Slashdot Mirror


User: rcw-home

rcw-home's activity in the archive.

Stories
0
Comments
740
First seen
Last seen
Profile
(view on slashdot.org)

Comments · 740

  1. Re:Environmental aspect? on Superconducting Power Cable in Detroit · · Score: 1

    Yes. Stuff could still catch fire in the meantime though.

  2. Re:Environmental aspect? on Superconducting Power Cable in Detroit · · Score: 1
    Well, it's slightly more complicated than that. Once the nitrogen leaks out and the ceramic loses its superconductive properties, the megawatts (they said 14000 homes split over three cables) running through that cable will make it heat up faster than a light bulb filament, igniting the cable's insulation. It could possibly become hot enough to ignite aluminum and other light metals that may happen to be nearby.

    It's a safety issue, not an environmental issue. I hope they include an automatic temperature shutdown feature.

  3. Re:People aren't as dumb as Suck thinks... on Information Wants to Suck · · Score: 1
    DVDs come with something perilously close to a license agreement when you start them up - all those warnings about when, where, and how you're allowed to play the thing (home use, no public screenings, etc).

    That's not an agreement (the "I agree" checkbox thing has not yet been upheld or rejected as an "agreement" in any US court AFAIK, and this would be an order of magnitude more passive). What it is is legal advice.

    Don't let anyone except a lawyer (I am not one) you trust give you legal advice.

    With that disclamer, I'd like to clarify a couple things. There isn't some universal intellectual property law that keeps you from doing whatever you want with a DVD after you buy it. There is copyright law which restricts copying it (with certain "fair use" exceptions), and the courts have historically upheld a doctrine called "right of first sale" which lets you do certain things like resell a book/CD/DVD/etc you own but never licensed (as a result, noone bothers to license books to consumers). Fair use and Right of First Sale are priviledges you'd have to specifically sign away - a company can't sell something to you and then unilaterally revoke them with a cheezy non-skippable warning screen.

  4. Re:Ground Loop on Building an MP3/DVD Box for the Home Audio System? · · Score: 1
    This is usually fixable by powering anything that's interconnected via anything analog off the same power strip (for example, your computer, reciever/amp, dvd player, and vcr). If you'd like to avoid noisy things such as hard drives and fans near your audio gear, you can make yourself a passively-cooled PC that boots via a floppy and nfsroot.

    If you can't do this with your setup, get a ground loop isolator or audio suppressor at any home audio/electronics store (I think even Radio Shack carries them).

  5. Re:To protect against Print Screen, use DirectX on The Read-Once, Write-Never Web · · Score: 1
    Not if the plugin opens DirectX and puts the image in an overlay

    Try an unaccelerated video driver such as the standard VGA driver, or try just disabling accelerated video within the app if it allows for it. BTW, it's not that hard for a dedicated individual to write a video driver shim.

    or goes full-screen and traps all keys but Ctrl+Alt+Del.

    There's a lot of screenshot programs out there that have timer functionality.

    And go to jail for posting this information on Slashdot.

    Yes your honor, I'm guilty of being trolled.

  6. Re:Well, Duh. on Could We Have Had Cell Phones In The 60s? · · Score: 2
    *cough*bullshit*cough*

    A quick google search shows that waveguides were theorized in 1890 and proven in the 1930's.

    Delphion's patent search for waveguides returns stuff so old they don't even have it online.

    My November 1962 copy of CQ (which retailed for a buck) shows how to make a 10db transistorized preamp for 420 megacycles (it wasn't megahertz back then) in a .5" x 1.25" x 1" box, barely larger than the BNC connectors attached to it, with less than ten components. The article mentions that this particular design "shows significant improvement in signals up to 800 mc."

    The only thing that had to be digital about original cell phones was that you had to dial the number with your fingers. NTSC (do I need to tell you how long that's been around?) uses the same 25khz-wide FM signal as the original US cellular standard, AMPS. That's why people can modify old 60's television sets that tuned channels 82-84 (the same frequencies as AMPS cellular) to recieve transmissions from cellular towers.

  7. Re:wire the wheels on The Myriad Ways of Wiring Your Home? · · Score: 2

    Nothing wrong with windows (the glass see-through type). Even the most common faraday cages (microwave ovens) have windows. Just make sure the biggest hole in your cage is smaller than about 1/10th wavelength of the highest frequency you wish to block. To do this and have a nice view, place chicken wire inbetween the two panes of your double-paned windows. That, and make sure your cage is completely connected to itself on all corners. (no loose wires or cage sides) If you need to recieve any RF such as TV or FM, bring it through the cage using optical isolation. And if you can't generate your own power, put it through low-pass filters.

  8. Re:Home networking for Dummies? on The Myriad Ways of Wiring Your Home? · · Score: 1
    That's a really lame reason.

    A decent managed switch will let you dump traffic destined to/from one ethernet port to another monitoring port. For example, Cisco switches have a port-monitor command.

  9. Re:SMP never was all that on Emergence of SMT · · Score: 1
    The cost difference of the motherboards will be more than the second processor, and by the time they come out the chip prices will be completely different anyway.

    Then again, if you wanna suffer through first-gen SMP hardware bugs, your wallet will probably have similar masochistic tendencies.

  10. Re:SMP never was all that on Emergence of SMT · · Score: 1

    A cheap-ass socket a+thunderbird 1ghz combo is only 72+146=$218 (again quoting pricewatch), cheaper than your two chips alone.

  11. SMP never was all that on Emergence of SMT · · Score: 1
    a single Pentium III 1 GHz will handily outperform a dual-Pentium III 500 MHz

    Let's leave 98/Me out of the equation for now.

    Just how is a dual 500 p3 ever going to beat a 1Ghz p3? You still only have 1000000000 clock cycles per second. Your processor bus isn't any faster, in fact it's got an extra processor on it so there's increased contention, you have a little bit more L2 cache to play with, your memory bandwidth is the same, the overhead from SMP guarantees that you'll never efficiently use more than about 900000000 of those clock cycles in a second, and all your drivers have to play it SMP-safe, which is another 5-10% speed hit.

    x+x is not greater than x*2.

    SMP helps partition applications from each other so even if one app is hogging a cpu, other stuff will still give decent response times. But that's about it - unless you need to push the bleeding edge (and spend >5k on a box), SMP is not cost effective.

  12. Re:Clash of the Titans on Electric Car Bests Ferrari F550 In 0-60mph · · Score: 1
    Cumbustion engines are far more efficient than using energy that could create cumbustion (or steam), converting it to electricity, pumping that electricity down a line, and then to something that has to create motion again.

    Car engines are typically 30-35% efficient (which is why they need radiators and an exhaust subsystem). It's not hard for a large steam turbine to beat that, even if you lose 20% in the grid and another 20% of the remaining power in your car batteries.

    It's very easy to make electric motors that are >90% efficient.

  13. Re:A reminder that abcde works with FreeDB on CDDB No Longer Allows Grip Users to Connect UPDATED · · Score: 1

    Err, do the search and replace on cddb-tool, not abcde.

  14. A reminder that abcde works with FreeDB on CDDB No Longer Allows Grip Users to Connect UPDATED · · Score: 2
    This affects abcde too. Put this in your abcde.conf to get it to use FreeDB:

    CDDBURL=http://freedb.freedb.org/~cddb/cddb.cgi

    Oh, and if you simply have to use abcde with Gracenote's database, do this search and replace:
    s/$NAME+$VERSION/xmcd+fuckyougracenote/

    Abcde's default database will change to FreeDB in the next release.

  15. Re:Only One Answer on Does HDCP Herald The End Of Time-Shifting? · · Score: 1
    Then who are the guys in the riot gear

    That would be the FCC, not the FBI, as the original poster asked. Anyway, as part of the executive branch of the federal government, they don't make laws - they enforce laws created by Congress, not by JVC/Sony/Panasonic/etc's lawyers.

    Just in case it caused any confusion as to what I meant, my original response had a spurious "or" in it.

  16. Re:Only One Answer on Does HDCP Herald The End Of Time-Shifting? · · Score: 1
    Will the FBI bust into trailer parks across the US under...

    • FCC
      The FCC is not a lawmaking or institution, it is a commission.
    • DMCA
      You'd have to violate something in here first. Everything else is a civil offense.
    • UCITA
      The FBI doesn't investigate things under state jurisdiction.
    • CPRM laws?
      CPRM isn't a law...

    As usual, IANAL.

  17. Re:Parallel computing & computer science... on Fastest Commercial Supercomputer To Be Built · · Score: 1
    You can look ahead as far as you like in a fibonacci sequence by multiplying your current value by whatever power of Phi (approximately 1.618033988749894848204586834365638117720309179805 76, check this page for 2000 digits worth) you like, then rounding to the nearest integer that would match the sequence's odd-odd-even pattern. For example in the 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 sequence, to look ahead 5 places from the 987, do 987*(Phi^5). That comes out to 28656.994, not that far off from the correct answer 28657. The answers' accuracy reflects the number you're starting with (larger integers = more accuracy).

    Distributing this across a dozen or so processes wouldn't be that hard.

  18. Re:Downtime? on An RPM Port Of APT · · Score: 1

    The current hearsay is that Exodus made a typo in a router config.

  19. close on Netscape 6 Vs. 4.7x · · Score: 2
    Actually, the client (or proxy) sends an If-Modified-Since: header in the http request with the datestamp of the object in the cache. The server compares the datestamps and returns an HTTP 304 response if the client (or proxy) already has a current copy of the object, otherwise it proceeds with a normal HTTP 200 response.

    With HTTP 1.1 this whole process goes pretty quickly since it doesn't need to create a new TCP connection for each object.

  20. Re:Zero Emission? on Air-Powered Cars · · Score: 1
    ...necessary for a day of driving is one nice small bomb.

    This will never change. After all, two gallons of gasoline makes an even more impressive fuel-air explosive (FAE) bomb.

    Energy is energy.

  21. Re:what would you do? on NASA Tests Flying Scooter For Commercial Take-Off · · Score: 1
    Only if you can rotate the blades to a negative pitch. Otherwise, they will start windmilling backwards (which may or may not help you). With such a small disc size you'd still hit the ground pretty hard.

    I would imagine they would include such a capability. Any engine redundancy would be pointless unless one engine could turn both fans (V-22 Osprey can do this).

  22. Re:They help on Motorola's Getting To Know You · · Score: 1
    A tyrannistic government with B2 bombers, Apache helicopters

    Now now, you know you can't hold territory with air forces.

    I think you are kidding yourselfs when it comes to the martial prowess of even millions of civilians in the face of coordinated oppression.

    Vietnam taught us that it's impossible to win a war the citizens of the country don't want you to win.

    The major problem with a revolution such as that is that the replacement government has a good chance of being more corrupt than the previous one.

  23. Re:more performance on A Triplet Of AMD Goodies · · Score: 1
    Just a minor correction, Ultra160 and ATA100 are indeed 160Mbytes/sec and 100Mbytes/sec.

    My circa-1997 ultra-wide controller gets more than 160Mbits/sec from of my circa-1998 ultra-wide drive.

  24. Re:Why do peopel feel the need to store Credit Car on Western Union Cracked, Credit Cards Stolen · · Score: 1
    If they get the contents of that table, MD5 won't save you. No one-way hash will.

    MD5's relatively generous 128 bits only helps if the text being hashed has 128 bits (or more) of randomness in it.

    A 16-digit credit card number is 54 bits, the last twelve digits of it minus the check digit are 37 bits. I'd guess that real credit card numbers have less than 25 bits of randomness.

    It'd be a magnitude easier to bruteforce than a DES-hashed passwd file.

  25. Re:carnot efficiency? on Are Nitrogen Powered Cars The Future? · · Score: 1

    The best short-term compromise for this problem is to make an electric car that is charged via a gasoline engine. The advantages to this is there is no clutch, transmission, or drivetrain, and the engine is either on or off so it's always operating at peak efficiency.