- Mensaje original -
De: Robert Ulanowicz u...@umces.edu
Fecha: Sábado, 29 de Diciembre de 2012, 4:26 pm
**
Stan,
We know that the Fine-Structure Constant, alpha, has changed
over the
course of the universe
http://en.wikipedia.org/wiki/Fine-structure_constant. I
wrote in my
last book how I suspect others have evolved as well.
What is needed is a good dimensional analysis. Unfortunately,
dimensional analysis seems foreign to physicists. Otherwise, they
wouldn't be making some of the incredible claims that are
abroad! :)
Cheers,
Bob
Quoting Stanley N Salthe ssal...@binghamton.edu:
Gordana has said:
Information and Energy/Matter
What can we hope for from studies of information
related to energy/matter
(as it appears for us in space/time)? Information is a concept
known for
its ambiguity in both common, everyday use and in its specific
technical applications throughout different fields of research
and technology.
However, most people are unaware that matter/energy today is
also a concept
surrounded by a disquieting uncertainty. What for Democritus
were building
blocks of the whole universe appear today to constitute only
4% of its
observed content. (NASA 2012) [1] The rest is labeled dark matter
(conjectured to explain gravitational effects otherwise
unaccounted for)
and dark energy (introduced to account for the expansion of the
universe). We do not know what dark matter and dark energy
actually are. This indicates that our present understanding of
the structure of the
physical world needs re-examination. [...]
Information and Energy/Matter
Gordana Dodig Crnkovic
Information 2012, 3(4), 751-755;
http://unam.us4.list-
manage2.com/track/click?u=0eb0ac9b4e8565f2967a8304bid=ae24f18d1ee=d38efa683e
Special Issue Information and Energy/Matter
http://unam.us4.list-
manage.com/track/click?u=0eb0ac9b4e8565f2967a8304bid=ea193b9747e=d38efa683e
See it on Scoop.it (
http://unam.us4.list-
manage.com/track/click?u=0eb0ac9b4e8565f2967a8304bid=cdfa764e97e=d38efa683e)
, via Papers (
http://unam.us4.list-
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)
I would like to inquire whether any fis'rs might react to the
following notion:
Dark matter is postulated because the amount of matter
detectable in
galaxies would be insufficient alone to explain how they hold
together given the value of the gravitational constant.
However, the information we glean from galaxies represents
their condition
as it was a very long time ago, in an earlier universe.
Is it not possible to resolve this puzzle less radically than
by inventing
dark matter by supposing that the gravitational constant has
not been
constant but has instead been changing, and was much stronger
in the past,
which is when we detect these distant clusters of
matter? Perhaps G as
been scaled to the rate of expansion of space? Perhaps
the rate of
expansion was greater then than now, even with current acceleration?
STAN
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