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User: petermgreen

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Comments · 10,783

  1. Re:Dielectric constant & high speed circuits on Aquarium Full of Oil For PC Cooling · · Score: 1

    i seem to remember that electrolytics have EXTREMELY wide tollerance bands anyway (think sometimes as much as 50%). They aren't really of any use for anything precision anyway.

  2. Re:In case of slashdotting on Aquarium Full of Oil For PC Cooling · · Score: 4, Informative

    size weight and cost

    for any non-trivial power dissipation a heatsink with a fan is a far better bet on all of those criteria than a passive heatsink

    while some heat leaves a heatsink by radiation a lot goes by conduction into the surrounding air. Whilst that air will move away by convection to some extent this isn't exactly a fast process especially in confined spaces like a computer case.

    fans make the airflow both significantly faster and more predicatable.

    the only real problem with fan cooling in such applications is noise.

  3. Re:Some foresight required on Matrix 3D memory is World's Smallest · · Score: 1

    we buy our movies on dvds which have the movie manufactured into them and are not rewritable...

    if you are going to shell out the price of prerecorded media you are unlikely to want to record over it thus destroying most of your outlay (blank media is comparatively cheap in most cases by comparision)

  4. Re:My 1978 Mini gets over 55 mpg on Hybrid Drivers Provide Real-World Mileage Data · · Score: 1

    i dunno how things are in the us but i belive over here in the uk owning multiple cars pushes up your insurance costs significantly (one way round this might be to have an old banger as one of your vehircles and make use of the fact that the fully comprehensive cover on your main car is likely to include third party cover to drive other cars).

    also unless you are either single or very disciplined multiple cars are likely to mean more total mileage

    it also means you can't nip somewhere on your way home from work or whereever and pick up something big if you didn't think to take the big vheircle from the start.

  5. Re:Data accuracy on Hybrid Drivers Provide Real-World Mileage Data · · Score: 1

    it depends on exactly what they mean by measuring carbon

    if they mean measuing ELEMENTAL carbon then sure its going to be a bad measurement

    if they mean measuring TOTAL carbon whatever compounds it happens to be in then you have the simple principle that what goes in must come out and it should be pretty easy to measure the carbon in a gallon of fuel.

  6. Re:Data accuracy on Hybrid Drivers Provide Real-World Mileage Data · · Score: 1

    i seem to remember that US farming methods are very energy intensive offsetting the gain somewhat (possiblly even eliminating is altogether depending on who you ask)

    things may well be different in brazil though.

  7. Re:Diesel Requires More Barrels of Oil on Hybrid Drivers Provide Real-World Mileage Data · · Score: 1

    aren't deisel and gasolene made from different parts of the oil anyway?

    i'm sure you can adjust the mix to some extent by methods like cracking and reforming but you don't get X gallons of oil making Y gallons of petrol or Z gallons of deisel and nothing else.

  8. Re:seems sort of a waste on Hybrid Drivers Provide Real-World Mileage Data · · Score: 1

    should also make stations quiter (and in the case of covered stations cleaner)

    large deisel locomotives aren't exaclty quiet when they are belching out black smoke trying to accellerate hard out of a station

  9. Re:seems sort of a waste on Hybrid Drivers Provide Real-World Mileage Data · · Score: 1

    in the us do you have any system to stop people just registering thier car in a different state if they don't like the California rules?

  10. Re:MPG science on Hybrid Drivers Provide Real-World Mileage Data · · Score: 1

    right so it takes more POWER

    but it takes you less TIME to get to your desired top speed

    in a perfectly efficiant system reaching a fixed speed in a fixed mass of car would take a fixed amount of energy

    ofc the real world is not perfectly efficiant but reaching your desired speed as efficiantly as possible does not mean accelerating as slowly as possible and it almost certainly doesn't mean flooring it either the ideal is going to be somewhere in between and its finding that in between spot that matters

  11. Re:Nay on Perl Medic · · Score: 1

    isn't the whole idea of utf-8 that it can be used by code that wasn't explicitly designed for unicode?

  12. Re:Notation? on Factors Found in 200-Digit RSA Challenge · · Score: 3, Insightful

    ^ is kinda a dirty hack notation where you can't superscript

    my guess is that someone copypasted it and in doing so lost the superscript (it should be noted that slashdot don't allow superscripting at least in comments)

  13. Re:Been there, done that on The Horror Of British Telecom · · Score: 1

    iirc mmo2 demerged from bt and when they did so bt cellnet became o2

    i've no idea how much of thier stock still has common owners though.

  14. Re:fxs from voice modem? on SPA-3000 Review/Guide: Affordable Home PBX · · Score: 1

    well a dialtone is just a f*cking tone so that shouldn't be a problem.

    what you will need however is a pair of relays. The coil of one relay is used to deliver DC to the line (a relay coil makes a handy inductor ;)) and to sense when the phone is off the hook. The other relay

    you may have to seperately power the modem side (with dc blocking capacitors) to stop the modem keeping the sense relay on

    then you would need a second relay to put ring voltage into the phone.

    the hardware wouldn't be too difficult to make but getting the software right could be tricky

  15. mmm mods on crack again? on Nanomaterials Used in Possible Cancer Cure · · Score: 1

    this is offtopic sure but i don't see how its a troll

  16. Re:Interoperability is not desirable on Where Should all the 4th Gens Go? · · Score: 1

    afaict

    j++/java suitable for the old microsoft vm can afaict be turned into .net bytecode without even having the source.

    not sure about C++ i know visual C++ .net can compile ordinary C/C++ code but it crashes on reading an unitialised primitive (wtf)

    i've heared vb was changed almost beyond recognition though.

  17. Re:Talk about jumping version numbers on Live Picture of the Next Xbox · · Score: 1

    erm X is 10 V is 5

  18. Re:Some of us Alaskans need to eat on Internet Hunting Banned in California · · Score: 1

    out of interest

    do you do a day job as well as hunting?

    do you do bits on the side on top of hunting?

    do you sell some of the meat you get from hunting?

    just wondering how you pay for your internet connection etc

  19. Re:Not much of a problem... on Malicious Web Pages Can Install Dashboard Widgets · · Score: 1

    there are two types of unsafe

    unsafe because thier might be bugs in the code interpreting them (pretty much any format that doesn't map more or less directly to text or display data)

    and unsafe by design for example running native code under a users permissions (yes its techincally possible to sandbox native code but its extremely rare and requires good knowlage of exactly how the kernel will behave) or designing an app like dashboard that can be trivially taken over and rendered unusable (as demonstrated by the site)

  20. Re:One-Click Hunting on Internet Hunting Banned in California · · Score: 1

    fired from an internet cafe with a stolen credit card springs to mind.........

  21. Re:PETA approved on Internet Hunting Banned in California · · Score: 1

    there is also the people eating tasty animals guy (who apparently owned the peta.org domain before it was forcibly taken from his control)

  22. Re:then dont use it on Simple, Bare-Bones Motherboards? · · Score: 1

    usb-serial/paralell apaptors do indeed exist never tried them myself so i can't comment on how well they work

    theres quite a bit of kit (especially homebrew or speicalist kit) out there that uses the paralell port as general perpose io (you have 12 digital output pins and 5 digital input pins which you can use for pretty much whatever you want) i doubt this would get on very well with a usb-paralell adaptor

    on the mouse issue i seem to remember reading that ps/2 mice have a higher scan rate than the usb version though i'm not absoloutely sure

    also i've heared of chicken and egg type situation with usb input devices (ie it won't pick up the new device until you log in but you can't login without the keyboard or mouse)

    finally if your keyboards really last that little time then you are buying shitty keyboards. a good cherry keyboard will last a very very long time.

  23. Re:then dont use it on Simple, Bare-Bones Motherboards? · · Score: 1

    the idea of amr was it would allow the modem logic to be on the motherboard but the final line interface to be on a riser (the final line interface has to be approved for the coutnries it will be sold in and this can be expensive)

    but pci modems have become so cheap and work in all systems (economy of scale again) that its just not worth it to use the riser system

  24. Re:Just noticed on Google DNS Glitch Caused Outage · · Score: 1

    www.google.com/intl// gives you google in that language

    they use xx- for the ones that don't have standard language codes ;)

    xx-hacker is l33t sp34k
    xx-bork is bork bork bork (whatever thats supposed to be)
    xx-elmer is elmer fudd
    xx-klingon is klingon

    there may be others to that i haven't spotted ;)

  25. Re:Leaked known bug on New Mozilla Firefox 1.0.3 Exploit · · Score: 1

    right so then the REAL question is how long was the known bug restricted for an why wasn't it fixed earlier

    someone really needs to write a tool to make sure that bugs get copied somewhere public before the devs get a chance to restrict them.