According to Wikipedia, the resonances occur at extremely low frequencies (ELF) around 7.83 (fundamental), 14.3, 20.8, 27.3 and 33.8 Hz. That's Hertz, not megaHertz. Now, how can we tune them in? I, for one, do not own a radio that can receive those frequencies.
I like this idea a lot. And it seems like an excellent project for an Open Source Hardware community to develop a flexible platform for sliders, knobs, and switches to interface with a PC or Mac. Then anyone who wanted sliders, knobs, and/or switches wouldn't have to re-invent the wheel.
No they aren't. They are translated into United States Customary Units. Imperial Units are used in places like England and Canada, and differ from United States Customary Units in volume (ounce, pint, quart, gallon) and mass (stone, ton).
I agree! These guys did something quite fantastic, and just because they can't clearly explain the mathematics to us doesn't detract from the fact that they did it!
Hopefully scientists will find time to develop the theory and publish it. Until then, I think it's just like living in 1904, when the Wright brothers first flew a powered aircraft.
Agreed, the MIM diode seems to be shrouded in mystery. (Wikipedia, you have failed us!) From reading the links at oregonstate.edu and uspto.gov, it looks like this. A metal-insulator-metal device is a capacitor. If you make the insulator very thin, electrons can tunnel through from one metal-1 to metal-2. Also backwards, from metal-2 to metal-1. The device is inherently symmetrical, passing electrons both ways, and is not a diode but a leaky capacitor. To make it work like a diode, there has to be some asymmetry involved. One way is to bias the junction with a DC voltage. Another way is to use metal electrodes with different work functions. Either way, you make it easier for an electron to tunnel in the forward direction than going backwards -- a diode. The rest of the story is that an MIM diode can be made very small so it will work at extremely high frequencies, such as visible light, which means it could be used to rectify sunlight -- a new kind of photovoltaic device to provide solar energy.
...ferromagnetic liquid coated with a metal-like film... very strong magnetic fields... non-linear problems of control...produced... liquid mirror just five centimeters across with ninety-one actuators cycling at one Kilohertz and the ability to linearize the response of the liquid.
Yikes! That is ONE TOUGH PROJECT. Sure am glad I'm not working on it! *sigh of relief*
In the cubicle farm, DON'T
- whistle or hum
- play a radio
- use a speaker-phone
- smoke anything
- throw a football
- raise your voice
- bang your head against something hard, like your desk
In general, DON'T
- touch another employee
- show up for a meeting after it has already begun
- park in a space labeled "Reserved for..."
Slashdot Mirror
why not plain old 12VDC? ... we already have a connector for this
Because a cigarette-lighter connector is noisy and unreliable! Sheesh, I hate them.
According to Wikipedia, the resonances occur at extremely low frequencies (ELF) around 7.83 (fundamental), 14.3, 20.8, 27.3 and 33.8 Hz. That's Hertz, not megaHertz. Now, how can we tune them in? I, for one, do not own a radio that can receive those frequencies.
Researchers at Stanford University have invented ONE HALF OF A BATTERY....
How the heck do you pronounce "Duqu"?
I like this idea a lot. And it seems like an excellent project for an Open Source Hardware community to develop a flexible platform for sliders, knobs, and switches to interface with a PC or Mac. Then anyone who wanted sliders, knobs, and/or switches wouldn't have to re-invent the wheel.
"in communities with low unemployment"
What the heck does low unemployment have to do with super high speed access?
FTFA: "The team managed this through time reversal...."
The second place winner is called "Grouping by Contrast"
Mirror here: http://www.moillusions.com/2011/05/grouping-by-contrast.html
The first place winner is called "Silencing Awareness of Change by Background Motion" and is the blinking-dots-in-a-circle illusion.
Several versions here: http://visionlab.harvard.edu/silencing/
Third Place Winner is called the "Loch Ness Aftereffect"
Available on YouTube: http://www.youtube.com/watch?v=Djd218oWOGQ
Higher quality version at http://lpp.psycho.univ-paris5.fr/wexlerillusion/
``Yeah, we don't use "antennae" 'round here.
What is with people who insist on the -ae?
IT'S ANTENNAS, FOLKS!!!
...they are translated into Imperial units...
No they aren't. They are translated into United States Customary Units. Imperial Units are used in places like England and Canada, and differ from United States Customary Units in volume (ounce, pint, quart, gallon) and mass (stone, ton).
Yes. According to Wikipedia, "It completed more than 700 orbits over seven weeks."
Note to OP: 2 != 7
Well, I suppose we could call it Aurora Equatorialis.
I agree! These guys did something quite fantastic, and just because they can't clearly explain the mathematics to us doesn't detract from the fact that they did it!
Hopefully scientists will find time to develop the theory and publish it. Until then, I think it's just like living in 1904, when the Wright brothers first flew a powered aircraft.
For Christ's sake, land sails already go 2-3 times faster than the wind using the exact same principles used in these carts.
No, they don't exactly the same principles.
Land sail, and sailboats too, cannot sail faster than the wind when they are aimed directly downwind.
But somehow, this cart can. And that's what makes it difficult to understand.
Agreed, the MIM diode seems to be shrouded in mystery. (Wikipedia, you have failed us!) From reading the links at oregonstate.edu and uspto.gov, it looks like this. A metal-insulator-metal device is a capacitor. If you make the insulator very thin, electrons can tunnel through from one metal-1 to metal-2. Also backwards, from metal-2 to metal-1. The device is inherently symmetrical, passing electrons both ways, and is not a diode but a leaky capacitor. To make it work like a diode, there has to be some asymmetry involved. One way is to bias the junction with a DC voltage. Another way is to use metal electrodes with different work functions. Either way, you make it easier for an electron to tunnel in the forward direction than going backwards -- a diode. The rest of the story is that an MIM diode can be made very small so it will work at extremely high frequencies, such as visible light, which means it could be used to rectify sunlight -- a new kind of photovoltaic device to provide solar energy.
Actually, what is the population of Earth north of 55 degrees (north latitude)? Is there any way to find that statistic?
This is weird. I swear I heard him say "E-bay" toward the end.
Because you need gravity to create the perfectly-shaped mirror surface on the rotating bowl of mercury. On Earth, that's easy. In zero g, no gravity.
I'm sorry, your grant application has not been approved.
Yikes! That is ONE TOUGH PROJECT. Sure am glad I'm not working on it! *sigh of relief*
In the cubicle farm, DON'T
- whistle or hum
- play a radio
- use a speaker-phone
- smoke anything
- throw a football
- raise your voice
- bang your head against something hard, like your desk
In general, DON'T
- touch another employee
- show up for a meeting after it has already begun
- park in a space labeled "Reserved for..."
What? He's in MELBOURNE? His URL (.tl) says he's in EAST TIMOR!
Nice picture. Oh,look! It's held together with masking tape!
Agreed. Surface-mount components? They're way too big for a hearing aid. The components are all in the custom IC.