Starship Asterisk*

judy wrote:should we go to the big bucket wheel excavator picture of the day if we want to pictures of the universe?

http://www.dartmouth.edu/~news/releases/2005/09/14.html wrote:
Dartmouth researchers build world's smallest mobile robot
Dartmouth College Office of Public Affairs
Press Release Posted 09/14/05

<<In a world where "supersize" has entered the lexicon, there are some things getting smaller, like cell phones and laptops. Dartmouth researchers have contributed to the miniaturizing trend by creating the world's smallest untethered, controllable robot. Their extremely tiny machine is about as wide as a strand of human hair, and half the length of the period at the end of this sentence. About 200 of these could march in a line across the top of a plain M&M.

I can only imagine what this must do to the roadbed. And I can imagine what this monster does to the environment.

The microrobot on a penny. (Courtesy Donald Laboratory)

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The microrobot is untethered and controllable.

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The researchers, led by Bruce Donald, the Joan P. and Edward J. Foley Jr. 1933 Professor of Computer Science at Dartmouth, report their creation in a paper that will be presented at the 12th International Symposium of Robotics Research in October in San Francisco, which is sponsored by the International Federation of Robotics Research. A longer, more detailed paper about this microrobot will also appear in a forthcoming issue of the Journal of Microelectromechanical Systems, a publication of the IEEE, the Institute of Electrical and Electronics Engineers.

"It's tens of times smaller in length, and thousands of times smaller in mass than previous untethered microrobots that are controllable," says Donald. "When we say 'controllable,' it means it's like a car; you can steer it anywhere on a flat surface, and drive it wherever you want to go. It doesn't drive on wheels, but crawls like a silicon inchworm, making tens of thousands of 10-nanometer steps every second. It turns by putting a silicon 'foot' out and pivoting like a motorcyclist skidding around a tight turn."

The future applications for micro-electromechanical systems, or MEMS, include ensuring information security, such as assisting with network authentication and authorization; inspecting and making repairs to an integrated circuit; exploring hazardous environments, perhaps after a hazardous chemical explosion; or involving biotechnology, say to manipulate cells or tissues.

McGray, who earned a Ph.D. in Computer Science working on this project in Donald's lab, adds, "Machines this small tend to stick to everything they touch, the way the sand sticks to your feet after a day at the beach. So we built these microrobots without any wheels or hinged joints, which must slide smoothly on their bearings. Instead, these robots move by bending their bodies like caterpillars. At very small scales, this machine is surprisingly fast." McGray is currently a researcher at the National Institute of Standards and Technology in Gaithersburg, Md.

The prototype is steerable and untethered, meaning that it can move freely on a surface without the wires or rails that constrained the motion of previously developed microrobots. Donald explains that this is the smallest robot that transduces force, is untethered, and is engaged in its own locomotion. The robot contains two independent microactuators, one for forward motion and one for turning. It's not pre-programmed to move; it is teleoperated, powered by the grid of electrodes it walks on. The charge in the electrodes not only provides power, it also supplies the robot's instructions that allow it to move freely over the electrodes, unattached to them.>>

biddie67 wrote:Good Grief!!!!

A list of thoughts:
1. it's so big, with all those heavy long arms, how does it even hang together?
2. I bet that road is going to need repairs after the BWE gets to the other side.
3. Speaking of the "other side", like that un-named chicken of yore, why did the BWE cross the road?
4. How many people does it take to run a BWE?
5. There's a huge open sand pit near my home, dug by many "mini-me's" like that - sure destroyed a beautiful forest area.
6. Imagine something like this up on the moon, mining for some perceived valuable rock that was being shipped back to Earth - how quickly would it mess up the orbital dynamics of the moon?

K1NS wrote:First of all, as the caption says, this monster can change the face of the earth. But secondly, I am sure I have seen this machine in a science fiction movie somewhere!

But seriously, . . . it is described as a bucket wheel, but it is actually a large rotary saw blade, or more accurately a dado blade since it cuts a groove instead of slicing an object.