In fact, even with two sensors how does the system know which one is the malfunctioning sensor?
It doesn't, but that's nothing unusual. There are many systems on modern aircraft which involve dual sensors. When one malfunctions, the aircraft throws up a maintenance message basically saying "there's something wrong with this system".
Here's the problem, though: if you have 2 sensors, one of which is malfunctioning, and they're giving different readings within the normal operating range, which one do you rely on and why?
The 737 MAX 8 is equipped with 2 angle-of-attack sensors. Currently only 1 of the 2 is referenced during any given flight by the MCAS (which switches with weight-on-wheels). Even if you now obtain and compare readings from both during a flight, which one do you rely on to trigger the MCAS?
If you go by the one with the higher AoA reading, you're in the same situation that you were in previously (i.e. that the aircrew were in on the fatal flight).
If you go by the one with the lower AoA reading, you risk missing a potential stall due to an undetected high angle condition.
The suggestion of a 3-sensor voting comparison at least gives you a fighting chance to determine which sensor is giving the correct reading.
So, why didn't the aircrew from the previous day's flight pass that incredibly valuable information along to the next crew? Leave a note in the cockpit? Tape over the auto-trim disable switch in the Off position? Talk with someone responsible for staffing on the ground to pass along the details of the problem and the solution? I'm sure it was discussed with maintenance -- as evidenced by the work done on one of the angle-of-attack sensors overnight before the fatal flight -- but was anyone else made aware of the problem and solution? There seems to have been a distinct lack of forward communication... and that's very troubling.
Your contribution is one of the best things I've read on Slashdot in a very long time: informative, insightful, AND interesting! Thanks for taking the time!
Actually, it is. While it might be no match for jets and tanks, the average citizen has weaponry that is pretty much a match for any small arms. Whether or not they have the skills or numbers to effectively fight a SWAT team or other para-military force is another matter, but in general the weapons aren't a problem.
Except, you know, the tyrants generally DO have jets and tanks and the insurgents generally don't -- as in Syria. Bullets against armour, smart bombs, and chemical weapons... the weapons ARE a problem. There's no comparison. Mosul presented exactly this scenario; Daesh (despite holding out for a remarkably long time) didn't fare too well, ultimately.
However, you don't need to burn anything to melt ice.
Um, no. Clathrates are not (water) ice; they are crystalline structures of water and methane (or other hydrate formers -- typically hydrocarbons). They are not stable at typical conditions at the surface of the earth (which is why they typically form at depth under the ocean floor -- or in the wellbores of gas-producing wells). They decompose readily, releasing methane, when exposed to reduced pressure... something any drilling engineer with northern/offshore experience can tell you.
To get clathrates to melt, you can reduce the pressure and/or hit them with a slug of methanol. Either measure would be something that any gas producer would be familiar with. It wouldn't be too hard to implement a production scheme along these lines and there has already been academic work published which considered a pilot scheme for Alaskan off-shore hydrate zones.
And if you haven't yet read it, John Fogerty goes on along the same lines in his very readable autobiography, "Fortunate Son: My Life, My Music". Reading what Fantasy Records under Saul Zaentz did to that poor bastard made my blood boil... so I went online and stuck it to Fantasy by ripping all the CCR streams I could find on YouTube.
According to BleepingComputer.com, you can vaccinate against NotPetya by creating and adding 3 write-protected files to your C:\Windows folder: perfc, perfc.dat, and perfc.dll.
Content doesn't matter but "Read-only" status does.
on punched cards, put through a reader and then waiting for the operator to tear off your dot-matrix printed output to find out why it failed to compile (again). Within the hour, if they weren't too busy.
Later on a teletype connected via Gandalf modem to a Honeywell multics timesharing system.
Still later on a monochrome green CRT -- the first CRTs I'd ever seen. And the computer would respond in real time!
Finally from home on a Compaq luggable via 300 or 1200 baud modem over a telephone line. And then things really took off.
Not from Calgary, by any chance, are you? They brought in Multics in my 3rd year of engineering -- after I'd already put in 2 years of late nights in the computing centre in the basement of Math Sciences, submitting FORTRAN programs in the form of punched card decks.
I can still read it, too; I read a paper last year with a FORTRAN subroutine printout appended and was able to pick out the transcription errors (undoubtedly made by the secretary who typed it up) which would have prevented it from compiling in the first place.
How is this even legal? It is a crime to waste the money of corporations..
It is a crime to waste the time of Slashdot readers with idiotic drivel like this.
Maybe some of these tech support companies will put him in prison or send someone to physically harm him.
The first of your suggestions is ludicrous. The second is (surprisingly, coming from you) indeed possible -- provided they can find him. They are criminal enterprises, after all. And there's hope for you! You actually had a coherent thought!
Donald Knuth is an elitist. It is not necessary to have a background in mathematics to write software.
By this standard, anyone striving to enhance general knowledge in a field is an elitist. Albert Einstein was an "elitist". Richard Feynman was an "elitist". Carl Sagan was an "elitist".
I taught myself PHP and I certainly don't have any kind of mathematics background whatsoever. It isn't dumbing down as he claims. It's about creating opportunities. If you can code and you can do it well without mathematics, so be it. The math side is for those that want to do research. I work in the real world....
As you didn't invent PHP yourself, you stand on the shoulders of giants to achieve what you are doing. Those giants quite possibly benefited from the work of Donald Knuth -- one of the true trailblazers of the field. Unknowingly and unwittingly, therefore, you are a vicarious beneficiary of his work. Have some respect.
But the country insists on ignoring these systems. Oddly enough, every time this topic comes up on/., a nominally nerd-oriented side where I'd expect people to be fascinated by them, I post about them... and nearly always get ignored.
That's because you're making good sense. This is certainly not the forum for that.
I thought the same thing until I read TFA a second time. The authors mention oil production practices -- depletion without fluid replacement, which is rarely done anymore -- and they specifically cite an instance of an existing well located over the epicenter of the 1933 quake being deepened and surging in production 9 months prior to the actual quake. They go on to say that because production practices changed after 1935, no further correlation of quakes with drilling/production activity in the LA basin have been found. So there are mechanistic hints here: pressure depletion (evidenced by land subsidence) changing the energy balance in underlying strata.
I wonder if anyone has looked at the Middle East oil fields -- where primary production was common practice for much longer and wells are hugely prolific -- to see if there is a similar correlation with seismic activity there?
What has this person done of note, other than charge lots of money for a product? I imagine some here will try to be civil, and ask him a serious question, but why? He is not a remarkable person, so please do not treat him as such. I know, I know, everyone is interesting in their own way, but then, we might as well interview a stomped cockroach on Slashdot next.
I'd really rather hear from the stomped cockroach.
Or, you know, they could use the hard drive LED to blink out the information they want to extract in Morse code with the cell phone camera set to record the transmitted data. I mean, holy crap, at some point this all becomes a little ridiculous.
"[...] reluctance to overthrow sovereign Libyan leader Muammar Gaddafi [...]"
In what dreamworld of Assange's was Gaddafi a "sovereign" leader by any stretch of the imagination? That's just ludicrous! Gaddafi seized power in a military coup in 1969 and clung to power for the next 42 years as a murderous despot. He is not forgotten and he is never missed. Libyans themselves shot him when they finally got the chance.
So... that part is just complete horseshit, Julian.
Slashdot Mirror
In fact, even with two sensors how does the system know which one is the malfunctioning sensor?
It doesn't, but that's nothing unusual. There are many systems on modern aircraft which involve dual sensors. When one malfunctions, the aircraft throws up a maintenance message basically saying "there's something wrong with this system".
Here's the problem, though: if you have 2 sensors, one of which is malfunctioning, and they're giving different readings within the normal operating range, which one do you rely on and why?
The 737 MAX 8 is equipped with 2 angle-of-attack sensors. Currently only 1 of the 2 is referenced during any given flight by the MCAS (which switches with weight-on-wheels). Even if you now obtain and compare readings from both during a flight, which one do you rely on to trigger the MCAS?
If you go by the one with the higher AoA reading, you're in the same situation that you were in previously (i.e. that the aircrew were in on the fatal flight).
If you go by the one with the lower AoA reading, you risk missing a potential stall due to an undetected high angle condition.
The suggestion of a 3-sensor voting comparison at least gives you a fighting chance to determine which sensor is giving the correct reading.
So, why didn't the aircrew from the previous day's flight pass that incredibly valuable information along to the next crew? Leave a note in the cockpit? Tape over the auto-trim disable switch in the Off position? Talk with someone responsible for staffing on the ground to pass along the details of the problem and the solution? I'm sure it was discussed with maintenance -- as evidenced by the work done on one of the angle-of-attack sensors overnight before the fatal flight -- but was anyone else made aware of the problem and solution? There seems to have been a distinct lack of forward communication ... and that's very troubling.
Your contribution is one of the best things I've read on Slashdot in a very long time: informative, insightful, AND interesting! Thanks for taking the time!
Actually, it is. While it might be no match for jets and tanks, the average citizen has weaponry that is pretty much a match for any small arms. Whether or not they have the skills or numbers to effectively fight a SWAT team or other para-military force is another matter, but in general the weapons aren't a problem.
Except, you know, the tyrants generally DO have jets and tanks and the insurgents generally don't -- as in Syria. Bullets against armour, smart bombs, and chemical weapons ... the weapons ARE a problem. There's no comparison. Mosul presented exactly this scenario; Daesh (despite holding out for a remarkably long time) didn't fare too well, ultimately.
Pro tip: whenever ANY tyrannical régime is enforced, it is done so with the aid of weapons/guns.
Pro tip #2: whenever freedom is defended against a tyrant, it is done so with weapons/guns (even democratically created laws are enforced by guns).
Yep, that's working real well in Syria.
How the hell did PP get modded "Informative"? The poster didn't have to google for that information; it's plainly stated right in TFA.
Melting 1kg ice takes 333.5kJ of energy.
However, you don't need to burn anything to melt ice.
Um, no. Clathrates are not (water) ice; they are crystalline structures of water and methane (or other hydrate formers -- typically hydrocarbons). They are not stable at typical conditions at the surface of the earth (which is why they typically form at depth under the ocean floor -- or in the wellbores of gas-producing wells). They decompose readily, releasing methane, when exposed to reduced pressure ... something any drilling engineer with northern/offshore experience can tell you.
To get clathrates to melt, you can reduce the pressure and/or hit them with a slug of methanol. Either measure would be something that any gas producer would be familiar with. It wouldn't be too hard to implement a production scheme along these lines and there has already been academic work published which considered a pilot scheme for Alaskan off-shore hydrate zones.
Great story!
... so I went online and stuck it to Fantasy by ripping all the CCR streams I could find on YouTube.
And if you haven't yet read it, John Fogerty goes on along the same lines in his very readable autobiography, "Fortunate Son: My Life, My Music". Reading what Fantasy Records under Saul Zaentz did to that poor bastard made my blood boil
According to BleepingComputer.com, you can vaccinate against NotPetya by creating and adding 3 write-protected files to your C:\Windows folder: perfc, perfc.dat, and perfc.dll.
Content doesn't matter but "Read-only" status does.
No, private industry with a profit motive will always be more efficient than government bureaucrats with no motive at all for efficiency and service.
Two words: Turing Pharmaceuticals
Yep, paragons of efficiency. Efficiently removing money from the pockets of the ill and the disadvantaged, that is.
I hope they lose enough money they go OUT OF BUSINESS!!!
Yeah, another few quarters of $91 million net income will drive them right into the ground.
on punched cards, put through a reader and then waiting for the operator to tear off your dot-matrix printed output to find out why it failed to compile (again). Within the hour, if they weren't too busy.
Later on a teletype connected via Gandalf modem to a Honeywell multics timesharing system.
Still later on a monochrome green CRT -- the first CRTs I'd ever seen. And the computer would respond in real time!
Finally from home on a Compaq luggable via 300 or 1200 baud modem over a telephone line. And then things really took off.
Not from Calgary, by any chance, are you? They brought in Multics in my 3rd year of engineering -- after I'd already put in 2 years of late nights in the computing centre in the basement of Math Sciences, submitting FORTRAN programs in the form of punched card decks.
I can still read it, too; I read a paper last year with a FORTRAN subroutine printout appended and was able to pick out the transcription errors (undoubtedly made by the secretary who typed it up) which would have prevented it from compiling in the first place.
[...] when customers connect to Office 365 services using a legacy version of Office, "they're not enjoying all that the service has to offer."
"Enjoy" is not a word I normally associate with using Microsoft software. "Endure" is better
Oh come on -- what fool modded PP as "Insightful"? It was meant to be FUNNY, people!
Saskatchewan -- the only truly rational province in Canada. Seriously.
- a British Columbian
How is this even legal? It is a crime to waste the money of corporations..
It is a crime to waste the time of Slashdot readers with idiotic drivel like this.
Maybe some of these tech support companies will put him in prison or send someone to physically harm him.
The first of your suggestions is ludicrous. The second is (surprisingly, coming from you) indeed possible -- provided they can find him. They are criminal enterprises, after all. And there's hope for you! You actually had a coherent thought!
Donald Knuth is an elitist. It is not necessary to have a background in mathematics to write software.
By this standard, anyone striving to enhance general knowledge in a field is an elitist. Albert Einstein was an "elitist". Richard Feynman was an "elitist". Carl Sagan was an "elitist".
I taught myself PHP and I certainly don't have any kind of mathematics background whatsoever. It isn't dumbing down as he claims. It's about creating opportunities. If you can code and you can do it well without mathematics, so be it. The math side is for those that want to do research. I work in the real world ....
As you didn't invent PHP yourself, you stand on the shoulders of giants to achieve what you are doing. Those giants quite possibly benefited from the work of Donald Knuth -- one of the true trailblazers of the field. Unknowingly and unwittingly, therefore, you are a vicarious beneficiary of his work. Have some respect.
Time to break out the popcorn, sit back, and watch the fun on Lombard Street
But the country insists on ignoring these systems. Oddly enough, every time this topic comes up on /., a nominally nerd-oriented side where I'd expect people to be fascinated by them, I post about them... and nearly always get ignored.
That's because you're making good sense. This is certainly not the forum for that.
I thought the same thing until I read TFA a second time. The authors mention oil production practices -- depletion without fluid replacement, which is rarely done anymore -- and they specifically cite an instance of an existing well located over the epicenter of the 1933 quake being deepened and surging in production 9 months prior to the actual quake. They go on to say that because production practices changed after 1935, no further correlation of quakes with drilling/production activity in the LA basin have been found. So there are mechanistic hints here: pressure depletion (evidenced by land subsidence) changing the energy balance in underlying strata.
I wonder if anyone has looked at the Middle East oil fields -- where primary production was common practice for much longer and wells are hugely prolific -- to see if there is a similar correlation with seismic activity there?
What has this person done of note, other than charge lots of money for a product? I imagine some here will try to be civil, and ask him a serious question, but why? He is not a remarkable person, so please do not treat him as such. I know, I know, everyone is interesting in their own way, but then, we might as well interview a stomped cockroach on Slashdot next.
I'd really rather hear from the stomped cockroach.
Or, you know, they could use the hard drive LED to blink out the information they want to extract in Morse code with the cell phone camera set to record the transmitted data. I mean, holy crap, at some point this all becomes a little ridiculous.
If MS made this a 1st class citizen of Visual Studio it might gain some traction.
The same Visual Studio that phones home with telemetry about what you're coding and how well it's going? Yeah, thanks very much but no thanks.
I mean, the irony is hilarious: Microsoft (MICROSOFT!) being concerned about language safety issues!
"[...] reluctance to overthrow sovereign Libyan leader Muammar Gaddafi [...]"
In what dreamworld of Assange's was Gaddafi a "sovereign" leader by any stretch of the imagination? That's just ludicrous! Gaddafi seized power in a military coup in 1969 and clung to power for the next 42 years as a murderous despot. He is not forgotten and he is never missed. Libyans themselves shot him when they finally got the chance.
... that part is just complete horseshit, Julian.
So