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Comment: Re:Suercaps (Score 1) 149

by dfsmith (#47893557) Attached to: Direct Sales OK Baked Into Nevada's $1.3 Billion Incentive Deal With Tesla

Using wikinumbers, here are some relevent energy densities.

  • Li-ion battery: 100 to 265Wh/kg (900 to 1900J/cm3)
  • Supercapacitor: 0.5 to 15Wh/kg (no volumetric density easily obtainable).

Here's a press release from some company that claims 60Wh/l (~200J/cm3) from their research supercaps.

Comment: Re:dv camcorder (Score 1) 130

by dfsmith (#47855283) Attached to: Ask Slashdot: Best Service To Digitize VHS Home Movies?

Every digital format is lossy compared with the analog source material. As long as you only lose the noise part, you can reasonably call it lossless. I think the analogy is more like:

  • "Where can I find a good semi-freestone peach pie?"
  • "The place over there does a great clingstone peach pie."

10 to the minus 6th power Movie = 1 Microfilm