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User: malen

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  1. Stay after the credits! on Review: Matrix: Reloaded · · Score: 2, Informative

    Just saw it, and loved it.

    Reloaded definitely has a different purpose from the original (we're not realizing for the first time that our world is a simulation), but quality-wise it was just as good. Zion looks a lot larger and more organized than I would have guessed, and we get to see some bad-ass robocop-style exoskeletons that will probably feature in Matrix Revolutions.

    The Wachowski bros. could easily have made a crappy movie, but they pulled this sequel off well.

    Be sure to stay past the end of the credits for an awesome preview for Revolutions!!!

  2. Description of size is slightly unclear... on There's a Hole in the Middle of It All · · Score: 1

    When they talk about the 2 or 3 million solar masses sitting within a radius of three solar systems, they mean only that all of that mass must be somewhere within that radius.

    They don't mean that the event horizon is that large, because the star orbiting this black hole couldn't possibly orbit right next to the event horizon.

  3. Re:Good idea for nuclear waste? on Going Up? · · Score: 1

    It's definitely possible to lower one's orbit with a solar sail: angle the sail opposite its orbital velocity, and there will be a thrust component outward radially, and another component against the orbital velocity. The retrograde component will overwhelm the radial component, and the orbital velocity will decrease, resulting in a lower orbit.

  4. I've no need for those damned atomic clocks! on Do You Have The Time? · · Score: 1

    "So how do you get the time?" Well, from my watch, which is calibrated to the sun dial out front.

  5. Active Noise Reduction on Making Your Room Quiet · · Score: 1

    A couple years ago I did some research on active noise reduction (using destructive interference to cancel out noise). My aim was to build a prototype noise reduction system for air ducts.

    I found that I could get upwards of 85% attenuation simply from signal inversion (as opposed to realtime fast Fourier transform computations), mostly around 300 Hz or so.

    However, this technology definitely does not work well for much higher frequencies, since as frequency increases the wavelength decreases, making it more difficult to keep the inverted waveform in phase with the noise. Also, there are many difficulties with feedback, since the sampling microphone mustn't inadvertently amplify the cancelling signal.

    In my research, the duct I was experimenting on approximated a purely 1-dimensional waveguide system; in a 3-dimensional space (a NOC filled with deafeningly l33t boxen, for instance), the acoustic characteristics of the environment are generally much too complex to compute for noise reduction for more than a very small region. That's why this technology is most applicable in headphones, car cabins, etc, since their acoustic characteristics are well documented and relatively static.

    The point of all my rambling here is to show that this technology is by no means easy to implement! It still has a way to go before it becomes a truly mature technology, in my opinion.

  6. Where can the story go after T2? on Terminator 3: Attack of the Terminatrix · · Score: 1

    What sort of robotic enhancements can be expected in T3, now that the liquid-morphic villain has been played out already in T2?

  7. Full time sysadmins... on Linux Win In Schools · · Score: 1

    Though remote administration indeed works for when the system is for the most part operational, wouldn't these schools probably need a full-time on-site sysadmin?

  8. How variable is the clock for this chip? on New Power-Sipping Chips From Intel · · Score: 1

    I wonder whether these new Intel's chips follow the examples of its current notebook CPUs with only two possible clock speeds, whereas Transmeta's chips have a somewhat more analogue clock variation scheme.