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User: maxwell+demon

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  1. Re:Is it regular speed? on Ion-Propulsion Craft Reaches The Moon · · Score: 1
    Delta-v on the other hand bears NO relation to it's meaning whatsoever.

    That's wrong. Every physicist when seeing or hearing Delta-v will immediatly know that it is a velocity difference, even if he never was exposed to rocket science at all. That's because the greek letter Delta is commonly and quite universally used to denote differences (for example, the energy difference between two quantum states will usually be names Delta-E), and the letter v is also quite universally used to denote velocity (as in, v=dx/dt, a=dv/dt, p=mv, E_kin = mv^2/2, ...).
  2. Re:Extinction events on Ion-Propulsion Craft Reaches The Moon · · Score: 1

    That's why you should always take a bomb with you to the airplane: The probability that there are two bombs in the same airplane is very low.

  3. Re:intro to encryption on Intro to Encryption · · Score: 1

    Actually you should use tr a-zA-Z n-zN-Za-mA-M

    First, don't forget that there are uppercase letters as well (even if you personally don't use them), and second, you don't want to lose those m letters, do you?

  4. Re:intro to encryption on Intro to Encryption · · Score: 1

    I actually prefer the following method: For the first 49 primes, do an rot-p encryption. As key, use the order of these encryptions. Given that there are 49! different keys (that's about 6*10^62), it's a rather secure encryption method.

  5. Re:SETI noise on Intro to Encryption · · Score: 1
    Unbreakable.

    And the Titanic was unsinkable.

    Indeed, this code can be easily broken by just getting one of the CDs and making a copy of it. Yes, this needs physical access to the CD, and is therefore harder (and you can add extra levels of security, like putting that CD in a safe [and hoping that your friend keeps his copy secure as well]). So it's still a very secure code. But unbreakable, no.
  6. Re:Garbage on Intro to Encryption · · Score: 1

    No, it just looks like garbage, in reality it's an encrypted message.

  7. Re:But does you Linux run MS Office? on The Microsoft/SCO Connection · · Score: 2, Informative

    Ever heared of CrossOver?

  8. Re:Usability? How about accessibility? on Are Usability & Security Opposites in Computing? · · Score: 2, Informative
    Perhaps many passwords presents a different problem, but one of the supposed ideals behind biometric data is that it can be greatly complex and yet still readily available. But does that mean it's less secure?


    Definitively: yes.

    Don't base your security on something you cannot change easily.

    If your password is compromised, it's a no-brainer to change it. Your biometric data may be harder to compromise, but if it is, how do you change it? Surgery?
  9. Re:Tinfoil Hat Time on Intel's BTX Form Factor Launched Today · · Score: 2, Informative

    It's not about doing Intel's homework, but about a design which explicitly allows to design mainboards for Intel processors (after all, the noted BTX problem isn't that Intel didn't design an AMD mainboard for BTX, but that the spec make it close to impossible to design one). And the point of this is that case manufacturers will more likely want to build cases which work for both, than cases which only work for one of them. Which IMHO would give a form factor which at least allows this a competitive advantage.

    Basically the form factor is the interface between case and motherboard. Especially it doesn't completely fix the motherboard layout. It does, however, fix the positioning of those components which interact with the surrounding, like PCI slots, and with BTX now also the CPU (due to cooling). It should certainly not restrict motherboard design choices any more than necessary.

  10. Re:Tinfoil Hat Time on Intel's BTX Form Factor Launched Today · · Score: 4, Interesting

    Maybe AMD should create a competing form factor, which has some improvements over BTX (someone already mentioned the connectors), and works for both AMD and Intel (and is explicitly marketed as such)?

  11. Virus Patent Business! on Can Reverse Engineering Help In Stopping Worms? · · Score: 1
    Sure they are. See, a "virus" is a program, and the source code is copyrightable, and patentable as well.

    Maybe I should try to find new ways for viruses to spread, hide themselves, etc., but not write a virus, but patent them. I'm sure a virus writer will not check any patents, and then if some new virus is spread and the one who has written it is caught, I'll sue him for royalties.

    Thinking about it: Given that it's obviously possible to sue someone for just running patent-protected software (think GIF!), maybe I could even sue everyone infected with the virus, at least if the virus needs user interaction (like, clicking on some attachment) to spread?

    Hmmm ... I think I should patent this as business method! :-)
  12. Re:This is about programs, not biology. on Can Reverse Engineering Help In Stopping Worms? · · Score: 1

    Please show me a biological population free of virus deceases doe to being too small.

    However, maybe the fact that chosing Linux needs an active decision, and therefore a minimal intelligence, helps a bit here: The script kiddies won't target Linux, since they don't have a clue about it.

  13. Re:And you thought the trojans and spyware were ba on Row Brews Over P2P Advertising · · Score: 3, Interesting
    Well, it will really get interesting when you get advertising built into your operating system.

    Your printer is out of paper. A dialog pops up:
    Printer out of paper. New paper to insanely low prices at xxxxxxxxx. Click Ok to visit our web page.


    You open the system control folder. Before showing your files, it tells you:
    Having trouble with your computer? Check out out fine computer books at xxxxxxxxxxx. Click here to visit our web page.


    You start writing a letter. A window opens:
    Writing a business letter? Buy xxxxxxxxx's Business Letter Assistant, and be more productive and more successful! Click here!

  14. Re:How the mighty have fallen! on Intel Quietly Introduces 3.8GHz P4 · · Score: 1
    I am still shocked to find AMD's chips being consistently priced less than Intels (I have no idea how they do it).

    And later:
    I've seen very few AMD commercials over the years, but I can't get those dancing Pentium 4 "Blue Men" out of my head.

    Maybe there's a relation?
  15. Re:I thought... on Museum of the Future · · Score: 1

    Well, given that the length of the meter is also just an historic "accident" (basically, it's 1/40000 of the earth diameter), and given that it's today defined by the speed of light (which therefore has by definition the exact value 299792458 m/s), why not revise that definition, too? Say, we use your recommendation (1 new time unit = 1 gigaoszillation of the cesium frequency), then if we define the speed of light to 1,000,000,000 new length unit/new time unit, our new length unit will be about 3.3 centimeters.

  16. Re:Degrees in a circle? on Museum of the Future · · Score: 1

    Well, with current definitions, a century is approximately pi gigaseconds.

  17. Re:Wonder how much on How Computers Work... in 1971 · · Score: 1

    I guess it used paging (similar to expanded memory for the 8086/8088). I can't really see another way, since 64K is all the Z80A could address, and the ROM already took some of that space, too. It also must have come with it's own ROM to enable transparent page switching. AFAIK the ZX81 ROM had just 8K and was "mirrored" in the 8K to 16K range, so there was plenty of room for ROM improvements. I know that the ZX Spectrum ROM could be disabled from the expansion slot (this was used e.g. by the "shadow ROM" of the Interface I), I guess the same was true for the ZX81.

    The software hires then isn't too surprising, since ZX81 graphics was CPU driven anyway (thus the FAST mode with video output switched off except when waiting for input; but it was a good idea to switch to SLOW mode for input anyway, to avoid flickering for each single keypress), and 64KB left more than enough room for 256x192 (which for black/white eats up exactly 6K).

    However I don't know what $d011 effects are.

  18. Re:Wonder how much on How Computers Work... in 1971 · · Score: 1

    Bah, that's nothing against an old ZX81 with a whole 1 KB (yes, that's 1024 Bytes) of RAM (you could upgrade to 16 KB by adding a memory pack to the extension slot).

  19. Re:General principles don't change on How Computers Work... in 1971 · · Score: 3, Funny
    He told me that his students call him 'the old fart' and accuse him of being antiquated. I told him that the solution was to prefix anything he said with the word 'embedded'.

    And in his next lecture, he teached the following:

    Now, we type this onto embedded punch cards and put it into the embedded mainframe. The embedded program will then run, and finally the embedded printer will print the embedded result.
  20. Re:English Expertise in Short Supply on Open Source Expertise in Short Supply · · Score: 1
    I see, so there were really only three words correct. Here's the corrected text:

    Inphormation weak hass ann articel onn dhe sortage off eggspertise four enterprice ohpen sorce proyects end it's rahmifications four bosh enterprices end salairies four dhose posessed off thise skill. Wile id ees suspicios inn it's timeing end refferences too Ballmers resent eemail id dos poind owt somme deffinite conseederations thad companys planing ohpen sorce proyects bedder acount four. Thoose locking four markedable jop skils mighd allso taik node.

  21. Re:More pages v.s more relevant pages on Google Index Doubles · · Score: 1

    The stuff you find in /usr/lib :-)

  22. Re:Ok on Novell Pulls Out Their Ace Against SCO · · Score: 1

    What numbers lie between a search machine and 1,1 search machines? What is 1/10 of a search machine, after all?

    Maybe you've got more luck looking for primes between googol and 1.1*googol :-)

  23. Re:my thoughts on Will Wind Power Change Earth's Climate? · · Score: 1

    The problem is not just using those things, but wasting. Transport is a good example. Many modern cars are much more inefficient than they'd have to be. But as long as gas is cheap, few people care.

    Or the TV: You can save a lot of energy by switching the TV off instead of just standby when you don't use it. Also, most of them use more energy in standby mode than needed.

    Similar things are also true for your computer: When you don't need it, you can just switch it off.

    The point is, there are many ways to save energy without going back to pre-1800 life.

  24. Re:Why is there an assumption... on Will Wind Power Change Earth's Climate? · · Score: 1

    Yes, life will survive, as it has survived many catastrophies in the past (e.g. the one which extinguished the dinosaurs). The question is: Will we still have a world where humans can survive (let alone, enjoy being alive)?

  25. Re:Newton's laws can't be repealed on Will Wind Power Change Earth's Climate? · · Score: 1

    No, E=mc^2 says that mass and energy are equivalent, that is, mass is a form of energy. So if you transform some other form of energy into mass or vice versa, you don't do something fundamentally different that if you transfer e.g. electric energy into mechanical energy.

    Energy conservation is exactly fulfilled in special relativity.