says that these circles would be "remarkable if real and sensational if they confirm Penrose's theory". They would, he says, "overthrow the standard inflationary picture", which, he adds, has become widely accepted as scientific fact by many cosmologists. But he believes that the result will be "very controversial" and that other researchers will look at the data very critically. He says there are many disputable aspects to the theory
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    hehe, a nice controversy? or completely overinterpreted results...?
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    what the heck is this? sounds strange to me ... would I understand the original paper?
Nina Nadine Ridder

NASA Sets Coverage for GOES-P Weather Satellite Launch on March 2 | SpaceRef - Your Spa... - 0 views

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    launch of satellite to collect data for improvement of ocean models, weather predictions and hurricane forecasts
Dario Izzo

Probabilistic Logic Allows Computer Chip to Run Faster - 3 views

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    Francesco pointed out this research one year ago, we dropped it as noone was really considering it ... but in space a low CPU power consumption is crucial!! Maybe we should look back into this?
  • ...6 more comments...
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    Q1: For the time being, for what purposes computers are mainly used on-board?
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    for navigation, control, data handling and so on .... why?
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    Well, because the point is to identify an application in which such computers would do the job... That could be either an existing application which can be done sufficiently well by such computers or a completely new application which is not already there for instance because of some power consumption constraints... Q2 would be then: for which of these purposes strict determinism of the results is not crucial? As the answer to this may not be obvious, a potential study could address this very issue. For instance one can consider on-board navigation systems with limited accuracy... I may be talking bullshit now, but perhaps in some applications it doesn't matter whether a satellite flies on the exact route but +/-10km to the left/right? ...and so on for the other systems. Another thing is understanding what exactly this probabilistic computing is, and what can be achieved using it (like the result is probabilistic but falls within a defined range of precision), etc. Did they build a complete chip or at least a sub-circiut, or still only logic gates...
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    Satellites use old CPUs also because with the trend of going for higher power modern CPUs are not very convenient from a system design point of view (TBC)... as a consequence the constraints put on on-board algorithms can be demanding. I agree with you that double precision might just not be necessary for a number of applications (navigation also), but I guess we are not talking about 10km as an absolute value, rather to a relative error that can be tolerated at level of (say) 10^-6. All in all you are right a first study should assess what application this would be useful at all.. and at what precision / power levels
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    The interest of this can be a high fault tolerance for some math operations, ... which would have for effect to simplify the job of coders! I don't think this is a good idea regarding power consumption for CPU (strictly speaking). The reason we use old chip is just a matter of qualification for space, not power. For instance a LEON Sparc (e.g. use on some platform for ESA) consumes something like 5mW/MHz so it is definitely not were an engineer will look for some power saving considering a usual 10-15kW spacecraft
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    What about speed then? Seven time faster could allow some real time navigation at higher speed (e.g. velocity of a terminal guidance for an asteroid impactor is limited to 10 km/s ... would a higher velocity be possible with faster processors?) Another issue is the radiation tolerance of the technology ... if the PCMOS are more tolerant to radiation they could get more easily space qualified.....
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    I don't remember what is the speed factor, but I guess this might do it! Although, I remember when using an IMU that you cannot have the data above a given rate (e.g. 20Hz even though the ADC samples the sensor at a little faster rate), so somehow it is not just the CPU that must be re-thought. When I say qualification I also imply the "hardened" phase.
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    I don't know if the (promised) one-order-of-magnitude improvements in power efficiency and performance are enough to justify looking into this. For once, it is not clear to me what embracing this technology would mean from an engineering point of view: does this technology need an entirely new software/hardware stack? If that were the case, in my opinion any potential benefit would be nullified. Also, is it realistic to build an entire self-sufficient chip on this technology? While the precision of floating point computations may be degraded and still be useful, how does all this play with integer arithmetic? Keep in mind that, e.g., in the Linux kernel code floating-point calculations are not even allowed/available... It is probably possible to integrate an "accelerated" low-accuracy floating-point unit together with a traditional CPU, but then again you have more implementation overhead creeping in. Finally, recent processors by Intel (e.g., the Atom) and especially ARM boast really low power-consumption levels, at the same time offering performance-boosting features such as multi-core and vectorization capabilities. Don't such efforts have more potential, if anything because of economical/industrial inertia?
LeopoldS

Common ecology quantifies human insurgency : Article : Nature - 0 views

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    nice paper: like especially: To our knowledge, our model provides the first unified explanation of high-frequency, intra-conflict data across human insurgencies. Other explanations of human insurgency are possible, though any competing theory would also need to replicate the results of Figs 1, 2, 3. Our model's specific mechanisms challenge traditional ideas of insurgency based on rigid hierarchies and networks, whereas its striking similarity to multi-agent financial market models24, 25, 26 hints at a possible link between collective human dynamics in violent and non-violent settings1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19. Top of page
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    There was also this paper ... Power Law Explains Insurgent Violence (http://sciencenow.sciencemag.org/cgi/content/full/2009/1216/1?rss=1)
LeopoldS

Spaceflight Now | Atlas Launch Report | Air Force spaceplane is an odd bird with a twis... - 3 views

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    Juxi are you following this one? any idea on its purpose?
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    Not that I'm an expert in the field in any way, but there are two things I could think of: 1) possibility of bringing the payload back means that it can collect huge amounts of data which wouldn't be possible to be transferred via radio in reasonable time and/or you can bring back data you don't want to be intercepted by enemy 2) I remember reading somewhere that possibility of re-entry from orbit means you can strike any country without violating the airspace of the neighbouring countries. As the project is now managed by military, a purely civil purpose can be safely ruled out in my opinion.
Kevin de Groote

Gartner Adds Big Data, Gamification, and Internet of Things to Its Hype Cycle - 2 views

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    nice idea to bring some structure to the list of IT novelties ...
Francesco Biscani

Slashdot Technology Story | Is Cloud Computing the Hotel California of Tech? - 2 views

  • the cloud is still largely a one-way road into Web services, with closed data networks making it difficult to impossible to move data into competing services
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    also interesting is this article quote: "How big can the cloud get before it starts to rain?" http://hardware.slashdot.org/story/09/09/30/0152200/Amazons-Cloud-May-Provision-50000-VMs-a-Day
nikolas smyrlakis

Google Flu Trends | How does this work? - 1 views

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    Learn about how Google Flu Trends uses aggregated search query data to accurately estimate current flu activity in several countries. - Lead to a Nature paper as well
nikolas smyrlakis

Global Warming To Bring More Rain To Taiwan - Science News - redOrbit - 2 views

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    An interesting aspect of global warming..Was thinking of that today and apparently there are some studies but very limited.Involves a lot of satellite data to measure also moisture etc. in the atmoshpere
LeopoldS

SpaceX Launch Successfully Delivers Satellite Into Orbit | Wired Science | Wired.com - 0 views

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    fantastic step forward! does anybody know how much they actually sell/sold the launch? I could not find good data. The only phrase in the article that I doubt is this one "Satellite launches are a lucrative business" ...
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