Po lewej stronie identyczne warunki początkowe. Po prawej — nieco różniące się…
I am pleased to send you the first Announcement of the 27th International Symposium on Vibrations in Physical Systems, 9–13 May 2016, at the beautiful place in Greater Poland Province — Bedlewo near Poznan.
The Institute of Applied Mechanics of Poznan University of Technology and the Poznan Division of Polish Society of Theoretical and Applied Mechanics, with support of the Committee of Mechanics, Mechanical Engineering Committee of the Polish Academy of Science and the Polish Society of Diagnostic Engineering, kindly invite persons interested in participation in 27th Symposium on Vibrations in Physical Systems.
More information on the Symposium, a registration form and deadlines can be found on the official website: http://www.vibsys.put.poznan.pl
The organizers will do their best to create a friendly atmosphere for both discussion and rest.
We are looking forward to meet you in Bedlewo,
Marian W. Dobry
Chairman of Organizing Committee.
…choć z braku
kompetencji słuchu niezbyt intensywnie się nią zajmujemy:
Hura! Nareszcie koniec trudnych zadań z suchym tarciem!
Warto wiedzieć jak ustawić parametry analizatora. Od nich zależą wyniki i ich interpretacja.
Idą wakacje, więc warto zająć się czymś lżejszym. Tym razem historia analizy harmonicznej — jednego z naszych podstawowych narzędzi.
Kolejne odcinki pojawiać się będą co tydzień.
One rather little known fact about the law of conservation of energy is that this law is equivalent to saying that time is symmetric when reversed. A full understanding of this requires advanced physics and it does assume there are no energy losses during the process (such as heating or an increase in disorder). It is only when including the useless heat energy lost in converting one form of energy into another that the true nature of energy is realized to be a conserved quantity. You always have the same amount of energy before and after any time or process. The energy is simply converted into one or more different forms through any sequence of operations or events.
Źródło: Conservation of energy
Now physicists at MIT have developed an experimental technique to simulate friction at the nanoscale. Using their technique, the researchers are able to directly observe individual atoms at the interface of two surfaces and manipulate their arrangement, tuning the amount of friction between the surfaces. By changing the spacing of atoms on one surface, they observed a point at which friction disappears.
Źródło: Vanishing friction | MIT News