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What Isn't There an App For?

quanminoan Re:A really decent math/science/eng. app for Andro (421 comments)

The guys at EES just released a $10 app, though not free. There are also python apps. Another good one for quick calcs is Wolfram alpha. I agree there needs to be a great open source app with programmable functionality and saved scripts.

about three weeks ago

Dogs Defecate In Alignment With Earth's Magnetic Field

quanminoan Re:Patent Pending (222 comments)

A Faraday cage wouldn't stop static magnetic fields; you would need mu metal or superconducting materials to help decrease the magnetic field of earth.

1 year,27 days

Bill Nye To Debate Creationist Museum Founder Ken Ham

quanminoan Re:Is Bill Nye qualified? (611 comments)

First time I heard a professional needs a PhD.

1 year,27 days

1976 Polaroids of an Apple-1 Resurface

quanminoan Re:And this news, how? (120 comments)

I imagine it would be more like finding a copper smelting pit and then some used tools - all cool stuff right?

more than 2 years ago

Lawyers For Mining Companies Threaten Scientific Journals

quanminoan Re:Hmmm... Let's see... (205 comments)

... "why are people with trait XY not applying?"

Actually, I think it is those with trait XX that are usually misrepresented?

more than 2 years ago

Nuclear Energy Now More Expensive Than Solar

quanminoan Re:Nights (635 comments)

"And don't forget that these superconducting grids will be dangerous as hell, if you're pushing enough current through a cable to power north america and any part of the cooling system fails the resistance goes from zero to anything non-zero and your superconducting cable explodes extremely violently.

I'd agree these superconducting cables have issues, but exploding really isn't one of them. Most modern superconducting magnetic coils and cables are designed around quenching and have copper dump loads built into the cables. The real killer for power is the energy required to keep the cables cool...

IMHO, the solution to solar would be affordable large scale energy *storage* (magnetic energy storage, large vacuum composite flywheels, etc.).

more than 4 years ago

Fermilab Experiment Hints At Multiple Higgs Particles

quanminoan Re: I need a bazzilion dollars... (271 comments)

Beautiful. Never read a more perfect summary of the necessity of doing pure science.

more than 4 years ago

ITER Fusion Reactor Enters Existential Crisis

quanminoan Re:Terrible summary (470 comments)

Greenpeace's stance on anything is mostly sensationalist rubbish.

more than 4 years ago

Write Bits Directly Onto a Hard Drive Platter?

quanminoan Re:Slashdot trolled (578 comments)

The AFMs you cite only use stepper motors for the first stage of precision movement. The precision movement at the atomic level is handled by piezo devices (i assume called piezoelectric actuators). These are very difficult to control since they have complex hysteresis involved with their movement, and change their properties over time. Expensive as well. He *is* better off using the hard drive components to do what he wants...

more than 4 years ago

Piston-Powered Nuclear Fusion

quanminoan Re:Actively stabilized fusion (147 comments)

Polywell more wacky than this? There are a number of things I can't see them getting right with this piston concept any time soon. Personally, I don't think they can make a uniform shockwave using pistons, but we'll see I guess. The plasma vortex rings sounds interesting. I guess my primary question would be using the lead lithium blanket next to the plasma. Invariably, you'll have some vapor in the plasma region, and these higher Z atoms should wreck havoc with Bremsstrahlung radiation. The polywell already produces neutrons from fusion, avoids Bremsstrahlung more than the original "fusor" concepts, and should be scalable. Granted, I actually feel that the more conventional schemes have a greater chance of success currently. ITER should break even...

more than 5 years ago

Ancient Fossil Offers Clues To Primate Evolution

quanminoan Re:I got 10 bucks here ... (311 comments)

The correct answer is "Yes. I will take that bet."

more than 5 years ago

Tying Knots With Light

quanminoan Re:The summary misses the key point (125 comments)

Exactly - the magnetic confinement for a fusion torus is already completely closed. With a torus, as I understand, there are issues with plasma stability that limit the performance of the devices. However, there is no need for this light looping when you can just alter the magnetic field. Stellarators use a sort of 'helical' magnetic field twisting around a toroid to create a much more stable environment. See: http://www.physics.ucla.edu/icnsp/Html/spong/w7x_with_coils.JPG.

more than 6 years ago



The Hobby of Energy Secretary Steven Chu

quanminoan quanminoan writes  |  more than 4 years ago

quanminoan (812306) writes "Nobel Laureate and United States Secretary of Energy Steven Chu (http://en.wikipedia.org/wiki/Steven_Chu) has continued to publish even while in office. While previous research topics include gravitational redshift (http://www.nature.com/nature/journal/v463/n7283/full/nature08776.html), Chu has coauthored a paper entitled "Subnanometre single-molecule localization registration and distance measurements" which discusses a way to optically image objects as small as 0.5 nm — a large step down from the previous limit of 10 nm. Chu does this in his free time, claiming "I just consider it my equivalent of ... vegging out in front of the TV"."
Link to Original Source

Researchers Develop a Magnetic Battery

quanminoan quanminoan writes  |  more than 5 years ago

quanminoan (812306) writes "Researchers at the University of Miami and at the Universities of Tokyo and Tohoku, Japan, have created a new kind of battery which is charged by a large external magnetic field. The energy is then stored in nano-magnets in a device known as a magnetic tunnel junction (MTJ). While the present battery is too small to produce any appreciable power, it is hoped that the research will lead to improved computer memory or batteries capable of powering cars."


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