I was reading some articles about heat transfer and I found that is quite common to use the term "nonlocal" when refering to an "improved" heat equation, for example: http://www.sciencedirect.com.are.uab.cat/science/article/pii/S0375960107015745
Title"Title: Nonlocal heat transfer in nanostructuresnanostructures"
Abstract"Abstract: Kinetics of electrons in a degenerate conductor heated up by absorption of a high-frequency field localized in a region of about hundred nanometers has been studied. A new law for nonlocal electron thermal flux has been predicted."
What do they refer with nonlocal heat transfer? What is nonlocal?
Thank you very much!