Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror

Comment Re:Generation ship (Score 1) 174

You said it yourself: the heritability is 0.8. When you start with people at the top of the scale, the second generation won't be average but they also won't be as smart as their parents. The third generation will be dumber still.

Yes, after multiple generations they eventually reach a new stability point with higher than the original average intelligence of the human race. But that new mean is far below the intelligence of the original group that set out, and includes a significant number of individuals who are not mentally competent to maintain and operate a spaceship.

Comment Generation ship (Score 1) 174

The classic problem with a generation ship isn't engineering, it's biological reversion to the mean.

You pull 400 crew from the brightest, best qualified of the 8 billion people on Earth. Their children will be smarter than the average human, but not nearly as smart as their parents. And the third generation will be dumber still as the average intelligence and competence ebbs toward the overall human average.

Can a team of essentially random people plucked off the street keep an interstellar spaceship in good working order and successfully deal with unexpected crises? It seems unlikely. Our best and brightest could, but they'll only be around for the first half century.

Submission + - I ordered vintage tech. Ebay deliberately destroyed it (ebay.com)

ayjaym writes: The HP65. The world's first hand-held programmable calculator. One flew on the Apollo-Soyuz missions as a backup to the main computer system.
So when I saw one listed on eBay, I immediately purchased it from the US seller. It was to be dispatched via ebay's Global Fulfilment Program. From previous experience I knew this was a tortuous process; items can take a month to travel from the US to the UK.
What I didn't know is that there was a random chance of my item being deliberately destroyed by eBay. One moment it was at the 'inspection' stage, prior to being shipped, and then, just like that — like the 'lifesystems terminated' chilling message in 2001 — it was gone. "Item failed inspection". "Item liquidated".
I contacted eBay support. No, we can't tell you why. No, both parties will be refunded. No, the item won't be returned to the seller. It will be destroyed.
Why?. Well — who knows. There were no batteries, no toxic chemicals. Just a calculator. An irreplaceable piece of vintage tech, deliberately destroyed for reasons utterly unknown.
And this isn't an isolated incident. The opaque 'inspection' step apparently quite often triggers random rejection, usually with the destruction of the item. Antiques, coins, you name it. Nobody knows and few care because both parties get their money back. Except — an irreplaceable piece of tech history has now been destroyed, and I feel responsible. All I wanted to do was restore it, and now I've been the agent of its destruction. It's heartbreaking.

Comment Re:Salmon (Score 1) 48

The C code itself isn't obfuscated. The problem is that your text editor isn't showing you the code.

If you look at the C code in a plain ASCII text editor, you'll see everything. But a text editor that interprets UTF-8 hides a bunch of stuff from you.

If you happen to be viewing the entry in VIM, use ":set encoding=latin1" to see what's really going on.

Comment International law applies. (Score 1) 2

Like ships and aircraft, spacecraft fly a country's flag. Where those countries fail to assert sufficient control over spacecraft operations, they are subject to their neighbors' displeasure. But first, someone has to do something sufficiently displeasurable and escape their own country's legal ire.

Comment Re:The climate changes have been obvious (Score 1) 186

There's no Maui water rationing "due to a drought." If there's water rationing, it's because the natives have obstructed the construction of sufficient aqueduct capacity to match the increase in population. Plenty of fresh water falls in the rain forest and uselessly empties into the sea. You just have to pipe it to where the people live.

Comment Will Quantum Computing work as predicted? (Score 2) 35

All of this presumes that Quantum Computers will work as predicted. That's like assuming that real computers work just like Turing Machines. They do not. Not only do real computers work differently, no real computer can fully implement a Turing Machine because Turing Machines have infinite memory. While most algorithms proven on a Turning Machine can in fact be usefully implemented on a real computer, it's not universal.

If real Quantum Computers don't match theoretical Quantum Computers, and I think it unlikely that they will, then it's not yet clear which algorithms will work on them and which require assumptions that won't end up being true.

Slashdot Top Deals

In case of injury notify your superior immediately. He'll kiss it and make it better.

Working...