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Comment: Re:supercapacitors are cool (Score 1) 295

by pmontra (#43775895) Attached to: Charge Your Cellphone In 20 Seconds (Eventually)

We could solve that problem for cars if we standardize the batteries. Different cars with a different kW consumption could use a different number of the same standard battery. Instead of recharging we could swap batteries at the power station, an operation that might be automated and take no more time than filling up the tank with gas. But that means we have to trust the power station more than we do with gas stations now (at least until it becomes commonplace) so that might require a higher control, maybe directly by the car manufacturers.

On a related thought, liquid fuel is so convenient to stock indefinitely and distribute even in rural areas... I wonder if electricity will ever completely replace it.

Comment: Re:supercapacitors are cool (Score 4, Insightful) 295

by pmontra (#43766895) Attached to: Charge Your Cellphone In 20 Seconds (Eventually)
Yes, creepy...
Another problem is which wire you need to move all that energy into the capacitor in that little time. This applies both to the wire from the wall to the device and the one from the grid to the house (where I live residential contracts are usually limited to 3 kW). I didn't do the math but assuming it's not a problem for a cellphone it might be a problem for a charging a car fast. In a reverse-car analogy it's like having a 2 Mbit DSL to the Internet. Downloading a movie is going to take a long time a Gigabit home network won't help.

Comment: Re:Fine by me (Score 3, Interesting) 153

by pmontra (#43745485) Attached to: Ubuntu Developers Revisit Replacing Firefox With Chromium
Yes, everybody was using Windows (me too) but I remember that I left Netscape for IE5 because IE5 was so much better than Netscape 4 (IE4 was a little worse). IE6 was a good step forward, it killed Netscape and then the development stopped. Firefox appeared after a few years and was so much better than IE6, so I switched again. Chrome is a little faster than Firefox now, but the gap is getting narrower and its versions of NoScript, AdBlock, Firebug are worse so I'm sticking to Firefox. I'll end up installing it from some repository if Ubuntu switches, not a problem.

Comment: Re:Three Gorges Dam (Score 1) 478

by pmontra (#43732349) Attached to: Global Warming Shifts the Earth's Poles

It's not an International System unit but it is (somewhat) metric, because it has been agreed to be 1852 m (actually, by this line of reasoning the inch is metric too as it has been defined to be 2.54 cm).

It is based on a natural measurement, the length of a meridian of the Earth. That is 360 degrees and a nautical mile is a 1/60th of degree. Not all miles have the same length according to this definition and not all countries used the same definition so, to make a long story short, countries settled for those 1852 meters almost one century ago. By the way, the knot is the corresponding unit of speed (nautical miles per hour).

Comment: Re:I quite like mine. (Score 2) 250

by pmontra (#43679341) Attached to: Real World Stats Show Chromebooks Are Struggling
The Pixel has big resolution but little RAM and little local disc. I don't know if it can be upgraded, but if it doesn't it will be useful only as a chromebook. Not a machine one wants to buy to install a different OS. On the other side a MBP has an option for a 16:10 screen, which is great but one has to like OSX or take a little adventurous road to install Ubuntu 13.04 on it.

Comment: Re:This is good for Bitcoin (Score 0) 150

by pmontra (#43673041) Attached to: Btcd - a Bitcoind Alternative Written In Go!
In another age somebody would have said that banknotes are a virtual currency dependent on real gold. Well, maybe banknotes are really a pyramidal scheme with somebody at the top printing as much as they wish when it's more convenient to them and people at the bottom getting with nothing in their end if inflation kicks in too much or if somebody decides to confiscate the bits in their banking accounts.

This is for all ill-treated fellows Unborn and unbegot, For them to read when they're in trouble And I am not. -- A. E. Housman

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