Re: Those frequencies are too high
kHz (lowercase k uppercase H lowercase z)
dB (lowercase d uppercase B)
1897 posts • joined 28 Jun 2013
kHz (lowercase k uppercase H lowercase z)
dB (lowercase d uppercase B)
Home theater, sure. Don't use that every day.
TV speakers, seems unlikely that'd reach even 15kHz.
Some of you might know about the DO-178B/C process. Design Assurance Level 'A' and all that analysis and documentation. Often required for safety-critical software.
But AI often relies on 'machine learning'.
How do you certify a system that's been trained, not explicitly designed?
As far as I know, the tools you'd need to do 'code review' of the resultant training data do not even exist. Maybe they do, but I suspect there's a gap exactly there.
Some may try to claim that testing can support certification of such systems. They'd just need BILLIONS of hours of testing. This might take a while...
'Just around the corner.' Like flying cars. Like fusion power. Like Middle East peace.
jake "...you can be cited for this ... "
Citation are issued at the whim of the officer. I doubt that such a ticket would survive review by the prosecution, let alone a judge. A phone call to the prosecution would make it go away.
Many people are confused on this point. Similar to 'You can be sued...'.
AC: "Strong AI does exist today..."
AI exists, arguably.
Strong AI is still a dream.
"Now you have two cars crashing at the sum of their respective speeds..."
That's not how Physics works. Summing non-relativistic speeds, which are squared in the energy formula, would lead to creation of energy from nothing.
If two cars (same mass) doing 100 kmh crash head-on, that's basically the same as each hitting a brick wall at the very same, non-summed, 100 kmh.
Using bold print and being wrong must be embarrassing.
Some people actually believe that practical self driving cars are just around the corner. This implies that Strong AI is here, but it isn't. At best, they'll be in the way, being artificially stupid, and causing a trail of anger.
They don't even have an initial concept for precise lane keeping on snow covered roads.
Some even assume that traffic congestion can be solved by such self driving cars not being parked at 7:59am, but heading back out on the road, driving around empty. Scary what's inside some heads.
I'll betcha a dollar that this incident reminded the clever Google coders that they actually forgot to program in any concept of the Googly AI pulling over when the police so direct.
Quantum annealing is suppose to instantaneously consider all possible solutions at once, and then settle on the solution directly.
Factoring a big number becomes simple multiplication, f1 x f2 = given big integer
Assuming you'd have to use a legacy algorithm is obviously nonsense. Why on Earth would you make that assumption?
If a D-wave can't perform this simple canonical problem on demand, then it smells like BS-ware.
PS, your stackexchange link has a highly rated answer that supports my position.
Factoring keys. Wiki says: "For example as of May 2007, a 1039 bit integer was factored with the special number field sieve using 400 computers over 11 months."
400 computers. 11 months.
So I'd like to see D-Wave factor a 1000-bit integer in less than a millisecond. And this test shall be repeated N times in one morning, where N might be on the order of a hundred.
The last I heard, it wasn't entirely clear that this technology actually works. The above test would prove it conclusively. Why haven't they done this yet?
Did I miss the memo?
Register the name 'Crickhowell Smoker' as a Trademark. Write up a bill of sale and transfer ownership of the trademark to your offshore corporation in the sunny tax haven. Take the business profits, stuff them in an envelope, scrawl 'Trademark Usage Royalty Payment' on the envelope, and transfer it to the offshore Trademark holder. Then deduct these payments as a business expense in Blighty.
Four times a year, fly to the sunny tax haven to collect and spend your tax free profits. Of course, the profits can be converted to something portable and untrackable (diamonds, Bitcoin, modest cash), and moved back to Blighty. Or extracted from an ATM in Rio or NYC or Hong Kong, for a nice vacation.
Absolutely trivial. No need for anything any more complicated.
AC: "The router is a repeater and depends on another Internet connection to reach the Internet itself, but to lock onto signals properly, it needs the Internet connection to synchronize itself with all the other routers. Hello, Catch-22."
I don't think that you understand how NTP works.
"...the Internet itself."
I don't think that you understand the Internet either.
We seem to agree that the whole concept is daft.
If another time source is required, because your router can't get NTP where you live (huh!!??!!), then GPS provides a convenient source.
The real downside is cost, on the order of $10.
Good GPS chipsets are amazingly sensitive. I've got one in my basement, permanently locked on and happily blinking its LED at a synchronized to UTC 1 pps.
If your router is connected to the Internet, then it can execute a NTP inquiry. The End.
Self-organizing TDMA exists already. One example, Marine AIS. Self-organization is robust. No need for absolute external references. The End again.
The assumption that a batch of routers in a given location would agree on a given reference station belies a deep ignorance of, for example, the impact of multipath.
Your signal strengths may vary. Shifting a receiver by even a meter can make a big difference.
How is it even possible that you don't realize this? It's obvious.
Nanomaterial film that notches out the two most common laser pointer wavelengths.
First marketing approach was sheets of film installed in the aircraft windows just like window tinting is installed in cars.
Mk II marketing approach is goggles or glasses.
Been around for about a year, roughly.
At least these ones actually work.
It seems obvious that such noise should be packaged up into 1kB blocks, and then written to pairs of multi-TB SSDs for physical distribution. The hardware would look like a HDD duplicating machine.
"Several TB of One-Time Pad should be enough for anyone."
Missing ballot box should result in a call to the police.
Blues & Twos until they track it down.
Replace suspect computer with human, for purposes of illumination.
"Are you okay? Trustworthy? Not working for the enemy?"
Yes. Very trustworthy. Not working for the enemy.
"Well. Okay then...
...HE'S OKAY. HE TOLD ME..."
IT security is a bit like that.
The USB sticks with "built in security" obviously have an ARM processor (or similar) inside.
.: They can be hacked too.
Security is an illusion.
Ref conference videos on CCC.de. <- mandatory viewing.
Tom Scott on Computerphile: "Why Electronic Voting is a BAD Idea"
That is all. It really is.
JM "Given that the difference in time between two altitudes for the entire mass of the Earth is 140 parts per million I think any distortion will add the tiniest of variations to that."
Check your math.
140 ppm is about 12s per day of your purported "difference in time between two altitudes".
We would have noticed that, even with a grandfather clock.
The article was written incorrectly.
The original extract was "ran 140 parts in a million of a second faster", which was simply wrong.
Forget the bad English; anyone else notice that it makes no sense numerically?
"140 parts in a million" is about 12 seconds PER DAY.
You could measure that with a grandfather clock for gawd's sake (perhaps not in zero g).
It's OBVIOUSLY INCORRECT as written.
"We came in peace for all mankind."
If the USA achieved their utmost pinnacle, that might have been it right there.
Network Address Translation.
One can have tens of thousands of gadgets hidden behind one external IP address.
How did you post this inherently self-contradictory claim?
Somewhere I read that one of the potential astronauts (Ed White?) was a fraction of an inch too tall. So he spent the previous evening jumping off his bed with his knees locked to compress his spine. Worked.
The mission will terminate early due to food cravings.
They'll be sitting around their Martian shelter, playing tiddlywinks in the low gravity environment.
Somebody will say, "I sure miss doner kebobs...", and the mission will terminate with immediate effect.
Goal: achieve the longest possible Siri-Cortana conversation with one human utterance to initiate. Two devices permitted of course.
Extra points for an endless loop... Cortana: "Isn't!" Siri: "Is too!" Cortana: "Isn't!" ...
Prize is one e-Beer as shown.
I hope that this money issue doesn't get in the way of universal 'net access.
I saw it on TV, a show about a Might (Cable Laying) Ship with a flat bottom that can park on the bottom at low tide.
They had a underwater sand blower machine to re-bury the cable where required.
But deep down (1km+), they don't bother.
"...didn't have a passport."
Only takes a few days in urgent circumstances.
I don't think that you understand the situation.
Not exactly a 'chipset'.
^- link to the whole thing.
"...late 90's..." .NE. <oldfartmode>
"...buy the magazine CDs as it saved a 20MB download of Netscape which was a good couple of hours on 28.8kbps dial-up."
In the early 1980s, we typed in three pages of BASIC every month.
Maybe stored it to cassette tape.
More like 1978. 300 baud rubber cup thingy.
By 1980 we had a half dozen computers at our family home.
And no doubt even before then...
Back in the pre-web Newsgroups days, after about a week of naïve trouble-shooting, I finally picked up the damn phone and heard this...
"The number you are calling has been changed..."
Lesson was learned.
AB "...based on that chipset."
Using the phrase 'chipset' in this context is a stretch.
Not strictly wrong, but will mislead the noobies. They won't assume it's built up from low level gates.
"...which CPU's assembly language they need to be fluent in..."
If you understand a) what was written, b) the technology of the time as used in space vehicles, and c) what the hardware designers would have HAD to do, then you'd already know that it must be a custom design built from the ground up using gates.
You're not hired.
PS: Note the '18-bit', 18 not being a power of two.
You can bet your bippy it was perfectly optimized for the application.
A commentard the other day was confused on this point.
Moscow is to the left of the Ural mountains.
"There are standards for avionics, shockingly..."
The nice thing about standards is that there are so many from which to choose.
"...you don't want lots of redundant wiring in an aircraft if you can avoid it as it takes away from the available payload..."
You only put in the "redundant" (sic) wiring that any idiot can foresee will be required. You just put it in early to make your life easier down the road.
The Prime Meridian has been moving around a bit over the years. You can see the different slots for the different instruments over the years. And now the WGS-84 one is something like about 100 feet from the ceremonial brass track.
edit: Wiki says, "The WGS 84 meridian of zero longitude is the IERS Reference Meridian, 5.31 arc seconds or 102.5 metres (336.3 ft) east of the Greenwich meridian ..."
JR wrote: "That 364.25 is akward..."
365 (not 364) and .2425 (to be a bit more precise).
The 0.2425 is from the Leap Year rule:
Every four years (+0.25),
but not every 100 years (-0.01),
except every 400 years (+0.0025).
And awkward is spelled 'awkward'.
Plenty of examples in history of pure theory informing and guiding the experimentalists.