Want to read Slashdot from your mobile device? Point it at m.slashdot.org and keep reading!

 



Forgot your password?
typodupeerror
×

Comment Re:Pot, meet kettle (Score 1) 236

Global warming is a sloooooooooooooooooow process

Not necessarily. Greenland ice core records show that in the past the planet has seen temperature shifts of up to 7 C in as little as 30 years. 7 C is huge. It's like transporting Moscow to Rome. Of course, we have no idea what caused such rapid changes in the past. It wasn't CO2 levels, or particulates.

Comment Re:Math (Score 1) 236

i would not be surprised if humans died off within a couple centuries after that.

I would. If one or more isolated populations managed to survive more than a couple of generations after the event, I think it's highly likely that they'd continue to survive indefinitely. The worst of the changes would be past, and they'd clearly have learned how to survive in the new environment, else they'd have died sooner.

Human intelligence makes us highly adaptable, as evidenced by the extraordinary diversity of environments in which we live, and lived even before the advent of modern technology. Humans who lack the necessary knowledge of how to survive in a particular environment are at severe risk of death any place on the planet, but if they manage to survive for even a year or two, odds are that they'll have learned enough to be able to extend that time almost indefinitely.

Comment cheap BLU phones (Score 2) 313

I've been getting a bunch of BLU phones for the kids for about $20 - $30 a pop.
http://www.amazon.com/BLU-Unlo...

They're by no means nice phones, but they have a good feature set, and we haven't had any problems with them that weren't caused by dropping them into puddles or sending them on a ride through the laundry machine.

BLU also has a slightly larger one with a full Blackberry-like keyboard for texting that also has a broadcast TV receiver instead of just FM radio.

Comment Re:Trolling? (Score 2) 236

Er, just trolling for mod points, and I guess I know my audience for the most part... I was really just looking for a nice place to link to that funny image, and your post sounded smart (though TBH I didn't really understand what position you were arguing for or against, but I agree with the statements you made).

But just to explain my AGW analogy... should we be worried about asteroids enough to spend money on asteroid interceptors, even though any kind of payoff is likely only once every 70,000 years or so? Should we be worried about climate change enough to spend money on trying to cram more people onto Earth, or just let the natural cycles of mass extinctions and famine run its course?

The fine article is somewhat silly, because first they complain about how bad at statistics people are, but then go through the math that the odds of anyone dying due to asteroids are 1 - in 70 million per year.

assuming our world’s population remains level at 7 billion indefinitely into the future

which is
1. a bit ridiculous that the population will hold steady at 7 billion the forseeable future, not that it matters because humans have difficulty relating to any population above a couple hundred.
2. over enough millennia, even with those odds, we'll see definitely see something. Probably not in our lifetimes, but likely on a civilization scale of 10,000 years.
3. Yes, TFA mentions that most of the solar system debris has already been absorbed by Jupiter and the like, but seems to ignore some other million-year scale cycles for encountering space debris http://www.dailygalaxy.com/my_...

Are people fear-mongering? Definitely. Is any effort we make to tackle the miniscule risk of asteroid impacts or climate change wasted? No. Are historians in the distant future going to look back on our culture and and say "silly fools, they wasted so much time and effort worrying about X that they didn't notice the real issues piling up to destroy their civilization" no matter what we do? Hell yes.

Submission + - Coral islands defy sea level rise

schwit1 writes: Despite having some of the highest rates of sea level rise in the past century, the 29 islands of Funafuti Atoll in the Pacific show no signs of sinking.

Despite the magnitude of this rise, no islands have been lost, the majority have enlarged, and there has been a 7.3% increase in net island area over the past century (A.D. 1897-2013). There is no evidence of heightened erosion over the past half-century as sea-level rise accelerated. Reef islands in Funafuti continually adjust their size, shape, and position in response to variations in boundary conditions, including storms, sediment supply, as well as sea level.

Be aware as well that the cause of the rise in sea level here is not clearly understood. It could be the global warming we have seen since the end of the Little Ice Age of the 1600s, or other more complex factors.

Comment Re:Mostly wrong (Score 3, Insightful) 236

Yeah, large, mass-extinction asteroids are only a problem every 70 million years.

By that logic, why even bother worrying about AGW, since even by the worst predictions it won't have any horrible effects for the next 100 years or so. So just sit back, relax, and enjoy life! .... there's nothing that could possibly happen that Earth wouldn't completely recover from in a couple million years.

http://weknowmemes.com/wp-cont...

Comment Re:Sudden? (Score 4, Interesting) 268

Politics are not Pro- or Anti-Science. It is weather the science is political useful for them or not. Otherwise they will be happy putting their head in the sand.

This. If you know anything about lawyers and law, the first tenet is NEVER ADMIT FAULT. No good can come of it. People might then expect you to pay for damages or whatever.

Environmentalists make the mistake thinking that conservatives are stupid. That is not the case. The only thing they care about is that they will not have to pay for or be part of the solution. Any time you spend trying to convince them otherwise is wasted.

The other bit is that politics is never proactive, always reactionary. No environmental protection or anti-pollution law was ever passed until something was already FUBAR, be it due to the London yellow fog, or smog over LA, holes in the ozone layer, or Chinese urban centers shutting down due to respiratory issues. The politicians will maybe finally get around to doing something substantial about AGW after there's a refugee crises from low-lying areas, like the Netherlands, Bangladesh, Louisiana, Florida, etc. Chances are, they still won't blame AGW, since it'll be sea swell from a hurricane/typhoon that does those population centers in, but at some point they'll get tired of throwing money at those places to rebuild. Fortunately there are already a lot of migrant refugee boats in the Mediterranean and Andaman Sea for other reasons, so we're already slowly building a framework for dealing with these kinds of things.

Comment Filibuster? (Score 1) 385

I still can't get my head around this; a guy is allowed to hold off a vote on legislation by talking, because in the US there is a rule that makes it impossible to do what would happen in other, democratic nations, namely that a couple of bailiffs would gently lead him away until he regained his sense. In some cases this can mean that a vote cannot be held before a deadline, so in this situation a single bully can veto legislation that the majority wishes to pass. And this is applauded as a courageous act of ... what? And the defence of this practice is, no doubt, "freedom of speech"; funny how "freedom" so often mean "your right to do as you please", not "my right to stand up and give you a well deserved slap", figuratively speaking.

The real reason that this kind of idiocy is allowed, is not that it is about an important freedom, but simply that is does not matter in the bigger picture. It looks spectacular, if only because it is spectacularly boring, and it gives people the illusion that their freedoms are real, but the deals have already been done in the board rooms, where the real power lies.

Comment Re:Harder: self-stabilizing parachute, or balance (Score 1) 496

But it does require extra fuel. I'd have expected that fuel to be more than the weight of a parachute system, though perhaps not: it would be lowering a mostly-empty tin can.

I imagine that it's a bonus to be able to have that kind of precision on your rocket engines: if you can get them down, then it may provide advantages in going up. Certainly it's nice that you've proven that kind of control.

Comment In particular, NO redundancy. Reliability drops. (Score 5, Informative) 226

Losing data goes with the territory if you're going to use RAID 0.

In particular, RAID 0 combines disks with no redundancy. It's JUST about capacity and speed, striping the data across several drives on several controllers, so it comes at you faster when you read it and gets shoved out faster when you write it. RAID 0 doesn't even have a parity disk to allow you to recover from failure of one drive or loss of one sector.

That means the failure rate is WORSE than that of an individual disk. If any of the combined disks fails, the total array fails.

(Of course it's still worse if a software bug injects additional failures. B-b But don't assume, because "there's a RAID 0 corruption bug", that there is ANY problem with the similarly-named, but utterly distinct, higher-level RAID configurations which are directed toward reliability, rather than ONLY raw speed and capacity.)

Submission + - Rand Paul wraps up NSA "filibuster" after 10 hours (cbsnews.com)

mpicpp writes: After standing on the Senate floor for more than 10 hours in protest of the National Security Agency's sweeping surveillance programs, Sen. Rand Paul, R-Kentucky, wrapped up his so-called "filibuster" just after Midnight on Thursday morning.

NSA illegal spying and data collection of innocent Americans must end. Thank you all for standing with me. #StandwithRand

— Dr. Rand Paul (@RandPaul) May 21, 2015
The senator and 2016 presidential candidate staged the talkathon ahead of the Senate's consideration of legislation to extend the NSA's authority to collect phone records in bulk. The controversial surveillance program — which has been deemed illegal by one federal court — is supposedly authorized by Section 215 of the Patriot Act. That section of the law is set to expire on June 1, giving Congress little time to renew it.

Paul started his "filibuster" against an extension of the Patriot Act on Wednesday afternoon, even though the Senate was actually in the middle of debate time on an entirely different issue — trade authority. Paul's efforts likely slowed down Senate business — lawmakers are trying to finish a few important bills before taking off for a weeklong recess — but the Senate is still expected to take up legislation to deal with the expiring NSA program.

Submission + - Gravitational anomalies beneath mountains point to isostasy of Earth's crust

StartsWithABang writes: Imagine you wanted to know what your acceleration was anywhere on Earth; imagine that simply saying “9.81 m/s^2" wasn’t good enough. What would you need to account for? Sure, there are the obvious things: the Earth’s rotation and its various altitudes and different points. Surely, the farther away you are from Earth’s center, the less your acceleration’s going to be. But what might come as a surprise is that if you went up to the peak of the highest mountains, not only would the acceleration due to gravity be its lowest, but there’d also be less mass beneath your feet than at any other location.

Slashdot Top Deals

UNIX is hot. It's more than hot. It's steaming. It's quicksilver lightning with a laserbeam kicker. -- Michael Jay Tucker

Working...