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FQXi FORUM
November 20, 2018

CATEGORY: Cosmology [back]
TOPIC: Time in Physics & Entropy and the Universe [refresh]
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FQXi Administrator Brendan Foster wrote on Dec. 22, 2015 @ 17:36 GMT
Thanks to FQXi Member and expert on the nature of time Julian Barbour for pointing out the online videos of talks of the recent Workshop on Time in Physics at the ETH Zurich.

Julian's talk on Time's Arrow and the Entropy and the Universe (research funded in part by FQXi) is available on Day 5 of the workshop. Slides of the Julian's talk are attached here as well.

attachments: Zurich_September_2015_Revised_Part1.pdf, Zurich_September_2015_Revised_Part2.pdf

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James A Putnam replied on Nov. 21, 2016 @ 04:18 GMT
If the subject becomes: What did Clausius discover when he wrote his equations for thermodynamic entropy? The answer is: Temperature needs to be made a definable property. Temperature is, and always has been since its introduction, an indefinable property of thermodynamics. Without an understanding of what is temperature, there has been no path to understanding what Clausius discovered. The idea that lack of understanding is due to a natural unhelpful limitation in the seemingly simplicity of Clausius' work is a cover for lack of understanding of what should have been even simpler clear important empirical guidance. After one returns to basics and defines mass, one learns what is temperature and the knowledge of what did Clausius discover comes immediately to the forefront. What is learned in general terms is that Clausius' thermodynamic entropy is a measure of time. That measure of time contains the identity of a universally constant measure of time. Time is real and the universe keeps control of it, from our object oriented view, by establishing that there is a fundamental increment of time by which all action of objects is universally measured. That fundamental increment of time has a magnitude that has been known.

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Georgina Woodward wrote on Dec. 22, 2015 @ 21:30 GMT
Yes thank you Julian Barbour, and Brendan Foster for sharing these with us.

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Pentcho Valev wrote on Dec. 22, 2015 @ 22:53 GMT
I think I am relatively competent in thermodynamics but in this case I don't understand anything. Barbour does not move from premises and definitions to conclusions - the only intelligible way to discuss physics (in my view). But that is a universal problem nowadays - the deductive approach (Einstein's special relativity is an example) is long abandoned.

Pentcho Valev

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Amrit Srecko Sorli wrote on Jul. 26, 2016 @ 16:39 GMT
Amrit Šorli book ADVANCED RELATIVITY will be published at AMAZON in September 2016. ADVANCED RELATIVITY will liberate entire science from the prison of psychological time. Science will be awakened in the NOW of Albert Einstein. 

attachments: AR_cover_rna_2-page-0_1.jpg

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Alan Charles Folmsbee wrote on Jan. 5, 2017 @ 00:58 GMT
gravito-Maxwellian Equations

The magnitudes of the Maxwell Equations are given full details of time and space dimensional flows in 8 dimensions. This is based on The Gravity Volume Theory. Time grows radially out of protons and neutrons as space drains in to conserve continuum. One jpeg image (link 1) shows 8 formulas, based on the radius r of a proton, and two time constants. The 5ns time...

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Shi Nendi wrote on Feb. 9, 2018 @ 15:56 GMT
Hi, just wanna say that i really enjoyed reading this topic, coz i really like all astronomy articles! Thank you for this epic information! Cheers.

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Vanessa Hudson wrote on Oct. 24, 2018 @ 14:07 GMT
I have a course of Cosmology at college. It is a very interesting subject which I want to study more and more. I even decided to write a scientific report about World Civilization.

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