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Journal Journal: Understanding in technology 1

There's an awful lot out there in the way of projects. Perhaps hundreds of filesystems, easily dozens of transport protocols (there's sonething like 9 or 10 for the IP protocol alone), there's maybe ten different packet dropping schemes and five or six packet queueing schemes. There's maybe ten of so wireless routing protocols. Linux alone has seen a vast range of schedulers and memory management systems, and three different threading models.

Comment Pointless. (Score 1) 104

Nobody ever won a race by doing the same as the guy in front. If you want to win races, you have to do something the guy in front isn't doing. And, ideally, you chase after goals your opponents haven't yet seen.

Linux is the stuff of innovation and invention, but in terms of desktop-ness, it's going backwards. There is also no serious likelihood of innovative GUI work on Linux, the IBMers and Microsofters are working far too hard at dragging Linux into the 1980s.

Forget the desktop. Create new niches and new markets, and get Linux into those first.

Comment Note to Slashdot admins (Score 4, Interesting) 44

I'd posted a related story describing a second jet from the same airline that failed in the same way on the same day. Please could you add the link to that as an addendum to this, as it seems a very important part of events. You can then junk my submission as we don't really need two discussions about this.

Comment Two incidents same day (Score 5, Informative) 44

Same airline had a second Boeing 737-800 report a hydraulic failure the same day, which is why they're inspecting all planes of this type in South Korea. But it surprises me that no other country or airline is conducting any kind of safety check, even on a small sample of aircraft.

The sequence of events seems to be roughly this:

1. Hydraulic power was lost.
2. One aircraft made a successful emergency landing. The jet that crashed failed on first attempt.
3. On second attempt, all power was lost, resulting in no capacity to deploy flaps. Thus suggests the power loss is a result of slow damage caused by hydraulic loss, but we won't be sure until investigation is done.
4. Plane landed third of the way down runway and skidded into concrete radio beacon and mound.
5. Black boxes severely damaged by crash and explosion.

The black boxes are in an unknown state, as they're going to be electronic and there was no power. We have no guarantee that they will reveal anything after that power loss, even if the data survived.

My guess is that the investigators will find more on the plane that survived. There's not much info on it, but if the power lines were damaged when the hydraulic system failed, that might tell us a lot more than the exploded plane can.

But because it didn't explode or crash, I'm not sure if it'll be part of the investigation or merely repaired. I'm firmly convinced that the decision on this aircraft will prove critical.

The concreted radio beacon is considered safe, as that's the wrong way to land on that runway, but I'm unclear from the reports what, precisely, it is an aid for. If you just want a radio beacon, place the circuit below ground in a concrete box and have just the aerial on the surface. Colliding with an aerial is less likely to be dangerous and underground circuits will be easier to reach and subjected to fewer climate stresses.

I don't think they could have easily stopped the plane, but I'm unaware of any effort to dump fuel or otherwise lessen the risk of fire. If such measures were taken, they're not being reported.

The failure of two different systems also tells me that there's no redundancy and that both systems occupy the same space in at least one point, possibly along the same ducts. There's just about no other way the failure of one could cause the failure of the other.

The pilots did not follow the recommended remedial procedures for electrical failure, according to aviation reports, which might suggest they knew the system was fubar, but they might also have been too busy.

We will know more later, obviously, but I would be very cautious of Boeing 737-800s if they're not being inspected anywhere else. Until we know what the fault actually is, assuming it is local to one carrier in one country, where said country is good on aircraft safety checks, is probably risky.

Submission + - Two Boeing 737-800s suffer hydraulic failure (alarabiya.net) 1

jd writes: Two South Korean 737s suffered near-identical hydraulic failure, with at least one also suffering a near-total loss of electrical power as well. The first jet attempted a belly landing, ending up smashing into a concrete post and exploding. All 737s in South Korea are now grounded for an emergency investigation.

But this raises several important questions. Firstly, why are no other 737s being checked? Until the crash investigation is complete, assuming it's a problem affecting one country only seems perplexing, especially given Boeing's current profile.

Secondly, why would a plane suffer multiple failures? If systems are isolated and independent, that sounds perplexing. Either they're not independent, or the reporting is problematic.

From the linked article:

The Boeing 737-800 involved in the latest incident was the same model as the Jeju Air plane that crashed on Sunday killing 179 people after coming down without its landing gear engaged.

Seoul said on Monday it would conduct a special inspection of all 101 Boeing 737-800 planes in operation in the country, with US investigators, possibly including from plane manufacturer Boeing, joining the probe into the crash.

The BBC adds the following information:

Indication of electrical fault in 'perplexing crash', aviation expert suggests
published at 12:39
12:39
"This is one of the most perplexing crashes I have ever seen. Nothing about it makes any sense," aviation expert Geoffrey Thomas tells the BBC.

Speaking from Perth, he notes that while a bird strike may have played a role, once the pilot issued a mayday call the air traffic control data cut out.

The sudden loss of data — which allows the flights to be tracked — "indicates an electrical fault of some kind", Thomas suggests.

Following the call, the plane was also allowed to land in the opposite direction to usual.

But the wheels were up, the flaps not set correctly and it landed halfway down the runway before careering into the localiser and exploding, he says.

Thomas says there are workarounds if an electrical or hydraulic problem arises, but these were not used.

"It just doesn’t make any sense. We're going to have to wait for voice recorder details before we can get a handle on what on earth went on."

Comment Re:Profit (Score 0, Troll) 369

There's nothing illegal about "illegal immigrants". Under treaties signed by the US and put into law, anyone may enter the country undocumented and through unofficial means if they have reasonable concern for safety.

That is the law. What is illegal is the deportation.

If you don't like the law, then change the law. But as long as it stands, the law should be respected.

Comment To be expected. (Score 1, Flamebait) 40

The US ranks as one of the most corrupt of all of the advanced nations, with an obvious desire to increase that level of corruption.

So, to be blunt, it doesn't shock me.

What does shock me is that there are more actual "mysterious deaths" of whistleblowers in the US with no obvious reaction by the public than you get in either US or Korean mafia-based drama.

This is deeply disturbing. If fiction writers are unable to keep up with current affairs, we've a problem. But if Joe and Jane Public consider said problem perfectly acceptable, we've a terrifying nightmare.

Comment Let me get this right. (Score 2) 176

The US government ends up compensating the bank for the loans that aren't paid off, which is essentially all of them. The bank ends up collecting from the US government pretty much what the US government would gave paid originally if they'd given a grant, if not more, due to the high interest rates. The bank, meanwhile, has already collected a fair bit from the former students.

And this makes more economic sense than just giving everyone a grant in the first place?

Well, it does to the bank, who is now wildly wealthy having had to do nothing.

It also does to the university, who can now charge excessive uncompetitive fees because gouging a market in coordination with a loan shark is trivial.

But to the student? To the taxpayers? To the government, who gave to keep track of all this because there's restrictions on hiring people not paying loans?

The system, by its very nature, suffers from a reversal of the usual market rules - the price isn't capped by what the market can bear, and we can see that by the fact that loans aren't paid off. Rather, prices are unbounded because high price means high prestige. The market will bear anything to get that prestige.

Comment OK, I can see a solution. (Score 1) 67

Agree that banks can withdraw from stress-testing on agreement that they and their deposits are no longer insured, that they contractually agree to no bailouts or support in any future crisis, and that they agree that both the bank and all employees voluntarily waive any and all relief on taxes.

In other words, you're exempt from rules in exchange for being exempt from what those rules ultimately back. Both sides of the coin or neither, you never get to have just one.

Submission + - New quantum relativity work (perfdrive.com) 1

jd writes: A new attempt yo produce quantum relativity is in the works. This time, the physicists have taken the line that if you allow for faster-than-light particles, you can solve a lot of the difficulties of merging the two theories. But it comes with a consequence.

You end up with three time dimensions and one spacial dimension.

The argument is that special cases constitute the real difficulty in merging the two ideas, so the physicists looked for a way to generalise outside the normal bounds, and to have relativity (despite its classical nature) produce the randomness in quantum mechanics.

From the article:

Quantum mechanics is an incredibly successful theory and yet the statistical nature of its predictions is hard to accept and has been the subject of numerous debates. The notion of inherent randomness, something that happens without any cause, goes against our rational understanding of reality. To add to the puzzle, randomness that appears in non-relativistic quantum theory tacitly respects relativity, for example, it makes instantaneous signaling impossible. Here, we argue that this is because the special theory of relativity can itself account for such a random behavior. We show that the full mathematical structure of the Lorentz transformation, the one which includes the superluminal part, implies the emergence of non-deterministic dynamics, together with complex probability amplitudes and multiple trajectories. This indicates that the connections between the two seemingly different theories are deeper and more subtle than previously thought.

Comment Not a useful question atm (Score 2) 21

There seem to be three standard rules.

1. Anything that is not demonstrably impossible is technically possible.

2. Within the set of what is technically possible, we need only look at the subset of simplest explanations.

3. Within the subset of simplest explanations, we need only consider those for which the level of evidence equals or exceeds the improbability of correctness.

A brain microbiome is technically possible, but it is not in the subset of simplest explanations, nor is the level of evidence sufficient. As such, It fails both the second and third tests.

To me, this does not mean we reject it outright, it means we simply don't consider it at all for right now. We neither accept nor reject, we simply put it to one side and see what scientists find in future. It's not a model we can usefully explore or make predictions with that would permit falsification.

Scientists are finding all kinds of new communications channels and behaviours within the brain. Clearly, our knowledge is nowhere near adequate to determine what is required. Let's get that sorted first, and then decide if there is anything left that needs a microbiome explanation.

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