207 reputation
215
bio website math.stackexchange.com/users/…
location Champaign, IL
age 36
visits member for 3 years, 10 months
seen Oct 9 at 6:59

Amateur mathematician, professional software engineer. Interested in all kinds of math, becoming a better mathematician, and helping others do the same.

email: jdb1729 (at) gmail.com

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May
25
comment Which person can handle falls from big heights better: lighter or heavier?
I just realized that the "surface area" argument leads to the opposite conclusion! I don't mind downvotes but I hope someone can clarify.
May
25
answered Which person can handle falls from big heights better: lighter or heavier?
May
25
comment Conservation law of energy and Big Bang?
I also like the accepted answer to this question physics.stackexchange.com/questions/296/… which supports Luboš's interpretation. But my point still stands that energy should be defined in such a way that it sums to zero, and to my knowledge this was never disputed by Einstein, in accordance with my interpretation of the question. Or was that the essense of his "greatest mistake"?
May
25
comment Conservation law of energy and Big Bang?
The historical POV is implicit in the phrasing of the second part of the question.
May
25
comment Conservation law of energy and Big Bang?
The article is speculative and the negative answer is heavily qualified. I stand by my position, although there is definitely lots of food for thought here (hopefully not my hat!)
May
24
comment Atomic mass of Copper-63?
Can someone with more than 300 karma please add the tag "library-science"? I seem to have squandered my own on bounties!
May
24
comment Conservation law of energy and Big Bang?
Well, that is the cue to eat my hat! The answers to this other question physics.stackexchange.com/questions/1327/… are also interesting.
May
24
awarded  Organizer
May
24
revised Conservation law of energy and Big Bang?
add tag general-relativity
May
24
revised Atomic mass of Copper-63?
typo
May
24
revised Conservation law of energy and Big Bang?
fix typo
May
24
revised Conservation law of energy and Big Bang?
fix link
May
24
comment Conservation law of energy and Big Bang?
Can we push philosophy.SE area51.stackexchange.com/proposals/2578/philosophy past the beta threshold? There we can all talk about Popper's theories which would be inappropriate here.
May
24
suggested approved edit on Conservation law of energy and Big Bang?
May
24
comment Conservation law of energy and Big Bang?
Not sure why the downvote. Did Einstein make any argument that energy is not conserved? Luboš seems to be using tools that would not have been available to Einstein.
May
24
comment Conservation law of energy and Big Bang?
I think this is a language game. What is the definition of "energy" if not "that which is conserved"?
May
24
answered Conservation law of energy and Big Bang?
May
24
revised Atomic mass of Copper-63?
generalize question
May
24
comment Atomic mass of Copper-63?
Googling the 2003 value google.com/search?hl=en&q=%2262.929597474%22 I found near the top another discussion thread in which someone has used the 62.939 value to argue against the feasibility of this same cold-fusion: tickerforum.org/akcs-www?post=177539&ord=2364030#2364030
May
24
comment Atomic mass of Copper-63?
How to find the origin of any of these numbers? What were the experiments, who conducted them, where, when, etc.? I've tried to follow the references myself but I hit a dead end.