12 posts • joined Thursday 1st November 2012 11:26 GMT
Re: So wafer sizes moving up from "carpet tile" to "family pizza" size?
@John172 -- you might also want to look at the price of these Xilinx devices, they've gone this way so they can reduce NRE costs by building a whole familiy of devices out a a few predefined "slice" chips, and get acceptable yield on what would otherwise be enormous almost-zero-yield chips.
Silicon interposers are not cheap yet, especially with the extra processing costs and issues like how to test the die and interposer before assembly, which involves things like bonding/debonding to sacrificial carriers.
In other words, just because McLaren can afford to use a technology in a road car, don't assume Ford can...
Re: Well yes
The link is *very* directional line-of-sight with a beam width of a few degrees, like a flashlight -- it's intended for a small number of backhaul point-to-point links, not broadcast radio with many potentially interfering transmitters.
Stating that FTTx is optimum in the long run is obvious, until you're in a small village where 1km of road needs digging up to reach a few subscribers. In this case a small dish at each end would be a lot cheaper.
Another possible application is links between the large number of microcell basestations needed for widespread 4G/5G access in cities. Digging up city streets to install the fibre needed to link these -- because many more basestations will be needed than at present to get the network capacity -- is also a lot more expensive than point-to-point radio links between rooftop dishes.
@ Happy Ranter -- smaller batteries with a 20kW motor is exactly what Mercedes have done with the E300 hybrid, which also has a cost premium of only about £3000 over the straight E250 diesel.
This is enough to give hybrid economy and noise benefits (regenerative braking and engine-off coasting, electric only in start/stop traffic, engine start/stop with no delay when pulling away) without a big cost increase or any reduction in luggage space, everything fits under the bonnet.
Whether it delivers the claimed urban economy remains to be seen, but then due to the unrealistic EU test cycle neither do most cars, hybrid or not. What is certain is that with lease costs and fuel costs and BiK taken into account it does make sense for leased company car drivers, which is the biggest UK market for this type of vehicle.
And it's spooky to drive, most of the time while driving the only way to tell that the engine's been switched off is by looking at the rev counter...
Re: So I should scrap the plan...
For the benefit of non-native English-speakers, there's a traditional dish from the north of England called faggots (they're a type of meatball including liver, traditionally served with mushy peas).
When we had a bunch of friends over from the states, one of our guys who's a serious cook did a sort of "fusion cooking" version of them which were coloured with (I think) beetroot and flavoured with (among other things) lime leaves.
They were very nice, but the main reason was so he could put "Pinko Limey Faggots" on the menu...
Even bigger bill
One of the guys at work didn't find out that his 5-year-old son had spent just over £8000 in game goodies using his iPad unitl his credit card bill arrived. Luckily he got the entire sum waived, but only due to the goodwill of (I think) the game developer -- 'cos I doubt that Apple would have been so sympathetic, their response at the time was that it was your fault not not disabling in-game purchases...
What Moore actually said was that the number of components which can be integrated *at the minimum cost per component* doubled every two years (or whatever), since this is what drives the economics of what can be integrated.
In this sense it's already dead, even at 20nm the projections are that the cost *per transistor* won't fall below that for 28nm in the foreseeable future, and neither will 14nm, because the cost per square mm is going up as fast as the gates/mm2.
The industry had better get used to the fact that from now on you can integrate more, but it will cost more -- the days of the free luch are over :-(
Re: Leccy? No!!
A large number of electric cars is probably the only energy storage method with enough capacity to fill the gaps when the wind stops blowing to make renewables really work without fossil fuel backup, but there needs to be an awful lot of them plugged in a lot of the time to do this...
Bear in mind that renewables will have a hard enough job replacing fossil fuels to generate existing electricity demand (read "Without the Hot Air"), the added demand from millions of electric cars will make this problem worse.
Apart from the charging problem (which could be helped by swappable battery cassettes) the biggest issue with electric cars is the battery -- cost, weight, range, C02 load to manufacture. It would need a really major breakthrough in affordable battery chemistry (no exotic materials) to fix this, and there isn't one on the horizon yet, a huge improvement in energy density is needed not a small one.
Re: Leccy? No!!
Sounds great in theory, but in practice the power grid eats all the energy that renewables can generate right now, and the balance is made up by fossil fuels. Increasing power grid demand from lots of electric cars today would mean that the increased power required will be generated by fossil fuels, not renewables.
Of course this won't be true in that happy but distant future when renewables (or nuclear fission or fusion) generate all our power, but it is the case today and will be for the foreseeable future.
Tesla's charging stations can only be powered by solar panels on the roof because there are so few Tesla cars using them, multiply the numbers by 100x or 1000x and it's back to juice from those nasty dirty fossil fuels.
It's still true that electric cars have better overall well-to-wheel efficiency than petrol or diesel so the overall CO2 impact is positive, but don't think that all that power comes from nice green sources because it doesn't.
Then there's the battery problem...
Re: Leccy? No!!
But unfortunately, one with considerably lower efficiency than conventional batteries, once all the energy losses are taken into account.
Since the best way to reduce emissions overall is better energy efficiency, fuel cells (or even worse, hydrogen powered IC engines) get a big thumbs-down.
Re: Leccy? No!!
And where does the fuel for the fuel cells come from? And what fuel is it?
If it's hydrogen, the energy to generate this also comes from the same non-renewable generators as for EVs but less efficiently, so the overall well-to-wheel efficiency is far worse and the effective CO2 emissions are worse than a petrol car.
I had to laugh when I was at a conference in Turin last year and heard an American lady trying to order a "lar-tay" at the coffee bar, they'd got no idea what she was asking for -- and asking for it over and over more loudly and slowly each tim ("laarr-tayy") just made it worse.
For those who can't see what's wrong with this, it's a "caffe latte" in Italy, never just a "latte" -- which would be a glass of milk -- and is pronounced with a short "a" because it's Italian :-)
Re: I'm in the killjoy camp
When I was at NPL to do some equipment calibration last year I was amused at a warning sign on one of their optical test benches -- "Warning -- do not look into the laser beam with your remaining eye" :-)
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