SSL and internet security news

squid

Auto Added by WPeMatico

Friday Squid Blogging: Robot Squid Propulsion

Interesting research:

The squid robot is powered primarily by compressed air, which it stores in a cylinder in its nose (do squids have noses?). The fins and arms are controlled by pneumatic actuators. When the robot wants to move through the water, it opens a value to release a modest amount of compressed air; releasing the air all at once generates enough thrust to fire the robot squid completely out of the water.

The jumping that you see at the end of the video is preliminary work; we’re told that the robot squid can travel between 10 and 20 meters by jumping, whereas using its jet underwater will take it just 10 meters. At the moment, the squid can only fire its jet once, but the researchers plan to replace the compressed air with something a bit denser, like liquid CO2, which will allow for extended operation and multiple jumps. There’s also plenty of work to do with using the fins for dynamic control, which the researchers say will “reveal the superiority of the natural flying squid movement.”

I can’t find the paper online.

As usual, you can also use this squid post to talk about the security stories in the news that I haven’t covered.

Read my blog posting guidelines here.

Powered by WPeMatico

Friday Squid Blogging: When the Octopus and Squid Lost Their Shells

Cephalopod ancestors once had shells. When did they lose them?

With the molecular clock technique, which allowed him to use DNA to map out the evolutionary history of the cephalopods, he found that today’s cuttlefish, squids and octopuses began to appear 160 to 100 million years ago, during the so-called Mesozoic Marine Revolution.

During the revolution, underwater life underwent a rapid change, including a burst in fish diversity. Some predators became better suited for crushing shellfish, while some smaller fish became faster and more agile.

“There’s a continual arms race between the prey and the predators,” said Mr. Tanner. “The shells are getting smaller, and the squids are getting faster.”

The evolutionary pressures favored being nimble over being armored, and cephalopods started to lose their shells, according to Mr. Tanner. The adaptation allowed them to outcompete their shelled relatives for fast food, and they were able to better evade predators. They were also able to keep up with competitors seeking the same prey.

As usual, you can also use this squid post to talk about the security stories in the news that I haven’t covered.

Read my blog posting guidelines here.

Powered by WPeMatico

Friday Squid Blogging: Fantastic Video of a Juvenile Giant Squid

It’s amazing:

Then, about 20 hours into the recording from the Medusa’s fifth deployment, Dr. Robinson saw the sharp points of tentacles sneaking into the camera’s view. “My heart felt like exploding,” he said on Thursday, over a shaky phone connection from the ship’s bridge.

At first, the animal stayed on the edge of the screen, suggesting that a squid was stalking the LED bait, pacing alongside it.

And then, through the drifting marine snow, the entire creature emerged from the center of the dark screen: a long, undulating animal that suddenly opened into a mass of twisting arms and tentacles. Two reached out and made a grab for the lure.

For a long moment, the squid seemed to explore the strange non-jellyfish in puzzlement. And then it was gone, shooting back into the dark.

As usual, you can also use this squid post to talk about the security stories in the news that I haven’t covered.

Read my blog posting guidelines here.

Powered by WPeMatico