Experimental nuclear and particle physicist. These days I'm teaching, but I've spent a lot of time on nucleon structure in fixed target electron scattering and neutrino oscillations using reactors and beam sources.

Been reading Zemansky & Dittman's book on thermodynamics recently. Quote: ``The concept of temperature is rich in interpretations and levels of abstraction.'' Nice.

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answered What happens during gravitational collapse to cause the formation of a star?
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comment What is the exhaustive set of experiments a quantum theory has to satisfy?
@GlenTheUdderboat The double slit is not sufficient, it's the place to start---the first test people will turn to. Then you still have to get the Quantum Zeno effect, Bell's inequality experiments, and the delay-choice quantum eraser right as well. Probably others too.
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revised Identify book - conflict between humans on sublight ship
edited body
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answered Identify book - conflict between humans on sublight ship
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comment MCNPX for nuclear simulation
There have been several meta discussion related to this type of topic. See http://meta.physics.stackexchange.com/q/3980/520 http://meta.physics.stackexchange.com/q/2898/ and http://meta.physics.stackexchange.com/q/2825/. We seem to be allowing some sufficiently specific physics-software questions.
19h
comment Problems with Stack Overflow's Creative Commons license agreement
If I put something out there under a pseudonym (like, say, a username) and people attribute the work to that pseudonym then they've done what was expected of them. Or they could link to my profile. We don't live in Earthsea and there is magic attached to true names.
19h
comment Alternatives to ArXiv
@xLeitix You generally expect alternatives that don't offer a solution to a problem with the dominate player to have a hard time. I've been happy with arXiv for my needs, so I don't see the handle a up-n-comer needs. But maybe I'm missing the obvious.
20h
comment Does it make sense to get a PhD if a person does not want to be in academia and prefers to stay in business?
Meh. My father went back for his Ph.D. near the end of a long and productive industry career (for self-actualization reasons mostly, I think). He was able to do it on a part time basis and since he didn't need support there was nothing resembling "enslavement". And it paid off for him as his employer was able to offer clients Dr. McKee as the PI for their project and when he got out of that job the title has served to help his consulting sideline (especially in the matter of being a expert witness in court).
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awarded Nice Answer
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comment Survival probability of Solar neutrinos
I believe the differences are pretty small, but in any case it depends on the energy through the forward scattering amplitude in the matter effect. The energy range present in the solar neutrino spectrum is pretty modest compared to the W mass, meaning that the matrix elements can have only slight variations.
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comment Story identification - replicators causing a society collapse
Also available in at least one of the best of [year] anthologies.
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answered a suggestion for community updates
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comment Arrangement of neutrons and origins
Related: physics.stackexchange.com/questions/35724/… physics.stackexchange.com/questions/55745/… Possible duplicate: physics.stackexchange.com/questions/36469/…
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comment What are the "must-read" Science Fiction novels / series?
Just as a point you might want to consider: many, many of the real masterpieces of the genre are short fiction. If you're leaving out short stories then you are missing really important stuff.
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answered Proof of Lorentz contraction?
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comment Proof of Lorentz contraction?
If you view the above problem from the muon's point of view it is also a demonstration of length contraction (the Mountain got shorter or they wouldn't make it to the bottom). This is to be expected because both phenomena are expressions of the constancy of the interval between events.
Feb
24
revised Please help identify an old scifi comic book ~1970-1990
added 32 characters in body
Feb
24
answered Please help identify an old scifi comic book ~1970-1990
Feb
24
comment Please help identify an old scifi comic book ~1970-1990
Short? That is admirably terse, but very complete.
Feb
24
comment Please help identify an old scifi comic book ~1970-1990
This is the store of Joe Halderman's *The Forever War* (a novel that ever SF fan should read), but I don't know the comic.
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