I was working on repairing damage to a machine I built that was caused by an electrical fault, it fried the VFDs in two large (400hp) air compressors. Our only option to get back up and running was to rent one fixed speed compressor, and one variable speed compressor while we waited for new drives. Large induction motors hooked to large inertial loads do not play nice, so they typically wire them up as star-delta, so the motor is wired in a series configuration to control inrush while it gets up to speed, then once the RPM is stable, there's one set of contractors that opens up, and another that closes shortly after that connects all of the windings in parallel. The timing of this is critical because as soon as you open the series connection for the windings, the motor begins to slow down, when you engage the parallel connection, you want the motor to be as close to synchronized as possible to prevent "horrible things happening" well the control was configured for 50hz (rental) and we obviously connected it to 60hz. The technician from the compressor company never thought to check that setting, and I've never been so amazed in my life. The whole compressor about the size of a small shipping container made it to about a 30 degree angle before slamming back down on to the concrete. Fortunately we had the breakers set to cut at 60,000 amps and that prevented it from being worse, but the main contractor in that compressor exploded when it tried to handle the current.
I believe there was an article on/. a few years ago. They were able to correlate the mains frequency present in a recording to verify the time of the recording and use it as evidence as to the validity of the recording.
Then the second amendment will be amended to give the guns to the MPAA / RIAA / AT&T / Comcast so they can shoot you for being a pirate, while blocking your ability to bitch about not having a fair trial.
You have to wonder too how much the AI is pouring over every new virustotal submission, and web scrape, giving the Google researchers insights as to what vulnerabilities are really out there as the bad guys try to develop them undetected.
We used to use a lot of fixed point math that you could configure to get the range and resolution needed. It's amazing how well optimized these systems were. Much of the expensive math and rational number problems were invisible because of the internal data representations being carefully planned.
There was a dll generated at build time that provided information to properly convert the internal representation to engineering units. It was very interesting doing the conversions Divide 63,000,000 by foo, then add bar times 0.015625 and divide the result by pi and you get RPM!
I used to work for Mercury Marine, and they changed the rubber used to make the bellows that seals the driveshaft and shift cables under water.
The new material lasted about 3 - 5 times as long as the old, and replacement is a very expensive job, so it was advertised heavily as a product improvement.
Unfortunately rodents found it very tasty, even water rodents. There were lots of sunken boats!
Slashdot Mirror
I was working on repairing damage to a machine I built that was caused by an electrical fault, it fried the VFDs in two large (400hp) air compressors. Our only option to get back up and running was to rent one fixed speed compressor, and one variable speed compressor while we waited for new drives.
Large induction motors hooked to large inertial loads do not play nice, so they typically wire them up as star-delta, so the motor is wired in a series configuration to control inrush while it gets up to speed, then once the RPM is stable, there's one set of contractors that opens up, and another that closes shortly after that connects all of the windings in parallel.
The timing of this is critical because as soon as you open the series connection for the windings, the motor begins to slow down, when you engage the parallel connection, you want the motor to be as close to synchronized as possible to prevent "horrible things happening" well the control was configured for 50hz (rental) and we obviously connected it to 60hz. The technician from the compressor company never thought to check that setting, and I've never been so amazed in my life. The whole compressor about the size of a small shipping container made it to about a 30 degree angle before slamming back down on to the concrete. Fortunately we had the breakers set to cut at 60,000 amps and that prevented it from being worse, but the main contractor in that compressor exploded when it tried to handle the current.
Wish I had a video of that!
I believe there was an article on /. a few years ago. They were able to correlate the mains frequency present in a recording to verify the time of the recording and use it as evidence as to the validity of the recording.
Apparently they're up to 360 terabytes on a 3.75 inch disk.
Ol Musky put one in the glovebox of his roadster!
https://techcrunch.com/2018/02...
Diaspora might finally get some users!
How sex saved the social network!
http://wiki.laptop.org/go/XO-2
The OLPC XO-2 did have two identical displays, maybe having one be OLED makes it novel enough to call their own...
Probably has more rounded corners too!
Ding Ding Ding!!!
We have a winner:)
Then the second amendment will be amended to give the guns to the MPAA / RIAA / AT&T / Comcast so they can shoot you for being a pirate, while blocking your ability to bitch about not having a fair trial.
You have to wonder too how much the AI is pouring over every new virustotal submission, and web scrape, giving the Google researchers insights as to what vulnerabilities are really out there as the bad guys try to develop them undetected.
I'm betting that's why Google has a network that's wide open, but access to anything is carefully controlled in other ways.
GNUMaps?
They must be setting it down wrong!
Wouldn't it be:
Di(â®)e b(©â)g br(aâ%®m)ther?
I just got the Moto E4 plus
5000 mAH battery!
Right now...
Last full charge 1 day and 18 hours ago.
79 percent charge approx 1 day and 23 hours left.
I didn't charge it last night, and I'm not charging it tonight. It has quick charge, so it only needs a couple hours to fully charge anyways.
Easy to unlock (not Verizon model) from Motorola, root it, do whatever you want with it!
https://xkcd.com/1739/
Heard that one before!
Third party, as in:
Alexa, can you tell Siri to...
Half of the same fools don't believe we landed on the moon either!
http://www.toshiba-memory.com/...
Ever used these? I just bought one a few months ago.
https://github.com/M66B/XPriva...
Should be standard
Allow me to be the first to wish you a happy New year:)
Cheers!
They're even worse this year:)
And don't even mention a "dirty bomb" to them!
We used to use a lot of fixed point math that you could configure to get the range and resolution needed.
It's amazing how well optimized these systems were. Much of the expensive math and rational number problems were invisible because of the internal data representations being carefully planned.
There was a dll generated at build time that provided information to properly convert the internal representation to engineering units. It was very interesting doing the conversions
Divide 63,000,000 by foo, then add bar times 0.015625 and divide the result by pi and you get RPM!
I used to work for Mercury Marine, and they changed the rubber used to make the bellows that seals the driveshaft and shift cables under water.
The new material lasted about 3 - 5 times as long as the old, and replacement is a very expensive job, so it was advertised heavily as a product improvement.
Unfortunately rodents found it very tasty, even water rodents. There were lots of sunken boats!
I worked on a boat with a 200 kWhr battery, to think of being anywhere near it if we sank was terrifying. 144,000 18650 cells!
Right! Dangit, they just keep gaining altitude!