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User: ebcdic

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Comments · 339

  1. Too much current on Charge Your Cellphone In 20 Seconds (Eventually) · · Score: 5, Informative

    My phone battery has a capacity of 2.1Ah. To charge it in 20 seconds would require a current of 380 Amps. What kind of charger could safely supply that?

  2. Re:Trivially constructive on Major Advance Towards a Proof of the Twin Prime Conjecture · · Score: 1

    it provides the contradiction by constructing a list of numbers at least one of which must be a new prime. It's simple to test each of them. If you want to construct an infinite list of primes, just repeat indefinitely.

  3. Re:Trivially constructive on Major Advance Towards a Proof of the Twin Prime Conjecture · · Score: 1

    I'm pointing out that the existing proof is constructive, not giving another proof.

  4. Trivially constructive on Major Advance Towards a Proof of the Twin Prime Conjecture · · Score: 1

    N!+1 either is prime or has prime factors not in 1...N. Try factorizing the integers N+1 ... N!+1 in turn until you come to one that is prime.

  5. Not just perspective on Btcd - a Bitcoind Alternative Written In Go! · · Score: 4, Insightful

    What have you bought over the last year? How has their price varied in dollars and in bitcoins? No currency's value is constant, but some are a lot more constant than others.

  6. Not funny enough on A New Benefit For Logged-In Readers: Meet Slashdot's ROT13 Initiative · · Score: 1

    See subject

  7. Reads like a press release on Tesla Motors To Pay Off Government Loan 5 Years Early · · Score: 5, Funny

    Oh wait, it *is* a press release.

  8. A program can't necessarily fail gracefully. An assertion failing means that something has already gone wrong; perhaps data structures are corrupted and continuing might result in worse damage: writing wrong data, deleting the wrong file. Returning to the caller is not necessarily safer than exiting.

  9. It's worse than that on Typing These 8 Characters Will Crash Almost Any App On Your Mountain Lion Mac · · Score: 1

    It turns out that some programs (e.g. Unison, a usenet reader) will crash if they try to display a document containing the string. Quite possibly more will turn up - they'll be programs that try to recognise URLs and display them as a link.

  10. However, in this case the only bug is in the assert() call itself. It didn't catch a mistake, it was one.

  11. Re:Simply put.. on How Do You Detect Cheating In Chess? Watch the Computer · · Score: 1

    > I thought it was more if you win playing the same moves that a computer would make you are cheating.

    As Regan points out, this is only unlikely if you play the same moves as a computer, and many of these are cases where the advantage of the chosen move was tiny. If the computer chooses moves that are forced or better by a clear margin, so will a good player. On the other hand, if the computer's preferred move is only better by an insignificant amount, it's very unlikely that a human will repeatedly do the same.

    Of course, this allows cheats to improve their strategy: where there are several moves with little difference between them, choose randomly instead of choosing the best.

  12. Just swap badges on Texas High School Student Loses Lawsuit Challenging RFID Tracking Requirement · · Score: 1

    I have to type something here to please the filter.

  13. I always thought... on John McAfee Explains How He Milked Information From Belize's Elite · · Score: 2

    ... that the people with the most interest in putting malware on computers were the very same people who sold you software to remove it. So I don't find this in the least surprising.

  14. Bribes on McAfee May Have Been Captured · · Score: 3, Insightful

    So he left the US because he didn't want to pay taxes, and now finds that instead he has to bribe politicians. Life is so hard for the rich.

  15. Ha Ha on Critic Cites Revenge of the Sith As "Generation's Greatest Work of Art · · Score: 5, Funny

    Slashdot trolled by feminist academic.

  16. One-time pad on After Weeks of Trying, UK Cryptographers Fail To Crack WWII Code · · Score: 2

    Having "some clues about detecting a successful decoding" doesn't help with a (correctly-used) one-time pad. Every message of the correct length can encode to the same cyphertext, for some one-time pad, so in the absence of the pad the cyphertext contains no information at all about the message except its length.

    Just to be quite clear about this: you say "[a] decoding that renders a perfectly structured sentence with proper spelling, and/or recognized jargon could be picked out by computer as a "highly probable content" from all the other gibberish decoding", but *every* perfectly structured sentence of the right length with those properties is a possible decoding.

  17. Re:The missing link between humans and republicans on Research Suggests Apes and Humans Separated By a Single Gene · · Score: 4, Insightful

    From the point of view of the world outside America, Democrats are the missing link between humans and Republicans.

  18. I thought this was impressive... on Chattanooga's Municipal Network Doubles Down On Fiber Speeds · · Score: 1

    ... until I realised that "30 MB/sec" should have been "30 Mb/sec". Bits, not bytes.

  19. When I'm bored... on Company Claims 80% of Facebook Ad Clicks Are From Bots · · Score: 5, Funny

    I google for "whiplash" or "loans" and click on all the ads.

  20. Re:Explain the mind of a genius? on 350-Year-Old Newton's Puzzle Solved By 16-Year-Old · · Score: 4, Insightful

    No. The problem is to determine the trajectory from the initial position and velocity. A human tracks the ball as it moves, which is a completely different problem.

  21. No, England on A 'Radical Manifesto' For Computer Teaching In English Schools · · Score: 4, Informative

    There are similar issues in the rest of the UK, but this particular story is *not* about the UK as a whole. Education policy is devolved to the Scottish, Welsh, and Northern Irish parliaments/assemblies. The manifesto is addressed to Michael Gove, who is the Secretary of State for Education in England.

  22. Too long on Software-Defined Radio For $11 · · Score: 5, Insightful

    I'm unfamiliar with software-defined radio, and I don't want to spent 20 minutes watching a video. I hate this trend of using a video for something that could be explained in text that I could read in a fraction of the time.

  23. Not "Blairite legislation" on UK Man Jailed For 'Offensive Tweets' · · Score: 1

    The law against incitement to racial hatred was passed by Margaret Thatcher's government in 1986.

  24. Er, no on In the EU, Water Doesn't (Officially) Prevent Dehydration · · Score: 1

    Most bottled water is sold by those same soft drink companies. For example, the Coca Cola company owns dozens of bottled water brands.

  25. absolute nonsense on No Tab Relocation Coming For Chrome · · Score: 1

    For 99.9% of users, the performance of Firefox is just fine. It doesn't crash, it runs fast. Only some tiny minority experience the problems you suggest, and they can bugger off and use Chrome and no-one will even notice. For the vast majority of users, UI changes are much more significant.