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Comment: Re:This is stupid (Score 1) 278

by avandesande (#49594051) Attached to: New Study Suggests Flying Is Greener Than Driving

I guess it depends where you are, in NM roads are sparse and sometimes geography gets in the way so in many cases a straight path can be significantly less. Most towns have small airports pretty close to them.
There are many people here that commute Albuquerque to Los Alamos in small planes and it is a huge advantage in time and cost(at least fuel).

Comment: Re:What's up with all the negativity (Score 2) 634

by avandesande (#49568735) Attached to: How To Increase the Number of Female Engineers

I think many of us have watched what they have done with primary and secondary education and are a bit leery of the changes- where they have focused on girls at the expense of what makes learning interesting to boys. I don't have a problem with them adding a few courses on engineering for third world solutions. I think most are fearful of an underlying change to the curriculum.

Comment: Numbers don't add up (Score 1) 480

A gallon of diesel holds about 50KWH of energy- at 12centKWH that is 6.00$ a gallon if you were getting 100% efficiency. Add in 50% efficiency for high temperature hydrolysis, 50% for fischer tropsch, heating losses, pressure, a non- energetically favored reduction of CO2 to CO you would be lucky to have 10% yield at the end. That is 60$ a gallon...
And no, the electricity is not free- nobody is going to spend capital on renewable electricity to do this if they could sell it on the market for much more.

"When the going gets tough, the tough get empirical." -- Jon Carroll

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