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Search: WFRF:(Andersson G) > University of Gävle

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1.
  • Elmqvist, Thomas, 1963-, et al. (author)
  • Urbanization in and for the Anthropocene
  • 2021
  • In: npj Urban Sustainability. - : Springer. - 2661-8001. ; 1:1
  • Journal article (peer-reviewed)abstract
    • Key insights on needs in urban regional governance - Global urbanization (the increasing concentration in urban settlements of the increasing world population), is a driver and accelerator of shifts in diversity, new cross-scale interactions, decoupling from ecological processes, increasing risk and exposure to shocks. Responding to the challenges of urbanization demands fresh commitments to a city–regional perspective in ways that are explictly embedded in the Anthopocene bio- techno- and noospheres, to extend existing understanding of the city–nature nexus and regional scale. Three key dimensions of cities that constrain or enable constructive, cross scale responses to disturbances and extreme events include 1) shifting diversity, 2) shifting connectivity and modularity, and 3) shifting complexity. These three dimensions are characteristic of current urban processes and offer potential intervention points for local to global action.
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2.
  • Rönnow, Daniel, et al. (author)
  • Surface Roughness Effects in Ellipsometry: Comparison of Truncated Sphere and Effective Medium Models
  • 1995
  • In: Optical materials (Amsterdam). - : Elsevier BV. - 0925-3467 .- 1873-1252. ; 4:6, s. 815-821
  • Journal article (peer-reviewed)abstract
    • We investigate the applicability of effective medium models for describing the effects of surface roughness on ellipsometric data. The ellipsometric parameters of a model surface composed of truncated spherical bumps on a substrate were calculated and compared to the Bruggeman effective medium theory. It is possible to fit the model calculations with the Bruggeman theory. However, the thickness and volume fraction of the effective medium layer describing the surface roughness do not correspond to the physical height and volume fraction of the bumps on the model surface.
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