Users that often use this tag:
"The models we discuss belong to the class of two-variable systems with one delay for which appropriate delay stabilizes an unstable steady state. We formulate a theorem and prove that stabilization takes place in our case. We conclude that considerable (meaning large enough, but not too large) values of time delay involved in the model can stabilize love affairs dynamics
." [more inside]
posted by bluefly
on Jan 16, 2013 -
Air traffic in
much of northern Europe
halted – due to ash from a volcanic eruption under the Eyjafjallajokull glacier
in Iceland. The volcano under the glacier erupted for the first time in 200 years last month and whilst Iceland is renowned for its volcanic and geologic activity the sheer ferocity of the latest eruption (thought to be 20 times more powerful than the initial eruption on the 20th March) and prevailing wind conditions have culminated in the current traffic chaos
shows the current impact on the skies. Whilst the particles will disperse at high altitude and pose no threat to those on the ground, the volcanic ash
is very dangerous
to aircraft . Not only is there the problem of it clouding pilot vision but the ash can cause engine malfunction and damage the delicate airframe skin. One silver lining in all this is the anticipated glorious red sunset that should follow.
posted by numberstation
on Apr 15, 2010 -
Operation enduring chaos: ... the death squads are the result of US policy.
At the beginning of last year, with no end to the Sunni insurgency in sight, the Pentagon was reported to have decided to train Shia and Kurdish fighters to carry out "irregular missions". ... From killing everyone named Omar (a Sunni name) who passes thru the wrong checkpoint, to simply marking businesses (and their owners) they want gone with red crosses, how various squads and militias and "armies" and "brigades" are running Iraq.
posted by amberglow
on Oct 29, 2006 -
of two pendulum clocks was discovered in 1665 by Huygens. Two pendulum clocks mounted on the same wall always fell exactly out of phase with each other no matter what the starting conditions. Regardless of the initial conditions the system always ended up the same. In stark contrast, a chaotic
system is extremely sensitive
to initial conditions. How can these two seemingly seperate things be tied together? The synchronization of chaos
. When two chaotic systems are synchronized together, information
can be shared between them. It immediatly brings to mind applications for encryption
, but it is still far away from everyday use
posted by ozomatli
on Dec 14, 2005 -
Northeast could face energy chaos, MIT expert warns
"The existing transmission grids were designed to serve regional needs. Power transfers from one grid to another were meant for emergencies only. Computer simulations performed at MIT show that heavy use of grid interconnections to tap cheaper power sources can have unintended effects. Trades between two regional grids can adversely affect operations in a third regional grid, potentially leading to frequency and voltage disturbances." But don't panic, MIT's Competitive Power Systems Group (funded "from a variety of industrial sources") has a solution. FUD or useful idea?
posted by Allen Varney
on Sep 19, 2001 -
Sippey encourages you 'to inject chaos and anarchy into the post button by hijacking the identities and namesakes of your favorite web "icons."'
Who do you want to be today?
posted by peterme
on Mar 30, 2001 -