So, when exactly ...
... does the next bus to SQL STATE arrive?
1271 posts • joined 16 Mar 2008
"They are using AI systems to alter images?"
That made me think of the Google Deep Dream program. This takes an image or video, applies recognition to it based upon its training and searches for features that it thinks it sees. It then takes the original and modifies it slightly to make it conform to what it thought it saw. Do this iteratively and the program has quite the, umm, imagination.
And no. I don't think I'd want my oncologist examining my x-rays with whatever that computer must have been high on..
"777s were grounded when their fuel gauges errored after the Gimli Glider Air Canada incident"
It was a 767. I don't think they were grounded, since the FQIS (Fuel Quantity Indication System) problem was already known and a manual work-around existed. Checking the fuel level with a dip stick. The whole running out of fuel incident occurred because of mis-calculations on the part of the flight and ground crews and other procedural problems.
It's basically hardware in a data center rack someplace plus a cookie-cutter O/S with basic tools (DBMS, web server, etc.). In my experience, these components have been the least of my worries when it comes to keeping me up at night. Most of the nightmares occur in the higher application levels. The one caveat to this is that many of these application level problems occur when someone (other than myself) takes it upon themselves to upgrade the lower level stuff, breaking my applications. And I get little or no say in the planning of that upgrade. Now I have to drop everything and test (and perhaps patch) against a new version.
I lose a lot less sleep with my own hardware and my own systems that I can manage on my own schedule. Even the data center isn't a panacea. One of the worst outages I witnessed in one of my enterprise app was when the data center people hired a bunch of contract techs to come in and clean up abandoned network cabling under the server room raised floor. Next thing we knew, production servers were dropping off line as they merrily went to work with their diagonal cutters.
"You can't easily go to another council."
In the short term, probably not. But if people are deciding whether to move in (or out), this sort of behavio(u)r might weigh on their decision. Same holds true of businesses deciding where to open offices or production facilities.
"rigorous enough to be identifying the majority of COVID-19 infections in a quick enough time"
And we are not likely to get that sort of coverage within a useful period of time. The best national coverage to date is Iceland, at 10% (the denominator is low). In a country with a sizable population, testing capacity will have to be huge since periodic retesting will have to be done. Last week, I may have tested negative. But since then, someone coughed in my face.
A more reasonable goal would be to test across a random sample of the population. A large enough sample to be statistically meaningful for epidemiological studies. But set aside the unreasonable goal of testing and retesting even a significant fraction of the population. The statistics will give the authorities what they need to know to lift travel bans and open up businesses while keeping an eye on the disease spread. All that will be needed is to pry a certain amount of the test capacity away from the VIPs.
And finally, the long term outcome of this pandemic is that practically everyone will get the disease. A few will die. Others will be immune or asymptomatic. Some will get a nasty cough and fever. Some of these will require hospitalization and maybe an ICU. But they will recover. All that needs to happen is to keep the treatment rate at a low enough rate so the number of cases at any time doesn't overwhelm the system until a vaccine is developed. Then, testing will no longer matter, as it will be treated much the same as a flu shot. Everyone gets one.
But in real operating systems the e-mail client, browser or any other applications run with the permissions granted to the user that runs them. And if configured properly, users (other than admin, root, etc.) don't have permission to mess with kernel data and trusted binaries.
"how fast does gravity propagate"
In a static situation, gravity doesn't propagate. It's just bent space. When one removes or adds some mass, the change in that bend propagates at the speed of light. Much as a wave travels along the surface of a pond.
... I used to work in an office that was maintained at 82 to 84 °F (28 °C). According to management, this was set "to save money on air conditioning costs". During the summer it was pure misery. During the winter it was sort of odd. But we assumed that the heat load in the building (people, lighting, computers, etc.) was so high that it just kept the building hot.
Then, we had the Nisqually Earthquake in the middle of winter. Operations were shut down for a week. When we finally did return to work, the building started out at 62 °F and warmed up to 68 °F by the end of the day. Pretty comfy. I asked one of the facilities guys what was up. It seems that they could not restart the gas fired boilers until a thorough inspection was conducted. So, no heat. Yeah, but what about the typical 82 °F? "We are not to touch the thermostat setting. Management edict due to air conditioning costs." But during the winter? You could put the AC setpoint at 82 °F and the heating setpoint at 66 °F. Turns out, the thermostat was too old to have two setpoints. And during the summer, it wasn't just delaying the AC from coming on, it was heating the building. But you couldn't tell the boss that. He was the kind of guy who would get red-faced and fly into a rage if someone challenged his edicts. And that included not going to the hardware store and picking up a new thermostat just to work around his orders.
... was implemented (poorly) to shut up a bunch of users who couldn't deal with password entries not echoing anything. This was the behavior of terminal based utilities since the first days of Unix. Part of the reasoning was that echoing anything back (like an asterisk) could allow a shoulder surfer to count the number of characters in one's password, making attacks easier. So patch requests were addressed with a WONTFIX. But the whining continued. And this is what we got.
If you cry long and hard enough, you can even get systemd.
We had an old Sun 'pizza box' workstation at Boeing that died. Just short of its weekly backup. I was walking by as the IT guy was explaining 'stiction' to the poor user, who was not thrilled with having to re-do a week's worth of work. I stepped up and said, "Well, there's nothing to be lost." Picked up the box, flipped on the power switch and gave the whole thing a violent twisting jerk. The disk spun up and I suggested that they run the backup right now.
"Boeing had just added code to allow the two flight computers to talk to each other – previously they operated independently." [italics are mine]
I suspect that this is at the core of the MCAS fix. And if it was the case that the FCs originally didn't have a communications link, this is a MAJOR software change. As anyone who has done asynchronous comms programming knows, getting the handshaking straight between two boxes is a non trivial exercise. Particularly if the underlying O/S and hardware was never originally spec'd to handle the kind of process preemption and interrupt handling needed.
"One thing I can think of that systemd does that sysv didn't is "status management" where if a service dies, it will be restarted."
Look at the respawn option in inittab
One of the (many) things that I don't like about systemd is that it's authors seemed to have blundered ahead blindly, claiming that some utility or other "can't do that" without even reading TFM to find out that it in fact can.
"vs not having MCAS at all"
It's possible that the FAA won't let Boeing do that, short of re-designing the MAX's aerodynamics to make it inherently stable. Boeing, of course, will be pushing for a simpler software and training fix at this point. No third AoA sensor and related FC computer and certainly no changes to aerodynamic surfaces, engine cowlings, etc. The problem with the current design, to use an automobile analogy, is that it handles (in pitch) like a car with bald tires and bad front end alignment without the automated correction system (MCAS). And the FAA might not accept such a bad stability situation, even with pilot training. I'd like to be a fly on the wall in the Boeing/FAA discussions on this topic.
This bug seems to imply that there is some memory that is shared globally between different user IDs on one box. So the state of one session (modal window in this case) can affect another. Not good. One wonders what other sorts of things one user can 'peek at' that another might be running.
"I was shocked at how uncontrollable a semi-auto was.
The instructor explained that they're not designed for accuracy, but for a "spray and pray" approach."
Are you certain you know what a semi-auto even is. You can't 'spray and pray' with one. It's one round fired per trigger pull.
"He must install an Imperial Censor"
We could call it the Ministry of Truth. I understand Winston Smith is looking for a job. Biden had better hope that this doesn't get implemented before his inauguration by the current administration. Or we may never hear from him again.
"In this day and age, anyone who brings a phone into the bedroom is asking for trouble"
Bedroom, den, kitchen, back yard, hotel room, etc. Things just seem to happen in some of the strangest places. It's getting so that you just can't whip your ...
... phone out anywhere these days.
I can see where the NSA/FBI are hesitant to spill many details to Congress at large. But Feinstein is vice chair of the Senate Intelligence Committee. One would expect that she has the clearance to be entrusted with at least an overview of these programs. On the other hand, Feinstein's refusal to be briefed in a closed session indicates that something odd is afoot.
Never mind Denmark, something is rotten in DC.
"Therefore I can use my map app to set my start point and end point"
I can do that right now in my 40 year old shitbox. It doesn't require self driving capability. Just me paying attention to the little voice.
The whole 'self driving' agenda is separate from electric cars, charging/re-fueling and related issues. It does seem to be closely attached to the shared car movement. And that opens up a whole other batch of issues. If I am willing to pay a premium for comfort, I might purchase an electric, self driving Bentley. But I'll be damned if I'm expected to put it in a loaner pool so some homeless bum can borrow it to make a liquor store run.
"Any unnatural radioactivity inside the body is bad radioactivity."
Natural or otherwise, it depends on the half-life of the isotope in question. Many Radium and Strontium isotopes have half-lifes measured in days. That means they are breaking down and releasing particles at a high rate. Uranium isotope half-lives range in the hundred thousand to billion year range.
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