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Google's Project Loon Can Now Launch Up To 20 Balloons Per Day, Fly 10x Longer

idji Is this a responsible use of Helium? (98 comments)

Surely we should only be using helium in a reusable way.

9 hours ago

Comet Probe Philae To Deploy Drill As Battery Life Wanes

idji Re:Solar? (223 comments)

Europe wouldn't allow research and dev on such nuclear tech. (they asked this question in a Google hangout today)

about a week ago

333 Km/h Rocket-Powered Bicycle Sets New Speed Record

idji Re:If I strap a rocket to my back (51 comments)

then you wouldn't really be around anymore to claim anything, would you?

about two weeks ago

Pope Francis Declares Evolution and Big Bang Theory Are Right

idji Re:Tip of the iceberg (669 comments)

What a load of Mormon-like nonsense!!! They like to think of Jesus as a space traveller. You said nothing valuable here, just read your Mormon-like beliefs into the text where it suited you, and ignored everything else (like divine sea monsters in Genesis 1:21 that translators gloss over with "large sea creatures", "big fish" or "whales").

about three weeks ago

Creationism Conference at Michigan State University Stirs Unease

idji Re:It makes you uneasy? (1007 comments)

Exactly the same thing happened at my university in 1988. This is not news. The only thing that is news is that they are still talking about Hitler after 30 years.

about a month ago

IBM Solar Concentrator Can Produce12kW/day, Clean Water, and AC

idji it has active cooling. (268 comments)

so a pump failure would bring a sever meltdown of the chips.

about 2 months ago

IBM Solar Concentrator Can Produce12kW/day, Clean Water, and AC

idji Re:12kW/day? (268 comments)

I think they meant "up to a maximum of 12 kW of electricity power and 20 kW of heat"

about 2 months ago

Ask Slashdot: How To Keep Students' Passwords Secure?

idji Here's a simple trick I taught my kids (191 comments)

"The dog chased 3 chickens around the house."=Tdc3cath. "I use Google to write emails to Grandma."=IuGtwetG.

about 2 months ago

Physicist Claims Black Holes Mathematically Don't Exist

idji Re:Hmmm ... (356 comments)

they are not denying that such supermassive black objects exist, they are questioning whether they are singularity "holes" with an event horizon.

about 2 months ago

Ask Slashdot: How To Pick Up Astronomy and Physics As an Adult?

idji Local Library (234 comments)

Go to your local library and look at that 520's for Astronomy and the 530's for Physics. I guarantee you will find a beautiful modern book at esactly your level there.

about 2 months ago

Brown Dwarf With Water Clouds Tentatively Detected Just 7 Light-Years From Earth

idji Re:Occam's razor. (85 comments)

No, Astronomers have asked the WIMP vs MACHO question for many decades now, and WIMPs are winning.

Occam's Razor has always been applied here, and that is why it is still an open question, because the simple and obvious answer (MACHO) is not working and extraordinary evidence is being found, eg the Physic's Nobel Prize 2011.

This article is not about MACHO vs WIMP. It says they found a nearby MACHO with water vapor, and that is very interesting for life questions, not dark matter questions.

about 3 months ago

Google Wants To Test Driverless Cars In a Simulation

idji Re:Simulations are limited by imagination (173 comments)

You are right that real life is far more creative, but that is not the point being argued here. The point here is that simulation is a better testing environment than a test track. The test track will have much less creative scenarios than simulation because they are so much harder to stage. A test track will not test scenarios that people didn't think of. The simulator is a much better environment to test dog+stop sign+rain - try doing that on a track. Put some creative people in the simulator and they'll also test elephant+storm+headlight failure.

about 2 months ago

The Quiet Before the Next IT Revolution

idji Wrong (145 comments)

No, you IT people are no longer the great revolutionists - your time is gone. You are now just plumbers, who need to fix the infrastructure when it are broken. Other than that, we don't want to hear from you, and we certainly don't want your veto on our business decisions - that is why a lot of us business people use the cloud, because the cloud doesn't say "can't work, takes X months, and I need X M$ to set it up", but is running tomorrow out of operational budget.

about 3 months ago

The Technologies Changing What It Means To Be a Programmer

idji Re:Another Silver Bullet? I don't think so... (294 comments)

The most useful programming skills I learnt were in 1982 on the Sinclair ZX Spectrum. Nothing I learnt then has become irrelevant, just the languages changed. I give programming courses and am amazed how 21st century programmers are missing the basics and cannot write algorithms.

about 3 months ago



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?"

idji idji writes  |  more than 8 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."


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