Working with the museum's art conservators, Walton and his collaborators used non-destructive and non-invasive techniques to extract information about the paintings» underlying surface shapes and color. (sciencedaily.com)
But how, without history, can we understand these events, discriminate their significance, sift out the large from the small, see the basic currents underlying surface movements and changes, and foresee the result sufficiently to guard against fatal error or the souring of unreasonable hopes? (valueinvestingworld.com)
Consequently there is a seasonal dependence related to changes in underlying surface conditions, which indroduces uncertainties in some regions in some models (Chapter 10). (ipcc.ch)