Sunday, November 8, 2015

Strandbeests : life-like sculptures that stroll on the beach.

The March of the Strandbeests :
Theo Jansen’s wind-powered sculpture.

From NewYorker by Ian Frazier

If you’re like many people, you know about Theo Jansen already.
You may not know you know, but on reflection perhaps you realize you do.
You’ve come across his kinetic sculptures in videos online, or a kid has shown the videos to you, or you’ve been with friends who were watching them.
Once seen, they are remembered.
Theo Jansen is a Dutch artist who lives in Delft, near the North Sea.
He could almost be a single-name artist, because everybody calls him Theo, pronounced “Tayo.”
For the past twenty-one years, Theo has devoted himself to constructing animals that can walk on the beach powered only by the wind.

His name for his animals is Strandbeests, which means “beach animals” in Dutch.
The first time I saw them, I was in a restaurant in Manhattan having lunch with friends and somebody brought out a laptop and we watched and re-watched them.
The creatures were many-legged, they seemed as at home on a beach as sandpipers or crabs, they high-stepped with the vivacity of colts, they fit perfectly next to the waves and sky.
Some had batwing-like sails, one was made of plywood, but basically they were accumulations of stiff plastic tubes.
To see inanimate stuff come to life that way was wild, shiver-inducing—like seeing a haystack do the Macarena.

At this lunch, people said how great it would be if the Strandbeests came to New York.
And they might, because Robert Kloos, the director for Visual Arts, Architecture, and Design at the Consulate General of the Netherlands, has been working with other fans of Theo’s to find a venue and funding for a show in the city in 2013, and has described such a show as “a dream come true.”
The photographer Lena Herzog, one of Theo’s fans, who was at the lunch, said the show would draw a big audience, because a commercial for BMW cars featuring Theo and his Strandbeests had already received more than four million hits on YouTube.
Then she told me that Theo would be bringing out some new Strandbeests for a trial run, or walk, on a beach near Delft very soon, that she would be going over to photograph them, and that I should come along.
I thought this was a good idea.
Before the Strandbeests appeared here, I would see them in their native environment.

So in mid-May I went, and Theo himself met me at the airport in Amsterdam, holding a hand-lettered sign with my name on it at the customs exit.
(Lena would be joining us in a day or two.)
He greeted me warmly and we wandered off.
At first, he couldn’t find his white Volvo in the airport parking garage, and I set down my suitcase while he listened for his dog.
Theo has a small, wool-colored dog of a French Madagascar breed who goes almost everywhere with him and is named Murphy.
In a minute, he picked up Murphy’s bark and we homed in on it.
The dog barked more encouragingly the closer we got to the car. 

A drive of about forty minutes brought us to Theo’s outdoor workshop, on a man-made hill in the suburb of Ypenburg, near Delft.
The hill is on land that used to be a military airport, and serves as a sound barrier between a highway on one side and apartment houses on the other.
A sort of no man’s zone, it remains mostly unoccupied, so local officials let Theo use it to assemble and store his Strandbeests.
The yellow PVC tubing the animals are made of bleaches to bone white in the sun; wrecks of defunct Strandbeests lay in the hilltop grass like heaps of old bones.
A few newer, ready-to-travel models stood in a line next to the storage container where Theo keeps thirty miles of plastic tubes for future use.
Others of his more recent animals were absent, returning from an exhibition in Japan.

Theo is sixty-three.
His collar-length white hair frames his head like two S shapes facing each other, his eyes are china blue, and he has a wide, guileless smile.
That he is handsome contributes to the success of his videos.
When he is working, and at other times, he wears a well-tailored purple corduroy jacket narrow at the waist and flared below.
His jacket, unrestrained hair, long legs, and antic energy often give him the look of a storybook sorcerer.
He is somewhat deaf—the result, he says, of spending so much of his forties hanging next to the loud engines of the para-planes he loved to fly in many places, but mainly over the North Sea coastline. His country’s famous landscape, intensely cultivated and flat as water, floors a vast column of cloud-filled sky, and the image of a younger Theo careening around up there in his sketchy flying machines somehow still is part of him.


Numerous specimen of the Strandbeest evolution on music of Khachaturian's Spartacus.
It open the archives of fossils.

Theo Jansen's work since 1990.
He tries to make new forms of live on beaches.
His animals get their energy from the wind so they don't have to eat.
In the future he wants to put out in herds.

In fact, Theo’s first important work was a sky piece.
In 1980, he made a flying saucer from plastic sheeting on a light frame.
The saucer was lens-shaped, about fifteen feet across, and carried beneath it a plastic paint bucket that emitted outer-space-like beeps.
One afternoon, he and some friends filled the flying saucer with helium and launched it over Delft.
Immediately, a local sensation resembling the “War of the Worlds” episode (if less frantic and more civilized) ensued.
The object he had made looked and behaved as a flying saucer is expected to.
It hovered, rose, darted (with the wind), went in and out of clouds.
The police gave chase, people ran from their houses to look up, authorities reported that the object was moving at great speeds, it was said to be as big as a nuclear reactor, etc.—all satisfying developments, from Theo’s point of view.
After exciting the population and inscribing in thousands of memories its flight through the spacious skies of Delft, the saucer vanished in the direction of Belgium.
When the author of the event was revealed, he got a lot of press.
The experience ruined him, he says, for the landscape paintings he had been doing before.

I was thinking it must be strange for a landscape painter to live in a landscape that was fixed in oil and ratified permanently by the great Dutch painters of the seventeenth century.
From Theo’s man-made hilltop, for example, I could see several familiar-looking towers, including the fifteenth-century church steeple that appears in Vermeer’s “View of Delft” (1660).
I could also see a small flock of storks flapping to the horizon, and a canal lined with possibly invasive reeds, and blunt-faced trucks on the highway, and red rooftops, and rows of thin, dark trees like sawteeth.
The only other structure as tall as the old steeple or the towers was the two poles holding up the golden arches of a McDonald’s restaurant.
With binoculars, I might have picked out the crows and ravens that throng around the sign and descend on the garbage cans in the McDonald’s parking lot.
My hotel was near the McDonald’s, it turned out, and I observed the birds close up later.

Theo showed me around his small on-site workshop.
It was filled with tools like vises, saws, clamps, and heat guns for softening the plastic tubes.
On perforated wallboards, tools hung neatly inside their black magic-marker outlines.
From a workbench Theo picked up a piece of three-quarter-inch PVC tube about two feet long.
He said this was the basic element in the Strandbeests’ construction, like protein in living things.
“I have known about these tubes all my life,” he told me.
(He speaks good English.)
“Building codes in Holland require that electrical wiring in buildings go through conduit tubes like these.
There are millions of miles of these tubes in Holland.
You see they are a cheese yellow when they are new—a good color for Holland.
The tubes’ brand name used to be Polyvolt, now it is Pipelife.
When we were little, we used to do this with them.”
He took a student notebook, tore out a sheet of graph paper, rolled it into a tight cone, wet the point of the cone with his tongue, tore off the base of the cone so it fit snugly into the tube, raised the tube to his lips, blew, and sent the paper dart smack into the wall, fifteen feet away.
He is the unusual kind of adult who can do something he used to do when he was nine and not have it seem at all out of place.
“I believe it is now illegal for children in Dutch schools to have these tubes,” he said.

Theo grew up in Scheveningen, a small port city just north of Delft.
His father, a farmer, moved the family there after losing his farm during the Second World War.
In Scheveningen, the family supported itself mainly by taking in German tourists who wanted to vacation at the beach, just across the street from the Jansens’ apartment.
Theo remembers his mother waking him and his six brothers and four sisters early in the morning during the summers so they could deflate the air mattresses they had slept on and get them out of the living room before the guests occupying the family’s beds woke up.
He went to primary and secondary schools in Scheveningen, studied physics at the Delft University of Technology, and left in 1974 without a degree.

After university, he became an artist and did other things, like work in a medical laboratory.
His landscape paintings, which he spiced up by putting in women wearing only underwear, had some success—“They were vulgar paintings, but they sold”—and after the flying-saucer episode ended them he invented a light-sensitive automatic painting gun that he demonstrated at local fairs.
The Delft city government gave him a subsidized studio in a downtown building converted for artists, which he still uses.
In it he built a large pair of feathered wings and propelled himself through the air by means of them while suspended on cables.
He had several shows of his work in Dutch museums and galleries, marking one opening with the launch of a twenty-foot-long rocket he’d made.


In 1990, in a column he was then writing for De Volkskrant, a national newspaper, he warned that rising sea levels might re-flood Holland and reduce its size to what it had been in medieval times.
As a solution, he proposed to build animals that would toss sand in the air so that it would land on and augment the seaside dunes.
What he envisioned were self-propelled creatures that would restore the balance between water and land, the way beavers do in Dutch marshes.
He promised to devote a year to the project, and it has occupied him exclusively ever since.
While fooling around with plastic conduit tubes at a building-supply store, he realized that they were the perfect raw material.
More even than the Strandbeests, the possibilities he saw for the tubes changed his life, he says.

He divides his different generations of Strandbeests into time periods like geologic eras.
In the earliest period, he was taping the tubes together. He calls this the Gluton Period (1990-91).
The first tube-and-tape creation, Animaris Vulgaris, could not stand up, only lie on its back and move its legs.
In the next period, the Chorda Epoch (1991-93), he began to connect the tubes with nylon zip strips, a great improvement on tape, and he built Animaris Currens Vulgaris, the first animal that could stand and walk.
To figure out the best way to make the legs, he ran a genetic algorithm for leg design on his computer, and it suggested a foot that pivoted at the ankle and a double-jointed leg that allowed the foot to stay on the ground as long as possible before lifting for the next step.
Basic Strandbeest design now uses multiple pairs of these legs set on a central crankshaft, which produces a galloping-herd effect.

Later refinements added sails, a shovel arm for tossing up sand, pneumatic power with fanlike blades pumping air into plastic bottles for pressurized storage, “nerve cells,” which can detect when the animal is in shallow water, and directional cells, which count steps and cause the animal to back up when it is about to go into the sea.
As of now, none of these technologies work very reliably.
Theo says he envies the original Creator’s supply of countless millions of years for animal evolution, and is sure he could make perfect beach animals, given that much time.

“The walking Strandbeest is a body snatcher,” he told me, while disassembling one for transport.
“It charms people and then uses them so they can’t do anything else but follow, and I am the worst victim, you could say.
All the time I think about them.
Always I have a new plan, but then it is corrected by the requirements of the tubes.
They dictate to me what to do.
At the end of my working day, I am almost always depressed.
Mine is not a straight path like an engineer’s, it’s not A to B. I make a very curly road just by the restrictions of goals and materials.
A real engineer would probably solve the problem differently, maybe make an aluminum robot with motor and electric sensors and all that.
But the solutions of engineers are often much alike, because human brains are much alike.
Everything we think can in principle be thought by someone else.
The real ideas, as evolution shows, come about by chance.
Reality is very creative.
Maybe that is why the Strandbeests appear to be alive, and charm us.
The Strandbeests themselves have let me make them.”
 
Theo’s beach headquarters is a thatch-roofed cabaret-restaurant called De Fuut (the Grebe). 
ts owner, Leo Van Der Vegt, likes to have him and his Strandbeests on the sand beside his restaurant’s outdoor dining area, and sometimes he picks up the tab for Theo and his entourage.
The Scheveningen beach is huge.
From the dunes to the water it’s at least a football field, and maybe half again as far at low tide.
In one direction, the beach stretches more than a mile to the piers of Scheveningen harbor, where a monumental wind turbine rotates counterclockwise against the sky.
In the other direction, the beach dwindles out of sight to the faint silhouetted cargo cranes of Rotterdam.
Along the middle of the sand, parallel to the shore, runs a row of metal-and-plastic trash barrels set in concrete foundations.
Toward Rotterdam, these barrels extend onward until the row becomes a dotted line.
As a visual reference, they are modernist and daunting, and I’ve noticed that photographers and filmmakers who record the Strandbeests’ ramblings try to keep them out of the frame.

On a Saturday morning, Theo loaded several Strandbeests on a rented flatbed trailer and the roof of his Volvo and drove to beach ramp No. 10 with the wind whistling in the tubes.
His friends Hans and Loek came along to help.
Hans teaches language skills to vocational students and Loek takes photographs, teaches high-school and university students about the Strandbeests, and sometimes works as Theo’s assistant (paid).
At the beach, four admirers of Theo’s who are in the master’s program at the Delft University of Technology were waiting for him: Esra, a young woman from Istanbul; Baver, a young man from Ankara; Marta, from Portugal; and Miguel, from Monterrey, Mexico. All spoke English, the language in which classes in the D.U.T. master’s program are taught.
With Theo and his friends, they unloaded the Strandbeests and carried or frog-marched them half a mile from the ramp to the restaurant.

A strong onshore breeze was blowing, causing flags to point inland.
Waves broke and foamed.
Dark shadows of incoming clouds sped over the white sand and carried the dunes in a blink, like the waves’ secret intentions.
Windblown sand was whipping along at ankle level and leaving little drifts behind pebbles.
The few other people on the beach appeared tiny in the immensity, except for the para-surfers, whose scoop-shaped chutes bucked and pirouetted and lifted the riders sometimes twenty feet above the waves. 

Theo was toting a long-handled wooden mallet of the sort usually associated with circus tents. Employing roundhouse overhead blows, he pounded metal stakes into the sand and tethered Strandbeests to them.
One of the animals was a worm that isn’t wind-powered but writhes violently when infused with compressed air; he left it unstaked.
A large Strandbeest seemed about to blow over rather than walk away, and he adjusted its tether to hold it up.
Another, Animaris Longus, was light and limber enough so that it appeared on the verge of trotting off at any moment on the breeze.
Theo laid this one on its side and staked it down.
He then went among the Strandbeests, tinkering while the blown sand hissed against them and the wind made them creak and strain.
Murphy, his dog, followed him and watched everything he did. 

Beach trials the next morning were called off owing to rain, so I took a train to Amsterdam and visited the Rijksmuseum.
Most of the museum is closed for renovations, and its most in-demand paintings have been concentrated in just thirteen rooms—sort of a Rijksmuseum’s Greatest Hits.
I got there at opening time and for twenty minutes or so it wasn’t crowded.
Such a mass of visual sublimity all in one place tramples the viewer like the legs of a thousand Strandbeests, but I did have one thought, despite my dizziness, as I paused in a nook of seventeenth-century landscapes.
I had never been to Holland before, but the minute I arrived I felt as if I had been.
I was comfortable in it.
The reason, I now saw, was that I had previously habituated myself to the place during long contemplations of Dutch landscapes in American museums.
I was like those first-time visitors to New York or Los Angeles who immediately know their way around from having seen the cities so much in movies and on TV.

Soon, the visual trampling administered by the Rijksmuseum’s greatest art was matched by a literal trampling from fierce tour groups speaking every language, and I caromed into Gallery No. 12, a dark room featuring the Rembrandt masterpiece “The Night Watch.”
Packed multitudes stood there in the dark letting the gigantic and glorious and well-lit painting blast them.
Just off that room was a smaller one, not part of the Greatest Hits, with an unassuming show of landscape sketches on paper.
People were passing through it without stopping. I ducked in and took a breath.
The show, “Dunes: Holland’s Wilderness,” was about the shore where I’d just been.
The introductory label said, “Holland’s landscape is man-made.
Only the sands and the dunes along the coast are more or less nature’s creation.
They are our natural defense against the sea. . . .
The earliest known drawings of Holland’s landscape are views of the dunes near Haarlem recorded by Hendrick Goltzius around 1600.
Many landscape specialists followed in his footsteps. . . .
Their work shows the wide, endless space, the quiet and the wildness.”

All the drawings were sketchbook size, done in pencil, ink, or black chalk.
If the giant Rembrandt in the adjoining room was jet-engine powerful, his little horizontal sketch here, of a shore landscape, was moving for its simplicity and self-effacement.
Some of the dune sketches showed the blades of windmills against the sky; the main purpose of Dutch windmills wasn’t so much to mill anything as to pump the incoming sea back out.
A Jacob van Ruisdael sketch with a heavy shading of cloud in one corner showed more clearly the same quality of torque that his paintings often have.
In a vitrine, a leather-bound sketchbook of Gerard ter Borch the younger lay open to a black-chalk drawing of a tangled patch of brush on a hillside.
Such a no-count, lovely piece of ground!
The drawing dated from 1634, though it could have been done in the Scheveningen dunes, or maybe West Texas, just last week.

The weather did not let up, but Theo went ahead with beach trials the following afternoon anyway. Lena Herzog had arrived from New York, and Alexander Schlichter, a German documentary filmmaker who has been making a film about Theo for ten years, had driven up from Hannover.
The four D.U.T. students were there, and Theo’s twenty-year-old son, Zach, and his seventeen-year-old daughter, Divera, and Loek, Theo’s sometime assistant.
Beach passersby and restaurant patrons and their dogs came to watch and stood around and moved on.
Almost everybody took photographs.
Lena Herzog stood on a stepladder, and crawled under the Strandbeests, and lay on her back on the wet sand for her shots.
Alexander Schlichter erected a tripod for his camera, and then, since I was doing apparently nothing, asked if I would be his soundman.
Taken by surprise, I gave a polite and complicated answer that was not “Yes.”

Theo was devoting all his energy to getting a Strandbeest he called Animaris Gubernare up and moving.
This colossus had fan-blade-driven air pumps, ninety-six plastic 1.5-litre bottles to store the compressed air, and a stegosaurus-like nose.
Sand had drifted over its many feet and become soggy with the rain.
Blown sand had got into its joints.
Theo prodded it, repaired some broken tubes, fooled with the blades, sprayed the joints with lubricant, coaxed.
His hair was flying.
His fingernails had become chipped and there was a scrape on his forehead.
Really, all that gets the Strandbeests moving is the enthusiasm of this one guy, and he was in the middle of an agon.
He said to Alexander Schlichter, “If we can get even eleven seconds of videotape today we’ll be doing great.”

But that was not happening.
Theo had us all assemble on the sides of the monster Strandbeest to lift it out of the soft, soggy sand and take it farther down the beach to where the sand was smooth and hard.
When we lifted it, it felt inert, like a heap of wet sand itself.
We carried it, its legs walked stumblingly and unwillingly, we set it down, we carried it again.
Two feet burrowed toe first into the sand and stuck, causing shafts on the corresponding legs to break.
Theo told us to carry it back to where we had begun and the disabled legs trailed brokenly.

Theo often says that he does not know if he is a sculptor or an engineer or what.
His Strandbeests have been in exhibitions all over the world—Munich, London, Taipei, Madrid, Tokyo, Seoul—and he does not care whether they are in art museums or science centers; they have appeared in both.
My theory about Theo is that he is secretly a landscape artist.
His flying saucer was a landscape piece that for a few minutes brought the classical Delft sky up to date.
His Strandbeests, magnets for filming and photography, are really decoys to get us to notice the dunes, sea, and sky.
The endless painful artifice involved in the Strandbeests’ construction is his version of the great painters’ technical skill.
They painted windmills, he builds wild new kinds of windmills for the most acute observers to photograph.

Artists produced more landscape paintings in the northern Netherlands in the seventeenth century than in any other time or place in the world, probably.
Why?
I think the reason goes back to Holland’s landscape being man-made.
The Dutch made it and they liked to look at it.
They had a good workman’s justifiable pride; the landscape paintings were like the “after” pictures of a successful home-improvement project.
Anyone who has stood back and admired a lawn he has just raked knows the feeling.
Theo’s Strandbeests, whose long-range purpose is to restore Holland’s dunes, attempt to compress centuries of Dutch experience; ideally, he would remake the landscape and record it all in one career.
And since the Dutch think constantly about their always challenged lowland, he falls in line with some deep historic impulses.
Chances are, after all, that soon the seas really will rise.
Theo’s ambition is civic-minded and admirably high—to create something beautiful and save his country.
Beyond that, he gets the rest of us thinking about the actual world, and what it’s going to be like, and how humans will actually live in it.

Torque: the beach at Scheveningen seemed to be ruled by it.
Everything was turning, inward-spiralling.
The northeast wind skimmed the waves along the beach like pinwheel blades, the giant wind turbine above the harbor rotated, the para-surfers’ chutes twisted this way and that, the ropes on the masts of the catamarans in drydock beside the dunes snaked back and forth and banged their metal parts on the hollow aluminum with a racket that could frighten off wicked spirits.
In shoreline indentations, heaps of sea foam accumulated and shivered, and clumps of foam kept blowing free and spinning across the sand, assuming corkscrew shapes and in the next instant abrading themselves away.
The speed of their transition from material object to nothing happened so fast it made me queasy.

Theo worked on, fixing, altering, ducking in and out of the huge Strandbeest, searching for replacement parts in plastic storage crates he had brought.
On an outdoor table, the owner of the restaurant set out glass mugs of tea with fresh mint leaves.
In between taking photos and standing around and occasionally pitching in to help, all of us supernumeraries had plenty of chance for conversation.
Lena told me again how much she admires Theo, and how he reminds her of her father, a Russian geophysicist who lives in Yekaterinburg and who has invented a revolutionary new method of petroleum exploration, which, she says, the international oil companies have resisted.
Miguel, the D.U.T. student from Mexico, said he loved living in Holland but worried a lot about the violence in Monterrey, where many of his friends and relatives are.
Baver, the young man from Ankara, said that Holland’s public transportation was vastly better than Turkey’s.
Alexander, the filmmaker, described a documentary he was working on that concerned the creation of artificial life-forms, such as a fish that contains plant DNA and can feed itself by floating in the sun and photosynthesizing.
Esra and Marta, the students from Istanbul and Portugal (respectively), said they were working together on a research project about Theo and the importance of the suspension of disbelief to the creative process.
Like most other kids who know about Theo, they had first encountered him in videos (many of them made by Alexander) on the Internet.
In their rapt regard for him, there appeared no disbelief, suspended or otherwise.
For a moment, Theo took a break and joined the onlookers.
He was frustrated, vexed, abstracted with technical snafus, and unhappy that some of us had to leave soon and would not get to see Animaris Gubernare lumber off into the sunset (as it did successfully the following day).
Then he smiled his sparkling, camera-ready smile.
He was having a wonderful time.

Theo went back to work, and the rest of us continued standing around.
Earlier in the day, he had taken the smaller Strandbeest, Animaris Longus, and moved it onto the smooth sand, maybe just to get it out of the way.
It was a simple, elegant construction of triangular elements in a pyramidal shape supported by two groups of six legs on a central crankshaft.
Animaris Longus had no sails, but was light enough so that a wind could move it without them.
From a distance, it looked like one of those folding pole-and-clothesline contraptions you hang laundry on. 

This Strandbeest stood there for a while, unnoticed.
The shiny, wet sand held its reflection.
Some new customers arrived and sat at one of the restaurant’s outdoor tables.
A minute later, a stronger gust came up, and the apparent clothes-drying rack suddenly went tiptoeing across the sand.
The people at the table did a triple take and began pointing and laughing, and talking in Dutch.
“Dat ding is aan het lopen! ”
(“That thing is walking!”) they cried. 

Saturday, November 7, 2015

Ron Ortner : ocean paintings

Ran Ortner Documentary Teaser (Sept) from Todd Holland

 Meditation on and reflection of the creative process

Artist statement :
In my ocean paintings I’m interested in holding the moment.
I contemplate the collision of opposites at life’s centre, both brutally tragic and endlessly tender.
The ocean mirrors the tempo of my body, the beating of my heart, the in and out of my breath.
Surging contractions birth swells that rise and then die.
Waves like a metronome mark the present, each insisting: now.
In the ocean I’m immersed in now.
Yet in the ancient body of the sea I feel the root of time. In the pulsing surge I feel the wild place of my wilderness beginnings.
There is no totem to the irrational more potent.
Nothing points to the stirrings of my unconscious more than what lies below the surface.
No peril is more ominous.
Yet the sea is where I bathe my wounds.
Where I get lost in all that is luxuriously infinite.
Nothing is more symphonic, more effervescent, more delicately complete than the endless sea.
Ran Ortner, 2015

Friday, November 6, 2015

The jellyfish’s swimming secret? It’s a master of suction

Watch this on The Scene

From Wired

Few natural phenomena are as mesmerizing as a swimming jellyfish, with its graceful full-body contractions.
Biologists rhapsodize about it for a different reason than your typical aquarium-goer, though: It’s a highly efficient way to get around the ocean.
And now, scientists have figured out exactly what helps drive that locomotion.

New research in Nature Communications reveals that jellyfish and an unrelated eel-like creature called a lamprey are in fact more pulling their bodies along than pushing.
That might seem like a minor discovery, but in fact it could transform not only how engineers think about building underwater vehicles, but how biologists think about movement at large.

Take a look at the GIF below.
That’s a swimming lamprey, surrounded by millions of miniscule glass beads.
By shining lasers into the tank and recording it all with high-speed cameras, researchers were able to track the movements of the beads and calculate the different pressures the lamprey creates as it cuts through water.
 A lamprey doing its thing. Red is high-pressure water, while blue is low-pressure.
John O. Dabiri

What you’re seeing in red at the lamprey’s snout is an area of high pressure, which you’d expect where the creature has to break through the water.
More interesting, though, are the blue bits: areas of low pressure that those undulations create.

As the lamprey twists and rotates, it churns the water next to its body into small whirlpools, explains Stanford University’s John Dabiri, a fluid dynamicist who authored the study.
“At the center of those vortices you end up getting low pressure, just like in a hurricane or tornado you often will have low pressure in the middle of that rotating mass of air.”
Those low pressure whirlpools form near the creature’s forward-facing surfaces, sucking in the water ahead of the lamprey and propelling the animal forward.
The jellyfish is the same way: Both animals essentially suction their way through Earth’s oceans.

 
 A lamprey illuminated with the green and red lasers
that track the movement of tiny glass balls in the tank.  
Sean P. Colin

That mechanism makes them highly efficient swimmers.
If these animals just propelled themselves forward by pushing water back with their waggling tails or full-body contractions, they’d waste a lot of energy—imagine the waves left behind a high-speed motorboat.
“In the case of the suction motion,” Dabiri says, “it’s possible to sort of slip past that water without leaving a lot of energy in your wake.”

These findings could be a big deal for engineers.
Like a flick of a fish’s tail tends to waste energy, so too do propellers.
But there may be a way to generate low-pressure suction around a vessel to give it a boost, says Dabiri.

If engineers end up capitalizing on this suction-driven swimming technique, they won’t be the only ones.
Biologists may take note too.
Lampreys and jellyfish are pretty darn evolutionarily distinct—they’re not even remotely closely related.
So if this trick of locomotion is present in two disparate groups, it may well show up elsewhere in the animal kingdom.
To create the low-pressure vortices, both the lamprey and the jellyfish exploit their bendy bits—and all kinds of other structures in the animal kingdom are nice and flexible as well.
“What we see are, for example, wings and fins bending somewhere around 70 percent of the way,” says biologist Jack Costello of the Marine Biological Laboratory, who was also involved in the research.
“That seems to be true whether it’s a mosquito wing or a condor wing or fish bodies.”

 Another shot of a swimming lamprey, this one showing the direction of flowing water.  
John O. Dabiri

Could it be that other creatures out there are utilizing the suction trick?
With such a big advantage in energy savings, one might expect evolution to select for it.
“It’s such a strong selective force acting, it doesn’t care what lineage you come from,” says Costello. “It’s sort of like gravity doesn’t care whether you’re a dinosaur or a tsetse fly.”
The beautiful, hypnotic jellyfish, then, may hold far more secrets than it lets on.
So the next time you’re at the aquarium, take time to appreciate its ballet.
It’s kind of a big deal.

Thursday, November 5, 2015

Studying the use of satellite-derived bathymetry as a new survey tool

Mutton shoal in the GeoGarage

From NOAA by Ensign Kaitlyn Seberger

Nautical charts are an important tool in navigating safely in coastal waters, and Coast Survey’s mission is to keep these charts up to date.
However, maintaining accurate charts can be a challenge in locations where sandy shoals may shift seasonally and present a danger to navigation.
These areas differ from the current nautical charts, and bottom contours change so rapidly that it may seem an impossible task to keep up using the traditional survey methods.
Office of Coast Survey and NOAA Ship Thomas Jefferson are seeking a solution to this ongoing problem and may have an answer with satellite-derived bathymetry.

Satellite-derived bathymetry (SDB) begins with using multi-spectral satellite imagery, obtained by satellites such as Landsat and WorldView2, which compares green and blue color bands.

Multi-spectral satellite imagery of Mutton Shoal in Nantucket Sound, overlaid on the chart.

Green color bands are attenuated by the water faster than blue bands and help to infer relative depths of the water (blue areas being deeper than green).
These images are then transformed into a color range scale applicable to the color scale used when surveying with a multibeam echo sounder.
With the color range applied, reds on the image represent an area that may be shoal whereas blues and greens represent deeper water.

Satellite-derived bathymetry of Mutton Shoal with a color range scale that is correlated with the color scale used for multibeam processing.

Since the images are based on attenuation of color bands, depth can only be inferred, so survey equipment (such as vertical beam and multibeam sonars) is necessary to acquire true depth.

This fall, NOAA Ship Thomas Jefferson investigated the use of satellite-derived bathymetry imagery as a new survey tool.
Survey technicians will calibrate the application of this imagery through bathymetry studies for Nantucket Sound and Chincoteague Island.
NOAA Lt. Anthony Klemm, who is leading the studies, chose these project areas because they both had relatively clear shallow water and were in a highly changeable area.
At these locations, he chose specific shoals for exploration based on vessel traffic density.

In October, Thomas Jefferson spent two days in Nantucket Sound researching shifting shoals using the satellite-derived imagery overlain on the most recent chart.
Ensign Marybeth Head developed line plans to acquire data over the potential location of shoals as seen with the satellite images, as well as their charted locations.
Survey launches acquired multibeam data in water deeper than six feet, and Z-Boats were sent in to acquire vertical beam data in areas too shoal for the launches to safely operate.

Satellite-derived bathymetry of Mutton Shoal with multibeam data from the investigation overlaid. This picture demonstrates how accurate the location of the shifted shoal was compared to the SDB imagery.

During routine conductivity, temperature, and depth casts for sound speed velocity, Ensign Head and Ensign Kaitlyn Seberger used a Secchi disk to determine the attenuation coefficient at each cast location for later comparisons.

The satellite imagery was a vital tool in project planning, as well as determining safe navigation of the ship and the survey launches.
Below is a picture of the chart location where Thomas Jefferson intended to anchor.
The adjacent image is the satellite-derived bathymetry imagery indicating the anchorage would have been within a shoal area and unsafe for anchoring.

Long Shoal in the GeoGarage

Side-by-side picture of the chart and SDB imagery for the intended anchorage location in Nantucket Sound.
SDB imagery indicated a shoal that covered half of the anchorage safety circle.
A Z-boat verified the indicated shoal was almost 30 ft shoaler than charted and without this useful imagery, the ship and launches could have run aground.

Ensign Head determined safe passage routes for the survey launches, using the satellite-derived bathymetry imagery overlaid on a chart of the area, as the charted soundings were not reliable.
For example, a safe passage route between the study areas and the ship was located between two shoals that had shifted considerably from the chart of the area.
Sections of the passage are currently charted at 20 feet or more of water, but the fathometer on the launch displayed depths of less than 10 feet.

Boat sheet for the launches indicating a potential safe passage route
from the project area to the ship. 

After processing the multibeam data, Ensign Head determined that more than half of the charted shoals in the project area had shifted and the red zones depicted in the satellite-derived bathymetry imagery were significantly shoaler than charted depths for the surrounding area.
Results from the investigation showed that the satellite-derived bathymetry for Nantucket Sound was exceptionally accurate and aided in the identification of current navigational dangers.

However, more research is needed regarding the use of satellite-derived bathymetry as a contemporary survey method.
Limitations on use of the imagery can include variables such as cloud cover, turbidity, Chlorophyll a, and other water quality properties that may affect attenuation.
Despite these challenges, satellite-derived bathymetry is a new tool that could support survey efforts by reducing the amount of time and area necessary to survey and by increasing the effectiveness of NOAA’s efforts to efficiently provide safe navigation to the local mariner.

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A wintry sea seems a safer bet than life at home for refugees

Migrant crisis: more than 4,000 migrants and refugees have had to be rescued
by the Greek Coast Guard off the shores of Lesbos this month alone. 
Migrant tragedy in Greek seas shows dangers as winter nears
(Monthly record of 218,000 reach EU by sea)
EU predicts 3 million more migrants could arrive by end 2016

From NYTimes by Rick Lyman

The rubber dinghy rolled perilously on the waves and twisted sideways, nearly flipping, as more than three dozen passengers wrapped in orange life vests screamed, wept and cried frantically to God and the volunteers waiting on the rocky beach.

Khalid Ahmed, 35, slipped over the side into the numbing waist-high water, struggled to shore and fell to his knees, bowing toward the eastern horizon and praying while tears poured into his salt-stiff beard.
“I know it is almost winter,” he said.
“We knew the seas would be rough. But please, you must believe me, whatever will happen to us, it will be better than what we left behind.”

Migrants from Turkey arriving on the Greek island of Lesbos in early November.

The great flood of humanity pouring out of Turkey from Syria, Afghanistan, Iraq and other roiling nations shows little sign of stopping, despite the plummeting temperatures, the increasingly turbulent seas and the rising number of drownings along the coast.

If anything, there has been a greater gush of people in recent weeks, driven by increased fighting in their homelands — including the arrival of Russian airstrikes in Syria — and the gnawing fear that the path into the heart of Europe will snap shut as bickering governments tighten their borders.
“Coming in the winter like this is unprecedented,” said Alessandra Morelli, the director of emergency operations in Greece for the United Nations High Commissioner for Refugees.
“But it makes sense if you understand the logic of ‘now or never.’ That is the logic that has taken hold among these people. They believe this opportunity will not come again, so they must risk it, despite the dangers.”

A dinghy crowded with migrants approaching Lesbos.
Refugees and relief workers shrug when asked how far into winter people will try to make the treacherous crossing.

The surge means that countries throughout the Balkans and Central Europe already under intense logistical and political strain will not find relief — especially Germany, the destination of choice for many of the refugees.
Hopes that weather and diplomacy would ease the emergency are unfounded so far, putting more pressure on financially strapped and emotionally overwhelmed governments to quickly find more winterized shelter.


Zoom on Lesbos, Chios, Samos, Farmakonisi, Léros, Kalymnos, Kos & Symi islands
with the GeoGarage (NGA nautical chart)

The influx also underscores the European Union’s failure to reach a unified solution to the crisis, leaving places like this, on the Greek island of Lesbos in the northern Aegean Sea off the coast of Turkey, struggling to deal with huge numbers of desperate people and raising questions about what will happen not just this winter, but in the spring and beyond.

Early this week, the number of people who had crossed into Greece from Turkey hit 600,000, after having passed 500,000 only a few weeks earlier.

Boats and life jackets left by migrants on a Lesbos beach.
“Coming in the winter like this is unprecedented,” said Alessandra Morelli, the director of emergency operations in Greece for the United Nations High Commissioner for Refugees.

Both migrants and relief workers shrug when asked how far into the winter people will try to make the treacherous crossing.
“Some of the smugglers, they tell the people who call them, ‘Yes, there will be more trips, you should come,’ and so the people keep coming,” said Abu Jawad, a 28-year-old Palestinian Syrian who works as a broker for Turkish smugglers, recruiting passengers from the crowds in Izmir, Turkey, and other coastal cities.
“So what I think is that people will keep coming as long as the smugglers tell them to come, and the smugglers will keep attempting trips as long as the people are coming,” he said.


In mid-October, an average of 8,700 a day were landing in Greece, peaking at 10,006 on Oct. 21. Fistfights broke out, and there were some stabbings, as people tried to cut in line to get the precious documents from Greek officials that allowed them to take a ferry to Athens and beyond.
Relief workers sent out pleas for help and resources.
But smaller numbers of migrants arrived, largely because of the weather, and the adoption of a new system that divided the migrants into groups to apply for the necessary papers allowed officials in Lesbos to more easily send refugees on their way.
The landings fell to an average of 5,800 a day before creeping up to 6,200 per day in the last seven days. In all, 16,500 people were waiting in camps across the Greek islands on Wednesday for transport to the mainland.
But the calm may be short-lived: a four-day strike by Greek ferry workers that began on Tuesday threatened once again to create bottlenecks and overwhelm relief workers who had only just begun to catch their breath.

In the meantime, with every break in the weather, rafts and dinghies continue to wash ashore.
On Saturday, 9,300 people landed on the Greek islands, when it was unseasonably balmy.
On the next two days, when the north winds blew more fiercely, about half that number arrived.
On Tuesday, once again, the seas calmed and boats appeared one after another pushing across the choppy strait.
“We had no choice,” said Nouri Mahmoud, 60, who once ran a small oil company in Syria.
“We had to leave Aleppo. It has gotten much worse in recent weeks. The rebels are fighting each other, and now we have the Russians, too. Everyone is fighting everyone else. Whoever comes into Aleppo next is going to be slaughtering people.”
Clustered around him in the doorway of a temporary shelter at a refugee center were his wife and his 15-year-old triplets.
“We can’t go back now,” Mr. Mahmoud said.
“We have nothing to go back to.”

 A man holds up a young boy as a boat carrying migrants and refugees arrives at the Greek island of Lesbos after crossing the Aegean sea from Turkey
Photo: AFP

That the crossing is getting more perilous — as it does every winter when the northern winds and the sinking temperatures churn and chill the sea — is beyond doubt.
Last Wednesday, a boat carrying more than 250 migrants — a “yacht,” the Turkish smugglers call them, but they are usually old and creaky tubs — foundered in the stretch between Turkey and the north shore of Lesbos.
More than three dozen drowned.
And that was only the largest recent catastrophe.
In one day this week, 11 people died when a boat capsized just 30 yards off the shore of Samos, another Greek island; two died off the shore of Rhodes, and six perished in the waters north of Lesbos.
“We are confronted with these shipwrecks every day now,” Ms. Morelli said.

In an outdoor coffeehouse one afternoon last week outside the main train station in Izmir, several dozen Syrian refugees sipped tea at rickety tables.
Nearby shops sell life jackets, inner tubes and waterproof packets for cellphones and passports.
“Of course, we are aware that winter is coming, but it took us this long to sell all of our land and our house in Deir ez-Zor,” said Ahmed Ali, 28, who was surrounded by a half-dozen family members.
“Now, with the Russians bombing in places, we think the situation will be even worse.”
He is waiting, he said, to shop among the smuggling operations to try to divine which one he can trust.
“What choice do we have now but to move forward?” he said.
“We have nothing left at home to return to. Tell me, where else can we go?”
By late Tuesday night, Mr. Ali said, the family had already reached Lesbos, taken a ferry to Athens, crossed through Macedonia and Serbia and was making its way across the Croatian border.

A few yards away, at another tottering table, Adnan Sheikh Mohammad clicked shut his flip-phone and smiled broadly, clapping his cousin, Sami, on the shoulder.
“I have made a deal with a smuggler,” he said.
“God willing, we leave tomorrow.”
The price was $1,100 per adult, half that for the children, a sizable amount for a party of 12 adults and 10 children.
They plan to make their way to Sweden, where friends live, but they do not know the exact path they will follow.
“We are going to get off the boat in Athens and just follow the crowd,” said Sami, 39, who had been a barber in Aleppo.

A woman waved a life jacket to direct a migrant boat ashore as it made the crossing from Turkey to the Greek island of Lesbos.
Carl Court/Getty Images

The next afternoon, volunteers waited at high points on Lesbos’ shore and scanned the horizon.
Every now and then, small orange dots bobbing in the distance slowly clarified into a line of smaller orange dots.
As they drew closer, they transformed, like apparitions, into a few dozen people in orange life vests, waving frantically.
A volunteer clambered atop his car and began twirling a life vest over his head, signaling the boat to head to his left, away from a more treacherous stretch of shore.
But the migrants did not see him or were unable to control the boat, and it crashed into the surf line on a jagged patch of stones.

It had clearly been a terrifying crossing.
A half-dozen children wailed and clutched at their mothers, who were also weeping, the men looking about, trying to figure out what to do.
Volunteers charged into the waves and tried to keep the boat perpendicular to the shore, but the force of the water was too strong and it flattened against the shoreline, threatening to upend.
One by one — children first, then women, then men — the passengers were unloaded and escorted the final few feet to shore.
They looked around, dazed and tearful, but they all survived.
“Adi! Adi!” a frantic mother screamed, spotting her son leaning against a nearby rock.
She fell to the ground, pulled up the leg of his pants and began to kiss his shivering shin.