Ελάτε να συζητήσουμε για τον Χρόνο!

 

Δεν υπάρχει άνθρωπος που δεν ασχολείται μαζί του, που δεν τα βάζει μαζί του. Ο χρόνος μας καταδυναστεύει, γιατί κυλάει πάνω μας και μας οδηγεί στον αφανισμό. Αλλά χωρίς τον χρόνο θα υπήρχαμε; Τι θα σήμαινε να μην περνάει ο χρόνος και να μην μεγαλώνουμε; Υπάρχει τελικά ο χρόνος ή είναι επινόησή μας; Η επιστήμη, η φιλοσοφία, η τέχνη, η ποίηση, όλοι εμείς προβληματιζόμαστε και στοχαζόμαστε για τον χρόνο. Το “Ανθολόγιο” κάνει ένα μπουκέτο ιδεών και απόψεων περί του χρόνου. Απολαύστε το! Είναι καταπληκτικό!!!

 

Επιμέλεια: Νίκου Τσούλια

The 20 big questions in science

 

From the nature of the universe (that’s if there is only one) to the purpose of dreams, there are lots of things we still don’t know – but we might do soon. A new book seeks some answers

· Hayley Birch, Colin Stuart and Mun Keat Looi

· The Observer, Sunday 1 September 2013

· Jump to comments (884)

 

What’s at the bottom of a black hole? See question 17. Photograph: Alamy

From Eternity to Here: Sean M. Carroll’s Quest to Understand Time

Stol Jacobus Van Der Skaters On A Frozen River Near A koek En  Zopie

 

 

Sean M. Carroll, theoretical physicist at the California Institute of Technology talks with podcast host Steve Mirsky about his new book From Eternity to Here: The Quest for the Ultimate Theory of Time. Plus, we test your knowledge of some recent science in the news. Web sites related to this episode include preposterousuniverse.com

Sean M. Carroll, theoretical physicist at the California Institute of Technology talks with podcast host Steve Mirsky (pictured) about his new book From Eternity to Here: The Quest for the Ultimate Theory of Time. Plus, we test your knowledge of some recent science in the news. Web sites related to this episode include preposterousuniverse.com

Space and Time: Inertial Frames

Jacobus Van Der Stok (1794-1864), _A_Winter_Landscape_With_Skaters_On_A_Frozen_Waterway_And_A_Horse_drawn_Cart

 

http://plato.stanford.edu/entries/spacetime-iframes/#1#1

A “frame of reference” is a standard relative to which motion and rest may be measured; any set of points or objects that are at rest relative to one another enables us, in principle, to describe the relative motions of bodies. A frame of reference is therefore a purely kinematical device, for the geometrical description of motion without regard to the masses or forces involved. A dynamical account of motion leads to the idea of an “inertial frame,” or a reference frame relative to which motions have distinguished dynamical properties. For that reason an inertial frame has to be understood as a spatial reference frame together with some means of measuring time, so that uniform motions can be distinguished from accelerated motions.

THE NATURE OF TIME

The sun shines on the peaks of Mount Everest and Nupse in the Himalaya mountain range from the country of Nepal.

 

by Humberto Maturana

  I do not wish to deal with all the domains in which the word time enters as if it were referring to an obvious aspect of the world or worlds that we human live. Indeed, the very fact that time can be made an issue of reflection shows us that what the word time connotes changes with the circumstances in which it is used. This situation alone, however, would not constitute a problem inviting us to enter in deep reflections if we just accepted that the context defined the meaning of the word in each case. But we do not do that, and we ask the question what is time? as if we thought that the word time referred to some independent entity or dimension of nature that could be properly disclosed or described if we tried hard enough, even if we could not the final essence of it. I consider, however, that the question what is time? is adequate because it implies from the start the view that time can be properly treated as some kind of independent entity or dimension of nature. And I consider that such a view is fully inadequate because I think that all that we human beings talk about are relations that arises in our operation in language as a closed domain of recursive consensual coordinations of behaviors. Let me explain what I say with a few words about living, language, and cognition, and then answer the question what distinctions do we make or connote when we talk of time?

Αφιέρωμα στον Χρόνο

Nicolas Poussin, Dance to the Music of Time, circa 1638

 

Του Νίκου Τσούλια

Σήμερα, στο τέλος του χρόνου, είναι η μέρα της ποικιλομορφίας των προσεγγίσεων για το μέγα ζήτημα του Χρόνου, είναι …χρόνος του κορφολογήματος διάφορων προσεγγίσεων και θεωρήσεων, επιστημονικών, στοχαστικών και φιλοσοφικών, ποιητικών. Υπάρχουν κείμενα εκπληκτικά, κείμενα γνώσης και προβληματισμού, κείμενα που θα ξαναδιαβαστούν και θα ξαναδιαβαστούν, κείμενα που έχουν αποθησαυριστεί σε …βάθος χρόνου και έχουν αξιολογηθεί με ιδιαίτερη επιμέλεια.

Physicists Simulate the End of Time in a Maryland Lab

By George Musser |Scientific American Jul 28, 2011

Last October I had an article in Scientific American about what it would mean for time to end—how the world might cease to unfold in a unidirectional sequence of cause and effect. Some processes, for example, could cause time to morph into just another dimension of space. Last week experimenters announced that they have simulated such a temporal calamity in the laboratory. Unable to keep up with the gush of physics papers on the preprint server anymore, I came across this one on the arXiv blog, which I highly recommend to all physics aficionados.