measurement

Using a fiber-based optical profilometer NASA measures the thickness of liquid nitrogen in cryogenic chambers at its Propulsion Systems lab because these profilometers use fiber-based probes which can withstands the extreme environment, can be located hundreds of meters away from the interferometer and fit in the tight chamber which standard full-field profilometers with a human operator could not. The signal quality stays constant over the distance.

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Dear Colleagues:

The Department of Mechanical and Nuclear Engineering at The Pennsylvania State University is seeking applicants for the William E. Diefenderfer Chair in Mechanical Engineering. Attached is a flyer for your information. Please let me know if you have any questions.

Sincerely

Aman Haque

In between stress and strain, which one is the more fundamental physical quantity? Or is it the case that each is defined independent of the other and so nothing can be said about their order? Is this the case?