Profile cover photo
Profile photo
Alexandre Vaudrey
848 followers -
http://orcid.org/0000-0002-8613-774X
http://orcid.org/0000-0002-8613-774X

848 followers
About
Posts

Post has shared content

Post has shared content

The arrow of time is not so absolute, new experiment shows.

Time is such a basic property of our physical universe that it seems it would be easily and clearly defined scientifically in any physics model. Yet, on closer examination, time is a tricky property to pin down and delineate---and our “common sense” conceptions of time may not be as reliable as we would presume. Accordingly, a very big and outstanding question in science is: what is time?

Post has attachment

Post has shared content
Life arose as a natural consequence of the laws of thermodynamics, argues MIT’s Jeremy England. Now computer simulations appear to offer the first empirical support for his provocative hypothesis.
http://bit.ly/2v2mjMz

Post has shared content
Obligatory Thanksgiving post

... about trying to determine the specific heat of a turkey:
https://www.wired.com/story/want-a-perfect-turkey-calculate-its-specific-heat-capacity/

The error in the estimate of the specific heat (it is bigger than that of water) is likely due to ignoring the temperature distribution in the water and within the turkey. For a better estimate try to solve the non-stationary heat equation: Start from water and turkey each having a certain constant initial temperature, then fit the evolving temperature curves using c_Turkey as a parameter. And yes, you also need an estimate for turkey density (distribution) and turkey heat conductivity (distribution) ;-)

Other sources of error: Is a part of the turkey perhaps still frozen and is water also evaporated in this process?

Post has attachment
This year we give thanks for a simple but profound principle of statistical mechanics that extends the famous Second Law of Thermodynamics: the Jarzynski Equality.

Post has attachment

Post has attachment
Look at this seater worn by one of my student during a recent session of practical works of thermodynamics ! Provocation ? Wired sense of humour ? One of good points of this job ;) By the way, this formula also contains a private private joke in French, impossible to translate.
Photo

Post has attachment

Post has attachment
Wait while more posts are being loaded