310 reputation
26
bio website cs.virginia.edu/~abh2n
location Charlottesville, VA
age 44
visits member for 3 years, 6 months
seen Nov 21 at 1:21

I am a Principal Scientist at Dependable Computing in Charlottesville, VA, where we work on safety case engineering, formal specifications, requirements gathering, and other safety-critical and security-critical software engineering issues. I have a PhD in Computer Science from the University of Virginia, with my dissertation involving a genetic algorithm exploration of neural network models of the hippocampus. I've also previously earned Masters degrees in Physics/Astronomy (involving General Relativity) and Computer Science (involving improving multi-processor implementations of hippocampal neural network simulations).


Jul
19
awarded  Enlightened
Jul
19
awarded  Nice Answer
May
19
awarded  Yearling
Jun
24
comment How viable is reuse of nuclear waste at this point, and what are future prospects?
I'm also confused as to why this was closed. Is it because of the social aspect, or because he's asking more of an engineering question than a physics question? The core question, as I understand it, it "What is the current state-of-the-art in terms of waste handling, and can it be reasonably expected that underground deposition of nuclear waste can be eliminated altogether in the foreseeable future?"
Jun
24
revised Finding Directions using moon
More minor clean up
Jun
22
revised A fan in a hot room at what point does it put in more energy that it dissipates
added 214 characters in body
Jun
22
comment A fan in a hot room at what point does it put in more energy that it dissipates
@Vintage: Another good point. I'll edit my answer to include the points that you and Mitchell have made.
Jun
22
answered Conversion of mass to energy in chemical/nuclear reactions
Jun
22
awarded  Critic
Jun
22
comment Does hot air really rise?
With respect to water, the temperature at which warm water becomes less dense than cold is 4° C. van.physics.illinois.edu/qa/listing.php?id=1736
Jun
22
comment A fan in a hot room at what point does it put in more energy that it dissipates
@Mitchell: Excellent point
Jun
22
revised A fan in a hot room at what point does it put in more energy that it dissipates
added 34 characters in body
Jun
22
awarded  Teacher
Jun
22
answered A fan in a hot room at what point does it put in more energy that it dissipates
Jun
22
answered Finding Directions using moon
Jun
21
comment Can one do the maths of physics without using $\sqrt{-1}$?
I agree with @lurscher that it wouldn't be easy or rewarding, and also with what I think is his implied suggestion that it would still be theoretically possible.
Jun
21
comment Is the entire Universe the same age?
@Ted Bunn: Nice addition. I question your last paragraph, though. Wouldn't general relativistic effects make that not true, since time flows slower in a gravitational field? (As an extreme case, consider the adventures of an observer near the event horizon of a black hole who can manage to watch the universe age billions of years while mere minutes elapse for himself.)
Jun
21
awarded  Editor
Jun
21
revised Is the entire Universe the same age?
added 311 characters in body; added 12 characters in body
Jun
21
answered Is the entire Universe the same age?