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Linus Torvalds Suspends Key Linux Developer

tibit Re:Discipline (641 comments)

I personally find Linus's post to be reserved. I'd have probably written "U fucking mad?" :)

about two weeks ago
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Skydiver's Helmet Cam Captures a Falling Meteor

tibit Re:More technical information also provided (142 comments)

IOW: There's no reason for it not to be 100% legit, except it's not a meteorite, it's a random rock from the place where the chute was previously packed. Possibly even not most recently packed.

about three weeks ago
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Skydiver's Helmet Cam Captures a Falling Meteor

tibit Re:More technical information also provided (142 comments)

Yeah, they're writing technical reports on shit that someone has packed into a chute. Oh, how easy it is for experts in field A to assume they have been born with knowledge from field B. Namely, those meteor experts who just don't get what every skydiver learns after a while: shit sometimes get packed into the chute. This whole thing is just so full of fail I don't know whether to laugh or cry.

about three weeks ago
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Skydiver's Helmet Cam Captures a Falling Meteor

tibit Re:Ummm, probably not (142 comments)

it fails to address how the rock got to the speed of several hundred km per hour by the time it flew past him

You can address it yourself. Gravitational acceleration is 9m/s^2. 300 km/h is 83m/s. The rock could have easily been going less than that, say 50m/s. It takes 6 seconds for it to accelerate to that speed from rest. It didn't start at rest.

about three weeks ago
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Linus Torvalds Suspends Key Linux Developer

tibit Re:Fire Linus (641 comments)

He was professional long enough. It didn't work. Kay doesn't seem to care enough if you're nice to him. As a leader, you have to use what works. Demonstrably, being nice to Kay was leading to nowhere. Granted, being not nice to Kay may not work either, but it's definitely worth trying. It's also worth it to let everyone else know that this kind of shit attitude (like Kay's) is not going to be taken lightly.

about three weeks ago
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Linus Torvalds Suspends Key Linux Developer

tibit Re:Fire Linus (641 comments)

The ongoing issue is Kay. I expect everyfuckingone to have an issue with him!

about three weeks ago
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Linus Torvalds Suspends Key Linux Developer

tibit Re:Discipline (641 comments)

He was trying discipline for the longest time with Kay. Eventually, he had no option but resorting to invectives. Sometimes you have to scream at your kid. Same here.

about three weeks ago
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Linus Torvalds Suspends Key Linux Developer

tibit Re:Someone has to be in charge (641 comments)

Yea, but if you mess up and do something he declares "STUPID", it's off to the public stocks for you in a flurry of expletives. IMHO Stuff like that just lacks class and reflects badly on him.

On the contrary, I think this doesn't reflect badly on him. Kay has been pushing it for ages, and there was nothing else to be done. It's in everyone's best interest that the public is warned a) not to try such tricks, b) to stay away from Kay until he improves his behavior. Remember, Linux kernel is developed in the open. Public scorn is to be expected. You don't like it, maintain your own fork, that's what git is for, you know.

about three weeks ago
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Linus Torvalds Suspends Key Linux Developer

tibit Re:Someone has to be in charge (641 comments)

Sometimes there is in fact a need for public shaming, I think. Kay asked for it, Kay got it delivered. It's as simple as that. Doing it in private would be a disservice to everyone. It's a developer community, there's no point for keeping this sort of thing private. It goes against the very grain of things, I think.

about three weeks ago
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NASA To Catalog and Release Source Code For Over 1,000 Projects

tibit Re:Wait... What? (46 comments)

Of course these days all of this can be done, too, much faster, on off-the-shelf hardware. Just because the hardware doesn't have tag bits doesn't mean your compilers can't implement them. I'm running a bit of safety critical code on a bunch of ARM CPUs and all of the data RAM contents are tagged, pointers are tagged, and there is also software-driven error correction for RAM, execution log, restarts, those sorts of things that were en vogue at one point or another in the "hi-rel mainframe" market.

I have a couple of off-the-shelf servers from Dell that not only have error correcting RAM, but also have a spare memory stick and can cope with the failure of an entire chip on a RAM stick. So what you hail so eagerly is - who'd have thought - a standard feature on off-the-shelf hardware that can be had under $2K.

about three weeks ago
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NASA To Catalog and Release Source Code For Over 1,000 Projects

tibit Re:Wait... What? (46 comments)

You're on to something here, but not for the reasons that you think. NASA has been releasing source for a long time. It's only that getting this source requires at least a mountainload of paperwork (U.S. citizens only, etc.), and it's usually costly. It's not like they don't have a catalog already. If it's going to be more of the same, then I'd call it outright deception. Note that nowhere it's stated that the code will be under a free source license!

about three weeks ago
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An Engineer's Eureka Moment With a GM Flaw

tibit Re:Right... (357 comments)

How about you drive 65 miles an hour around a curve in traffic and have someone else tuun off the ignition? whats that? you won't do it?

Had that happen, had a service brake failure (pinhole in the flex line), and had an ABS failure in very slippery conditions. I'm here to tell the tale, and nobody was hurt, and no paint was scraped. Pretraining is key, and anyone who has a car and hasn't figured out for themselves how to handle such situations is playing with human life for no good reason. You're supposed to actually try things out. It's easy, if you're not an oaf it's safe, so what's the deal?

about three weeks ago
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An Engineer's Eureka Moment With a GM Flaw

tibit Re:Public service announcement (357 comments)

in automatics because in drive the wheels can't turn the engine, so the engine comes to a complete standstill

Stop making shit up. It doesn't work that way at highway speeds, and at least in my car, the automatic transmission stays engaged if I turn off the engine, all the way down to 30mph or so.

about three weeks ago
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An Engineer's Eureka Moment With a GM Flaw

tibit Re:Only "discovered" someone's discover, nothing m (357 comments)

Yeah, sure, ha ha. Airbags often deploy so fast that by the time they are deployed, you are usually nowhere near the airbag. Even in fairly high-speed crashes you often impact an already deflating airbag. Never mind that modern cars have multi-stage airbags that inflate sufficiently for the severity of the crash.

Oh, and never mind that modern cars have many airbags that are nowhere near your front. I've personally checked out a side curtain, and it was quite nice. The T-bone felt like being pushed onto a bed by a rowdy kid jumping on you :) I didn't even get a headache.

about three weeks ago
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An Engineer's Eureka Moment With a GM Flaw

tibit Re:Only "discovered" someone's discover, nothing m (357 comments)

If part number changes, how will the customer know there is now a new part?

Every online part retailer worth their salt has some indirect access to car vendor's part database that, surprise surprise, includes part substitutions. Had you ordered any car parts online, especially ones that fail due to bad design and get redesigns/upgrades, you'd have seen it. This ignition switch part is rather unusual in this respect - a redesign was done without retiring the old P/N and having a "new and improved" P/N as a designated replacement.

On some cars, I've seen parts go through 2 or 3 rounds of such upgrade cycles. When I eventually pulled the failed part off the car and went to buy a replacement, there was a substitute part #1. That substitute was substituted with #2. Eventually, that one had substitute #3, which was orderable.

about three weeks ago
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An Engineer's Eureka Moment With a GM Flaw

tibit Re:Put away the pitchfork and torches (357 comments)

probably do not have insight into any safety critical functions that it plays when integrated with the larger vehicle

That's what PPAP and APQP are dealing with. In practice, those processes are used to ensure that the vendors understand what is expected of their parts in their intended end-use.

about three weeks ago
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An Engineer's Eureka Moment With a GM Flaw

tibit Re:Obligatory Fight Club (357 comments)

Just a company that does not want to pay money to do what they believe is killing babies.

They should be rightly shunned for acting on fantasies, as it were. What they believe here is a figment of a collective imagination of a whole bunch of people, unfortunate enough to be misled to believe such nonsense. Just sayin'.

about three weeks ago
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An Engineer's Eureka Moment With a GM Flaw

tibit Re:Obligatory Fight Club (357 comments)

In the particular case here, I don't quite get how an engine stall can cause loss of control? Going 50+mph, you don't care about power steering. Loss of brake assist might be an issue, and loss of ABS too if that was the case, but even then, I think in this one the driver shares 50% of the blame.

I've had hydraulic brakes fail, I've had ABS fail (with no MIL coming on), and in both cases some forethought and pre-training has immensely helped me. Yes, in both cases those were close calls, but through no fault of mine. No, nobody had me do it. I simply figured: I must know what to do in such cases, since there's never enough time to think. For example, if my accelerator-by-wire car ever had an UA on a road with some clearance ahead of me, I know that it wouldn't cause anyone any harm - I know how to handle it, and I routinely test my service brakes to ensure that they will stop the car in such a scenario even if I were to forget to switch to neutral (or the switching didn't have effect, as it may). The ECU doesn't have a brake throttle override, BTW.

about three weeks ago
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Subversion Project Migrates To Git

tibit Re:Change (162 comments)

OK, but should I need to know any of that?

Yes. I've found that there's no way to use it without knowing this. It's as simple as that, and I don't consider it a deficiency of git at all. You're supposed to understand the tools that you use. The things you speak of are not implementation details, they are part of the semantics exposed directly to the user. They make the whole thing work and useful.

Yes, the command line syntax is abhorrent, but then I almost never use it. SmartGit/Hg has won me over.

about three weeks ago
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Subversion Project Migrates To Git

tibit Re:April Fools! (162 comments)

The initial checkout from svn doesn't clone the entire history. With git, a shallow clone (--depth 1) doesn't either. Git's smart http transport is bound to be faster than svn, since compression can be applied across multiple files, and if there are similar files in the repository, their common chunks will always be factored out by design. With svn, it's not guaranteed and depends on how file copies/moves were managed.

about three weeks ago

Submissions

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MRI Magnets Cause Nystagmus

tibit tibit writes  |  more than 2 years ago

tibit writes "In an interesting twist on "it's so old it's new again", Johns Hopkins researchers led by Dale Roberts found what must have been causing much confusion for doctors the world over: strong external magnetic field can stimulate the semicircular canals, causing vertigo and nystagmus (pendular eye motion). It's a textbook case of Lorentz force in action: our angular rate gyros, the semicircular canals in the middle ear, filled with endolymph, have a ionic current flowing across. In magnetic field, the current produces a force that pushes the lymph along the channel, causing stimulation of the cupula — a pressure sensor at the end of the channel. This is interpreted by the brain as rotation of head in space, and causes a nystagmus that's supposed to stabilize the image on the retina. Of course the subject is laying down and not spinning in space, and the mismatch between inertial measurements coming from the ear and real situation causes vertigo."
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