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seen Dec 15 '12 at 1:59

Jan
25
answered Chance of objects going against greater entropy?
Jan
25
comment Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
actually I had already voted you up because: the second bullet looks a lot like a different interpretation of what I have in mind, and because it is a summary of what different directions the scientific community explores on the topic, which was part of the question
Jan
25
revised Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
added 47 characters in body
Jan
25
comment Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
"the future and past don't play symmetric roles in logic." are you refering to the Kripke model of temporal logic? (which is used in formal verification of communication protocols etc)
Jan
25
comment Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
initial and final are no symbols from logic! although you may certainly call them symbols from common sense: we are macroscopic subsystems in a larger system
Jan
25
comment Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
i.e. perhaps an anthropocentric-style (but really macroscopic subsystem-style) argument resolves the Loschmidt paradox?
Jan
25
comment Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
I never questioned the need of axioms of logic! I question the need of axiom that introduces the arrow of time, perhaps it is already present as a COROLLARY of exactly the necessary axioms of logic.
Jan
25
comment Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
i.e. time would follow from memory (a macroscopic state of a subsystem of the system)
Jan
25
comment Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
I.e. if a (subjective towards the macroscopic entity in the system) definition of time would map microstates of the system to times the macroscopic entity in the system measures, perhaps this corrolary would follow?
Jan
25
comment Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
Could it not be that this axiom is not independent from more fundamental axioms (from say logic), i.e. it does not harm to add it as an axiom as it wont conflict, but it may be a corrolary of widely used deeper axioms, of which we dont know the proof yet?
Jan
25
comment Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
"the probability to get from the initial ensemble (at t1) to the final ensemble (at t2) must be averaged over the initial microstates but summed over the final microstates" you are using english "initial" and "final" to introduce a (hidden?) axiom which assumes t1 =< t2, i.e. it should really read "the probability to get from the ensemble A to the ensemble B must be averaged over A's microstates but summed over the B's microstates if and only if timeA <= time B" I believe this is true, as I said the evidence is overwhelming. But my question is: is this extra axiom necessary?
Jan
25
asked How are particle simplices associated into complex particles?
Jan
25
comment Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
has the statistical mechanics relationship between microscopic variables (unknown to an entity within the system) and macroscopic variables (some of which form the "knowledge" of an entity in the system) been combined with Kripke semantics to explain the arrow of time?
Jan
25
comment Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
"It could be that the time asymmetry of the universe is driven by the laws of quantum mechanics through the measurement process which is time-asymmetric." it seems like time and knowledge of an entity embedded in the system (which performs and learns information) is getting towards an answer
Jan
25
asked Does the scientific community consider the Loschmidt paradox resolved? If so what is the resolution?
Jan
25
comment Can energy be extracted from clouds?
or they are not telling us: perhaps lighting could be seen as some native american resource
Jan
24
comment Should linear algebra and vector calculus from traditional courses be replaced with `geometric algebra`?
awesome, thanks!
Jan
24
comment Can energy be extracted from clouds?
just like they are a way of extracting energy from the sun ...
Jan
24
comment Why is it that using cell phone can invite lighting strike?
because your reception in the safe faraday cage of your car was not good enough...
Jan
24
asked Can energy be extracted from clouds?