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Comments

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NIF Compresses Diamonds With 50 Million Atmospheres of Pressure

idji Re:Car analogy? (81 comments)

during the impact.

about a week ago
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Sand-Based Anode Triples Lithium-Ion Battery Performance

idji Re:Launch date (60 comments)

please unsubscribe from "news for Nerds". We are here for news, and we are nerds, we want new ideas.

about two weeks ago
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Physicists Spot Potential Source of 'Oh-My-God' Particles

idji Re:Ooh, ooh, I have a bogus theory (144 comments)

because the annihilation particles are all well known and have MUCH less energy than these particles.

about two weeks ago
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Police Using Dogs To Sniff Out Computer Memory

idji Re:Amazoing (415 comments)

lots of chemicals are used in making/etching circuit boards and then there is the tin&flux in solder. I am sure they have very clear smells.

about two weeks ago
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Air Pollution Can Disrupt Pollinating Insects By Concealing the Scent of Flowers

idji Re:Easy fix (67 comments)

http://www.honeycouncil.ca/chc...
Bees need to fly twice around the word (50,000 miles) and visit 2.6 million flowers to make 1 pound of honey.
Your robots are not coming to save us any time soon.

about a month ago
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New Chemical Process Could Make Ammonia a Practical Car Fuel

idji Re:Now I'm confused ... (380 comments)

They have just found a cheap way to crack NH2 to N2 and H2 and are excited about that in combo with simpler fuel storage and transport - they are not focusing on the energetics of H2 or NH3 generation with the Haber-Bosch process here.
The point here is that to store Hydrogen you need 10,000 psi (http://en.wikipedia.org/wiki/Hydrogen_storage#Compressed_hydrogen) and Ammonia only needs 250 psi in a plastic container (http://en.wikipedia.org/wiki/Ammonia#Storage_information).
They are looking at the following problem
H2O+Energy->H2->H2-Storage->FuelCell->Electricity+H2O
and have worked out that they can do
H2O+Energy->H2,+N2+Energy->NH3->NH3-Storage->H2 +N2 without NOx->FuelCell->Electricity +H20
and what they are excited about is that NH3 storage and transport is a known and solved problem industrially and NH3 cracking is now cheap and clean. Now someone just needs how to work out H2O->H2->NH3 using solar and the problem is solved.

There is also the other issue that a H2 leak is benign or a quick fireball and that an NH3 leak will eat the noses and lungs of everyone nearby.... http://www.wral.com/ammonia-le...

about a month ago
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Elon Musk: I'll Put a Human On Mars By 2026

idji Re:At least Elon has the right goal (275 comments)

Going to Mars won't save humanity, but working out how to live away from Earth could, even if that means learning on Mars how to live under the Earth to survive the 1450's imps, 1950's Apocalypse Godzillas and 2010's Biotech Zombies...

about a month ago
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Unicode 7.0 Released, Supporting 23 New Scripts

idji Re:Why emoji? (108 comments)

If the emoji are standardized in Unicode, then it will be easier for any kind of software to support them.

about a month ago
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Dump World's Nuclear Waste In Australia, Says Ex-PM Hawke

idji Re:Commodity of the future (213 comments)

Look at Safety Advantage #11 Destruction of existing long lived wastes in LFTR What is wrong with my periodic table?

about a month ago
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Dump World's Nuclear Waste In Australia, Says Ex-PM Hawke

idji Re:Commodity of the future (213 comments)

exactly, burn it all in the Thorium reactors to come.

about 2 months ago
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NASA's Plan To Block Light From Distant Stars To Find 'Earth 2.0'

idji Re:Wrong focus (92 comments)

NASA is focusing on research and new tech as it should and Starshade is an excellent example.
NASA shouldn't do an orbital shipyard and asteroid hauling - that is engineering - let SpaceX and Google do that in private enterprise.

about 2 months ago
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US College Students Still Aren't All That Interested In Computer Science

idji Re:I have tried (306 comments)

it's no parlour trick. For tasks like navigating down through an xml file, parsing boolean phrases like "a and (c or (d xor e)))", searching a folder system, navigating a tree, implementing Qucksort Algorithm, Towers of Hanoi, giving change with coins, etc have NO STACK OVERFLOW issues
Show me smarter ways of solving these problems.
A while loop can have a stack overflow if you forget to increment a counter. That's just bad programming - it doesn't mean a while loop is bad.

about 2 months ago
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US College Students Still Aren't All That Interested In Computer Science

idji Re:I have tried (306 comments)

In the last 16 months I ran workshops around the world for over 200 technical consultants working for IT companies. Less than 10 of them would be able to write recursive or sort functions or other problem-solving algorithms. Most of them were what I call "configurers". A massive amount of the problem-solving burden falls on me because i learnt how to program in the 1980's before the internet and code libraries appeared.

about 2 months ago
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Researchers Develop DNA GPS Tool To Accurately Trace Geographical Ancestry

idji Re:Soo... (69 comments)

You might be carrying 5 very rare genes that now have GPS coordinates of origin - this could tell you all of your origins.
And even in the very mountainous Dolomites of Northern Italy they demonstrated that Ötzi (4000+ years old) has almost the same DNA as the people living there TODAY. Some some genes can stay in the same spot for a VERY long time.

about 3 months ago
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Rand Paul Suggests Backing Bitcoin With Stocks

idji Re:Stocks? (404 comments)

Energy and matter have intrinsic value. If I had at my disposal 65 TJ of energy that is very valuable - in anyone's eyes.

about 3 months ago
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Frigid Brown Dwarf Found Only 7.2 Light-Years Away

idji Re:Stupid question from a non-astronomer (142 comments)

Your question is whether Dark Matter could be real and observed MACHOs.
The other main option is that Dark Matter could be hypothetical WIMPs
Numerous experiments have ruled out MACHOS as making up the bulk of Dark Matter. The missing mass problem is not solved by MACHOs.
At the moment the WIMPS are beating the MACHOS.
See also History of the search for Dark Matter

about 3 months ago
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Frigid Brown Dwarf Found Only 7.2 Light-Years Away

idji Re:It might be a planet (142 comments)

A planet that is ejected from a star is called a Rogue Planet and just orbits the galaxy itself.

about 3 months ago
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Facebook Data Miner Will Shock You

idji Re:And this is why.... (164 comments)

Facebook knows who your family is, where you work, who your kids are and all of their friends and teachers and everybody else you have known for the last 20 years, because they all gave Facebook and Whats App access to their entire address book. It simply doesn't matter what you did - each of your email addresses is a GUID point to you.

about 3 months ago
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Kids Can Swipe a Screen But Can't Use LEGOs

idji Re:Relevant Skills (355 comments)

15 years ago they were grumbling these kids couldn't run nor catch a ball. Horrors, what will they be saying in 2025?

about 3 months ago

Submissions

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How did the Moon move so far in one day?

idji idji writes  |  more than 5 years ago

idji (984038) writes "Saturday morning I woke up at 7am and looked out my south-facing window (48N) and saw the moon BEHIND a tree. Sunday morning I woke up at 8am and looked out my south-facing window. No surprise that the Moon was there. But what blew me away was that the moon wasn't behind the tree, it was ABOVE the tree, about 8(!) moon-diameters higher in the sky. I have studied planetary science, the orbit of Mercury and can derive Kepler's 3 Laws from F=ma on the back of an envelope but I didn't have an explanation for what I saw — I skipped that observational Astronomy class at university — too much trigonometry. Orbit of the Moon didn't help me either. Can any one out there explain how the Moon was 8 diameters higher in the school AFTER 25 hours?"
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idji idji writes  |  more than 6 years ago

idji writes "Astronomers meeting in the Czech capital have voted to strip Pluto of its status as a planet. About 2,500 were in Prague for the International Astronomical Union's (IAU) general assembly. Pluto has now been demoted to a pluton — transneptunian — kuiper belt object — whatever you want to call it. http://news.bbc.co.uk/1/hi/world/5282440.stm"

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