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User: Johan+Veenstra

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Comments · 248

  1. Re:New backup medium? on Movie Playback From 1TB Holographic Disc · · Score: 1

    10^12 / 1920 (pixels horizontally) / 1080 (pixels vertically) / 3 (bytes per pixel) / 25 (frames per second) / 60 (seconds per minute) = 107 minutes.

    So this new holographic disc can hold 1 hours and 47 minutes of uncompressed HDTV video. You would still need 6 discs for the entire trilogy...

  2. Re:Yeah, this would work... on Linux Desktop Guide · · Score: 2, Insightful

    > Going all the way back to Windows 3.1, even
    > my worst Windows installs always end up with
    > more things functioning than with the best
    > Linux installs.

    So the only program you use is Solitaire and Calculator, must be because there weren't any other programs installed.

    > I don't know what went wrong, but it absolutely
    > refuses to accept my disc 3's.

    So you skipped the 'check cd test' and got bitten by a badly burned disc 3....

    > Immediately upon loading Gnome, it tells me I have
    > some updates to download. 166 of them.

    And how is this any different to booting win2000. First you have to install IE6, then SP4 (129 mb) and then 42 other security related updates, having to reboot 7 times in the process. Oh and if you're not behind a hardware firewall 2 or 3 worms install themselves before you have updated to IE6.

    > Oh, you say Fedora Core 2 doesn't work with Nvidia
    > graphic cards by default, unless you change a few
    > settings and recompile the kernel?

    Hmm, strange I'm using FC 2 right now with a nVidia graphics card, without changing any settings, and without recompiling the kernel.

  3. Re:Largest free world non-nuke was 4.8 KTons ANFO on British Town Worried About WWII Ammo Ship Wreck · · Score: 1

    There are sections that are mined with a single mine (> 20 tons). Some years ago one of them was set off by lightning .....

  4. Re:RAMdisk solution on Ultra Fast Disk Drives With No Moving Parts · · Score: 1

    Using part of the memory as a RAM-disk is just plain silly. Let the OS deal with the disk caching, if it makes a big difference, there's something wrong with your disk caching.

  5. Re:Hmmm, must be using really small atoms on Taiwanese Firms To Launch a 2 Terabyte Memory Card · · Score: 1

    Multiply by 8, since each BIT requires several transisters. There are 16 trillion bits in 2 TB.

  6. Re:Some points that a lot of people miss on Artificial Prion Created · · Score: 1

    - Where are cows fed to cows?
    - Where are cows going mad?
    + Hmm same answer, coincidence?

    - Where are those mad cows being eaten?
    - Where are human getting sick?
    + Hmm same answer, coincidence?

    I know it's not absolute proof, but still something to think about.
    By the way, in case you're wondering, what if people ate other people, would the same happen? The answer is yes, it is known from the folklore of kanabalistic tribes, that if you eat too many brains, you go mad...

  7. Re:The TRUE source of Mad Cow Disease? on Artificial Prion Created · · Score: 4, Interesting

    The same thing was known in kanabalistic tribes, if you eat to many brains, you go crazy.

    Those prions are nothing special, they have always been there, but not in enough quantity to do any (as far as we know) harm. Those species at the end of the food chain receive some more prions through their diet, but still not in hazardess quantities.

    When we started feeding cows to cows(yes, money makes prople do strange things), we created a loop in the food chain, in effect stretching the food chain infinitly. The species in the loop (cows) and those at the end of the food chain developed a new disease because of the overdose of prions.

  8. Re:It became obsolete on SGI to Scale Linux Across 1024 CPUs · · Score: 4, Informative

    Actually RISC is a bad name for what it stand for, it should have been SISC (Simplified Instruction Set Computer), since the key difference between the two are the complexity of the instructions and not the quantity.

    A CISC instruction could do things like: take the value in register BP, add 4, get the value from the memory at the address you just computed, add the value in the register AX, and put the result back at the same memory location. Execution would take several clock-ticks.

    To do the same in RISC, you would need several instructions (add 4, get from memory, add ax, store to memory). The execution of the individual instructions would take one tick each, so the sequence would take several. But on average RISC was a bit faster.

    CISC was invented in a time that the memory was small, in the CISC way you could store larger programs in the same amount of memory.

    RISC was invented when memory-size was not limited anymore, and looked to displace CISC in the long run.

    CISC was still around when the memory bandwidth became a limiting factor. And since fewer instructions needed to be fetched from memory, more bandwidth was left for other data traffic. RISC lost some of it's speed advantage.

    Modern CISC processors, get CISC instructions from memory, chop them up in smaller instructions, and executes those smaller instructions really fast. So in fact they can be seen as RISC processors, posing as CISC processors, ie the best of both worlds.

    So CISC is a way of compressing RISC instructions, so they take up less memory/bandwidth.

  9. Re:Let's see.. so far... on Tour De France Showcases Multitude Of Tech · · Score: 1

    There is nothing high-tech about NASCAR, carburetted engines are a thing from the past.

  10. Re:Tyler Hamilton's Homepage on Tour De France Showcases Multitude Of Tech · · Score: 1

    This Friday, Saterday and next week wednesday will be the deciding stages. This friday and saterday stages end with a Category 1 climb (the kind of stages Lance always uses to attack). Not sure wether Lance is gonna 'need' the uphill TT next week.

  11. Re:Poisonous fuel on 'Satan' Missile Now Launches Satellites · · Score: 4, Insightful

    Na and Cl are both nasty chemicals, but I eat NaCl every day.

  12. Re:Human Error on Breeding Race Cars With Genetic Algorithms · · Score: 4, Interesting

    - 0.88 seconds is not well within the margin of error that the human drivers would introduce.

    - If you would put all 20 current f1 drivers in exactly the same car, 15 of them would qualify within 0.5 of a second.

    - 0.88 seconds advantage every 73 laps (Indianapolis) would accumulate to 64,24 seconds (almost a lap).

  13. Re:The RISC OS Evangaliser Returns on Why Users Blame Spatial Nautilus · · Score: 1

    In KDE you can do the exact same thing. Except left click opens in the same windows, and middle click opens in a new window. Browsing the internet works exactly the same way.

  14. Re:And only 3 to 5 years before I can buy one... on 40" OLED Television Revealed at SID · · Score: 2, Informative

    How many bits per color are stored on a DVD. Yep, only 6, so I guess it's good enough.

  15. Re:Here's a way to save time and disks on Fedora Core 2 released to Mirrors, Bittorrent · · Score: 1

    You don't even need another machine, just download the iso's, download a bootimage, write a diskette, boot, point to iso directory, install.

  16. Re:That's some impressive bandwidth there on Sony PC/DVR Incorporates 7 Tuners & 1TB HD · · Score: 1

    7 stream totaling les than 2 MB/s should be a problem, for a single drive.
    5 250 GB harddrives in a raid 5 array shouldn't have a problem with it either.

  17. Get the facts straight on Recharge Batteries in 30 Secs · · Score: 1

    You say it would take a thousend megawatts to charge a car in one minute.

    Well let's calculate:

    1 x 10^9 watt x 60 seconds = 6 x 10^10 Joule
    Your average car (at it's top efficiency) would need about 6000 liter of fuel to produce the same amount of (useable) energy.

    Something doesn't compute.

    So you're off by at least a factor 100 (if a car can hold that many batteries), now we're down to about 10 megawatts. Not beyond the realm of possibilities.

  18. Re:Good luck to the guy. on 500 EURO reward for finding car by finding laptop · · Score: 3, Funny

    Slashdot will probably post a dupe 365 days from now.

  19. Re:Hmm... on MP3...in Surround Sound · · Score: 2, Insightful

    Well, since there are only two audio channels on your cd's, reencoding your entire cd collection won't do much good.

  20. Re:well, duh... on Mine The Moon For Helium-3 · · Score: 1

    Airpressure above the balloon is higher than below the balloon.

    Think of a cube (1m x 1m x 1m) of some very light material submerged in water. The waterpressure from the sides (left vs right, from vs rear) cancel each other out. The waterpressure on top of the cube is lower than below the cube. The difference in pressure * the surface area = the force pushing it upwards.

  21. Re:coal on Mine The Moon For Helium-3 · · Score: 1

    He3 produces 20,000,000 times as much energy as coal. Redoing your calculations with those numbers, bringing back a pound of He3 could cost as much as 1,600,000 dollars to be economically viable!

  22. 20,000,000 on Mine The Moon For Helium-3 · · Score: 1

    You're absolutely correct, He3 yields about 20,000,000 times as much energy as coal. Oh well, only of by a factor of 20,000 :)

  23. Re:1000 (20,000,000) times the energy on Mine The Moon For Helium-3 · · Score: 1

    Fusing 1 kg of He3 yields 20,000,000 times the energy as burning 1 kg of coal.

  24. 20,000,000 times as much energie ! on Mine The Moon For Helium-3 · · Score: 1

    Atomic mass:
    H : 1.007825
    D : 2.014102
    He3 : 3.016029
    He4 : 4.002603

    Atomic mass loss per kilogram He3: ((D + He3) - (H + He4)) / He3 = (5.030131 - 5.010428) / 3.016029 = 0.0065327

    Energie per kilogram He3 : 0.0065327 * c^2 = 5.88 * 10^14 J (is about the 19 Megawatt years quoted in the article.

    Energie per kilogram coal is about 29 * 10^6 J.

    5.88 * 10^14 / 29 * 10^6 = 20 * 10^6

    So 1 kilogram of He3 produces about the same energie as 20,000,000 kilograms of coal.

    Oh well, being wrong by a factor of 20,000 is not too bad for slashdot.

  25. Re:We'd laugh at SCO if they tried it here. on Australian Firm Asks SCO To Detail Evidence · · Score: 1

    You may or may not be aware of this fact, but the best coffee is made with boiling (100 C) water. In most countries coffee is consumed HOT.

    I suggest you try this, travel to Europe, Italy for example (they make bloody good coffee over there), order a cup of coffee, spill it on your lap (by accident ofcourse) and sue the owner of the coffeeshop. I'll personally come over to Italy and laugh you out of court...