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Comment: Re:Photo synthesis is not all that efficient. (Score 1) 80

by jkflying (#43708235) Attached to: Plug Into a Plant: a New Approach To Clean Energy Harvesting

I have no idea where you got that number, or why you think that there even is any limit below 100%.
Do some reading: http://en.wikipedia.org/wiki/Heat_Engine#Efficiency Note how the graphs for a Carnot Engine start at ~40% and go up to ~75% as the inlet temperature rises.

Comment: Re:FX spaceships are cheap (Score 3, Interesting) 468

by jkflying (#43664167) Attached to: <em>Ender's Game</em> Trailer Released

There's an interview with Card where he mentions the script he wrote, all the way back in 1998:
http://hatrack.com/research/interviews/1998-scott-nicholson.shtml

If this is keeping with that, then they are telling the story from the adult perspective, because 'keeping the secret' until the end makes it necessary to leave out too much of the story when you're telling it by film. So instead the audience knows, but Ender doesn't, so we get to see his actions knowing entirely what the consequences are. It also integrates some of the Ender's Shadow elements, like more information about Bean.

In a way this is even more brutal than how the book tells it.

Comment: Re:This could be good... (Score 1) 79

by jkflying (#43618227) Attached to: LLNL/RPI Supercomputer Smashes Simulation Speed Record

I find this topic extremely interesting, and it is a field I could see myself getting involved in, however my background is undergrad elec/mech with my MSc. in robotics/mapping/AI. I've also done a ton of simulation work via Robocode. What kind of background topics would I need to still learn to do this kind of work? I'm guessing quantum physics and chemistry along with some more hardcore comp-sci.

Comment: Re:But i like to dim my lights (Score 1) 308

by jkflying (#43544841) Attached to: Cause of LED Efficiency Droop Finally Revealed

It doesn't help having a 90+% efficiency current driver if you are then sticking a big power-dissipating resistor in series with your LED. If you want high-efficiency current drivers look at standard switch-mode power supplies, something like this at a high frequency, possibly with another capacitor across the power supply; it will give you efficient, smooth PWM-based current control. Note, the LED doesn't see any PWM, but the regulator is PWM based, ie. a switch-mode power supply.

NEWARK has been REZONED!! DES MOINES has been REZONED!!

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