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+ - Nightfall: Can Kalgash Exist?->

Submitted by jIyajbe
jIyajbe (662197) writes "Two researchers from the Indian Institute of Astrophysics investigate the imaginary world of Kalgash, a planetary system based on the novel ‘Nightfall’ (Asimov & Silverberg, 1991). From the arXiv paper:

"The system consists of a planet, a moon and an astonishing six suns. The six stars cause the wider universe to be invisible to the inhabitants of the planet. The author explores the consequences of an eclipse and the resulting darkness which the Kalgash people experience for the first time. Our task is to verify if this system is feasible, from the duration of the eclipse, the ‘invisibility’ of the universe to the complex orbital dynamics."

Their conclusion?

"We have explored several aspects of Asimov’s novel. We have found that the suns, especially Dovim are bright enough to blot out the stars. Kalgash 2 can eclipse Dovim for a period of 9 hours. We also tested one possible star configuration and after running some simulations, we found that the system is possible for short periods of time."

"

Link to Original Source

Comment: Re:Streaming vs downloading (Score 1) 339

by jIyajbe (#47123865) Attached to: The Energy Saved By Ditching DVDs Could Power 200,000 Homes

And in fact, when I buy a movie via iTunes, I have the choice of streaming it directly from Apple servers, or downloading it to my computer--or both. I generally choose to stream directly, because I'm lucky enough to have an internet connection that is both fast and reliable, and Apple's servers have been very reliable (not 100%, but close enough), so I don't have to use up my hard drive space.

But, if I choose to, I can have the full HD version on my local hard drive, and so can watch any movie I buy whether or not I have an internet connection.

(N.B.: I know I sound like an Apple fanboi (TM), but it's the only online service I've tried.)

Comment: Re:Avoiding Re-Buying (Score 0) 339

by jIyajbe (#47123679) Attached to: The Energy Saved By Ditching DVDs Could Power 200,000 Homes

Well, Apple didn't make me pay for the upgrade from Mountain Lion to Mavericks...

They didn't make me pay for the upgrade from iWork '09 to iWork 2013...

They didn't make me pay for some music I bought that was re-issued as remastered shortly after I bought it...

However, you're quite right about having to buy new equipment. That would be true regardless of whether I stream or use physical discs, though.

Comment: Only Relevant to Projection (Score 4, Informative) 261

by jIyajbe (#47123581) Attached to: Curved TVs Nothing But a Gimmick

In a movie theater, which uses projection, the curved screen is to alleviate the pincushion effect (http://en.wikipedia.org/wiki/Pincushion_distortion) created by the anamorphic lens (http://en.wikipedia.org/wiki/Anamorphic_lens) that the theater uses. This is utterly irrelevant to the image created by a monitor TV.

In short, yes; pure marketing BS.

Comment: Avoiding Re-Buying (Score 0) 339

by jIyajbe (#47123303) Attached to: The Energy Saved By Ditching DVDs Could Power 200,000 Homes

I decided to move completely to streaming (via iTunes), rather than buying discs. Two advantages:

1) When the next format comes out, I don't have to re-purchase the same movie yet again (VHS --> DVD --> Blu-ray --> 4K --> ???)

2) Less stuff in my house. I am trying to downsize, and I want my next house to be less than 1000 ft^2. The less stuff I have to store, the better.

+ - The Surprisingly Simple Way Egyptians Moved Massive Pyramid Stones->

Submitted by jIyajbe
jIyajbe (662197) writes "Few have traveled to the pyramids of Egypt and not wondered how an ancient civilization without modern technology could have constructed structures so large they can be viewed from space. Some have theorized they were built inside out..

On the flakier side, some say aliens did it.

Perhaps the most confounding mystery of all involves how incredibly large stones made their way to the middle of the desert without massive mechanical assistance. No camel, even the Egyptian kind, is that strong.

The truth, researchers at the University of Amsterdam announced this week in a study published in the journal Physical Review Letters, may actually be quite simple. It has long been believed that Egyptians used wooden sleds to haul the stone, but until now it hasn’t been entirely understood how they overcame the problem of friction. It amounts to nothing more, scientists say, than a "clever trick."

They likely wet the sand."

Link to Original Source

Comment: Re:Faithful (Score 5, Informative) 283

by jIyajbe (#45217293) Attached to: 5-Year Mission Continues After 45-Year Hiatus

Baseline: I am a trekker; I really, really like all of Star Trek, old and new.

For all that it was the genesis of all things Trek, TOS is terribly painful to watch these days. Not an auspicious starting point for a fan-made series.

What's funny is that they managed to write a story that was the same quality as most of TOS stories--mostly low; the actors reproduced the acting "skills" of the originals (especially Kirk! Wow!); and it was just as cheesy as the original show. I fully expected it to be hard to watch.

But it wasn't! It was a labor of love, but they managed to go above that, and actually make an enjoyable episode, one that can hold its head up with the all but the best TOS episodes.

Hats off to them all, and I think I'll open my wallet.

Comment: Re:Apple OS Upgrade Expectations (OSX & iOS) (Score 1) 488

by jIyajbe (#44915975) Attached to: Ask Slashdot: Is iOS 7 Slow?

I hate to be Captain Obvious here, but isn't it true in general that the more advanced the operating system, the better (newer) the hardware it needs to run well? Nobody who values their time or sanity tries to run Windows 7 on a Pentium Pro computer.

So yeah, older iPhones will run the new iOS more slowly than they ran the older iOS.

Comment: Re:No thanks (Score 1) 128

by jIyajbe (#42599677) Attached to: Facebook Announces Social Search Tools

With respect, if you think Google+ is moribund, then you haven't looked at it lately, or you haven't looked at it deeply enough. Among the active G+ members are the Large Hadron Collider (they hold live Q&A sessions on G+ frequently), MIT, American Physical Society, Cmdr. Chris Hadfield (commander of the International Space Station), Wil Wheaton...Active communities include a Python community, Android, IOS, Science, Physics, Social Science, Medical...Popular culture communities include Doctor Who, Star Trek, Red Dwarf...The list is very, very long.

In short, go check it out.

(I read somewhere, probably on Slashdot, that "Twitter is for following people you don't know; Facebook is for following people you used to know; Google+ is for following people you should know.")

Comment: Changed Your Opinion? (Score 1) 2987

by jIyajbe (#42290549) Attached to: 27 Reported Killed In Connecticut Elementary School Shooting

I have a question for the Slashdot community: Does this shooting alter your opinion on the issue of gun ownership rights vs. gun control laws? Even a little, in either direction?

Please note: My question is NOT, what is your opinion now; rather, it is, how much did your opinion CHANGE?

We have a large enough community here that I think the numbers will be statistically meaningful.

Thanks, all.

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