Your point is correct, but your math looks a little off.
850 mHz= 850 milliHertz =.85 Hz = a little under once per second.
2500 mHz = 2500 milliHertz = 2.5 Hz = two and a half times per second.
Ah, crap, yes, you're absolutely right.
Somehow, I managed to base my numbers on periods of "every $mHz seconds",
which is total bollocks of course. I don't really have an excuse for that right now...
Yep. I call shenanigans. I doubt there's a commercially available AA battery that'll reliably keep its charge for 10 years, much less power something.
My alarm clock (seven-segment hh:mm:ss display, radio controlled) is running on one single
AA battery since at least late 2004, so it is going into its 8th+ year now. It is a completely standard
1.5V AA cell made by TDK (or at least sold under their name).
No, I haven't checked the battery for radiation yet. Yes, it is beginning to scare me a bit.
Would it be possible then that an underwater nuclear explosion would be less devastating than an overground one due to absorption of energy by the water?
If you are above the water surface (and outside the immediate blast zone of the
big splash), this is certainly the case. There's also less fallout.
If you are below the water surface - e.g. in a submarine - it's an unhealthy place
to be: the pressure wave propagates much better in water than in air and will just
crush the hull in the broader vicinity of the explosion.
This again is different from a tsunami: a sub in deep water doesn't really care about a
tsunami rolling by, and might not even notice it at all.
I wasn't quite being as literal with the touch of a button statement, just the idea that it can be used is terrifying enough. You could probably drop it in the sea and create a tidal wave so big it would cover a medium sized country. It wouldn't just reduce navies near by, it would eradicate anything near the entire ocean.
You seriously underestimate what is needed to cause a decent tidal wave.
If used as a "wave generator", this bomb could cause wet feet in a single harbour,
and only if detonated close enough (under 20km, lets say. It probably even needs
to be closer than that, I haven't done the math) but that's pretty much all.
Earthquakes triggering big tsunamis are vastly more powerful, and also work differently:
Big submarine earthquakes permanently displace huge amounts of water - in the case
of the Japan tsunami, over 100 cubic kilometers.
A big bomb just causes a pressure wave, and no permantent water displacement:
There is no hole in the ocean afterwards.
I don't believe there is any way to shut down GPS at the source other than globally.
Yes there is. That's one of the reasons why "selective availability" (i.e. intentionl signal degradation)
on the civilian GPS signal has been switched off: GPS is now split into "GPS regions", which can be degraded or even disabled individually. It's a simple timing thing - the satellites know where they are
after all.
Of course, the implementation is still tricky - but I guess that's why SA was used instead of this
in the first place: it took a while to figure it out.
I knew someone would object and bring up gtkpod/libgpod. I had a paragraph
about that in my reply's first draft, but replaced all of it with the word "reliable".
Yes, libgpod works well on the devices it supports.
It took ages (close to two years) for gtkpod to support the 5th gen nano, for example.
The 6th gen nano is still unsupported today, nearly 14 months after its launch.
So, go on, tell people they have to wait for over a year if they want to use their shiny
new iThing without iTunes. Good luck.
Why did the Go-Pro shield melt on the way up? Was it the heat conducted through the tube from the burning engines or something?
Air friction. That thing went nearly 1 km/s in still quite dense air.
If you look at the details, you can see the shield melted from the outside in.
It was also meant to be made out of machined metal, but they apparently had
to go with the 3D printed plastic prototype due to time constraints.
I'm a bit taken aback that they've allowed a non-European country to join, but the
United States is still relegated to "Observer status" (E.g. 'Source of $$$, but not allowed to participate or become a full member')
Then you'll be glad to know that the US are not a "source of $$$" for CERN: CERN budget by states [2009 budget, seems to be the newest available].
Yes, goods and services (designing and building stuff) did and do come from the US too, but those
happen with full scientific involvement of several big American universities and research facilities.
I have no idea where you got the idea from that the US don't participate in CERN research,
or are even somehow forbidden to do so.
Apparently something like a WiFi card can generate a strong enough signal that blows the amplifiers of the telescopes.
LOL check out the inverse square law and get back to me... If that were the case, aircraft over new york state would utterly vaporize them.
Well, not "blow" in the sense of destroying the amplifier, but in the sense of
completely drowning the signals they are looking for.
Radio astronomy looks for signals in the Picowatt range, so the some-100-mW
Wifi signals will still be an order of magnitude stronger more than 100km away
(not considering topography etc).
Airplane radios are a big annoyance too, but fortunately don't emit much in the astronomically
interesting GHz range - Wifi does.
Yep - that's the problem with nuclear waste material: Putting them into different
molecules doesn't make the atoms less radioactive. Only time (or, in some very
specific cases, neutron irradiation) will do that.
What this does is turning radioactive waste into living radioactive waste...
Nope. Lots of countries tie their exchange rate to the dollar.
That used to be true at the time of Bretton Woods, which failed during the 1970s. Few still do.
(all the green ones peg to USD)
If you exclude the petrol exporting states on the Arabian Peninsula (their main and often close to only
income is in USD, so they don't have too much of a choice), you are left with huge economic powers
like Zimbabwe, Cuba, Eritrea, Venezuela, and a couple of tiny islands and Central American states.
Certificates are good for encryption. That's it. With the insane amount of "trusted CAs"
that come pre-trusted with every browser nowadays, that's all that is possible.
Hoping to achieve anything beyond that is naive.
Use a $495 Verisign certificate
– People will come to your site
Use a $9.95 budget CA certificate
– People will come to your site
Use a $0 self-signed certificate
– People will come to your site
Use an expired or invalid certificate
– People will come to your site
Use no certificate at all, just a disclaimer saying that you’re secure
– People will come to your site
Slashdot Mirror
IPv6 day never was about the separate v6 domains - those existed and worked
before IPv6 day, and of course keep on working.
However, IPv6 day added AAAA records to the generic domains,
www.google.com, www.facebook.com etc.
And those records are gone again.
Exception: google whitelists some known-working networks and includes the
AAAA records in DNS replies to machines in those.
Your point is correct, but your math looks a little off.
850 mHz= 850 milliHertz = .85 Hz = a little under once per second.
2500 mHz = 2500 milliHertz = 2.5 Hz = two and a half times per second.
Ah, crap, yes, you're absolutely right.
Somehow, I managed to base my numbers on periods of "every $mHz seconds",
which is total bollocks of course. I don't really have an excuse for that right now...
LTE spectrum ranges from 850 mHz to 2500 mHz
No it doesn't. That would be MHz.
The frequencies you cite range from "roughly every 15 minutes" to "35 times a day".
The bitrates achievable at those frequencies are rather low...
In other words: YES, damned, case matters with SI prefixes.
Likewise, they are turning out 1-2 new attack subs and 1-2 new ballastic subs each year.
I'm not entirely familiar with that concept. Are those the permanently submerged ones?
Siemen's, seriously?
OK, the apostrophe now officially has lost all semantic meaning beyond look out for the "s"!
Yep. I call shenanigans. I doubt there's a commercially available AA battery that'll reliably keep its charge for 10 years, much less power something.
My alarm clock (seven-segment hh:mm:ss display, radio controlled) is running on one single
AA battery since at least late 2004, so it is going into its 8th+ year now. It is a completely standard
1.5V AA cell made by TDK (or at least sold under their name).
No, I haven't checked the battery for radiation yet. Yes, it is beginning to scare me a bit.
Bad news for GCHQ, I have no desire to work for the Government. I don't care what the renumeration package is.
Not even if they offer free full IPv6 renumbering for life?
Actually, Space Station astronauts photographed the event as it unfolded.
The "video" is a time lapse animation made from those stills, and a
good bit faster than real time.
Would it be possible then that an underwater nuclear explosion would be less devastating than an overground one due to absorption of energy by the water?
If you are above the water surface (and outside the immediate blast zone of the
big splash), this is certainly the case. There's also less fallout.
If you are below the water surface - e.g. in a submarine - it's an unhealthy place
to be: the pressure wave propagates much better in water than in air and will just
crush the hull in the broader vicinity of the explosion.
This again is different from a tsunami: a sub in deep water doesn't really care about
a tsunami rolling by, and might not even notice it at all.
I wasn't quite being as literal with the touch of a button statement, just the idea that it can be used is terrifying enough. You could probably drop it in the sea and create a tidal wave so big it would cover a medium sized country. It wouldn't just reduce navies near by, it would eradicate anything near the entire ocean.
You seriously underestimate what is needed to cause a decent tidal wave.
If used as a "wave generator", this bomb could cause wet feet in a single harbour,
and only if detonated close enough (under 20km, lets say. It probably even needs
to be closer than that, I haven't done the math) but that's pretty much all.
Earthquakes triggering big tsunamis are vastly more powerful, and also work differently:
Big submarine earthquakes permanently displace huge amounts of water - in the case
of the Japan tsunami, over 100 cubic kilometers.
A big bomb just causes a pressure wave, and no permantent water displacement:
There is no hole in the ocean afterwards.
I don't believe there is any way to shut down GPS at the source other than globally.
Yes there is. That's one of the reasons why "selective availability" (i.e. intentionl signal degradation)
on the civilian GPS signal has been switched off: GPS is now split into "GPS regions", which can be
degraded or even disabled individually. It's a simple timing thing - the satellites know where they are
after all.
Of course, the implementation is still tricky - but I guess that's why SA was used instead of this
in the first place: it took a while to figure it out.
I knew someone would object and bring up gtkpod/libgpod. I had a paragraph
about that in my reply's first draft, but replaced all of it with the word "reliable".
Yes, libgpod works well on the devices it supports.
It took ages (close to two years) for gtkpod to support the 5th gen nano, for example.
The 6th gen nano is still unsupported today, nearly 14 months after its launch.
So, go on, tell people they have to wait for over a year if they want to use their shiny
new iThing without iTunes. Good luck.
I've never used itunes but that sounds terrible. Why would anyone use itunes if that is the case?
Because it's the only reliable way to interface with all those iThings people apparently want to have.
"LibreOffice Online"... seriously? LOO?
I assume it will be accessed via a series of pipes?
GCC 4.5 (and even 4.6 with a special repo) has been there since 10.10...
"gcc -v" in a fully updated install of 10.10 two minutes ago:
gcc version 4.4.5 (Ubuntu/Linaro 4.4.4-14ubuntu5)
Why did the Go-Pro shield melt on the way up? Was it the heat conducted through the tube from the burning engines or something?
Air friction. That thing went nearly 1 km/s in still quite dense air.
If you look at the details, you can see the shield melted from the outside in.
It was also meant to be made out of machined metal, but they apparently had
to go with the 3D printed plastic prototype due to time constraints.
You mean something like "Global Intellectual* War"?
*: needed to drop the "property" for pun's sake. Sue me.
1) Demand is growing.
It really isn't.
I'm a bit taken aback that they've allowed a non-European country to join, but the United States is still relegated to "Observer status" (E.g. 'Source of $$$, but not allowed to participate or become a full member')
Then you'll be glad to know that the US are not a "source of $$$" for CERN:
CERN budget by states [2009 budget, seems to be the newest available].
Yes, goods and services (designing and building stuff) did and do come from the US too, but those
happen with full scientific involvement of several big American universities and research facilities.
I have no idea where you got the idea from that the US don't participate in CERN research,
or are even somehow forbidden to do so.
Apparently something like a WiFi card can generate a strong enough signal that blows the amplifiers of the telescopes.
LOL check out the inverse square law and get back to me... If that were the case, aircraft over new york state would utterly vaporize them.
Well, not "blow" in the sense of destroying the amplifier, but in the sense of
completely drowning the signals they are looking for.
Radio astronomy looks for signals in the Picowatt range, so the some-100-mW
Wifi signals will still be an order of magnitude stronger more than 100km away
(not considering topography etc).
Airplane radios are a big annoyance too, but fortunately don't emit much in the
astronomically interesting GHz range - Wifi does.
Yep - that's the problem with nuclear waste material: Putting them into different
molecules doesn't make the atoms less radioactive. Only time (or, in some very
specific cases, neutron irradiation) will do that.
What this does is turning radioactive waste into living radioactive waste...
The Summary says "Of his Generation" - neither Rockefeller or Anton Fugger are really in the same generation as Mr. Jobs.
"...and quite possibly of all time."
Anton Fugger (and even more his uncle, Jakob) pretty much controlled the fate of
several kingdoms. Today's Murdochs pale in comparison.
And let's not forget Marcus Licinius Crassus, who personally owned a big
part of the Roman Empire at his peak. Seriously.
Nope. Lots of countries tie their exchange rate to the dollar.
That used to be true at the time of Bretton Woods, which failed during the 1970s. Few still do.
(all the green ones peg to USD)
If you exclude the petrol exporting states on the Arabian Peninsula (their main and often close to only
income is in USD, so they don't have too much of a choice), you are left with huge economic powers
like Zimbabwe, Cuba, Eritrea, Venezuela, and a couple of tiny islands and Central American states.
The video mostly consists of annoying closeups of tiny parts of the contraption.
For a few seconds of a full view on the quite impressive thing, jump to about 4:30.
Certificates are good for encryption. That's it. With the insane amount of "trusted CAs"
that come pre-trusted with every browser nowadays, that's all that is possible.
Hoping to achieve anything beyond that is naive.
From a very insightful talk about the topic:
SSL certificates provide honesty-box security
Use a $495 Verisign certificate
– People will come to your site
Use a $9.95 budget CA certificate
– People will come to your site
Use a $0 self-signed certificate
– People will come to your site
Use an expired or invalid certificate
– People will come to your site
Use no certificate at all, just a disclaimer saying that you’re secure
– People will come to your site