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


Forgot your password?

Comment Re:Landfill?! (Score 1) 34

Until it crushes. Not all aerogels are strong, and in the picture we can see the guy bending it. And even the strength of "strong" aerogels is often overstated - they're high strength for their weight, but not for their volume.

Comment Re:Cheaper? (Score 2) 34

I fail to see how it's at all like composite building - it's a moulded product. Also note: frozen and freeze dried for two days. So if you want to make boats out of the stuff, you have to amortize in the cost of two days (per unit) usage of a thermally-regulated vacuum chamber large enough to put a boat in, which is a pretty expensive piece of kit.

Also, how long is the sonication process?

Making boats or surfboards out of the stuff sounds kind of pointless. As you already clearly know, the ideal boat hull is a twinwall composite, where you have composite layers of high tensile fabric bonded to either side of a lightweight foam or honeycomb core - the latter existing primarily to space the former out. If you replace the inner layer with aerogel, you're only cutting out the weight of the foam or honeycomb - and foams and honeycombs are already quite light. I mean, you'd save some weight... but enough to justify the cost and difficulty?

I guess if you're going really upmarket... after all, some people buy Monster cables ;)

Comment Re:fire! (Score 1) 34

Aerogel is of course nothing at all like loose-fill cellulose insulation. But no, it should not pose a fire risk either. Depending on the type, aerogels are generally considered either fire retardant or non-flammable; even if they're made of something that "burns" on a macroscopic level, there's so little "something" there to burn that the flame barrier properties that they provide generally well outweighs the heat output of their own combustion.

Comment Re: Too late (Score 1) 267

Republicans aren't "free marke"t or "freedom" people - they're theocratic corporatists. You might be thinking of libertarians - they're more of the "do whatever the fuck you want unless you're going to hurt someone else" mentality. They might think that an SJW company would run itself into the ground in pretty short order, but whatever - they can destroy their company if they feel like it.

Comment Re:The basic question is answered...but still... (Score 1) 476

1) Government funds your study and provides your grant
2) Government wants a particular result from your study
3) Government does not renew your grant when the study does not prove what they set out to prove


1) Private industry funds your study and provides your grant
2) Private industry wants a particular result from your study
3) Private industry does not renew your grant when the study does not prove what they set out to prove
4) Private industry tries to censor any study that has results that embarrass private industry

Comment Re:Insanity (Score 1) 571

If the wind is too high or the surface too rough it's the cyclists job NOT TO RIDE THERE.

Right. Which is why it's then a problem having cyclists who want to travel at a reasonable speed, but still a speed slower than motor vehicles can achieve, sharing the same main traffic lane. Which brings me back to my main point: substandard facilities like nothing-but-a-paint-job cycle lanes are potentially dangerous, and we need proper, mode-appropriate facilities for all classes of road user. Which in turn comes back to the original point of the discussion: sometimes we're better off without just slapping paint on the road if all it does is create dubious expectations and a false sense of security.

Comment Re:like an electric toothbrush? (Score 1) 60

How about ZERO inefficiency by just plugging your damn car in?

There's still loss from the cable, and the transformer that's in the charging unit - whether in the car or in the exterior charger. You can get rid of that transformer when you're using induction.

As for the danger, at the voltages and amps we're looking at, it actually IS dangerous if it wasn't for that said cables are very much NOT simple, containing sensors to limit voltage potential to what's needed to detect a connection. Something like 1V until it's done a handshake, then it can ramp up to 400V or more.

Slashdot Top Deals

10.0 times 0.1 is hardly ever 1.0.