Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror
×

Comment Re:More religious whackjobs (Score 1) 286

It's the same reason why many of the oppose geothermal power, keeping Hawaii reliant on burning oil for most of its electricity. Also why there's opposition to even trying to redirect lava flows as most countries do when their people are threatened (with a number of successful redirects having been achieved).

Apparently Pele wants people to be ignorant of the cosmos, to destroy the climate, and to lose their dearest possessions without putting up a fight.

Comment Re:Every Damn Day (Score 1) 227

You think that because you think they actually are interested in you.

They aren't. They're interested in justifying an H1B visa. So they send out emails to people they know are not interested, and place conditions that they know will cause the "candidate" to reject them (ie. It's not where you live and they refuse to pay for travel to a required, on-site interview).

Do that to 100 people, and you can go claim you need an H1B because you could not find someone already in the US to take the job.

Comment "Strawmen" -- Meh (Score 1) 286

Wow. Give us what we want or we will fuck you even harder.

Are you in the habit of erecting obvious strawmen, or was this particular bit of off-target re-interpretation just special for me?

Although it does apply to this group -- they're telling the government, "give us what we want, or we'll try to hose some good science" So perhaps your post wasn't a strawman after all. Perhaps you're just confused as to who the culprit is in this situation.

Comment What tripe (Score 2) 628

Many schools ban bare-shoulder outfits, anyway.

That's like saying "many people try to force others into doing stupid things, so anything I want to try to force you into is good, right and holy."

Some dumb-ass school rule stands as absolutely no legitimate justification for pop-culture repression of personal and consensual choice.

Comment "Hawaiians" -- Meh (Score 1) 286

All this particular interest group is doing by going against good science is making is less likely they'll get what they want.

The world goes the way the most powerful choose it shall go. So it has ever been, and likely will continue to go for the foreseeable future. Going against the good things the powerful do is just one more very efficient way to get them to consider your desires irrelevant -- a really poor way of trying to get the powerful to use said power in your favor.

These people are not "natives", either. They didn't evolve there. They're immigrants and descendants of immigrants. just like all of us on the US mainland, basically anywhere but (probably) Africa. Perhaps what you meant to say was "descendents of the earliest known settlers." Or perhaps "invaders" is more accurate.

Another thought along the lines of the powerful do what the powerful want to do... do you think the earliest of these folks took the time to see if the other local life forms wanted them and their changes on and around these islands? Did the fish want to be speared, for instance?

It's all a matter of perspective and power. These people seem to have neither.

Submission + - How Silicon Valley got that way -- and why it will continue to rule. (medium.com)

An anonymous reader writes: Lots of places want to be "the next Silicon Valley." But the Valley's top historian looks back (even talks to Steve Jobs about his respect for the past!) to explain why SV is unique. While there are threats to continued dominance, she thinks its just too hard for another region to challenge SV's supremacy.

Comment Re:This again? (Score 1) 480

I've seen plenty of work on accelerator-drive heavy isotope reactors but nothing for light isotope reactors like lithium. Accelerator driven heavy isotope reactors still deal with many of the problems of conventional fission reactors - they're greatly improved in many regards, but still problematic (you still have some plutonium, you still have some fuel availability/cost limitations, you still have some long-lived waste, you still have some harder to shield radiation, you still have a wide range of daughter products making corrosion control more challenging, etc - just not to the degree of a regular fission reactor). A light isotope reactor using lithium would virtually eliminate all of these problems. And it has a higher burnup ratio, which is of course critical for space uses.

And while everything I've seen about past improvements in accelerator efficiencies and spallation process improvements, and what's being worked on now, suggests no limit any time soon on neutron production efficiencies - at least that's how it looks from the papers I've read. Plus, even if efficiencies couldn't be improved any further (there's not that much further one needs to go), one could hybridize a heavy isotope and light isotope reactor, using a heavy isotope target as a neutron multiplier to bombard the lithium. You'd require significantly reduced quantities of heavy isotopes relative to a pure heavy isotope reactor, and most of the energy from the lithium side could be as mentioned captured without Carnot losses, which is a big bonus. Any non-thermalized neutrons of sufficient energy would produce tritium as a byproduct, which of course would be a value-added product - in fact, given that the tritium-breeding reaction with 7Li and a high energy neutron yields a lower-energy neutron, the thermalization could potentially be done via tritium breeding in the first place. And tritium is a valuable product whether one has interest in D-T fusion or not.

I just think it's weird that I've not come across any work on a lithium-based accelerator-driven spallation reactor, and was just wondering if there's a reason for that. It certainly looks appealing to my non-expert eyes. I mean, it looks even cleaner and more fuel-available than D-T fusion, and looks closer to being viable on a full-system perspective. Versus accelerator-driven heavy isotope fission you get less power per neutron (about a quarter as much), of course, even accounting for Carnot losses in the former - but that's not what matters. Cost is what matters, and if you're eliminating the use of super-expensive fuel, not producing any costly-to-manage waste, have no incident radiation, no proliferation concerns, etc, you're completely changing the cost picture - without even considering the possible joint production of saleable tritium.

Comment Re:FCC shouldn't regulate this - it's FTC's job. (Score 1) 438

Good. Now we've gone from "they're all scum" to "some of them (possibly including Rand Paul") are good and trying but the Repubican machine and its operators will block them."

At this point we're mostly on the same page.

Ron Paul is clearly one of those good guys. And the Neocons controlling the R party machine (one of the four major factions) steamrollered him and his supporters (sometimes violently), and changed the rules to make it even harder for a grass roots uprising to displace them.

Two debates are going on right now. One is between working through the R party (is it salvagable?) or coming in with a "third" party - either an existing one or a new one (is that doable or do the big two have too much of a lock?)

The other is whether Rand is a sellout to the Neocons or if he's just more savvy than his dad and trying to look non-threatening to them in order to get the nomination. Andrew Napolitano, who knows him personally, says he knows him to be a genuine liberty advocate, and I trust A. N. on this subject.

Comment Re:Point proved (Score 0) 301

I own a 2001 Honda Insight hybrid modified to be a PHEV and plugged in nightly to charge on geothermal power.... and a Ford Ranger ;) The "why" is obvious, because I have regular needs to carry big heavy things, now that I own land in the countryside. Back when I had no such need... I didn't own any such vehicle.

I guess it's hard for him to imagine that a woman would have a need to carry large and/or heavy items?

Comment Re:this is science, so you have to ask... (Score 4, Informative) 301

And the crazy thing is, they did consult with male colleagues before publishing. The reviewer just assumed that because two women submitted a paper with a conclusion that he disagreed with, that it's specifically because they're women "making ideologically biased assumptions" who refuse to talk to men.

Comment Re:This again? (Score 0) 480

Oh hey, since we've got (assumedly) a lot of physics nerds on this thread, and because my mind hasn't suddenly stopped being curious about random topics even though I grew old: here's one of my more recent things that left me with unanswered questions:

One of the commonly cited tritium-generating reactions is 7Li+n(>2.466 MeV) -> 4He + 3H. But is 7Li not also capable of transmutation to 8Li via slow neutron capture? If so would that not yield a 16.004 MeV beta to 8Be, and then immediately into 2 alphas with an additional energy of 0.092 MeV? If so, is there not potential for a future nuclear reactor? Spallation currently yields neutrons for about 25MeV each. If one could cut that in half or less - which I don't see any laws of physics in the way, just improvements in accelerator efficiencies and the spallation process - could this not yield a net positive, using direct deceleration/capture of the beta to generate power without having to suffer Carnot losses? And if so, would that not be a very desireable reactor - nonproliferative, abundant fuel, harmless waste, high ratio of fuel to energy conversion, direct spacecraft thrust possibilities, etc? Or am I totally off base here?

Comment Re:This again? (Score 1) 480

Haha, my concept as a child was to have a buoyant container on wheels in a tube full of water that would rise up, roll down a ramp on the other side, and re-enter the tube through an airlock on the bottom.

Wish my dad had taken the time to tell me why it wouldn't work rather than just saying "perpetual motion is impossible".

Slashdot Top Deals

The cost of feathers has risen, even down is up!

Working...