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

 



Forgot your password?
typodupeerror
Check out the new SourceForge HTML5 internet speed test! No Flash necessary and runs on all devices. ×

Comment Re:This simply means we're succeeding. (Score 1) 185

Finally, you can't shave *that* much weight off the car even if you stopped worrying about crashworthiness altogether; you can only make a steel box for 4/5 people so light, and still make it ride nicely, not be noisy inside, have comfortable seats, be able to fit people over 6' tall, etc.

As a first step you could roll back vehicle weights to what they were 40 years ago. You can also shift from steel to lighter materials, and you can eliminate the entire engine compartment (using small hub motors instead) so you can simply chop away much of the existing vehicle. Further, in an autonomous-vehicle world, it seems very likely that individual vehicle ownership will largely become a thing of the past, so you wouldn't have to have a box for 4/5 people except on the occasions you actually have to transport 4/5 people. Of course, the smaller you make the vehicle the less surface you have for solar panels, unless you have something like a highly-streamlined "solar umbrella" which is larger than the vehicle.

As for solar panels, again, no, it's completely impossible. At highway speeds, you need tens of horsepower to overcome air resistance.

Depends on streamlining, and on what "useful speed" means (you said highway speed, not me -- the solar challenge vehicles go much faster than bicycles but not highway speeds), and on how much you can rely on batteries. I know I said "from on-board solar panels" but didn't mean to preclude the idea that the vehicle also has batteries. If the vehicle is parked in sunlight a significant portion of each day to charge the batteries, and it's very light and has very low air and rolling resistance... it may be possible that it can operate usefully without charging from an external source. Or perhaps just without very much external charging.

Also, you're implicitly assuming that the vehicle must overcome air resistance by itself. That needn't be true with autonomous vehicles at highway speeds, which could close up into big trains drafting off of one another. Perhaps the vehicles in the train could even join electrically or physically, so that the lead and trail vehicles don't have to draw down their batteries to maintain speed.

There are options, and I don't think the possibility should be dismissed out of hand. It's a stretch, certainly.

Comment Re:Don't agree with the conclusion .... (Score 1) 185

Electric cars are a fad. The biggest problem is what do you do with all the batteries? Sure you can recycle them, but they will all eventually die. Then what..?

Among other things, EV batteries are going to have a long life as home electricity storage batteries. After a decade or so of use in a vehicle, a battery will have lost ~30% of its capacity. That sucks because it means you have a lot of dead weight to haul around. But it's not nearly as much of a concern to have it parked in the corner of your garage or basement. A couple of old EV batteries would be fantastic for time shifting rooftop solar production to match home consumption. And in that usage model, you should be able to get several more decades of use out of a battery.

And then, recycling... which provides access to high-value raw materials much less expensively than mining.

Comment Re:Don't agree with the conclusion .... (Score 1) 185

High fuel prices punish the people who are already struggling, on tight budgets. If they need to drive a vehicle for any kind of delivery or taxi job (Uber, Lyft, etc.) - it means their costs go up, because they can't just "drive less".

That doesn't mean it shouldn't be done, it just means that it shouldn't be done too quickly or without warning. People can adapt, by moving where they live, by relocating businesses, by switching to telecommuting, by carpooling, using mass transit (which may require transit buildout) etc. (and taxis can simply raise their prices to account for the higher fuel costs -- or switch to electrics). The key is to give people time to adapt, and let them know that they need to.

IMO, we should implement a schedule of federal fuel tax increases. The increases should start very gently, but then get steeper, much steeper, and everyone should know they're coming well in advance. And the taxes collected should be invested in renewable and mass transportation.

Comment Re:This simply means we're succeeding. (Score 1) 185

You can't, unless you're proposing to have vehicles that can't go faster than bicycle speed. The size and weight of modern cars stems directly from crash-safety requirements.

Crash-safety requirements are necessary only because cars crash. When we mandate fully-autonomous vehicles, crashes will be reduced to a miniscule fraction of what they are, because they'll occur only in cases of severe mechanical failure or some non-vehicle object on the roadway (big rocks, etc.). Effectively, we'll move the crash safety assurance from heavy steel to lightweight sensor, communications and computing equipment.

I'm not sure if cars can be made lightweight enough to operate at useful speed from on-board solar panels, but we will be able to get much, much closer than we are now.

Comment And the concept of extradition is well established (Score 1) 131

Happens all the time. If a person commits a crime against country A and they are in country B, country A may well ask country B to hand them over. If it happens or the details of it vary based off of the specific countries and their treaties, called extradition treaties. For example the US and North Korea? Ya not happening. There are no extradition treaties between those two, and the governments hate each other. so nobody is getting handed over. However EU nations? Extremely strong extradition treaties. If you commit a crime against Germany from France, Germany will have France arrest you and ship you over to stand trial.

The majority of nations have extradition treaties of some level with each other since they don't want criminals able to run off and hide from justice. It has been a thing for a long time.

Comment Re:Story's Not Over (Score 2) 203

If I understand this correctly, Akamai threw Krebs out because Akamai could not handle the DDS. This means I'm never sending any business to Akamai because they can't handle it properly. But it doesn't mean Krebs is off the air for long.

For example, I bet Cloudflare would take him on. They've differentiated themselves on the ability to handle DDS.

There's also Google's Project Shield, which is free for journalists.

Comment Re:Do we have to let the winner out of the arena? (Score 1) 53

Why does it boggle the mind? Most of the Android revenue is licensing. Google doesn't have a lot of cost when it comes to licensing.

I think most of Android's revenue is from the Play store, not licensing. In fact, I don't think Google charges anything for the Google apps, and it really couldn't charge anything for Android, since it's open source.

Slashdot Top Deals

"A mind is a terrible thing to have leaking out your ears." -- The League of Sadistic Telepaths

Working...