**Author details**

Kåre Hauge NTNU, Norwegian University of Science and Technology, Trondheim, Norway

\*Address all correspondence to: kare.hauge@ntnu.no

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
