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Comment Re:It's a big world (Score 1) 349

Spoken like a witness from Microsoft arguing for more H1-B visas. Slashdot is dominated by software types, and if the world is run by bad software, I don't know why you would look for a hard-hitting and insightful discussion of the subject on slashdot.

The old-timers, the ones who weren't born into a world of smug software fantasy, know that good and reliable software is not only hard, it is expensive, and that "See, it works" must be scrutinized very closely and sometimes at great cost.

The whole situation is a perfect storm: the cost of doing it right is high, the moment of truth is often delayed in time, and blame for the mess too hard to pin down to prevent recurrences by prominently displaying a few severed heads near the Tower of London.

Comment Faux Supercomputers (Score 1) 40

"One of the project heads said that graphics cards could be cut out for the job because of their high I/O and core count, adding that a conventional CPU-based supercomputer doesn't have the necessary I/O bandwidth to do the work." And maybe one of these days even the national labs will realize that billions and billions of CPU's that can barely talk to one another do not a supercomputer make.

Comment Re:There is value in "shallow" learning (Score 1) 166

If you have the requisite math to understand the cited Wikipedia article, the presentation is clear and concise. If you don't have the requisite math, I have no idea what could be done for you. This all reminds me of a fellow TA in a different department complaining that his undergraduates students at the well-regarded State U wanted math to be like Sesame Street. I doubt very much if the nations that are consistently outperforming the US on math and science exams are pandering to such a desire from students. If you wind up reporting to a high-level bureaucrat or manager who doesn't understand the subject matter he or she is overseeing, you can thank "broad strokes" education, I'm sure.

Comment Re:Fuck 'em. (Score 1) 445

Whatever happened to Peter Lynch's advice that you should invest in businesses you understand, and where are all the people at Slashdot who supposedly understand the computer business? Everything is going mobile, and that's changing everything. Processor design. Screen size. Advertising strategies. Even bets on the prospects for Intel and ARM. You didn't need a call from a stock analyst to tell you that mobile was potentially a game-changer for Facebook. Okay, so I pay attention to processors, but even I knew that only obstinate blindness would have kept you from seeing that Facebook and its investment bankers wanted to rush the IPO in before the mobile problem was spelled out in foot-high letters. You bought in not knowing that and hoping for a predictable IPO pop? That's exactly what the investment bankers were counting on.

Comment Re:Why all this speculation? The report was clear. (Score 2, Informative) 319

I don't know where in this scrambled thread to reply. Stall is a function of angle of attack, not of airspeed. People talk of a stall speed because, below that speed, the wings cannot generate enough lift to keep the airplane from literally falling out of the sky. When the airplane is falling out of the sky, you will have a very high angle of attack, and the airplane *will* be stalled, but it's because of the effective angle of attack, not because of the airspeed. Even above the misleadingly-labeled stall speed, increasing the angle of attack beyond the critical angle will stall an airfoil. Pulling back on the yoke--pulling the nose up--increases the angle of attack and is exactly the opposite of what needs to be done to recover from a stall. Pushing the nose down should eventually get the angle of attack under the critical angle, at which point the airfoil would no longer be stalled. Absent control inputs, an airplane is designed to be stable in pitch, which means that just letting go of the stick should work, at least in theory.

Comment Re:Um, me (Score 1) 86

No kidding - Seymour may be rolling in his grave over having his name attached to anything massively parallel. His entire design philosophy was to have just a few uber processors cranked up as fast as possible, although I wonder if by now he'd have changed his mind. Multiple processor servers were expensive when he passed away and the multiple core race we have going on now wasn't even fantasy.

The number of processors isn't the issue. The degree of connectivity is the issue, and IBM, Cray, and Seymour would all get it, even if the current "Cray" and UIUC aren't going to admit it. This version of Blue Waters is just another in a long line of massively parallel jokes. The version of Blue Waters proposed and abandoned by IBM would have been worth talking about.

Flops are nearly free. Connectivity is expensive. That's why flops, irrelevant though they may be, are advertised.

Comment Re:my model proves it !!! (Score 1) 347

There's this bizarre belief being stated by some of the skeptics on this particular article that somehow knowing the end of a process, but not the beginning, is in some way superior to knowing the beginning, but not the end.

The belief is far from bizarre. It is rooted in this poorly-understood phenomenon called entropy. Being able to posit an orderly beginning that is consistent with the observable and relatively chaotic present is far more meaningful than extrapolating into an unobservable future using equations with iffy and actually unknown stability properties.

Comment Re:They took mine. (Score -1, Troll) 294

Ha. Ha. Ha.

Do you *seriously* think this is about the Taliban and showing a bit of ankle?

The "shouting fire in a crowded theater" exception to the FIRST amendment to the U.S. Constitution is a legal hole big enough to drive whatever you want through it, whether it's the local vice squad, or some agency of government, or the entire U.S. military, if it comes down to it.

The Taliban are not different in any way that matters. They want to control people, and to control people, they want to control the flow of information. Obscenity is, always has been, and always will be just an excuse. It's amazing the way the same trick works over and over and over again.

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