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User: Arkh89

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Comments · 262

  1. Re:Uh, what? on Khronos Group Announces Vulkan To Compete Against DirectX 12 · · Score: 1

    No, the driver does not run a virtual machine. It has to recompile the bytecode in whatever-type-of-assembly the targeted GPU is taking.

  2. Re:Good grief... on Bill Nye Disses "Regular" Software Writers' Science Knowledge · · Score: 2

    Note that these rankings are only good for the Anglo-american model of higher-education...

  3. A nice piece of... on 'Babar' Malware Attributed To France · · Score: 5, Funny

    The first ever malware to work only 35 hours a week...

  4. Re:You don't say! on Low Vaccination Rates At Silicon Valley Daycare Facilities · · Score: 4, Informative

    Do not confuse average and median .

  5. Re:What's more irritating? on One In Five Developers Now Works On IoT Projects · · Score: 1

    Wait for that Cloud of Things...

  6. Not new... on Proposed Space Telescope Uses Huge Opaque Disk To Surpass Hubble · · Score: -1

    People had this idea for a long time : cf. this article.

  7. Re:But then don't some have to go FASTER than ligh on Scientists Slow the Speed of Light · · Score: 1

    May be, but only for a very short period of time, otherwise the average speed would be increasing or decreasing. So in average they might all move at c/n (in medium of index n) but on a very short time scale they might go slightly faster, or slightly slower, just not always faster or slower...

  8. Holograms? on Hands On With Microsoft's Holographic Goggles · · Score: 4, Insightful

    No, it is still not holography. It has exactly nothing to do with holography.

  9. Re:This has been know for a while... on Astronomers Record Mystery Radio Signals From 5.5 Billion Light Years Away · · Score: 4, Funny

    Civilizations who do not have control over quantum entanglement, Use compressed radio bursts at unbelievable magnitude to transfer massive amounts of information across multiple civilizations simultaneously.

    Wait.... Do you think that this is Bennett Haselton transferring is next article to Slashdot Editors???

  10. Dial-up on Ask Slashdot: Sounds We Don't Hear Any More? · · Score: 1, Insightful

    Dial-up connection sound.
    Somewhat recent...

  11. Re:Can we make fum on Jesus and jews? on Publications Divided On Self-Censorship After Terrorist Attack · · Score: 1
  12. Re:Can we make fum on Jesus and jews? on Publications Divided On Self-Censorship After Terrorist Attack · · Score: 4, Informative

    You mean like these ones?
    It's hard to receive money from jerks!
    Having diner with assholes.
    Pope 23 and his three dadies.
    The Talmud is horseshit.
    Will do anything to get new customers!
    Next week, I will show you the resurrection trick

    Yeah, these guys went down on the extremists of some religions (the Christians, The Muslims and The Jews, the current largest in France) just as much as they did on politics, celebrities, social conflicts and others...
    Growing up there, I saw plenty of these cartoons. Some are not very funny, some are, some are very intelligent, some very dumb... but if the one thing I remember is that : if it hurts you at some point, it means that there is a layer of truth deep down.

    Monde de merde...

  13. Re:Take a look at Sager Systems on Ask Slashdot: High-Performance Laptop That Doesn't Overheat? · · Score: 1

    Sager is just re-branding and re-naming Clevo's barebones.

  14. These temperatures are Ok in the mobile world on Ask Slashdot: High-Performance Laptop That Doesn't Overheat? · · Score: 3, Informative

    I have this kind of laptop (an old Clevo D900F with a desktop Core I7 950). And those are the normal temperatures of the current gen (even old gen) under load. The new Clevo series (P650/670 SE/SG) are said to run cooler, maybe in the 60-70 range. But this comes at the cost of having both CPU and GPU soldered to the MB. Do not expect ANYTHING lower, even over the next year in the laptop market.

    Consider elevating your laptop, or even using a cooler. It might help reducing from a couple of degrees to about 5.

  15. HST's M31 vs R.Gendler's M31 on Hubble Takes Amazing New Images of Andromeda, Pillars of Creation · · Score: 2

    This image is so cool : http://hubblesite.org/newscent...
    Robert Gendler's gallery is visible here

  16. Not transparent... on Jaguar and Land Rover Just Created Transparent Pillars For Cars · · Score: 4, Informative

    Not transparent... but "augmented".
    (misleading title, sloppy journalistic work... as always)

  17. Re:By Kids Ages on Ask Slashdot: Best Software For Image Organization? · · Score: 2

    On a side note : IMO, You should have started indexing your kids at 0...

  18. An Algorithm To Prevent Slashdot... on An Algorithm To Prevent Twitter Hashtag Degeneration · · Score: 4, Insightful

    An Algorithm To Prevent Slashdot's Bennett-Haselton-Degeneration...

    Yeah, we need one...

  19. Re:Yeah, but black and white on The Fastest Camera Ever Made Captures 100 Billion Frames Per Second · · Score: 1

    They acquire only for a very very short lapse of time (in the order of a ps) and perform compression before the acquisition (compressed-sensing).
    They cannot record longer than this because of how slow the sensor in the back of the streak camera is.

  20. Re:Single-pixel what? on Single Pixel Camera Takes Images Through Breast Tissue · · Score: 5, Informative

    Ok, let's say that you want to build a 1 "mega-pixel" camera (1000x1000 pixels, for instance). You have the optics but not the sensor array. Instead, you only have a single photo-diode... which is basically a single pixel.

    First approach : you decide to scan the image plane with this photo-diode, trading spatial resolution for time. You move the photo-diode to where the first pixel in the top-left corner of the sensor should be, integrate (collect the photons) for some time, then move to the second pixel position. After making 1 million of such movements/integrations, you have fully sampled the image plane and have a complete 1 "mega-pixel" image.
    Problem : this is slow as hell, you need to move the photo-diode up to some accuracy, etc.

    Second approach : instead of moving the photo-diode you will modulate the incoming signal (photons) and integrate everything to this detector. You take a small video projector and open it to find a component called a DMD which is an array of controllable bistable micro-mirrors. Basically, displaying an image on the video projector is turning this surface as a transmissive gray-scale pattern (note that it is not actually transmitting light, just reflecting). You put it in the image plane (at the position of the sensor array) and you use a lens to focus all of the light coming out of the DMD surface onto the photo-diode.
    Now, instead of scanning, you just have to display a pattern consisting of a "black" frame (fully "blocking") except only one "white" pixel ("transparent") and integrate as usual. As you know which patterns was used for each integration and can, as previously, rebuild the image.

    Second approach, first improvement : instead of lighting pixel per pixel you can use specific patterns. The basic idea is to integrate photons coming from multiple pixels at the same time and reconstruct with a specific algorithm. The idea is to express the problem as a linear equation A x = y where x is the input image, A is the measurement operator = a matrix representing the system and y is the measured vector. In the previous case, you were measuring pixel per pixel which is equivalent as modelling A as the identity matrix (ones on the main diagonal, zeros everywhere else and so y = x). Imagine now that you use another matrix / another way to combine multiple pixels, such that each row of A is pattern you have to display on the DMD and the matrix row is still square and full-rank (a well defined system). In the end you can still reconstruct x from y with A' y = x (where A' is the inverse of A) and get back your image.
    Why would you do this? Well, instead of getting a bunch of photon from a tiny opening you will be measuring many more photons which is a good thing as our real-world detector is noisy. You will thus increase the signal to noise ratio.

    Second approach, third improvement : the main problem of the previous system is that, to obtain a 1 mega-pixel image, you still need to do 1 million projections/measurements which is a lot, and makes the whole process slow. But, you know for a fact that images are compressible signals (JPEG is a proof of that) which means that you can represent any 1 mega-pixel image signal into a much smaller vector size. This is because natural images are not random structures and possess some level of coherency = redundancy between pixels. So instead of making as many projection as they are pixels (a square matrix), you will do less, say by a factor between 4 and 10. The matrix A becomes rectangular and you have to use a more complex reconstruction algorithm (non linear, or based on a convex optimization system) which takes into account prior knowledge you would have of natural images (think of it as external constraints that will help you make the system sufficiently well behaved).

    This is basically how single-pixel cameras work (with compressive sensing)...

    I'll pass for the bonus point.

  21. Re:Outdoor Roomba + Kinect on Microsoft Rolls Out Robot Security Guards · · Score: 1

    When they are released on an intervention, they start flashing their Blue Screen of Death and Red Ring of Death...

  22. "A picture may be worth a thousand words..." on Google Announces Image Recognition Advance · · Score: 1

    Especially considering a 1 mega-pixels image in 8 bits gray-scale. That's 1 MB worth of information. Considering 8 letters in average per word (including the various punctuation characters) and 250 words per page in whatever-16-bits character encoding, the image weighs the same as a book of 200 pages.

  23. Re:Read the Paper, article is exagerating "Quantum on First Demonstration of Artificial Intelligence On a Quantum Computer · · Score: 1

    (I can't believe I didn't notice I misspelt Quantum in that subject field.)

    If you want to, we have this neat quantum computer which is capable of making the difference between 'n' and 'h'...It might be pricey but it is totally worth it...

  24. Re:Great "invention" on Microsoft Develops Analog Keyboard For Wearables, Solves Small Display Dilemma · · Score: 2

    His smart-watch didn't recognize the characters I presume...

  25. Re:Reader's Digest Version on Study Weighs In On the Reliability of Eyewitness Testimony · · Score: 1

    Do they mean that eyewitnesses should wear glasses?