To me it sounds like what I've heard called an 'ACK Storm'.
It seems to occur when a switch somewhere gets it's MAC table corrupted somehow and starts squirting rubbish onto the network.
I accidentally caused one of these at my uni, by changing the MAC address of my netcard, it brought down the whole network for hours, the switch was continuously broadcasting the last packet it saw.
We've had proof by example, intimidation, vigorous handwaving, cumbersome notation, exhaustion, obfuscation, picture, vehement assertion and appeal to intuition.
There was a noise from the next office like toast popping, and Steve the
senior consultant yelled in terror. "Has your toast popped?" I shouted?
"Someone just tried to shoot me!" he replied. I walked into his office to
see the occupants crowded around an open CD-ROM drive with the shattered
remains of about half a CD in it. As we watched, the drive attempted to
shut itself, made it about half way, and then opened again. It repeated
this process about twice a minute, shutting a little more completely each
time. Eventually it fully closed itself, though it is still opening and
shutting regularly. We didn't find the other half of the CD (at least
some of it is presumably still in the drive and is what was preventing it from closing) but we did find the front flap of the CD-ROM drive under
Steve's desk, where it had fallen having been blown clear across the room,
past his head, and colliding with his notice-board.
Some points:
It was a Samsung 40-speed drive. You might want to avoid them.
It was a Hewlett-Packard CD-R that had come free with a USB portable CD
burner. You might want to avoid them.
It was quite warm, though there was no direct sunlight hitting the
drive. You might want to avoid that anyway.
I hope they realise this is a breach of their EULA:)
now, where's that VNC brute-forcer...;)
It looks like you are writing a slashdot news item
on
April Fools Wrap Up
·
· Score: 4, Funny
Would you like me to: * Fuck the spelling up * Post this multiple times as different people * Add a stupid opinionated comment at the end * Forget to close a HTML tag
I'd heard of it. I'd also heard this general solution proposed on my undergrad course, it's just noone could be bothered to mess around with all the damn vectors until now.
'Buckytubes' (I hate that name) are within an order of magnitude of the strength required.
The suggested building method is to put a bulky object (eg captured asteroid) in geosync orbit and lower the cable down, moving the 'roid back up slowly to ensure the centre of mass remains geosync.
How thick do you think this thing'll be? I think that it *not* being visable is going to be a larger problem. ISTR that the core will only be of the order of a few centimetres diameter, you'd not see it at 100m, hardly a problem across "much of the Earth's surface"
Voltage potential? You think the Earth circles the Sun because we're +ve and it's -ve? The only real issue would be a conductor moving through the Earth's magnetic field.
You should call yourself PhysicsTroll, not PhysicsGenius...
only 20dB of gain, slightly more than half an EDFA, and far less than a Raman.
The benefit of the quantum dots is that each dot has a gaussian gain profile, so if you have a huge number of them you can get a (nominally) flat gain profile, compared to the normal sqrt curve.
Current prototypes don't have enough bandwidth for the whole fibre, but they are far more efficient and cheaper than Raman amps.
The theoretical maximum (for silica) I've heard quoted is 40Tbit/s, but I'm sure you could squeeze a bit more out. The current limit is the gain spectrum of the Erbium Doped Fibre amplifiers that make sure a signal can travel long distances, these have a (relatively) narrow gain band. Semiconductor Optical Amplifiers (think of them as diode lasers, without the mirrors) could have a wider spectrum than the optical fibre! Lots of problems with them currently though.
I can only think that you haven't used in on unix, where you can create as many 'desktops' as you want. On Windows it just copies the current desktop to a virtual framebuffer, but under linux is creates an X display and lets applications draw into its framebuffer, which it then sends off over its RFB protocol.
Compared to Terminal Server under win32 it's slightly slower and harder to use, but there are patches etc which improve the compression.
for almost everything. It is designed as a security testing tool, but I found its "download and install into ram" abilities so useful I had it set up to ghost machines, repair stuff, set up an emergency mail server...
As well as stress test the IDS we were writing. Brilliant.
Slashdot Mirror
To me it sounds like what I've heard called an 'ACK Storm'.
;)
It seems to occur when a switch somewhere gets it's MAC table corrupted somehow and starts squirting rubbish onto the network.
I accidentally caused one of these at my uni, by changing the MAC address of my netcard, it brought down the whole network for hours, the switch was continuously broadcasting the last packet it saw.
They never found it was me though
In bright light the optical limits of the eye are already the bottleneck.
;)
As both the retina and lens system both evolved more or less simulatiously this is only to be expected.
The point spread function primary and secondary peaks map onto two photoreceptors.
In the dark the iris is larger, so the psf is larger.
To get better vision would require adaptive optics (like used in telescopes) and we're not even sure if the brain could handle it
We've had proof by example, intimidation, vigorous handwaving, cumbersome notation, exhaustion, obfuscation, picture, vehement assertion and appeal to intuition.
Now we have 'proof by reference to google'
I generally use wood, light, strong, cheap, but labour intensive to shape. And flammable :)
There was a noise from the next office like toast popping, and Steve the senior consultant yelled in terror. "Has your toast popped?" I shouted? "Someone just tried to shoot me!" he replied. I walked into his office to see the occupants crowded around an open CD-ROM drive with the shattered remains of about half a CD in it. As we watched, the drive attempted to shut itself, made it about half way, and then opened again. It repeated this process about twice a minute, shutting a little more completely each time. Eventually it fully closed itself, though it is still opening and shutting regularly. We didn't find the other half of the CD (at least some of it is presumably still in the drive and is what was preventing it from closing) but we did find the front flap of the CD-ROM drive under Steve's desk, where it had fallen having been blown clear across the room, past his head, and colliding with his notice-board.
Some points:That's a file containing the cron process id.
:)
Not having a mac (yet) I can't tell you which file to edit, but it isn't that one
It's terrible. This fat tongued posh kid pretending to be cockney.
More Info
5900/tcp open vnc
:)
;)
I hope they realise this is a breach of their EULA
now, where's that VNC brute-forcer...
Would you like me to:
* Fuck the spelling up
* Post this multiple times as different people
* Add a stupid opinionated comment at the end
* Forget to close a HTML tag
at network hearts.
Oh Kingdom.
I've been coding X *and* win32 in one application today, it has turned my brain to Emmenthal
I'd heard of it. I'd also heard this general solution proposed on my undergrad course, it's just noone could be bothered to mess around with all the damn vectors until now.
'Buckytubes' (I hate that name) are within an order of magnitude of the strength required.
The suggested building method is to put a bulky object (eg captured asteroid) in geosync orbit and lower the cable down, moving the 'roid back up slowly to ensure the centre of mass remains geosync.
How thick do you think this thing'll be? I think that it *not* being visable is going to be a larger problem. ISTR that the core will only be of the order of a few centimetres diameter, you'd not see it at 100m, hardly a problem across "much of the Earth's surface"
Voltage potential? You think the Earth circles the Sun because we're +ve and it's -ve? The only real issue would be a conductor moving through the Earth's magnetic field.
You should call yourself PhysicsTroll, not PhysicsGenius...
only 20dB of gain, slightly more than half an EDFA, and far less than a Raman.
The benefit of the quantum dots is that each dot has a gaussian gain profile, so if you have a huge number of them you can get a (nominally) flat gain profile, compared to the normal sqrt curve.
Current prototypes don't have enough bandwidth for the whole fibre, but they are far more efficient and cheaper than Raman amps.
There are diode lasers with ~33THz bandwidth currently available (generally used in picosecond pulse generation)
These use multiple quantum dots to engineer the gain spectrum.
That's cheating dammit!
Oh crap. Erm... Hitler used emacs?
** Use of Hitler in Arguement Detected: AUTOMATIC LOSS **
Ok, I lose.
The theoretical maximum (for silica) I've heard quoted is 40Tbit/s, but I'm sure you could squeeze a bit more out. The current limit is the gain spectrum of the Erbium Doped Fibre amplifiers that make sure a signal can travel long distances, these have a (relatively) narrow gain band. Semiconductor Optical Amplifiers (think of them as diode lasers, without the mirrors) could have a wider spectrum than the optical fibre! Lots of problems with them currently though.
I think I'll wait for the quantum dot lasers to catch up.
Caveat: I personally use psftp/pscp from the PuTTY ssh toolkit, sftp/scp under Linux or Cygwin.
;)
CuteFTP Pro claims support for SFTP and FTP over SSL.
Some of my users use it, I never have
Sorry to pick on you; everyone else seems to be doing this these days, but The X Window System is NOT 'X WINDOWS'
From the manpage:
The X Consortium requests that the following names be used when referring to this software:
X
X Window System
X Version 11
X Window System, Version 11
X11
X Window System is a trademark of X Consortium, Inc.
Whats wrong with VNC?
;)
I can only think that you haven't used in on unix, where you can create as many 'desktops' as you want. On Windows it just copies the current desktop to a virtual framebuffer, but under linux is creates an X display and lets applications draw into its framebuffer, which it then sends off over its RFB protocol.
Compared to Terminal Server under win32 it's slightly slower and harder to use, but there are patches etc which improve the compression.
I think of it as 'screen' for X
Now that is a good point. I reckon, given a year or so, I could develop an entirely optical CD copier.
:P
I've already made my own CD autofocuser
Try here: The Linux Hardware Database
:)
SuSE also has a hardware compatibility list, and there are links from the Debian install guide.
As always, you can always use Google
19k lines? bloated!
yarn@pendragon:/tmp/wm2-4$
[..snip..]
5439 total
for almost everything. It is designed as a security testing tool, but I found its "download and install into ram" abilities so useful I had it set up to ghost machines, repair stuff, set up an emergency mail server...
As well as stress test the IDS we were writing. Brilliant.
I do this by putting everything on my webpage and letting google sort it out :)