Slashdot Mirror
A New Algorithm Could Protect Ships From 'Rogue Waves' (cio.com)
itwbennett writes: MIT researchers have developed a tool they say can predict so-called rogue waves, giant waves that seem to appear out of nowhere and can cause devastation to ships unlucky enough to be struck by them. The researchers found that certain wave groups end up 'focusing' or exchanging energy in a way that eventually leads to a rogue wave. The tool they developed uses an algorithm that sifts through data from surrounding waves and computes a probability that a particular wave group will turn into a rogue wave within the next few minutes.
Because its done on water? wave analysis has exsisted in the audio industry for a long time and exactly the same principles must apply
They want us to all die miserable.
Ugh, slashdot *still* can't just make a url linkable? No wonder they keep selling it. Next it'll probably integrate with AOL.
the front fell off
will never allow this to be used since they are pro-human suffering.
Unless there is a way to make stupid amounts of money at the cost of lives like making the technology so expensive that only those with super yachts can afford it and not requiring it on passenger boats
And killing someone scales because it makes a lot of people miserable. It's the best way they have of making sure mothers and children end up on welfare.
They want everyone on welfare so the government has more control.
And killing someone scales because it makes a lot of people miserable. It's the best way they have of making sure mothers and children end up on welfare.
Actually more profitable to kill mothers and children so the republicans want an end to women and children first.
Once the women are gone the men can concentrate on making the republicans more money.
This. They hate the people so they ever allow science to protect the people.
Ever allow? No, dumbazz. They never allow.
will never allow this to be used since they are pro-human suffering.
It's not that they don't allow it. It's that they make it so expensive that normal people can't afford it.
Would this make ocean-going ground-effect aircraft (a la Ekranoplans) viable? It could create a third tier of shipping in between ship and air. Assuming, of course, that the necessary data can be gathered while traveling across the waves at several hundred mph.
i wish there was technology to protect against rogue youtube links that are dumb and posted by dumb people who complained about getting their dumb link out twice when if they had done it 0 times it would be less dumb.
morons.
Beware of well wishers that do not know anyone on the boat as it leaves.
This causes great confusion. Legitimate wavers are overlooked as passengers divert their gaze to the rogue and miss a last chance farewell.
That part is rubbish. The problem is not rogue 8 meter waves swelling out of a sea with 1 meter waves.
Big ocean going vessels can easily deal with 8 meter waves.
The problem is 30+ meter waves swelling out of a storm with 10 meter waves.
The ship can deal with any storm the ocean can throw at it.
But not with a 30+ meter wave.
So the sentence should have been:
> They [rogue waves] wreck havoc in severe storms by turning 10 meter waves into 30 meter ones; a height no ship is designed to deal with.
On top of that the steep curve that rogue waves follow adds to the problem because the ship cannot rude such a steep slope.
Normal storm waves have a gentle slope which the ship can 'ride' on top of.
The "next few minutes" is basically just enough time to give the "abandon ship" order. To be useful the algorithm has to predict the rogue wave far enough in advance to let the ship turn and steam clear of the wave group. In a storm, that's probably 20-30 minutes which I don't see happening any time soon.
Then, if they're predictable they can't be called rogue waves.
Wreck? Rude?
Wreak. Ride.
Aside from your atrocious spelling, your facts are false and misleading. Not all ships are large enough to withstand 10 meter waves. No ship can "deal with any storm the ocean can throw at it". The size of the wave makes a big difference, regardless of slope. If a large wave crests and comes down on you you're fucked. It a large wave hits you at a bad angle, you're fucked.
Ok, so i like the research, but the theory that it could be used anytime soon for some type of rouge wave detection or prevention seems far fetched. I don't see it being very easy to map out wave activity in a large enough area in all the varying conditions you come across at sea AND produce any useful lead time in warning no less what does a warning do. Boats maneuver like.. boats. When you're out in the vast fluid dynamics of the ocean there isn't much you're going to do to get away from a wave or block the force of it's impact. Perhaps we can come up with areas and conditions where rouge waves can be said to be more common, but real time prediction or prevention isn't happening anytime soon and why would it, rouge waves are not any kind of pressing issue. Boats are just not made to survive large waves due to their large broadsides. If you want to make a boat that is protected from a rouge wave then engineer more stable boats. What else will you do tether a giant mesh of sensor to the boat? Sounds like people getting paid for science that will never see the light of day.
Drone measures "rogue wave" -> Generates radio wave -> warns ship.
Take a look at the graph for time-domain signals in OFDM and rogue wave plots. They look almost identical. Maybe some collaboration on these high-dynamic-range events could help.
Anyways, projection analysis has not been the only way induct events. There's a lot of data to create such expectation, but nature is nature my angels.
I have a vague recollection of some mathematical link being postulated between rogue waves and some aspects of quantum mechanics.
Anyone know what that might have been?
systemd is Roko's Basilisk.
Because they built this beastie
https://en.wikipedia.org/wiki/...
A short warning of five minutes or so would do very little to moderate the crushing damage done by rogue waves. No matter what position a ship is in a 150 ft. high wave is going to do major damage. It is not like one could run from a rogue wave as ships are slow compared to waves. Smaller vessels have no hope at all. The recent proof of gravity waves got me to wondering if a rogue gravity wave could ever take place. Imagine what that might entail.
I know everyone has seen the example where two waves meet up and their amplitudes add up, creating a huge peak. While the arithmetic of that is correct, the actual dynamic behavior of waves is a lot more complex. What you see as a wave is only a partial instantaneous manifestation of an energy pulse in the water. Waves do not propagate in isolation like you learned in high school. As with coupled pendulums, there is energy transference between individual waves.
So instead of taking the arithmetic approach - measuring every wave, and trying to predict when a rogue wave will happen - they're measuring wave train profiles and analyzing how they'll combine and interact. The calculations are a lot more complex, but you need a lot fewer measurements and calculations.
The captain will want to know about this
https://www.youtube.com/watch?...
Go well
This is the part that I don't get: How is this algorithm supposed to "Protect" the ship. Sounds like only thing it can do is predict that one will be forming.
If so, how can a ship possibly survive such a gigantic wave even if it knows it is coming?
There are several candidates for rogue wave generation. In most of them (such as multi-wave focus and in-phase combination of several wave components of different frequencies) the rogue wave is very limited, especially in duration. (A possible exception is a non-linear long-duration soliton, such as the sech() envelope solution for water waves.)
In particular (at least while the amplitude is low enough that the waves' behavior is approximately linear), even if all the wave energy is going in the same direction, each sinusoidial component of the wave propagates at a different speed, proportional to the square root of its length. If they add up to something like an impulse at one point, a bit farther along their travel (and also a bit farther back in it) they aren't in phase any more. The nasty spike is gone. Things quickly get back to the sort of behavior you usually see.
If you know long enough in advance (maybe a minute or two) that one of these is going to exist in its full glory where and when you will be on your current course and speed, you can just alter them: Rudder hard over and cut the engine (or let out the sail), for starters. Be in a different place where/when the wave will not have formed, will have dissipated, or will at least be lower and more diffuse - and pointed in a direction to handle what you do encounter.
Would this algorithm even predict what direction it is coming from?
Almost certainly - if it involves processing data from more than one spatially-separated sensor, or even a single sensor on a moving platform.
Surely we have slashdoters that have great knowledge of seafaring.
Or some knowledge of both seafaring and surface wave mechanics.
What would be the best course that a ship can take to survive such a sudden mountain of water?
Be somewhere else. B-)
Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way