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Comments

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No, a Huge Asteroid Is Not "Set To Wipe Out Life On Earth In 2880"

WalksOnDirt Re:Asteroids are a threat - let's deal with them (115 comments)

This asteroid is only around 1 km in diameter. An impact would be distinctly annoying, but civilization, and most people, should survive.

2 days ago
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Stanford Team Creates Stable Lithium Anode Using Honeycomb Film

WalksOnDirt Re:Stable? (119 comments)

At one cycle a day that will take awhile.

Cui has previously touted results of a different battery after only eight cycles, so 150 is quite an improvement. They are still a long way from having something ready to sell, and they don't claim otherwise.

about three weeks ago
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Stanford Team Creates Stable Lithium Anode Using Honeycomb Film

WalksOnDirt Re:Stable? (119 comments)

I think you ask too little. What get me are quotes like this;

The team is looking at a price point of $25,000 for an EV battery range of 300 miles, which would be competitive with a 40 mpg gasmobile.

That's not actually what the team said, it is a paraphrase of something Chu said about what is desirable in an EV. The author apologizes in the first comment.

Don't blame the researchers for the idiocy of the article's author.

about three weeks ago
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Stanford Team Creates Stable Lithium Anode Using Honeycomb Film

WalksOnDirt Re:Stable? (119 comments)

150 charge/discharge cycles is not very much. That is only 5 months use.

Initial testing of batteries is usually done at C/20, or less than one cycle per day. I don't know if they sped this up any, but it would still take quite a while for 150 cycles. You're asking too much from a research project.

about three weeks ago
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I typically start my workday ...

WalksOnDirt When I was working... (141 comments)

I used to show up at work before 6 and leave after 19. I only did this three days a week, though. It was totally at my discretion how I put in my 40 hours, but it was too long a drive to do it more often, and driving during rush hours was also not appealing.

But since I am long retired, I chose the last option.

about 2 months ago
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Rising Sea Levels Uncover Japanese War Dead In Marshall Islands

WalksOnDirt Re:Sea Level Hype (182 comments)

By the year 2200, sea level is expected to rise somewhere between 4 and 30 inches.

A more reasonable guess might be around a meter by 2100, plus or minus a half meter. What will happen in 2200 will depend too much on our actions before then to say much.

about 2 months ago
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Future of Cars: Hydrogen Fuel Cells, Or Electric?

WalksOnDirt Re:Electric. (659 comments)

...this for ex (300 miles of power) which was just announced...

There is a lot of marketing speak at your link, and very little technical information. Some of it is just wrong, like the implication that rare earths are heavily used in batteries. My bet is it is a scam.

about 3 months ago
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Al Franken Says FCC Proposed Rules Are "The Opposite of Net Neutrality"

WalksOnDirt Secret! (282 comments)

Way to go, Al. The stupidity of your colleagues was supposed to be a secret!

about 3 months ago
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Why Hollywood's Best Robot Stories Are About Slavery

WalksOnDirt Re:Add "Small Wonder" to the list... (150 comments)

I watched the show. I may have missed the final episode (I don't remember) but it definitely lasted more than one season. It was a lighthearted children's show, and your ending would be completely out of character for it. I believe Wikipedia.

about 3 months ago
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Stanford Getting Rid of $18 Billion Endowment of Coal Stock

WalksOnDirt Re:Divest of Electrical Use Too? (208 comments)

Not much electricity comes from burning coal out Stanford's way.

about 3 months ago
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Siphons Work Due To Gravity, Not Atmospheric Pressure: Now With Peer Review

WalksOnDirt Re:Actually it's both. (360 comments)

Pure water, without any dissolved gasses, has a substantial tensile strength. It is not theoretically stable, but in practice it is. Enough so that a siphon will work in a vacuum.

Such pure water is hard to find, though.

about 4 months ago
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The GNOME Foundation Is Running Out of Money

WalksOnDirt Re:Gnome go home (693 comments)

They're broke.

Indeed, but you should also mention it should have been "you're broke". It's obvious, of course, but it happens so often that some might have missed it.

about 4 months ago
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Tesla: A Carmaker Or Grid-Storage Company?

WalksOnDirt Re:Panasonic (151 comments)

The current Tesla cells are too expensive for grid storage. Nickle and cobalt are not cheap. Nothing says they can't make two types of batteries though, nickle cobalt for cars and manganese dioxide or iron phosphate for the grid. Or they could have a nice lithium sulfur chemistry they could use for both; there has been a lot of recent development in that area.

about 4 months ago
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Einstein's Lost Model of the Universe Discovered 'Hiding In Plain Sight'

WalksOnDirt Re: How big is it? (118 comments)

We do it now. What is NaN/NaN? NaN.

about 5 months ago
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National Ignition Facility Takes First Steps Towards Fusion Energy

WalksOnDirt Re:if this keeps up... (127 comments)

...D2O which is expensive but abundant (it makes up about 1 part in 40 million of water molecules)...

That 1 part in 40 million figure, while not wrong, is misleading.

Quoting Wikipedia:

It [duterium] has a natural abundance in Earth's oceans of about one atom in 6,420 of hydrogen.

So the hydrogen in the ocean is 1/6420 deuterium. Getting two of the deuteriums into one molecule is rare, but we don't really care. Chemical bonds are unimportant energetically compared to nuclear reactions.

about 6 months ago
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Ask Slashdot: Should Developers Fix Bugs They Cause On Their Own Time?

WalksOnDirt Says who? (716 comments)

A builder builds a wall. A week later, bricks begin to fall out of the bottom, but he continues to build the wall higher. In most cases, he would have to replace those lower bricks at his own expense and on his own time.

If the builder is an independent contractor it will depend on the bid. If it is time and material he won't, but if the contract is for the job he will. If the builder is an employee he is never responsible: He either learns not to do that or he should be fired.

It is the same for software development.

about 6 months ago
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Study: Some Antioxidants Could Increase Cancer Rates

WalksOnDirt Re:Not very surprising. (117 comments)

The lack of living grandparents probably has a negative effect on a child, or even might prevent his birth. Not a large effect, though.

about 7 months ago
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23-Year-Old Chess Grandmaster Whips Bill Gates In 71 Seconds

WalksOnDirt Re:Big deal. (449 comments)

Carlsen played a non-standard opening and included an unsound sacrifice. He had probably looked at the first few moves for his blitz games, but no deeper since he would never play it in serious games.

Gates had two minutes for the entire game. For someone who is not obsessed with chess that is not enough time to make even sort of good moves.

about 7 months ago

Submissions

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Callisto May Explode

WalksOnDirt WalksOnDirt writes  |  about 6 years ago

WalksOnDirt (704461) writes "Russian scientist Eduard Drobyshevsky suggests in Pravda that the conductive icy shells of the moons of outer planets can under go electrolysis because of movement through magnetic fields. The resulting hydrogen and oxygen can explode, endangering Earth. He says Titan's explosion 10,000 years ago created Saturn's rings, and when Calisto goes it will lead to nuclear winters on Earth."

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