Slashdot is powered by your submissions, so send in your scoop

 



Forgot your password?
typodupeerror
DEAL: For $25 - Add A Second Phone Number To Your Smartphone for life! Use promo code SLASHDOT25. Also, Slashdot's Facebook page has a chat bot now. Message it for stories and more. Check out the new SourceForge HTML5 internet speed test! ×

Comment Re:Modern consumer solar (Score 1) 119

How on *earth* did your school manage to install a large panel costing tens of thousands that can generate as little as 45W??? Can you provide more details? Cos this sounds pretty dubious. What time of day? How old is the installation? What was its rated generative capacity? Where is the school?

I mean, a typical home installation generates 3kW, and costs well under 10k.

Comment Re:Too Little for Too Much (Score 1) 103

How is it Apple's fault that Southwest Airlines haven't released an iPad-specific version of their app? It's also very clear why Southwest haven't done so: the vast majority of the use case that they're addressing are travellers moving to and through airports, who are much, much more likely to access the app on their iphones than on an ipad.

There's plenty of business-focused apps that are optimised for iPad because that's what their target market will be using. But they're very vertical-specific, by and large. If you're a dentist who does implants, 3Diemme's solution is excellent: http://www.3diemme.it/en/produ... If you're a pilot, you are very likely to be using an electronic flight bag (developed in-house, mainly). That's where the value is for business.

Comment Re:Good fun (Score 1) 519

*Pretty* sure that Gulf War 1, Gulf War 2 and the invasion of Afghanistan were in fact carried out by Republican administrations. But you keep telling yourself that the only party of war is the Dems.

Comment Re:I will not buy an electri car until (Score 1) 160

4 hours there and 4 hours back, not really that unusual of a commute when you live outside of a city

Not really that unusual?? Are you having a larf? I would wager that even in the most flyover of flyover country, an eight hour daily commute is actually *quite* unusual, as in, the sort of commute that fewer than 0.1% of the population would do. As if it were normal to leave the house at 5am, drive 4hours, work till 5pm, and get home at 9pm!!

Comment Re: Now this is very cool (Score 1) 306

Didn't know how much energy was lost to inefficiencies, eg resistance. On reflection, I'm sure a tiny amount, so yes, the faster rate would only be helpful at public chargers that are able to deliver power at very high rates. As I understood it, the rate-limiting step has not been the batteries' ability to accept charging at high rates of power, but the safety risks associated with high rates of power -- no-one's quite got the balls to deliver 150kW chargers for public use just yet.

Comment Re:Now this is very cool (Score 1) 306

Not the way you do it, for sure. I can't believe it can really be safe to do 800 miles with only a 15min break! Additionally, I'm not sure I understand how your maths works. If you're travelling 800 miles then at 60mph that's more than 13 hours, ie an all-day affair. Even at 90mph, it's nearly 9 hours, which pretty much feels like all day to me. Whether you have a 15min or 60min break feels fairly immaterial in that context, no?

Comment Re:Virtually no change from 1965-1978, 1988-2008 (Score 1) 306

We'll come to your exciting interpretation of the data in a minute, but let's begin with the basics: I said "The costs of solar power have plummeted -- more than a hundred-fold decrease since 1977". You replied with some stuff that gives the impression that you're disputing that fact without ever quite disputing that fact, I guess because you accept that it is true that prices have plummeted. So I'm really not clear what the point of your post is:
- it took a lot of investment to bring solar prices down? I mean, I'm sure it did, most energy sources require huge amounts of investment just to produce without any benefits in $/W reductions over time, and it doesn't affect the fact that prices have indeed come down
- some kind of prediction that solar costs can't fall further in the future? I mean, if you think that, you're a braver analyst than me

And finally, your interpretation: How on earth did you conclude that there were two major price drops in the last 60 years?? Which data could possibly support that interpretation? According to the first chart I linked to, prices dropped every year from 1977 (~$77/W) through to 1989 (~$6/W) -- but you talk about a "change in the early 80s". The rate of change in the early 80s is slower than the rate in the late 70s, which doesn't tie up with your narrative. From 1989, prices stayed steady for about 10 years and then fell significantly through to 2008 (~$4/W) -- a near-halving. From 2008 to 2013, they fell even more significantly to under $1/W.

It takes really determined squinting to look at a chart showing 36 years of significantly declining prices with a decade-long plateau in the middle and describe that as "two major price drops". Had there been a 3 year period of price declines, a 30 year period of plateau, and a further 3 year period of declines, then that would be a reasonable characterisation.

Comment Re:Now this is very cool (Score 1) 306

Man, the US is different from Europe. Here it is never -- never -- cheaper to drive a mile on gas cf a mile using electricity. My Renault Zoe EV will do about 100 miles per £1. A Renault Clio gas car would do about 12 miles per £1. (New Renault Zoe has a 180mile range, but it will not be sold in the US because Renault aren't present in the market, and because it's too small to be successful)

Slashdot Top Deals

New York... when civilization falls apart, remember, we were way ahead of you. - David Letterman

Working...